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NATIONAL AERONAUTICS AND SPACE ADMINISTRATION 



Apollo 16 Spacecraft Commentary 



April 16 - April 27,1972 




MANNED SPACECRAFT CENTER 

HOUSTON,TEXAS 



3-2 



iUPOUO 16 



TABLE 3-1.- SEQUENCE OF EVENTS 



9 



Events 



Elapsed time 
Hr :inln : sec 



Lift-off (Eange zero = 17:5*^:00 G.m.t., 


April l6, 1972) 


00 


00 


00 .6 


Earth ortit insertion 




00 


11 


:56 


T;"anslTina-r injection maneuver 




02 


33 


37 


S-IVB/coimnand and service module separation 


03 


Ok 


59 


Translunar docking 




03 


21 


53 


Spacecraft ejection 




03 


59 


15 


First midcourse correction 




30 


39 


•01 


Scientific instrument module door jettison 


69 


59 


:01 


Limar orbit insertion 




Ik 


28 


28 


S-IVB lunar impact 




75 


08 


Oh 


Dsscent orbit insertion 




78 


33 


■h5 


Lunar module undocking and separation 




96 


111 


00 


Circularization maneuver 




103 


21 


1+3 


Powered descent initiation 




10 h 


17 


25 


Lunar landing 




10 li 


29 


35 


Mission Control Center time update (+00: 




118 


06 


31 


Start first extravehicular activity- 




118 


53 


38 


Apollo lunar surface experiment package 


first data 


121 


hh 


00 


End first extravehicular activity 




126 


Oh 


1+0 


Start second extravehicular activity- 




lh2 


39 


35 


End second extravehicular activity 




150 


02 


1+1+ 


Start third extravehicular activity 




165 


31 


28 


Plane change 




169 


05 


52 


End third extravehicular activity 




ITl 


11 


31 


lunar ascent 




175 


31 


:t+8 


Vernier adjustment maneuver 




175 


h2 


18 


Terminal phase initiation 




176 


26 


05 


I'erminal phase finalization 




177 


08 


:l+2 


Docki ng 




177 


Ui 


18 


Lvmar mod-ule jettison 




195 


00 


•12 


Separation maneuver 




195 


03 


13 


>5ass specftrometer experiment and boom jettison 


195 


23 


12 


fiubsatellite launch 




196 


02 


09 


Transearth injection 




200 


21 


33 


Mission Control Center time update {+2h: 


1^6:00) 


202 


18 


12 


Second midcourse correction 




21*+ 


35 


03 


Start transearth extravehicular activity 




218 


39 


h6 


End transearth extravehicular activity 




220 


03 


28 


■i^Tiird midcourse correction 




262 


"37 


21 


Command module/service module separation 




265 


22 


33 


liatry interface (i+00 000 feet) 




265 


37 


31 


Begin blackout 




265 


37 


1+7 


End blackout 




265 


hi 


01 


Forward heat shield jettison 




265 


k5 


25 


Drogue deploytDent 




265 


h5 


26 


!"5ain parachute deployment 




265 


k6 


16 


Landing 




265 


51 


05 



""See Table 3-II for identification of events shown in this table. 



APOLLO 16 MISSION COMMENTARY h 116 fl 1 CST'*10:22 



1/1 



PA.0 This is Apollo Saturn Launch Control. 

We're at T-minus 1 hour 30 minutes 58 seconds and counting. 
Just seconds from now a final gem's spares release will be 
made. A gemshere is a weather balloon which measures the 
winds aloft. However, we don't anticipate any problems with 
any type of weather this morning. The spacecraft checkout 
is continuing ahead of schedule according to the test con- 
ductor Skip Children. The cabin purge has been completed 
and the spacecraft pressurized with a 60-40 mixture of 
oxygen and nitrogen. This mixture is similar to air, is 
pressurized slightly above the ambient pressure and then the 
crew checks for any possible decay in that pressure. This 
insures that we've had a proper seal with the hatch, which 
c£.me closed earlier and that we have no spacecraft leaks. 
These activities continuing at this time. T-minus 1 hour 
30 minutes 9 seconds and counting. This is Kennedy Launch 
Control . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/16/72 CST: 10:33 



2/1 



PAO This is Apollo Saturn Center Launch Control 

we're at T minus 1 hour 20 minutes 57 seconds and counting. 
Just a short time ago, a first motion signal was sent to the 
vehicle. This signal is send down and checked in Houston and 
by the Range to ensure that they in turn are receiving it and 
will receive it at lift-off. Pressure check have been com- 
pleted inside the spacecraft and the booster protective cover 
is now being placed over the hatch. The wh i te - gr come d crew 
is completing storage and taking down the environmental pro- 
tection plates around the spacecraft. They'll be leaving the 

pacecraft shortly and at about T-minus 43 minutes in the count- 
down. The white room will be retracked to the 12 degree 
mark. This is after the crew has completely cleared the -- 
the close out crew has completely the cleared the area. They are 
expected to be clear of the area by the T-minus 55 minute 
mark. Our countdown is continuing smoothly at this time. T 
minus 1 hour 20 minutes, 1 second and counting. This is 
Kennedy Launch Control. 



s 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k I l(i 11 1 10:42 CST 



3/1 



PAO This is Apollo Saturn Launch Control T minus 

1 hour 10 minutes 58 seconds and counting. At the 1 hour and 
13 minute mark, scheduled with a cue-ball simulated command, this 
command goes to the cue-ball and is read out in the spacecraft by 
the spacecraft commander. The cue-ball is an angle of attack 
here pirched above the launch escape system, and it's used to 
give the spacecraft commander and the crew any signals which would 
indicate an out of tollerance condition during the early stages of 
flight. The count down moving alone well at this time. T minus 
1 hour 10 minutes 25 seconds and counting. This is Kennedy 
Launch Control . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h / Id / 11 10:52 CST 4/1 



This is Apollo Saturn Launch Control. We're 
at T minus 1 hour 59 seconds and counting, going into the final 
hour of the countdown. The spacecraft stabilization and control 
system has been powered up checks have been run on that by the 
spacecraft Commander John Young and the Command Module Pilot 
John Mattingly. We've also just received word that King Hussein 
has landed on the airstrip at Cape Kennedy and will be over to 
the Kennedy Space Center shortly to view the launch. Our count- 
down is continuing here at Kennedy Space Center. We'll switch 
now to the Mission Control Center in Houston for a status there. 

This is Apollo Control Houston at minus 
1 hour and counting. The worldwide manned spaceflight network 
is prepared for launch at this time. The network is clean 
without discrepancy. The calm but intent atmosphere best 
describes the mood of the Mission Control Center at this time. 
Our cast of characters today - Flight Director Gene Kranz, the 
most veteran of the active flight directors wearing his tradi- 
tional white vest. This is his team - the white team of flight 
controllers. Our Cap Coram Gordon Fullerton served in the 
same capacity in Apollo 14 when the Alan Shepard crew was 
also launched on a Sunday. At all of the consoles here in 
Mission Control Houston an experienced team of flight controllers 
ready to swing in action in less than an hour. This is Apollo 
Control Houston. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k I lb / 11 CST 11:01 5/1 



PAO This is Apollo Saturn Launch Control 

at T-mlnus 54 minutes and counting, T-minus 54 minutes and 
counting. Earlier this morning the cryogenics were loaded 
aboard the Saturn 5 space vehicle. The flight crew then 
came aboard and is now onboard completing a series of com- 
munications checks. The weather continues to be clear as 
it's supposed to be for our launch time, and we continue to 
aim for a launch at 12:54 PM Eastern Standard Time. The 
Command Communications System which carries the launch vehicle 
Ccmraands on S-band frequency has now been turned on for launch. 
The liquid hydrogen-liquid oxygen, the cryogenic fuels, loaded 
earlier, are continuing to be topped off. Countdown continuing 
at this time. We've just received word that the Vice Presi- 
dent of the United States, Spiro Agnew, has arrived at 
Cs.pe Kennedy and is coming across the Kennedy Space Center 
to view the launch. Now at T-minus 53 minutes and counting, 
this is Kennedy Launch Control. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 11:03 CST 6/1 

, This Apollo Center Launch Control passing 

the 51 minute mark, T- minus 50 minutes, 57 seconds and count- 
ing. And just received report that the launch site recovery 
forces and the helicopters are on station and ready to sup- 
port the launch of Apollo 16. D van becon checks are under 
way at this time. The -- our becons aboard the instrument 
unit of the space vehicle and use for tracking by the eastern 
test range during powered phase of flight. Both of the high 
speed elevators that launch complex 39A, these are high speed 
elevators and the mobile launcher are parked now — the 
320 foot level as the crew disclose after has moved clear of 
the area. The swing arm, swing arm 9 has just moved back to 
the retrack position. This is a 12 degree standby position. 
From this position, it can be quickly returned to the space- 
craft. If needed, and will remain at this parked position 
until the final moment of launch at T-minus 5 minutes approxi- 
mately, it will swing back to the full retrack position. 
The countdown is continuing at this time, T- minus 49 minutes, 
seconds m counting, this is Kennedy Launch Control. 

END OF TAPE 



APOLLO 16 MISSION COMMENTARY kjieill CST 11:09 9/1 



Pj^O This is Apollo Saturn Launch Control. 

We're at T-minus 34 minutes 56 seconds and counting. At 
this time the Support Controller, Joe Barf us, has indicated 
that the Industrial water system is ready to support the 
launch. At the T-mlnus 1 minute mark, the flame deflector 
underneath the 5 Saturn 5 first stage engine will start 
being covered with water coming oiit at 13 000 gallons per 
minute. At the T- 0 mark the swingarms will be quenched with 
water 7500 gallons per minute. As the vehicle lifts off 
at the plus 2 second mark, 50 000 gallons per minute of water 
will flush the mobile launcher decks and another 30 000 gal- 
lons will be plunging the flame deflectors. In the space- 
craft, the astronaut team is making a series of switch checks, 
spacecraft commander has made checks following the retraction 
of swingarm 12 to arm the various pyrotechnics, this includes 
the launch escape system aboard the vehicle. Range safety 
command checks have now been completed. T-minus 33 minutes 
54 seconds and counting, this is Kennedy Launch Control. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k I Yd 1 11 11:11 CST 



7/1 



PAD This is Apollo Saturn Launch Control. T-minus 

43 minutes and counting. A critical power transfer test was just 
conducted. During this test the flight vehicle batteries take on 
the work load having been shared up to that point by an external 
source. We've gone back to that external source again and we'll 
stay on that saving the flight batteries until the final minute, 
ap Droximately 50 seconds in the count down. Superintendent of 
range operations just reported that the Kennedy Space Center is 
clear for launch. Now T-minus 42 minutes 30 seconds and counting, 
this is Kennedy Launch Control. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY M lb / 12 CST: 11:26 



10/1 



^ This is Apollo Saturn Launch Control, we're 
at T-minus 27 minutes, 58 second and counting. Just a few 
moments ago, various elements of the launch team begaln re- 
porting into the test supervisor, Gordon Turner, reporting 
that we were go for continuing the countdown. At this time, 
we're continuing to look at the problem with a backup yaw 
gyro. This is still being evaluated but we expect a resolu- 
tion on that momentarily. Various other elements of the 
countdown all continuing well at this time, T-minus 27 minutes, 
30 seconds and counting. This is Kennedy Launch Control. 

END OF TAPE 



APOLLO 16 MISSION COMMENTARY hjlt/ll 11:29 CSI 



11/1 



PAO This is Apollo Saturn Saunch Control. We're 

at T minus 24 minutes 58 seconds and counting. The problem which 
we spoke of earlier, the problem with a backup YAW-GYRO has been 
resolved and we have been given a go for launch. All possible 
modes of failure were evaluated should this be a problem with 
flight hardware and it was determined after evaluating each of 
these that they would have no impack on the mission. Liquid 
oxygen, liquid oxygen, liquid hydrogen continue to be top off in 
the space vehicle and our weather continues to be good, predicted 
to be good for launch time. Aiming for a 12:54 pm Eastern Standard 
Time launch. Now at T minus 24 minutes 15 seconds and counting, 
this Kennedy Launch Control. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h/lb/12 11:30 CS T 8/1 

PAO This is Apollo Saturn Launch Control 

T minus 39 minutes 58 seconds and counting. Underway at this 
time are some checks of the Range Safety Command System. Dur- 
ing these checks the signal is sent to receivers aboard the 
3 stages of the Saturn V launch vehicle. This receiver is 
connected to distruct packages aboard the vehicle. If the 
vehicle should stray off path due to a malfunction, the Range 
Safety Officer could elect to send signals by way of these 
receivers to the distruct package. This would be done only 
after the Astronaut crew, of course, had executed their abort 
and were well away from the vehicle. During these tests the 
signals are sent with the distruct packages in an unarmed con- 
dition.. It s a check to insure that the signals are reaching 
the distruct packages or at least for the test reaching the 
receiver. The swing arm is now in the 12 degree position or 
parked position. The astronaut crew aboard the spacecraft now 
in an emergency situation could use their launch escape tower 
to clear themselves well away from the spacecraft in an emergence 
from the space vehicle in an emergency. In such an emergency 
they would be carried to a proper altitude at which the regular 
spacecraft parachutes would deploy and the crew then would make 
a normal recovery. They also have the option where the swing 
arm, at the 12 degree position to call it back where they could 
quickly then go across the swing arm, again having an option of 
either taking an elevator to safe carry at the bottom of the pad 
or a slide wire which has a cab attached to it which would carry 
them to the pad parameter. These would be decisions depending 
on the type of emergency. In the Launch Control Center the 
Vice President of the United States, Spiro Agnew, just walked 
into the viewing room and he will make plans to view the launch 
from here. Now at T minus 38 minutes 10 seconds and counting 
this is Kennedy Launch Control. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k I \b 1 11 CST: 11:35 12/1 

This is Apollo Saturn Launch Control, T-minus 
19 minutes and counting. T minus 19 minutes and counting, we 
just received word from recovery forces that all recovery forces 
are on station and ready to support the launch of the Apollo 16. 
Also, the Manned Spaceflight Network has indicated they are ready 
to support. An earlier problem with a power dropout in the switch- 
ing station in Monrovio. West Virginia, has been taken care of by 
going to a backup station. T-minus 18 minutes, 34 seconds and 
counting, this is Kennedy Launch Control. 



END OF TAPE 



AP3LL0 16 MISSION COMMENTARY h j Id 1 11 11:39 C.S.T. 12/1 

p^O This is Apollo Saturn Launch Control. 

We are at T minus 14 minutes, 59 seconds and counting. Scheduled 
at this time are some Mission Control Center updates to the 
computer clock aboard the command module. This is actually 
synchronizing the spacecraft timing system with that in the 
mission control center. Also the Command Module Pilot Ken 
Mattingly has been giving readouts on the service module 
quadrant. These are giving temperatures, pressures, and fuel 
quantities. A short time ago the S-II start tank chill down 
began. This is chilling that system to prepare it to accept 
the extremely cold liquid hydrogen. Computer checks are 
underway also at this time. A check going on is being checked 
with the vehicle digital computer to be sure that it is in 
the prepare to launch mode. Several of these computer checks 
are run during the count to insure proper communication between 
the computers in the launch control center and the mobile 
launcher and also to insure they are in the correct mode. 
Countdown continuing now. Passing the T minus 14 minute mark. 
This is Kennedy Launch Control. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hjlb/ll CST: 11:45 



14/1 



This is Apollo Saturn Launch Control, T minus 
10 minutes and counting. We just heard from the spacecraft 
commander John Young that Casper and Orion are go for launch. 
The spacecraft is now on full internal power. Up to this point 
it's been sharing its power load with the ground supply. Short 
time ago, the astrocomm circuit was checked out. This is the 
circuit that the astronauts will be on during the launch phase. 
They'll be on this with Stony, the astronaut communicator here 
in the Launch Control Center, the launch operation's manager 
Paul Donnelly and the spacecraft test supervisor. Skip Chauvin, 
The crew, actually, goes on in the astrocomm circuit at the 
T minus 4 minutes mark in the countdown. Our weather continues 
to look good for a launch as we aim for a 12:54 PM eastern 
standard time liftoff. Now at T minus 9 minutes, 11 seconds 
and counting, this is Kennedy Launch Control. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k/lblll 11:48 CST 



15/1 



PAD This is Apollo Saturn Launch Control, we're 

now passing the 6 minute mark in the countdown. Emergency 
detection system has now been placed in the launch mode. Houston 
flight has also indicated that they are GO for the automatic 
sequencer. At the T- 3 minutes 7 second mark the launch will go 
on the automatic sequencer and from that point on the launch 
will be automatically handled by the sequencer. Coming up on 
the T-5 minute and 30 second mark at that time we'll be stand- 
ing by for a go to launch from Mission Director, Chet Lee. 
Mission Director verifies GO for launch. Mission Director 
Chet Lee from Houston verifies GO for launch. All elements 
now reporting Into the test supervisor Gordon Turner that 
they are go for launch. Now at T-5 minutes 13 seconds and 
counting this is Kennedy Launch Control. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h/l()fl2 CST: 11:50 16/1 

T minus 4 minutes, 32 seconds and count- 
ing and swing arm number 9 is now swinging back to the full 
retrack position. The astronaut crew aboard are making their 
final switch check reading off these final positions separation 
for launch and as we approach the final minutes here, we'll 
go into a relatively sillent period as far as reporting goes, 
the launch team indicate that they will have only negative 
reporting. If there's problem, only, will they come up on the 
air at this time. Now at T minus 4 minutes, 3 seconds, and 
counting, this is Kennedy Launch Control, 

This is Kennedy Launch Control, Launch 
Operation's Manager Paul Donnelly just called the three 
astronauts and says that the Apollo 16 Launch Team wishes 
them good luck and God speed. They all replied "Thank you" 
and we now have a quiet circuit as they switch over to the 
astrocomm circuit. We're now at T minus 3 minutes 24 seconds 
and counting. We're approaching the time when the countdown 
goes on the terminal sequencer. The sequencer commands a 
variety of functions all which must occur in the proper sequence 
for the count to continue. Also, here in the Control Center, 
the people will continue to monitor what are called the red 
line values to ensure that everything is go for launch. The 
instrument unit flight, panel light now, on the status board 
indicate instrument unit ready, spacecraft ready, emergency 
detection system ready. We've passed the 2 minute, 50 second 
mark and we're now on the terminal sequencer. The terminal 
sequencer has started. The terminal sequencer will pressurize 
the fuel tank. These fuel tanks are pressurized to ensure that 
as the fuels dep.ete they are forced down to assure an even flow 
into the engine. The fuel tanks are now being pressurized. 
The S-IVB or third stage sequent oxygen tank has just been 
pressurized and the second stage, liquid oxygen tank has been 
pressurized. As we move down through the count at the T minus 
17 second mark, we'll get a release of the guidance system in 
the instrument unit. Also, handled by the automatic sequencer 
will be the release of swing arms number 1 and number 2. The 
Ignition of the Saturn V. five engines first stage five engines will take 
place at 8.9 seconds in the countdown, 8.9 seconds. That'll be the 
engines or the vehicle will then be held down until we build up 
t.l million pounds of thrust. At the T minus 3 minute mark, tape 
recorders onboard the spacecraft were turned on. These recorders 
record both voice and data. The spacecraft now to full internal 
cooling. The cooling load has been shared with the ground cooling. 
1 minus 90 seconds and counting. T- minus 90 seconds and 
counting. At T minus 1 minute, 15 seconds, the spacecraft 
batteries will be turned on for launch. These batteries will 



APOLLO 16 MISSION COMMENTARY h j Id 1 11 CST: 11:50 



16/2 



P AO 



'ive an additional power source to the 



spacecraft as well as acting as 
The third stage liquid hydrogen 
third stage tanks pressurized, 
pressurized. T minus 1 minute, 
ing. Now — 



a backup for the fuel cells, 
tank now pressurized, all 
Second stage tanks also 
T minus 1 minute and count- 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/16/72 11:53 CST 



^'^O T minus 1 minute, T minus 1 minute and 

counting. Now moving into a final minute of the count. We'll 
be standing by to - for the switchover to internal power. 
Switchover taking place at this time going on internal power. 
T minus 45 seconds and counting Guidance aline just announced 
by John Young. That will be the last action taken by the crew 
aboard the spacecraft. T minus 35 and counting. Countdown 
continuing to go well, T minus 30, T minus 25 , 2 4, 2 3, 22 , 21 , 
20, 19, 18, 17, guidance release 15, 14, 13, 12, 11, 10, 9, we 
have ignition sequence start. The engine is now building up to 
7.7 million pounds of thrust. We have a launch commit and 
we have a liftoff. The swing arm is moving back. Saturn V 
lifting off the pad, building up thrust. Refer the tower. 

Houston is now controlling. 

Now we have good thrust in all 5. 

Roger. 

Pitch and roll program started. 
S C Ro ge r . 

16 now manuevering to its proper flight 
path attitude. Mark 27 seconds - 36 seconds roll program com- 
pleted, pitch profile still in progress - 40 seconds. Mark 
50 seconds - cabin pressure relieving. Adjusting now from 
sea level to a space environment, 2 nautical miles in alti- 
tude . 

CAPCOM Stand by for code 1 BRAVO. 

S C Ro ge r . 

CAPCOM Mark, 1 BRAVO. 

CAPCOM You are sea wet, 16. 

S C Roge r. 

That callout from CapCom Gordon Fullerton 
says Apollo 16 now capable of water landing. Mark 1 minute 
12 seconds coming up on period of maximum aerodynamic pressure 
on the vehicle. 1 minute 22 seconds 6 nautical miles in 
altitude looking good. Mark 1 minute 30 seconds - 8 nautical 
miles in altitude. Mark 1 minute 41 seconds to pass through 
max Q, still looking good. 

CAPCOM Through Max-Q and everything looks good. 

16 now 12.5 nautical miles in altitude. 
Young, Duke, Mattingly moving out to the outer traces of the 
earths atmosphere. 

CAPCOM Standby for mode 1 CHARLIE. 

Roger, we're at 5 point CHARLIE. 
Mark 2 minutes 3 seconds. The status 
check in Mission Control by Flight Director Gene Krantz. The 
GO/NO-GO for staging. Coming up on center engine shutdown. 
SC Shutdown. 



APOLLO 16 MISSION COMMENTARY h/lb/H CST 11:53 17/2 



26 
2 



CAPCOM 
s taging. 

P AO 
2 8 s e con ds , 
dcwn range . 
up on s taging • 

SC 

CAPCOM 
P AO 

Y c ung , Duke , 
engine. 

CAPCOM 

P AO 



Look at your N-board. You're go for 



Center engine shutdown on 
nautical miles in altitude, 32 



minutes 35 seconds 



_ ■> 



minutes 



time . 2 minutes 

nautical miles 

40 seconds coming 



the S2 



Staging after ignition on 
Roge r . 

2 minutes 53 seconds, a normal 
Mattingly now riding on 5 good second 



s taging 
stage 



Go on all 
3 minutes 



5 on the S2 . 
2 seconds , the 



gi ant 



stage falling away now, it's days work completed, 
new 46 nautical miles in altitude, 80 nautical miles down- 



first 
Ap o 11 o 



16 



range. Coming up 
SC 

CAPCOM 
SC 

CAPCOM 
you're in mode 2 
SC 
PAO 

tcwer is ejected on 
re q ui re d . 

CAPCOM 

S C 

PAO 



on skirt sep and tower jettison. 
On t irce . 
Roge r . 

Tower jettisoned. 

Roger and we confirm your skirt sep, 
n ow . 

Roger, mode 2. 

3 minutes 28 seconds, the launch escape 
time. Its surveillance role no longer 



CMC is GO. 



9000 pounds lighter, 
and everything 



up 
to 



h e re too, 
see that 



Steering has converged, 
Ro g e r . 

Mark 3 minutes 45 seconds. Apollo 16 
new 62 nautical miles in altitude, 135 nautical miles down 
range. Apollo 16 now 33 feet shorter and 
Unincumbered now for its mission in space 
CAPCOM 16, Houston. 1 minute 

Icoks great down here. 

SC Roger. It looks good 

SC Hey Gordie, you ought 

horizon, just gorgeous. 

PAO Mark 4 minutes 10 seconds, 70 nautical 

miles in altitude, 170 nautical miles down range. Velocity 
new reading 10 600 feet per second. Mark 4 minutes 30 sec- 
onds in Mission Control Trajectory Data driving right down 
the middle of our plot boards as expected. Right now the 
flight path data is GO, Mark 4 minutes 45 seconds, 76 
nautical miles in altitude, 220 nautical miles down range. 
Mark 5 minutes 10 seconds, still good performance on all 
5 of the second stage engines. Second stage shutdown pre- 
dicted at 9 minutes 19 seconds. 

CAPCOM 16, Houston. Times are nominal. Level 



APOLLO 16 MISSION COMMENTARY M lb 1 11 GST 11:53 17/3 



CAPCOM sense of the A plus 37 and cutoff at 

9 plus 19. 

SC Roger. 

PAG Mark 5 minutes 40 seconds, another 

status check in Mission Control by Flight Director Gene 
Kranz. His console is coining up all green, looking good 
at this time. 

CAPCOM By for S4B to COI capability. Mark, 

you h ave it no w . 

SC Roger. 

PAG Coining up on 6 minutes. CapCom Gordon 

Fullerton reporting that 16 capable of reaching a minimum 
orbit with a good third stage and service module engine. 
We're at 6 minutes 8 seconds. Apollo 16 88 nautical miles 
in altitude, 380 nautical miles downrange. Mark 6 minutes 
30 seconds, velocity now reading lA 880 feet per second, 
altitude 90 nautical miles for Apollo 16. Downrange dis- 
tance of 440 nautical miles. 

CAPCOM Stand by for S4B to orbit. Mark. You 

h ave it n ow . 

S C Ro ge r . 

P AO 6 minutes 50 seconds. 

SC Delta, Gor die. 

CAPCOM Roger, CHARLIE. 

PAO Young, Duke, Mattingly now told that 

they can reach orbit if given a good third stage. Mark 7 
minutes, 91 nautical miles in altitude, 496 nautical miles 
downrange. Mark 7 minutes 15 seconds. 16 flying almost 
parallel over the ocean now with the young crew in a pitched 
down position. Really moving out now for downrange distance. 
We show Apollo 16 55 1 nautical miles downrange. Velocity 
now reading 17 5 2 7 feet per second. Coming up on center 
engine shutdown. 

CAPCOM Roger. Inboard. 

PAO Center engine shutdown on time. 7 min- 

utes 50 seconds. 92 nautical miles in altitude. 620 nautical 
miles downrange. Still showing stable thrust on the other 
4 engines. They've got about a minute to go in burn time 
re main i n g . 

CAPCOM 16, at 8 minutes, looking good here. 

SC PU shift. 

PAO Mark 8 minutes 25 seconds. 

CAPCOM 16, Houston. We saw the PU shift 

looks good and your GO for staging. 
SC Roger. 

PAO 8 minutes 35 seconds. Apollo 16 now 

93 nautical miles in altitude, 756 nautical miles downrange. 



APOLLO 16 MISSION COMMENTARY t\ I \h 1 11 CS T 11:5 



CAP COM Post on time now. 

SC Roger. 

^ ^'^ That terse response from Apollo 16 

Commander John Young. We're at 8 minutes 52 seconds. Apollo 



16 now 807 nautical 
altitude. Velocity 

CAP COM 
You have Mode 4 now 

SC 

CAP COM 
SC 
PAO 

CAP COM 
SC 
PAO 

Saturn stages 



miles downrange. 92 nautical miles 
now reading 21 642 feet per second. 
Stand by for Mode 4 capability, Mark 



there was S2 shutdown. 



igni ti on . 
30 s e con ds 



n auti - 

per 

Mis- 



p re- 



Okay , 
Ro ger , 

And we have S 4B 
Mark 10 minutes 
Good on the S4B. 
Ro ger . 

The Young crew has used up 2/3 of their 
on the way to orbit. We see good performance 
on the third stage, the S4B. That mode 4 report says Apollo K 
can achieve orbit on spacecraft power only. 9 minutes 50 
seconds. Apollo 16 93 nautical miles in altitude 1011 
cal miles downrange. Velocity now reading 23 654 feet 
second. Mark 10 minutes 18 seconds of status check in 
sion Control for orbit, 

CAPCOM Apollo 16, Houston. You're GO for 

orbit. Predicted cutoff 11 plus 49. 
SC Roger. 1 - 49. 

PAO Mark. 10 minutes 40 seconds. The 

dieted time of shutdown, 11 minutes 49 seconds. Apollo 16 
now 93 nautical miles in altitude, 11 092 nautical miles 
downrange. Mark. 11 minutes. Showing a buildup in velocity 
now reading 24 621 feet per seconds and accelerating. Mark, 
11 minutes 10 seconds. Velocity now reading 24 887 feet per 
second, 98 per cent of the desired speed for insertion in 
orbit. Less than 20 seconds now from time of shutdown, 
Mark, 11 minutes 
miles downrange. 

CAPCOM 

SC 

PAO 

SC 

CAPCOM 
PAO 

CAPCOM 
is safe. The orbit 

SC Roger, 
looking out the window. It 
the thing worked like a gem. 

CAPCOM Sure did 



40 seconds. Apollo 16 now 14 000 nautical 
SECO 

Roger. OFF. 

That was shutdown, right on the money. 
Ditch 1 is coming off. 
Ro ger. 

Mark, 12 minutes 25 seconds - 
16, Houston. The range safety system 
is GO. 



Boy, it's just beautiful 
s just really fantastic. 



up here 
And 



APOLLO 16 MISSION COMMENTARY hlltlll CST 11:53 17/5 



CAPCOM 
radar Is 95 by 90. 
PAO 

enthusiastic report 
John Young. Apollo 



copy. Now 62, and your orbit by 



Mark, 12 minutes 54 seconds. That 
from orbit V7as from spacecraft Commander 
16 in what appears to be a safe orbit. 
Preliminary manuevers show 95 nautical miles 
miles. The Saturn 5 once again the apparent 
tug-a-war struggle with the earths forces of 
at 13 minutes 20 seconds ground elapsed time 
is in orbit. 



by 90 nautical 
victor in its 
gravity. We ' re 
and Apollo 16 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/16/72 12:07 CST 



18/1 



CAPCOM 16, Houston, 

reconfigured for (garbled) 

CAPCOM 16, Houston, 
p 1 us . 06 . Over . 



The booster looks good. It's 
The Z-torqulng angle will be 



SC 

CAPCOM 
SC 

we ' re getting 
ECS. 

CAPCOM 
CAPCOM 
CAPCOM 
SC 

CAPCOM 
the primary 
reservoir by-pass 

S C 

S C 

put the radiators 

CAPCOM 
ever you just did 



Plus, Roger, plus .06. 
Tha t ' s cor re ct . 

Okay, Gordie, we're on page 211 down through, 
to installing the COAS. That MA was the transduser. 

Roger, Charlie. 
Apollo 16, Houston. 

Apollo 16 through Canarys . How do you read? 
Okay, you sound good, Gordie. 

Okay, we're noticing a possible blockage in 
coolant lube. Would you have John check the glycol 
valve to be sure it's open, 
Roger. Over. 

Hay Gordie. Do you want us to go ahead and 
on? 

Stand by. Charlie, this is 
up there got the coolant lube 



Hous ton . What 
flow back. 



wed 



like 
SC 



to watch 



it for a minute before preceeding, over. 
Okay, we're step 12 page 213 configuration 
with radiators by-pass we've got the original by-pass open 
and will not use them, and they are closed. I can't understand 
what it was though, Gordon. If the (garble) was accidently open, 



p r ob ab ly 
was open, 



at some other time, the by-pass was closed and the inlet 



(Garbled) 



CAPCOM 
SC 



Roger, understand. 

The clouds over (garbled) really is a spectualar 



VI ew 



CAPCOM 
SC 

towards the other 
PAO 

elaps time. That 
appraising the view 
minutes ground - 

CAPCOM 
of the normal ETS 

SC 

CAPCOM 
data down here due 
SC 

radiators now. 
CAPCOM 



down 



Roger. I wish I was there 
I guess we're just over 
islands, and that sure is 
Apollo Control Houston, 
again that was John Young 

over this Canary Island pass. We're at 21 



w i th you. 
Canary looking 
s omething . 

20 minutes ground 
commander of Apollo 



16 



16 , Hous ton. 
con figuration . 
Roger. That's 
16, Hous t on . We 
to a problem with 
Okay, we're back 

Ro ge r . 



You can preceed with the rest 



in work. 

e're having a kind 
Canaries antenna, 
up to glycol, two 



of intermittent 



of the 



APOLLO 16 MISSION COMMENTARY h/l(>/ll 12:07 CST 



18/2 



PAO 

ground elaps time, 
by 91 nautical mile 
with Canary. A qui 
Center by flight di 
to try and pass up 
have loss of signal 
this is Apollo Cont 

CAP COM 
thing looks fine as 
at Carnarvon at 52: 

SC 

CAPCOM 
S C 

now, the sun set is 
GAP COM 



This is Apollo Control Houston. 22 minutes 
We show a present orbit of 96 nautical miles 
s. About a minute to go until loss of signal 
ck status check being taken at Mission Control 
rector Gene Kranz with his flight control team 

the 16 crew before we 
ground elapsed time. 



final few words with 
t 



back now good and every- 
to LOS. We '11 see you 



We re at 23 minutes 
rol Ho us ton . 
16, Houston. Data is 
we come up 20 seconds 
39 . 

Roger, 52 : 39 Gordon. 
Enjoy the view there. 

Well, we're just starting to come into darkness 
just as beautiful as always in the space business 
Roger. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hlldlll GST: 12:17 1971 



PAO 

ground elapsed time 
with the Apollo 16 
52 minutes 39 secon 
at this time peak h 
flight. Peak heart 
dviring the powered 
ciaft commander Joh 
Charles Duke, 130. 
is Apollo Control, 



This Apollo Control, Houston, at 24 minutes 
We ' ve h ad 



loss 

spacecraft. They 
ds ground elapsed 
eart rates during 
rate for Command 



of signal over Canary 
will be reacquired at 
time. We'll pass along 
the launch phase of 
Module Pilot, Ken Mattingly, 
flight phase of flight read 115, for space- 
n Young, 108, and for Lunar Module Pilot, 

At 24 minutes ground elapse time, this 
Hous ton . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 12:24 CST 20/1 



PAO This is Apollo Saturn Launch Control in 

the Launch Control Center at Kennedy Space Center. The suc- 
cessful launch of Apollo 16 took place at 12:54.00569 seconds, 
that is, 569 milliseconds past 12:54. Following the successful 
launch the Vice President of the United States came into the 
firing room and had the following to say to the launch team. 

DR FLETCHER It is the best liftoff we've ever had and 

I think before I say anymore I'd like to introduce the Vice 
President Spiro Agnew. 

AGNEW Thank you. Dr. Fletcher. Ladies and 

Gentlemen you make the superb common place. This is my seventh 
occasion to visit the Cape at the time of an Apollo launch and 
this was one of the finest because as Dr. Fletcher said, he 
thought it was so good. I have noticed one change since I've 
been here and that is that there is so much coolness in the 
room. I think you are getting a little bit bored with this 
thing, aren't you? I know you're not, and I assure that the 
people of this country aren't bored and if you went out in the 
vicinity of the Cape and looked around today you'd probably fin 
the biggest crowd with more people enthusiastic about the space 
program than we've ever seen before. And, I want you to know 
that the administration's interest has not diminished and as 
Chairman of the Space Council mine continues to accelerate 
as I look forward to 17 and through the Skylab launchings to 
foil ow . Wh at's going to come after that will de pend to a great 
extent on the continuation of your expertise and the great 
way you discharge your responsibilities. But you know that the 
people of this country still have that explorer spirit. They 
still h ave that tremendous sense of urgency for the United 
States to be the leader of the world in this kind of tech- 
nological advance. So, congratulations again to - for a superb 
job, and I never fail to marvel at the way you bring these 
things off. We're all with you and we appreciate what you've 
d on e . 

PAO That was the Vice President of the United 

States speaking to the launch team in the firing room — Firing 
Room 1 at the Kennedy Space Center. Now Dr. Bebus has a few 
words . 

FLETCHER Of course, you here in the firing room 

deserve all the credit plus all the thousands that are support- 
ing you, wherever they are. But I think that as the leader 
of the team here at Kennedy Space Center, Kurt Debus deserves 
a little bit of congratulations and I'd like to turn the mike 
ove r to h ira . 

DEBUS Thank you. Mr. Vice President, I'm speakin 

for the launch team of the NASA Kennedy Space Center and would 
like to thank you very much for the support you have given us 
by being here so many times in crucial moments. But you see 



APOLLO 16 MISSION COMMENtar hjl^fll 12:24 CST 20/2 

as! coolness here is merely external. I assure you internally 
we are still quite excited. We will continue to give our 
be;st to make Apollo 17 and the Skylab a success. We are also 
grateful that you have decided to select this center for the 
Shuttle, and since you are almost one of the launch team, we 
hope that you will be one of the first present here as soon 
as they get ready for the first flight. Thank you Mr. Vice 
P res ident . 

PAG That was Dr. Kurt H. Debus director of the 

John F. Kennedy Spacecenter. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/16/72 GST: 12:45 



2 1/1 



PAO This is Apollo Control Houston at 51 minutes 

ground elapsed time. We're standing by. We have begun to acquire 
data over the Carnarvon pass. We presently show Apollo 16 with 
an orbit of 97 nautical miles by 91 nautical miles. We'll stand 
by now for conversations that we'll transcribe between the CAPCOM 
Gordon Fullerton and the crew of Apollo 16. That data being re- 
ceived was instrument unit data. We now have acquisition of 
signal with the command module. 

CAPCOM Apollo 16, Houston through Carnarvon, over. 

SC Bravo Houston. Read you loud and clear. 

CAPCOM You're loud and clear also. 

SC Okay, Gordie. We're down through on page 

217 - 52, and everything is copesetic on all the steps up to that 
point, and I'll let Ken, well, I've got the numbers here. He 
marked on stars 23 and 30. It was NOUN 05 with all balls. 
Torqulng angle were plus 040, plus 031, plus 045, and we torqued 
them at 38:40, over. 

CAPCOM 

SC 

SC 

CAPCOM 
SC 
S C 

about the ride, 
CAPCOM 
booster 
SC 

CAPCOM 
CAPCOM 



Okay, Charlie. We got that. 

And that torqulng angle was just super. 

And you can even see stars. 

Very good. 

Man this is really something. 
Hey, Gordon. Let me tell you 



Gordie. 
a little 



th e 



bit 

stand by one John. We're discussing 
Pressure looks good up here. 



Ok ay , 
data h e re . 

Ok ay . 
Ro ge r • 

John, this is Houston. If there is nothing 
startling to report about the ride, we'd better hold off. We're 
watching, we're evaluating a need for a possible lU nav update 
and also we're seeing some pressure, over pressure in F module 
number 2. We'll give you a full story on that over Honeysuckle. 

SC Okay, I, no there's nothing really spectacular 

difference to report on the ride. We'll hold off on that. 
CAPCOM Okay. 

PAO This is Apollo Control Houston. The rate 

pressure referred to there was on one of the attitude control 
engines. Readings here on the ground indicated it's about 
100 psi above the normal. We're at 57 minutes ground elapsed 
time continuing to monitor on this pass. This is Apollo Control 
H o us t on . 

PAO This is Apollo Control Houston. 1 hour ground 

elapsed time continuting with the pass over Carnarvon and Honeysuckl 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/16/72 CSI 12:55P 22/1 

CAPCOM Apollo 16, Houston. Through Honeysuckle. 

0 ve r, 

SC Go ahead, Gordon. 

CAPCOM 1*11 give you a little story on the 

S--module problem. Evidently S-Module number 2, which is our 
one on top of the vehicle. The one that would cause you to 
pitch away from the earth, the primary helium regulator there 
has failed to the backup. The backup isn't regulating properly. 
Normally it should hold around 190 psi. This pressurizes both 
fuel and oxidizer. And it has gradually increased now up around 
320 range and there is a relief valve which will relieve helium 
pressure at 325 and reseat when the pressure gets down to 225. 
This should be a gradualize of helium. We'll have a better hack 
as the stage passes as to when you could expect a deplete. But 
should you lose control in orbit, go to the procedure on 
L2-10 for service module RCS control of the S-IVB. Over. 

S C Ro g e r . 

CAPCOM 16, we're just about to LOS. The 

pressure shows right - in fact a little bit above the relief 
pressure. We'll have to wait till the states to get a real 
good handle on how it's going to deplete. Over. 

SC Roger. 

PAG This is Apollo Control Houston. At 

1 hour 4 minutes ground elapsed time. We've just had loss 
of signal with Honeysuckle. The problem disc^issed between 
CapCom Gordon Fullerton and the crew of Apollo 16 was one 
relating to the APS, the attitude propulsion system aboard 
the S4B and it deals with the regulator pressures on one of 
the APS, APS number 2. The normal reading is around 190 psi. 
W€! ' ve shown an increase in the range of 320 psi. This system 
relieves at 325 psi and reseats once the number backs off to 
225 psi. These are helium pressures that are being read. 
We're now at 1 hour 5 minutes ground elapsed time, and we 
will switch to Kennedy Space Center for the News Conference 
which will shortly be in progress. 

END OF TAPE 



APOLLO L6 MLSSLON COMMENTARY kllblll CST 1 : 2 3p m 



2 3/1 



PAO This is Apollo Control Houston at 1 hour 

29 minutes ground elaps time. We presently show Apollo 16 at 
an orbit of 96 nautical miles by 94 nautical miles. When we 
pick up over our state side pass, we expect to have seen a 
release cycle with the regulator on the attitude control system 
mode number 2 before we lost data over Australia. We have been 
noting an increase in the pressures on APS number 2. The 
one other point to bare in mind is that one module can control 
the spacecraft during the TLI burn since the only movement during 
that burn would be in roll. We're at 1 hour 30 minutes. We're 

for acquisition. This is Apollo Control Houston. 
How are you doing? 
We have acquisition with Texas, 
Houston, 16. Over. 

Apollo 16, loud and clear. Go ahead. 
Okay. Your 5 by the coast line is under us. 
and we're standing by for some words. The space- 
craft has been holding attitude, just perfect in pitch. 

CAPCOM Okay, John. We'll take a look at the APS 

module here. 

SC Okay. 

SC Gordie, why the late acquisition? 

PAO This is Apollo Control Houston. 1 hour 33 

minutes ground elaps time. An observation we're displeased with 
on the SAB indicates that the mode has probably not released at 
this time. We're probably lost one transducer. There is some 
reason to believe, and we will observe this further, the release 
valve is very possibly feathering. We'll stand 



standing by now 
CAP COM 

PAO 
S C 

CAP COM 
S C 

It's beautiful, 



to 



P 37 



mon i t or . 

PAO 

CAP COM 
S C 

CAP COM 
for lift 



This is Apollo Control Houston. 

Apollo Control Houston. 
Go ahead 16. 

Okay, how are you coming 
I'm ready with the 



At 



by and continue 
1 hour 34 minutes - 



Okay, 
off p 1 us 8 . 



looking at the APS module. 

let's get the pass out of 
SC Okay, 
CAPCOM Okay, 

6 69 73, minus 054 plus 189. 

0 3562 plus 4 balls 1, plus 



on the pass Gordie? 
TLI plus 90 and the 
We're putting together a story and 

No immediate action is necessary so 
the way. 

f Ine . Go ah ead . 

TLI plus 90, SPS/G&N. The weight is 
Time of ignition is 004 03 1855 minus 
36007 181 234 002. HA is NA. HP plus 



00189 36183 504 
We get a h an d 
Charlie, this 
S C 

CAPCOM 



36020 
over coming 
is Ho us t on . 

Ok ay , 
Okay , 



star 0 37 , up 2 5 7 righ t 29 
and 0 5G time is 02 3 0 8 28. 
No ullage. Go ahead. 



Sextant star is 26, 0734. Stand by one 
up, I'll get the rest in a minute. 

How do you read now. 
5 5 Gordie, go ahead. 

Shaft was 0 734 Trunion 151, Orsight 
minus 2 131 minus 16500 10932 34867, 
Serious and rigal 317 108 005. 



APOLLO 16 MISSION COMMENTARY U Jib 111 CST l:2 3pin 



23/2 



SC Okay, TLI plus 90 SPS/G&N 66973 minus 054 

plus 189 004 0 3 1855 minus 03562 plus 4 balls one plus 36007 
181 234 002 HA is NA. Plus 00189 36183 504 36020 260734 151 

Correction, that's up 257 right 29 minus 2131 minus 
3486 7 0230828. Serious and rigal 317 108 005. No 



S pe ak 
00800 



0 37 02 5 7. 
16500 10932 
ullage. 

CAP COM 
p L us 8 . 

S C 

CAP COM 
Go ahead. 
SC 

79 4 8 minus 16 5 

CAP COM 
base 6 predict, 22357. 
543 103730 35589. SEFT 
301 326 041 - 



Okay read back correct. Ready for lift off 



Double ET is 7948 minus 165 02206 . 



Ro ger . 
02206, and 
Ok ay , 



P37 for 
ready for 
read back 
Attitude 
atti t ude 



lift off plus 8, 
TLI. 

correct and TLI 



00800 



pad time 
179 113 000. Burn time is 
is 359 146 319. Extraction 



1 s 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h I lb 111 CST 1:33P 24/1 



CAPCOM 
aline 112 7 10 72 
S C 

CAPCOM 
S C 

CAPCOM 
S C 

CAPCOM 
P AO 

40 minutes ground 
SC 



041. 



146 319, extraction 301 326 
5720 and YAW is 001. Go ahead. 

Roger. Give me Delta VC again 
Delta VC is 103730. 
Okay, copy, TLI 22357. 
Standby 1, CHARLIE. 
Okay . 
And over. 

This is Apollo Control Houston 
elapsed time. 

Okay, 22357 179 113 000 54 3 103730 



R2 



at 1 hour 



35589 



359 



001. Over. 



146 319 301 326 041 1127 1072 5 720 
CAPCOM Readback is good. 

PAO This is Apollo Control Houston 

41 minutes ground elapsed time - 

SC The pass - what I saw was just super 

The other guys saw Ellington as we went over. 

CAPCOM How about that. Say, Charlie, 

update to the ordeal monitor numbers on page L-228 

Stand by. Can you speak? 
Okay, we got a last minute change. 



at 1 hour 



Got an 
and 29. 



SC 

CAPCOM 
Standby now. Sorry 

CAPCOM 
for a new vector, 

S C 

CAPCOM 



I would like Command Module to accept 



Okay, you got it. 

Okay, and words on the APS module. It 
appears to be operating, not completely normally, but adequately 
that we predict that it will be good through TLI and TD and E 



tha t 



without any change 
S C 

CAP COM 
L2-228 Charlie, 
pitch equal 17, 
SC 

CAP COM 
Change 

S C 

CAPCOM 
n umb e r 
box th e re . 

SC 

to 57 20 to 
pitch is at 

CAPCOM 
man ue ve r to 
theses . 

SC 



on 
to 



t i me 



FDAI 



1 p i t ch 



of procedure. Over. 
Outstanding prediction. 

Okay, and back to what we started earlier, 
opposite 56 minutes, change FDAI number 1 
change 17 to 16. Over. 

Okay, go ahead. It was changed to 16. 

And next page after the ordeal start 
to 57 20 rather than 57 even. 

Okay, ordeal start 57 20. 

That's affirmative and then I'm sure 

equal to 11 rather than 13 inside the 



Okay, at 
the ordeal 



5 7 min ute s , I'm 
and the insured 



changing that 
FDA number 1 



start 
11 . 

Okay, and then the blank under there - 
emission attitude is 107 as printed in paren- 

Ok ay , we copy . 



R2 



APOLLO 16 MISSION COMMENTARY h lib 1 11 CST 1:33P 2A/2 



CAPCOM That's good. And the CMC is yours. 

The uplink is complete. 

SC Okay, and we're back in block. 

PAO This is Apollo Control Houston, 1 hour 

44 minutes ground elapsed time. You heard that prediction 
on the APS, You heard the crews response, the prediction 
being that we could go through TLI and transposition docking 
with no change in procedures. The individual responding 
with the outstanding was spacecraft Commander John Young. We 
also received a TLI pad, and let me sort those numbers out 
for you rather quickly. Our time of Ignition for trans- 
lunar Injection burn is 2 hours 33 minutes 34.6 seconds ground 
elapsed time with a burn duration of 5 minutes 43 seconds. 
We predict a velocity at cutoff of 35 589 feet per second. 



SC 


Stand by. 


CAPCOM 


Go ahead, we're watching. 


SC 


Okay, Houston, standby for the logic. 


CAPCOM 


Ro ger . 


SC 


Okay, logic 1 coming on up, logic 2 on 


Mark . 




CAPCOM 


Okay, you're GO for pyro-arm. 


SC 


Roger. Thank you sir. 


CAPCOM 


I'd like to update a procedure, the 



up . 



APS module fall procedure, 1 step in that just in case the 
prediction is wrong and it does fail to - if you want to 
get that page out I'll give you a short update. 

SC Okay, Charlie's got it. 

CAPCOM Okay, Charlie. In the center of the 

procedure it says DSE command burn mode on, cross that line 
out, and the one below it that says if successful launch 
vehicle guidance lU, and after the line that says control 
PITCH and YAW with THC ROLL with RH C , add keep rate below 
210 degrees per second, PITCH and YAW .6 degree per second 
in ROLL to avoid fighting the other APS module. Over. 

SC Roger, We understand. 

CAPCOM Okay, that's it. 

PAO This is Apollo Control Houston at 1 

hour 47 minutes ground elapsed time in Mission Control. 
Flight Director Gene Kran2 is polling his flight control 
team as to our status for the trans lunar injection burn. 

CAPCOM 16, Houston. We're about a minute 

and a half to LOS. No further updates. Everything looks 
good. Canary should have their antenna fixed and we should 
be good as we go through their site. Over. 

SC 16, Roger. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 1:A3 CST 2 5/1 



PAO Apollo Control Houston. 1 hour 49 minutes 

ground elapsed time. We've had loss of signal with Vanguard. 
We are standing by now for acquisition with the Canary Island 
station. This should take place in less than 1 minute. At 
1 hour 50 minutes ground elapsed time this is Apollo Control 
H o us t on . 

CC 16 Houston to Canary. 

SC GARBLE. 

CC You're a little down in the mud but I think 

I can understand you. 

SC We heard you there before we got the signal 

straightened out (Garble). 

CC Roger. You are clear but weak. 

SC Okay, how do you read now, Gordy? 

CC Loud and clear, Charley. 

SC Okay our sigma strength is up to max now. 

CC Roger. 

CC 16, Houston. 

SC Go ahead. Over. 

CC We'd like the H2 tank 3 fans to AUTO. Over. 

SC Roger H2 tank 3 fans on AUTO. 

PAO This is Apollo Control Houston 1 hour 

54 minutes ground elapsed time. We're at a little over a minute 
away now from loss of signal with the Apollo 16 spacecraft. 
We'll standby and continue to monitor this is Apollo Control 

Ho us t on . 

CC 16 Houston about 30 seconds to LOS. We 

should have you through ARIA at 2:22 a couple of minutes later 
than shown in the flight plan, over. 

SC Roger, understand. 

PAO This is Apollo Control Houston. 1 hour 

55 minutes ground elapsed time. We've had loss of signal 

with Apollo 16 over Canary. The next ground station to acquire 
will be Carnarvon at approximately 2 hours 25 minutes ground 
elapsed time, however, we should pick up the Apollo 16 space- 
craft shortly in advance of that time with one of the ARIA 
aircraft which will be on station as Apollo 16 now proceeds 
toward the time of Ignition for the translunar injection burn. 
Our clock in Mission Control presently shows that burn time 
some 38 minutes away. At 1 hour 56 m.lnutes ground elasped 
time this is Apollo Control Houston. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kfl(>ll2 GST 2 : 12 26/1 



PAO This Is Apollo Control, Houston, at 2 hours 

and 19 minutes at ground elapse time and we're standing by 
in Mission Control awaiting acquisition with the Aucucuc aircraft 
who are presently on the station for this pass. It will be 
during this — following this acquisition and during this pass 
that we will have the translunar injection burn. Prior to 
the burn, the booster of the SIV-B will go into a time base 
six. This will be 9 minutes 38 seconds prior to the TLI burn 
and will represent the automatic sequence in the booster 
leading to the burn itself. We, presently show a TLI ignition 
time of 2 hours 33 minutes 35 seconds with the burn duration 
of 5 minutes 43 seconds predicted velocity at cutoff 3 5 89 feet 
per second with a Delta-V of 10389 feet per second. During 
the burn, itself, we will be monitoring data from the instru- 
ment unit on the SIV-B, this would be data such as velocity 
current altitude and a predicted amperge at time of shutdown. 
This data will come through us, through one of the Aucucuc aircraft 
We're at 2 hours 20 minutes at ground elapse time continuing 
to monitor. We show some 13 minutes away now from time of 
ignition and this is Apollo Control, Houston. 

We don't read anything you say but we'll 
all right. 

Apollo 16, this is Houston through ARIA over. 
By gosh, loud and clear, there. 



i t 



TRACKING 
transfer it if 
CAPCOM 
SC 

CAPCOM 
onboard? 
SC 

and 30 s econ ds 
PAO 
S C 

CAP CON 
PAO 

24 minutes at time 
than a minute away 



And so are you, John. How s everything 



We're 10 minutes 



for 



Everything looks good, here, 
the b urn . 
Apollo Control, Houston. 
For time base six. 
Roger. 

Apollo Control, Houston, at 2 hours and 
base six Started off on time. We're less 
now from the time of acquisition with 
Canarvan. Standing by and continuing to monitor, this is 
Apollo Control, Houston. 

SC Hey, Houston, the S-II sep light went o ut 

on time. 

CAPCOM Roger, very good. 

PAO Apollo Control, Houston, receiving data 

now. 2 hours 25 minutes ground elapse time. In the Mission 
Control Center, Houston, displays are being changed to show 
the dynamics of the upcoming translunar injection a little 

away at this time at 2 hours 25 minutes 
this is Apollo Control, Houston. 

Apollo Control, Houston, at 2 hours 26 minutes 
7 minutes away now. 

Now and the APS Module is looking good. 



more than 8 minutes 
ground elapse time, 
PAO 

ground elapse time, 
CAP COM 



APOLLO 16 MISSION COMMENTARY k /lb / 11 CST 2:12 26/2 



SC 16, Roger. Everything looks normal here. 

SC Roger. One question on the — cojnment on 

the primary loop does it look okay to you guys? 
CAPGOM Standby, Charlie, 

CAPCOM Roger, Charlie. EECOM is happy. 

SC Fine. 

PAO Apollo Control, Houston, a little over 

6 minutes away now from time of ignition, our manuever monitor 
displays mission Control show predicted velocity at shutdown 
of 35 593 feet per second. A predicted altitude at time of 
shutdown 167.7 nautical miles with a forecase apigee of 
266 879 nautical miles. Less than 6 minutes away now from 
time of ignition continuing to monitor. This is Apollo 
Control Houston. 

PAO In mission control center Houston, Flight 

Director Gene Kranz now going around the room for a go no 
go for TLI. We'll stand by. 

CAPCOM 16, Houston. You're go for TLI. 

SC Roger, go for TLI. 

PAO Apollo Control Houston. 3 minutes away 

now from time of ignition. Less than a minute away now from 
time of Canarvan LOS, The data will be monitored by the 
ARIA aircraft in the area. We're at 2 hours 31 minutes ground 
elapse time. This is Apollo Control, Houston. 

CAPCOM 16, Houston. We're about LOS Canarvan 

handing over to ARIA. We'll watch the booster for you. 
Spacecraft is all yours. 

SC Thank you, much. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hjie/ll CST: 2:25pm 



27/1 



PAO Apollo Control Houston, at 2 minutes away 

now from time of ignition for the translunar injection burn. 
We should be monitoring data from the instrument unit on the 
S4B. The ARIA aircraft has acquired Apollo 16. We're at 
2 hours 32 minutes ground elapsed time proceeding now toward 
the time of ignition for the translunar injection burn. 

PAO Booster reports the ullage engine have been 

turned on. We're at 2 hours 32 minutes ground elapsed time. 

PAO Mark, 1 minute away from time of ignition. 

Booster reports all systems proceeding normally. Less than 
a minute away from time of ignition. 40 seconds away now. 
Standing by at 2 hours 33 minutes groung elapsed time, this is 
Apollo Control Houston. Booster says we're go for the burn, 
16 seconds away. Booster systems engineer reports ignition on 
the third stage, the thrust looks good, he says. 

CAPCOM 16, we're showing good thrust on the S4B. 

S C Ro g e r . 

PAO Monitoring data from the instrument unit 

shows, a slow build up in our velocity. The velocity now read- 
ing 26,147 feet per second. Booster reports a good stable burn. 
Mark 1 minute into the burn. 

S C Go od. 

CAPCOM Roger, we're looking good here. 

PAO Instrument data shows velocity now reading 

at 26,932 feet per second. 

CAPCOM We've seen GO, the shift thrust looks good. 

PAO Displays Mission Control shows our tra- 

jectory right down the middle of the plot board, looking good 
coming up on 2 minutes. Mark 2 minutes since time of ignition. 

CAPCOM 16, Houston, at 2 minutes looking good. 

SC Roger. Right on in here. 

CAPCOM Roger. 

PAO 2 minutes 30 seconds since time of ignition. 

Velocity now reading through the instrument unit 28 840 feet 
per second. 

PAO 3 minutes since time of ignition, velocity 

now showing 29 956 feet per second. Booster systems engineer 
reports the burn performance looks real good. 3 minutes 30 
seconds since time of ignition, velocity now reading .30 152 
feet per second. Mark 4 minutes since time of ignition, 
velocity now 

CAPCOM Zero minus 3 now burn time as predicted 

5 43, Everything looks good. 

PAO Velocity now reading 32 073 feet per 

second, present altitude 119 nautical miles. 5 minutes since 
time of ignition, velocity 33 864 feet per second. Present 
altitude 143 nautical miles. 10 seconds to go, everything 
still looking good, 35 132 feet per second velocity. 



APOLLO 16 MISSION COMMENTARY k I \b 1 11 CST: 2:25 pm 



2 7/2 



SC (garbled) 
CAPCOM Roger. 

PAO Booster reports a shut down on time, 

guided cutoff. 

CAPCOM Roger, looks like normal shutdov^n and 

a guided cut off. 

SC That's what it looked like. We're looking 

at minus 10 on the Delta VC. 

CAPCOM Roger. 

PAO Apollo Control Houston at 2 hours 40 min- 

utes ground elapsed time, booster systems engineer reports 
everything looks good at this time. 

PAO We are about 4 minutes away now from 

acquisition of Apollo 16 out by the Hawaii tracking station. 
Standing by continuing to monitor this is Apollo Control 
Hous ton . 

CAPCOM 16, Houston, if it is convenient would 

you give us VI cut off. 

SC We got your light time, never mind. 

Bernie, we broke display on the (garble) 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/16 /72 2:35 CS T 28/1 



CC Okay, Ken we copied that, although you 

faded out at the end. VJe ' 11 be up on Hawaii here at 44. 
SC GARBLE. 

CC Charley you are just about unreadable. 

Copy that you are in POO and we're standby for Hawaii after 
this. 

PAO This is Apollo Control Houston at 2 hours 

44 minutes ground elapsed time standing by now for acquisition 
with Hawaii. 

CC Apollo 16 Houston through Hawaii over. 

SC Houston this is the most spectacular view 

that you can possibly imagine. 

CC Apollo 16 Houston through Hawaii over. 

SC GARBLE and your 5 by and it's the most 

spectacular view I've ever seen. 

CC Roger Charlie you are loud and clear. 

SC Okay, Houston the correct 02 is coming on, 

we're pumping her up right now. 

CC Roger. 

PAO Apollo Control Houston 2 hours 46 minutes 

ground elapsed time. We are now receiving radar data through 
Hawaii. We presently show Apollo 16 at an altitude of 
756 nautical miles. 

SC Okay Houston I'm going to OMNI CHARLIE. 

SC Gordle, you got Omni Charlie? Over. 

CAPCOM Roger, OMNI Charlie, Charlie. 

PAO This is Apollo Control - Houston, 2 hours, 

51 minutes ground elapse time. Our countdown clock at Mission Con- 
trol shows the time of separation is less than 13 minutes away 
n ow . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k I \k 1 11 GST 2:46 MC-29/1 



PAO Apollo Control, Houston, at 2 hours 54 

minutes ground elapsed time. Coming up now on that time when 
the booster initiates its maneuver to seperatlon attitude. 



PAO 


We presently show Apollo 16 in 1974 


nautical miles. 






ORION 


And we are maneuvering to the at 


t i t ude 


r i gh t now. 






CAP COM 


Okay . 




CAP COM 


16, we see the cabin Is up to 5. 


7 n ow . 


ORION 


Roger. Thank you sir. 




CAP COM 


We'd like OMNI Delta, please. 




CAPCOM 


OMNI Alpha now, please. 




ORION 


Say again. 




CAPCOM 


Give us OMNI Alpha, Charlie. 




ORION 


Ok ay , you got it. 




CAPCOM 


Request OMNI Bravo now, please. 




PAO 


Seven minutes away now from time 


of 


s eperation . We 


presently show Apollo 16 in altitude 


of 



2620 nautical miles. We are at 2 hours 58 minutes ground 
elapsed time. Flight director Gene Kranz , is taking a check 
with his flight control team, for a go, no go, for trans- 
position docking and ejection of the lunar module. 

CAPCOM Like OMNI Charlie, please. 

ORION Roger, OMNI Charlie. 

PAO Apollo Control, Houston, at 2 hours 

59 minutes ground elapsed time. We presently show Apollo 16 
at 2800 nautical miles and velocity at 269 31 feet 
per second. 

CAPCOM 16, Houston, the booster is in attitude 

of stable. You have a go for T & D. 

ORION Roger. We'll give you a call just before 

we get off, 

CAPCOM Okay. 

PAO This is Apollo Control, Houston at 

3 hours ground elapsed time. Present altitude of Apollo 16 
3,004 nautical miles. Velocity now reading at 26,408 feet 
per second. We are 4 minutes away now from time of — pro- 
posed time of seperation. This is Apollo Control, Houston. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k j \h 1 11 2:56 CS T MC-30/1 



PAG This is Apollo Control Houston at 3 hours 

2 minutes, ground elapse time. Apollo 16's present distance 
away from Earth now 3388 nautical miles, 

SC Okay, Houston, we're getting ready to arm 

the pyros, are you ready? 

CAPCOM Roger, we're ready. 

SC Okay, pyro arm A is armed. And B is armed. 

CAPCOM Roger. 

CAPCOM Now, that looks good. 

PAO This is Apollo Control Houston at 3 hours 

A minutes ground elapse time. Apollo 16 presently at a height 
o:: 3703 nautical miles. 

SC Okay, we're coming up on 59 40 mark. 

CAPCOM Roger. 

PAO Three hours 5 minutes ground elapse time. 

We've had small sep burn. 

SC Talkbacks are still gray, you can finish 

pitching around now. 

CAPCOM Roger, John, 

PAO Apollo Control Houston at 3 hours 6 minutes 

ground elapse time. Apollo 16 presently at a distance of 
4017 nautical miles. 

SC Okay, Houston, you got the high gain? 

CAPCOM Roger, Charlie. 

PAO Apollo Control Houston at 3 hours 8 minutes 

now on ground elapse time. We show Apollo 16 at a height of 
A435 nautical miles. 

SC Okay, Houston, you ought to be getting some 

TV. 

CAPCOM I haven't gotten it yet, we're working on 

i : , 

PAO Apollo Control Houston, 3 hours 10 minutes 

at ground elapse time. The black and white picture is beginning 
tD come in now. Television is now showing - 

CAPCOM I got a picture now Charlie and it looks 

real good. 

SC Man, it just looks like a picture book 

from up here Gordo. We must have a zillion particles along 
with us . 

CAPCOM Rog, John, we see the particles and great 

p ic t ur e [ 

SC Hey, is the zoom in too much Gordo let me 

take it out a little bit. 

PAO Apollo Control Houston at 3 hours 11 minutes 

ground elapse time. Apollo 16 now 4851 nautical miles away from 
the Earth. 

SC Panning right now. 

CAPCOM Super! 



APOLLO 16 MISSION COMMENTARY 4/16/72 2:56 GST MC-30/2 

SC Gordo, it looks like Orion is hanging in 

there pretty well she looks great. 

END OF TAPE 



APOLLO 16 MISSION COMMENTARY Jie / 12 CS T 3:06 31/1 



SC Super. 

SC Well it looks like Orion is hanging in 

there pretty well. Looks great. 

CAPCOM Looks the same to us. 

PAO Apollo control, Houston. 3 hours 

13 minutes ground elapse time. Apollo 16 presently 
5195 nautical miles away from the earth. 

PAO Apollo control, Houston. 3 hours 

15 minutes ground elapse time. Apollo 16 now 5536 nautical 
miles away from the earth. 

CAPCOM Good afternoon, Houston. 

SC Roger, looks like a real smooth join up. 

SC Air flow. Okay, we're captured there, 

H ous t on . 

CAPCOM Roger. 

PAO Apollo 16 reporting that they have cap- 

tured the Lunar Module. We're at 3 hours 16 minutes ground 
elapse time. We show an altitude of 5 706 nautical miles. 

CAPCOM Jim is taking some time in dressing this 

tiling up to get these attitudes right. 

S C Ok ay . 

PAO Apollo control, Houston. 3 hours 

19 minutes ground elapse time. Apollo 16 ' s present distance 
from earth 6 246 nautical miles velocity now reading 
21 466 feet per second. 

END OF TAPE 



APOLLO 16 MISSION COMMENTARY GST 3:16 MC-32/1 



ORION 
CAP COM 
S C 

the latches. 
S C 
PAG 

Apollo 16 at 68045 
CAP COM 
S C 

CAP COM 
cycling about once 
you a mark at which 



Ok ay 5 Houston we're hard docked. 

Roger. Golly (garble) 

And there is no question when you 



get 



Yep. Roger, Cap. 

3 hours 22 minutes ground elapsed time 
nautical miles away. 
John this is Houston. 
Go ahead, over. 

We liked — noticed the mixing valves 
every 10 15 seconds. We'd like to give 
time we want you to put the t ri collar 



VAP 



capped in valve in manual and try to catch the flow rate at 
appropriate setting. I'll give you kind of a countdown on 
the mark here. 

SC 

CAP COM 
down. John now all 
that it has stopped 
already did you? 

SC 

CAPCOM 
that. Standby- 
auto see if that 

S C 

seconds and then 

CAP COM 
by to put it in 

S C 

the nail . 

CAPCOM I was a little slow on the now, but 

leave it there for now and press on with the normal p ro- 
ce dures . 

Houston, four, we turned the T.V. off 
you a picture of the Earth. 

Okay, I'll appreciate that. 
Apollo Control, Houston, at 3 hours 
27 minutes ground elapsed time. That view of Earth from 
a distance of 7500 nautical miles. 



Yes, we've been noticing that ourselves. 
Okay, flowrate's high and starting back 
of a sudden we've stopped seeing it, 
cycling. You didn't throw the switch 



That's negative we are waiting your mark there 
Well it's just hung up. Just as I said 
We like you to cycle some manual back 
starts it back down. Over. 

Okay, you' 
back to auto. 

Ok ay . Ok ay , it's 
manual. Ready, now. 

Okay, okay you got it right there 



re in manual for about 2 
coming down now. 



t o 



Stand 



on 



w e 



S C 

want to give 
CAPCOM 
P AO 



CAPCOM 
Southwes te rn 
S C 

It's out his 
S C 

CAPCOM 
S C 



Very nice picture, Charlie, we can see 
United States, lower California. Very nice. 

Ken's doing all that good work for you, 

w indow . 



Gordy, is that color okay for you? 
Very nice. Ken. Beautiful color. 
I'll bet it's good. But you just can't 
believe how beautiful it is. See the reds in the desert 
down there and Southern United States, Northern part of 
Mexico. And from here you see the Great Lakes and the state 
of Florida out there. And it's just absolutely something. 
SC We're going to go back to work 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h Jib 1 11 CST: 3:23 



33/1 



SC Andwemightbeable togetyouanS-IVB 

loiter on if you got room to get back on the stuff. 

CAPCOM Apollo 16, Houston, we'll extend the time 

or. commercial TV lines here if it looks like we'll get some 
good shots on the S-IVB. 

SC Okay, I really haven't worked out the 

angle to tell you exactly how the sun is going to be. But 
I have an idea we'll see it pretty nicely from here. 

CAPCOM Okay, we'll stand by for it. 

SC Just went to auto on 02 T t o 3 Houston, 

We are down to that part in the post dock and check list. 

CAPCOM Okay. 

PAO This is Apollo Control Houston, 3 hours 

31 minutes since ground elapsed time. Apollo 16 is presently 
at a distance of 8240 nautical miles away from Earth. Veloc- 
ity now reading 19 445 feet per second. 

SC Okay, Gordy, we're down to 2 10 I mean 

correction 2.0 on the DELTA P and we start an hourly check. 

CAPCOM Roger. 

PAO This is Apollo Control Houston, at 3 hours 

36 minutes ground lapsed time. We presently show Apollo 16 
at a distance of 8997 nautical miles away from the Earth. 
Velocity now reading 18 818 feet per second. Very little 
conversation with the crew at this time as they are in 
the process of removing the tunnel hatch and going through 
their check list prior to separation and ejection of the 
lunar module. We are at 3 hours 37 minutes continuing 
to monitor. This Apollo Control Houston. 

SC 4 

CAPCOM Roger, 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k/lt/ll 3:33 PM CST MC-34/1 



CAPCOM 16, Houston, in about 30 seconds a couple 

of non-propulsive vents will open on the booster. 
SC Okay, thank you. 

PAO This is Apollo Control Houston at 3 hours 

40 minutes at ground elapse time. The booster systems engineer 
reports the S-IVB non- p r op uls i ve vent has begun. We're at 
3 hours 40 minutes continuing the monitor and this is Apollo 
Control in Houston. 

SC Okay, Houston, the hatch is out. 

CAPCOM Roger. 

PAO Three hours 40 minutes, ground elapse time. 

This is Apollo Control Houston. Charlie Duke reports the hatch 
is out. We presently show Apollo 16 at a distance of 9739 
nautical miles from Earth. Velocity now reading 18 2 77 feet 
per sec on d. 

SC Houston, it looks like number 10 latch is 

indeed locked let me start by saying all of the latches are 

locked. Number 10 is over the rank, but the handle isn't all 
the way up flush and we're just going to leave it alone. Thought 
we would just tell you about it. 

CAPCOM Okay, Ken. 

PAO This is Apollo Control Houston at 3 hours 

46 minutes of ground elapse time. Apollo 16 presently at 
10 617 nautical miles away from the Earth. 

SC Okay, Houston, the connectors are connected 

and we got LM power to CSM and system test is okay. 

CAPCOM Roger. 

SC Yes, Gordy, the old Rover is right where it 

s upp o s e to be. 

CAPCOM That's good. 



END OF TAPE 



AEOLLO 16 MISSION COMMENTARY h I 1 11 CS T 3:43 MC-35/1 



I'd 

the 



Houston, 16. Capcom this is 16. 
Roger, go ahead. 

Okay, Gordy, when we ptiched around 
you a little bit about something we saw on 
were coming around about 30 or 40 feet out 



ORION 
CAPCOM 
ORION 
like to tell 
LM, When we 

we; had a lot of white particles, looked like it was coming 
out from around the lunar module. Quite a number of them 
and as we got closer it looked like to me that the primary, 
most of the particles were coming between the ascent pro- 
pellent tank over Quad 1 and this OMNI antenna. It looks 
like there was being jetted out from either some out gassing 
or something, and we assumed it's mylar, but not convinced 
o J: that. 

CAPCOM 
ORION 
seemed like there 
CAPCOM 
P AO 



it is j us t 



We copied that, Charlie. 
The only reason we comment 
was an awful lot of them. 
Okay . 

Apollo Control, Houston, 3 hours 50 
minutes ground elapsed time, making that report was lunar 
module pilot, Charles Duke. In his discussion with Capcom, 
Gordon Fullerton, here in Mission Control. 



ORION 

with the launching. 

CAPCOM 

ORION 

CAP COM 

ORION 
Py ro B , mark . 

CAPCOM 



Okay, Houston, we're ready to precede 

Okay, we're standing by. 
There's 2 logics on. 
Your go for pyro 1. 

Roger, Houston. Here comes pyro A, mark. 
Okay, they look good. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kllblll CS T 3:53 36/1 



Houston, we're ready to get off if you 
for e j ection. 

off Ho us t on . 



Your go 
Okay . 

Ok ay , we're 
Ro ge r . 

Apollo control Houston. 3 
Charlie Duke reporting their 



hours 
off the 



SC 

guys are re ady . 
CAPCOM 
SC 
SC 

CAPCOM 
P AO 

59 minutes that's 
booster. 

SC 

and we'll tell you 
CAPCOM 

S C 

Ejection check list 

CAPCOM 
unable to get lines 
however, we're going 
playback, over. 

SC We'll do it for you. 

^AO This is Apollo control Houston. k hours 

5 minutes ground elapse time. Our displays presently show 
Apollo 16 at 13 310 nautical miles away from the earth. 
Velocity now reading 1 683 feet per second. 

SC Houston, Casper is out of his bag and 

we got the SIVB in the window and the TV is transmitting 
pictures of now and if you want to do your maneuver with it, 
we'll well clear. 

CAPCOM Okay, we copy a go for the S-IVB maneuver. 



Okay, Houston. We're doing our maneuver 
as soon as we have a visual. 
Okay . 

Okay, Houston. A post LM injection, 
i s comp 1 e te . 
Roger, and for 
from Goldstone 
to record any 



your information we're 
to Houston for live TV; 
TV you give us for later 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hlld/ll GST; 4:03 pm 37/1 



CAPCOM Okay, we copy at GO for S-IVB maneuver. 

SC That's the editing maneuver we're taking 

ab out . 

CAPCOM We'll start the maneuver about 4:10 GET 

SC Okay. 

CAPCOM Apollo 16, your TV down link looks good 

out at the site, however, we can't see it here in Houston. 

SC Okay, we'll still adjust them then, all 

good things. 

CAPCOM Okay. 

PAO Apollo Control Houston. We're 4 hours 

10 minutes ground elapsed time. That was Ken Mattingly 
responding to CAPCOM Gordon Fullerton. We now show Apollo 16 
at: a distance from Earth of 14 005 nautical miles with a 
velocity reading 15 751 feet per second. Booster systems 
engineer reports the yaw maneuver is in progress. 

CAPCOM Mean maneuver, attitude maneuver is in 

pirogress now. 

SC g > we can see it maneuver. I tell you 

they never make movies like these. 

CAPCOM I would like auto track on the high gain 

p ]. eas e . 

SC You got it. 

CAPCOM Thank you. 

SC Gordy, we lost the monitor picture and 

w(! are going to try to power the TV set down and we are going 
to check all connections. Got a lot of horizontal lines and 
you can't really make out the images. It started out Okay 
and while John was taking a picture the monitor picture went 
out. So we are going to take a look at it. It has a whole 
bunch of horizontal lines. Looks like maybe multiple images, 

CAPCOM Suppose that was a sight. Stand by. 

PAO Apollo Control Houston. 4 hours 14 minutes 

That was command module pilot Ken Mattingly talking about the 
television. We now show Apollo 16 at a distance of 14 416 
nautical miles, velocity now reads 15 543 feet per second. 

CAPCOM 16, Houston, the maneuver is complete. 

Wc! are standing by for your GO for the evasive burn. 

SC Okay, stand by one. 

SC Okay, Gordy, we are all set. It looks 

Ij-ke it's almost 90 degrees to us. 

CAPCOM Okay, on the TV problem, we had a good 

pd.cture out at the site there at the first, but then we 
started losing signal strength which doesn't really tell us 
whether anything is wrong with your monitor set or not. 

SC Okay, we are going to take pictures like 

it's working, you can check it out later. 



APOLLO 16 MISSION COMMENTARY CST: 4:05 pm 



37/2 



CAP COM Okay. 

SC And we are all set. 

CAPCOM Roger. 

PAO Apollo Control Houston at 4 hours 16 min- 

ites ground elapsed time. Booster systems engineer reports 
he will start with the evasive burn of the S-IVB at 4 hours 
18 minutes ground elapsed time. 

CAPCOM 16, H o us t on . Jerome Sound says they are 

getting a good picture and so your trouble was worth the 
effort there and we'll start the evasive burn at 4:18 even. 

SC Okay, Gordy, thank you. We got another 

spectacular view of the Earth down here, the polar ice cap 
and we can see the whole sphere and the United States is 
absolutely spectacular. 

CAPCOM How about that? 

SC And the other side we got a crescent 

Moon. In fact you can see Lake Meade, Gordy, very clearly. 
CAPCOM No kidding? 

PAO Apollo Control Houston, 4 hours 17 minutes 

ground elapsed time. Apollo 16 now 15 0 39 nautical miles 
away from the Earth. Velocity now reading 15 272 feet per 
s e con d . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h US 1 11 4:13 PM CST MC-38/1 



PAO 
PAO 

The booster systems 
evasive burn that's 
S C 



Velocity now reading 15 2 72 feet per second. 
Apollo Control Houston A hours 18 minutes, 
engineer indicates he has Initiated the 
1 minute 20 seconds in duration. 
We' can see her moving away now Gordon, and 
she's just slowly picking up a little speed there. The only 
way you can tell it's moving is against the particles in the 
background. I don't think you can see those on TV, but it 
looks like there's a million stars out behind the S-IVB as it 
moves on. 

CAP COM 
CAPCOM 
S C 

old Apollo 16 crew 
and appreciation to 
Center that gives such a phenomenal ride. Not to mention Boeing 
Ccmpany on the first stage. North American on the second, McDAC 
on the third, IBM on the lU. It was superb all the way 

CAPCOM Okay, John, I'll speak to them, thank you. 

PAO Apollo Control Houston at 4 hours 20 minutes 

ground elapse time. That was spacecraft commander John Young 
expressing his appreciation of the Saturn V team. 

We felt — we know it was leaving and we're 
have to use any of that training he gave us. 



Roger, John. 

Now the evasive burn is complete now. 
And Roger, as she moves out of sight the 
really would like to express their thanks 
the guys at the Marshall Space Flight 



SC 

svire glad 



we di dn ' t 



CAPCOM Okay, we'll sure do that. He's just about 

to walk out the door. 

PAO Four hours 21 minutes ground elapse time. 

Mike Waush has worked with the Apollo flight crews in the train- 
ing of these crews for the powered phase of launch and also — 

SC Out there looks like Alaska - up maybe a little 

fc.rther north is a pretty good swirl pattern — looks like a 
pretty good storm up there. 
CAPCOM Roger. 

PAO During the powered phase of flight Mike Waush 

is always positioned right next to the capsule communicator. 



N ow 16 



CAPCOM 
CAP COM here . 

AUX CAPCOM 
e\'erything works 

SC 

AUX CAPCOM 
S C 

erjoyed working with you 



, here is a word from the auxiliary 

hope 



Good luck you fellows, 
out alright. 
Kind works 



an d 



Mike. 



AUX 
G c o d bye 
SC 
PAO 



CAP COM 
and good 



take it easy 
Thank you. 

Thank you for all of your trouble. We sure 
was sure my pleasure John, thank you a lot 



Say again? 



It 
luck . 

Thank you now. 
Apollo Control 



Houston 4 hours 22 minutes 



APOLLO 16 MISSION COMMENTARY hlie/ll 4:13 PM CS T MC-38/2 G.C.f, f.'JJ^.'de 



PAO The voice you just heard was Mike Waush 

who is being transferred to the Ames Research Center. We are 
at 4 hours 23 minutes ground elapse time. We show Apollo 16 
at a distance of 15 70 7 nautical miles away from the Earth. 
Velocity now reading 14 972 feet per second. 

SC Again the S-IVB has drifted maybe half a 

mile away now, so we went ahead and turned off the tube. 

CAP COM Okay. 

CAPCOM John, just before you turned the TV off, 

was the monitor still giving you trouble? 
SC That's affirmative, 

CAPCOM Okay, thank you. 

SC I guess it's about time for little VERB 49 

to the B 52 attitude. How does that suit you? 
CAPCOM Sounds good. 

SC Gordy, I can't get over the view of that 

Earth. None of the pictures just do it justice -- absolutely 
b eautif ul. 

CAPCOM We're kind of getting the idea that you're 

i mp res s ed . 

SC Man, the thing about it Gordy, is that all 

of the Southern United States, Mexico, and Florida, and Cuba, 
and the Virgin Islands down that way -- they're all clear of 
clouds, it's just fantastic[ 

CAPCOM Did you take some good pictures? 

SC Got some the way we're going we may have 

to get a reload before we get to the Moon. 

SC As a matter of fact, you can see as far north 

as Lake Michigan and Lake Superior. 

CAPCOM Sounds great! 

SC And all the way down past the Yucatan and into 

the Central America. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k ] \ii 1 11 CST 16:23 MC-39/1 



SC Houston we've got the cabin back up some 

new and our LM- CM Delta P gauge is reading .6. And that is 
probably due to the Delta on the cabin. And the 02 flow 
high light is going out, so things are getting back to normal, 

CAP COM Okay. 

SCAnd, And, Houston, we've done a LM- CM 

Delta P, and the time 4 hours and 30 minutes, we had a plus 
. 6 . 

CAP COM Roger. 

ORION Houston, we're going to take the waste 

storage valve to vent this time. 
CAPCOM Roger, Ken. 

PAO Apollo Control, Houston, at 4 hours 

37 minutes, ground elapsed time. Our space digitals dis- 
play in Mission Control, presently using the Moon as a re- 
ference and we show that Apollo 16 is 174,639 nautical miles 
away from the Moon. At 4 hours 37 minutes, continuing to 
monitor, this is Apollo Control, Houston. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k I \h 111 CST 16:33 40/1 



Don't know if you can see 



w e 



1 1 



40 



SC 

charging battery 

CAP COM 
like you to dial 
an d 9 8 an d go to 



16 , Ho us t on 
ve started the locks dump on the 
We lost it a little while ago, 
Rog. 

Apollo control Houston. 4 hours 



S-IVB . 
Gordi e 



CAPCOM 
or not, but 
SC 

CAPCOM 
PAO 

minutes ground elapse time. The booster systems engineer 
reports that the locks dump has been completed with the 
S-IVB. We're at 4 hours 41 minutes ground elapse time con- 
tinuing to monitor. This is Apollo control, Houston. 

Houston, are you ready for us to start 

B ? 

Okay we're Go for battery charge B and we'd also 
in the flight plan high gain angles minus 47 
REACQ . 



SC 




Okay, you got the angles and your going 


to REACQ. 




SC 




Ho us ton , 16 . 


CAPCOM 




Go ah e ad . 


SC 




Okay, we got Bat B charging and it says 


volts should be 


37 


1/2 to 39 1/2 and I'm looking at 33. 


CAPCOM 




Okay . 


CAP COM 




Charlie, we got - we figured about 


8 1/2 hours out 


of 


that battery so it will be awhile before 


the voltage gets 


b 


ack up and EECOM thinks that's okay. 


SC 




Ok ay , fine. 


S C 




Houston, we got 3.4 on 7A we going to vent 


battery to zero 


i f 


that ' s okay . 


CAPCOM 




S t an d by. 


CAPCOM 




We'd like you to hold on that for a 


mln ute . 






S C 




Your too late we just vented it. 


SC 




Okay, it's reading about 2 tenths right 


n ow . 






CAPCOM 




Roge r . 


S C 




Say again, 4 tenths. 


CAPCOM 




4 tenths . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k j \^ m CST 16:43 GET 4:47 MC-41/1 



PAO Apollo Control, Houston, 4 hours 15 

minutes ground elapsed time. The space digitals display is 
still using the Moon as a reference. We presently show Apollo 16 
at a distance of 172--173,082 nautical miles away from the 
Moon. Continuing to monitor, this is Apollo Control, Houston. 

SC Houston, we've got a couple of comments 

on the EMS for CMC, whenever Reese has a break. 

CAPCOM They're all ears, go ahead. 

SC That must look funny. Okay, we been 

running an all bias test here for well since we 
got in orbit and each time the check list calls for it. The 
first one we found it in hundred checking, checking gain 2.5 
and just before docking it got 2.6 and I Just ran another 
one and I had 2.8 and I don't really know what you can do with 
that, but I just thought I'd go ahead and tell you about that 
magnitude of what we're looking at. Okay and out first rough 
guess of how the SCS GDC system is performing it looks like 
it's well within spec, in PITCH, YAW and ROLL. (garble) as 
dri f t . meas uremen ts go. 

CAPCOM Okay, counting, John, we get that. 

CAPCOM 16, Houston, whenever you're ready, we're 

ready to load the GDC REFSMMAT. 

SC Okay, you have POO and ACCEPT. 

CAPCOM Okay. Ken, sorry about that we didn't 

get coordinated here. We don't have an uplink site, so go 
back to blonk until after 5 hours and we'll try it again 
th en . 

SC Alrlghty. We're backing up to (garble) 

the block. And we're going to kind of hanging up here for 
awhile any how while we get our suits off and if it turns 
out to be a pretty interesting operation (garble) 

CAPCOM Roger. 

SC I'll tell you, Gordy, there were some 

sights out there that were really something. One of the, 
one of the things, most things happened like most people 
said they would. But there were a couple of things that 
we had never seen or heard anyone even mention them, maybe 
they been there all along. One of the things that was really 
nifty was while we were in power flight both in later stages 
of the boost and during the TLI burn, there were particles 
that I could see out the windows, that were going past us in 
the plus X direction and I kept thinking that, that was an 
optical illusion, and I kept going back and looking at it 
again and sure enough. And these were after we were in steady 
state it wasn't aroung any kind of staging event or anything 
that I was aware of. 

CAPCOM Oh, how about that one, haven't heard of 

that one before. 



APOLLO 16 MISSION COMMENTARY CST 16:43 GET 4:A7 MC-41/2 



SC Then when we, when we scooted out here 

and you started your n on p r op uls i on bend, we could see, first 
it just looked like it was a little mist around the outside 
when you looked at the sun. And then the sun hit it at such 
an angle that you started getting a spectral reflection that 
looked like a rainbow out over the LM. And then after that 
you could look out my number one window and apparently the 
lighting was just (garble) so that you had a heavy appearance 
of light streaming off into a point source and infinity. 
There was a little blank spot in it and it what looked like 
the origin, then all these streaks were coming back towards 
you like you were right in the center of a cone and these 
things would change color, they would go to a light purple, 
then they had a little sandy color to them, that was another 
one that I don't remember hearing before and maybe it was 
just the lighting, but it sure was pretty. 

CAPCOM Rog. Enjoyed the description. 

SC And I'll tell you, you can't wait to 

many years to make this worth it. 

Ro ge r . 

Gordy, on that boost, that S-IC is a 



real 
that 



CAP COM 
S C 
f re i gh t 



train. And I'll tell you boy, I can t get over 



CAPCOM 

S C 

s taging. 

CAPCOM 
went out of sight 

P AO 

CAPCOM 
SC 

his s ui t- o f f . 
CAPCOM 
PAO 

elapsed time. Most 
Ken Mattingly, how-- 
S C 

to be sure and take 
as we went over which is something we probably would have 
forgotten or never even thought of. 



Roger. 

See that thing on the T.V. up through 

I didn't watch it all the way till it 
I'll have to check here. 

Apollo Control, Houston 

We saw an even tower jett. 

Good show. John is in the middle of 



Okay . 

We're at 4 hours 58 minutes, ground 
of that long discription coming from 

Suggestion we wrote in the flight plan 
a look at the fires out there in Africa 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h/ltlll GST 16:53 42/1 



SC Beautiful as everybody has said they 

could be. They are just all over the place. All these little 
yellowish red dots down there. And it looks like some low 
overcast in parts of the area or maybe from our altitude, 
maybe it was a high overcast. It looked like looking in 
the lights of a city through fog and then there were others 
tnat were clear. Something well worth remembering to look for. 

CAPCOM Roger. I'll be sure to remind Ron to 

look for that one. 

SC I tell you, God didn't equip us with 

e:iough eyes to see everything there is to see in the first 
ho ur . 

CAPCOM Rog. 

PAG Apollo control, Houston. 4 hours 

5 9 minutes. That last remark coming from Command Module 
pilot Ken Mattingly. Our space digital display still using 
the moon as a reference. We show Apollo 16 172 048 nautical 
miles away from the moon. 

SC Gordy, it looks like this whole operation may 

take us longer than we guessed. Is there any thermal con- 
straint on getting 52 attitude to go on to those other atti- 
tudes? Looks like (Garble) . . . 

CAPCOM I'll check on that Ken. 

SC ... wondering if that's something we 

ought to keep in mind. 

CAPCOM Okay, we're about to hand over here. I'll 

check on that and come back through Hawaii. 

SC Okay, thank you. 

CAPCOM 16, we through Hawaii, now. And your 

scheduled in this attitude through 7 hours at least so no 
problem thermally and your not even due to do the P52 for 
another half hour, so your plenty ahead. 

SC Okay, that P52 we're going to cut to 

see point here pretty soon to see - you want us to do that 
than we'll pick up the suit doffing after that or I'd just 
as soon go ahead and get all the suits out of the way and we 
can do the 52 on schedule or we can do it after we get the suits 
off. Does it make any difference to you folks? 

CAPCOM Let me check. 

CAPCOM If that's what you would like to do why 

don't you go ahead with the - finish up the suits no problem 
slipping the 52 a little bit. And we'd like go and accept 
with that uplink. 

SC Okay, there is go and accept. Is Fredo 

still around there? 

CAPCOM No, he went home about a half hour ago. 

CAPCOM 16, Houston. The computer is yours. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY CST: 17:03 GET 5:07 43/1 

PAG This is Apollo Control Houston at 5 hours 

10 minutes ground elapsed time. Our displays still show 
the Moon as our reference so we show Apollo 16 at a distance 
of 170 878 nautical miles away from the Moon and we've had 
no conversation for a while with the crew of Apollo 16. We 
suspect they are in the process of doffing their space suits 
and later preparation for their eat period which is scheduled 
to begin at 6 hours ground elapsed time. 5 hours 10 minutes 
ground elapsed time this is Apollo Control Houston. 



END OF TAPE 



APOLLO 16 MISSION COKMENTARY k lid / 11 CST 17:13 44/1 
DEAD AIR 
END OF TAPE 



APOLLO 16 MISSION COMMENTARY h]\i>lll 17:23 CST 5:27 GET MC-45/1 



PAG This is Apollo Control Houston at 5 hours 

30 minutes ground elapse time. Our space digital display now 
using the earth reference. We show Apollo 16 at 23 892 nautical 
miles away from the Earth. Velocity now reading 12 295 feet 
per s econd. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hjX^Ill CST 17:33 GET 5:37 46/1 



PAO This Is Apollo Control Houston at 5 hours 

44 minutes ground elapsed time. We presently show Apollo 16 
at a distance of 25 488 nautical miles away from the Earth. 
Velocity now reading 11 945 feet per second. Very shortly 
in Mission Control we will have the change of shift - or 
shift change over of the Gene Kranz team of flight controllers 
will be replaced by the Pete Franks team of flight controllers. 
We're at 5 hours 45 minutes and continuing to monitor. This 
is Apollo Control Houston. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hjlb/ll 17:43 CST 5:47 GET MC-47/1 



PAO This is Apollo Control Houston, 5 hours 50 

minutes ground elapse time. We presently show Apollo 16 at 
a distance of 26 143 nautical miles away from the Earth. And 
traveling at a velocity of 11 79 6 feet per second. We're con- 
tinuing with our shift turnover in the Mission Control Center 
at the present time. Pete Franks' team of Orange Flight Con- 
trollers coming aboard replacing the Gene Kranz team of 
Light Flight Controllers. We estimate the start time of our 
change in shift news conference 6 to 6:15 p.m. Central Standard 
Time. The news conference will involve Flight Director Gene 
Kranz. CAPCOM astronaut Gordon Fullerton and booster systems 
engineer Frank Van Rensselaer. This news conference will be 
held in the news center briefing auditorium -- in the news 
center briefing auditorium instead of the large public affairs 
auditorium. We are at 5 hours 51 minutes ground elapse time. 
This is Apollo Control Houston. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h I \h 1 11 CS T 17:53 GET 5:57 MC-48/1 



SC 
up now. 

CAP COM 
you didn't bear me s 
SC 

about an hour for me 



aa d 



It 



s t ow th e m . 
CAP COM 
CAP COM 
SC 

CAP COM 
coming on with a goo 
and a bunch of Fligh 
free to do some s ten 
6 hours, hope the re 

SC 

and the guys down in 
CAP COM 



Hello, Houston, 16, John and I are back 

Roger. That uplink is complete in case 
iometime ago. The computer is yours. 
Okay, we're in block and it took us 
and Charlie to climb out of those suits 
really something. 
Rog. 

16, H ous t on . 
Go ahead, Gord. 

I'm going to hand over to Pete here, he's 
d boost there. He's got a bunch of P-37 pad 
t Plan updates for you when he gets somebody 
ographlc work there. Enjoyed the first 
St of it goes as well. 

Gordon, that was beautiful. Tell flight 

the trenches that it was super. 
Okay . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k I \i) 1 11 CS T 18:03 49/1 



copy 



SC Okay, Houston 16 here we're ready to 

the flight plan updates. 



CAPCOM 

SC 

S C 

CAPCOM 
waste stowage vent 
stowage vent valve 

S C 

valve close. 
CAPCOM 
S C 

CAPCOM 
expe riments 
filter. UV 



Roger, 16 at i: 

S tan d by . 

Okay, go ahead, 

Roger, at 11 he 
valve close and 
close . 

Okay, copy add 



Okay, go ahead. 
Roger, then we' 
EVA check list having t 



we re g oing 
that on 
S C 

that check list 
CAP COM 
S C 
SC 



h 


o urs 


in the 


ur 


s we 


w an t to 


at 


12 : 


15 we wi 


at 


12 : 


15 waste 


te 


i t 


at 11. 


ve 


got 


ch an ge 


o 


do w 


ith the 


ot 


mee 


t th e s p 


an 


ge s 


to th e e 


th 


e ch 


eck list 



.1 add waste 
s towage vent 



to the CSM 
ult raviolet 
ects and 



that we don't have 



several different pages in 

Yes, we'll wait on 
out yet, pete . 

Okay, and I've got P37 block data, 
by. 



data. 

CAPCOM 
minus 165 046 40. 
SC 

165 046 40 , over. 
CAPCOM 
S C 

CAPCOM 
S C 

CAPCOM 
it looks pretty 
PAO 



S t an d 
Okay, Pete go 

Okay, liftoff 

Roger, copy. 



ahead with the P37 block 
plus 15 it's 015 00 5493 
015 00 5493 minus 
correct John. 



i t 



Roger, that' s 
Is that all? 
I (garble) that's all. 
How's midcourse looking? 

Stand by, one. We're still looking at 
good right now. 

This is Apollo control. We've now com- 
pleted our shift hand over in Mission control. Flight 
Director Pete Frank and the orange team of flight controllers. 
The capcom on this shift is astronaut Donald Peterson. We 
have a change of shift press briefing scheduled to begin 
momentarily in the MSG news center briefing room as is our 
normal practice during change of shift briefings we will have 
the air to ground line down and we'll be recording any con- 
with the crew for playback 
The coming 8 hours or so 
for the crew. The booster 
of all activities with the 
of the S-IVB. That vehicle is now gradually separating from 
the spacecraft tumbling slowly. This is to maintain the 
proper thermal equilibrium and also to kind of neutralize out 
any changes in velocity added or subtracted by small ventings 
from any of the tanks. A normal procedure with the S-IVB. 



s e rva ti ons 
c on f e ren ce 
quiet time 
taken care 



following the press 
should be a relatively 
engineer has pretty well 
Saturn V third stage 



APOLLO 16 MISSION COMMENTARY k I \b 1 11 CST 18:03 49/2 



PAO The crew is scheduled to begin a eat 

period and as we passed up to Charlie Duke we do not expect 
to have midcourse correction one based on the current track- 
ing data. At 6 hours 19 minutes Apollo 16 is traveling at 
a velocity of 11 15 9 feet per second now 29 187 nautical mil 
from earth. This is Apollo control, Houston. 



en:d of tape 



APOLLO 16 MISSION COMMENTARY h/lb/ll 18:36 CST 6:A0 GET MC-50/1 



PAO This is Apollo Control at 6 hours 41 minutes. 

During the change of shift briefing we accumulated s small amount 
of tape conversations which we'll play back for you at this time. 

continue to stand by live following that tape playback. 



And 



then 
S C 

CAPCOM 
CAPCOM 
CAPCOM 
S C 

CAPCOM 



Houston, air to ground are you ready? 
In a min ute 16 . 

Okay, 16, you can go ahead and cover. 
16 , Ho us ton . 
Go ah e a d . 

Roger. Just wanted to remind you 



16 here 
the UV, 



to the UV photography, we've got to change all of the 
s ures . 

SC 
SC 

G i ve me a page 

CAPCOM 
We'll s tart on 
S C 

CAPCOM 
seconds 2 frames 
S C 

CAPCOM 



Before 
expo- 



you start 



Ok ay . 
Pete , 
number for 
Ok ay , 

2-16. 



Go ahead with the update, 
and we'll update the shutter setting, 
we've got a whole bunch of pages. 



to change from 20 



t o 



Go ahead. 

Under item 4 we want 
2 seconds 2 frames. 
Okay, keep going. 
Okay, on page 2-17. 
frames changed to 1/15 second 2 frames. 

SC Okay, 2-16 line 4 20 seconds 

And 2-17 same line is 1/15 verses 20 seconds. 

CAPCOM That's affirmative and on page 2-19 we want 

to change shutter under item 5--we want to change shutter 1/15 
2 frames to shutter 1 2 frames. 



Item 4, 20 seconds 2 



to 2 s econds . 



S C 

CAP COM 
shutter 1/15 2 
S C 

CAP COM 

SC 

CAPCOM 
Change shutter 
S C 

CAPCOM 
to 2 seconds 2 
S C 

CAPCOM 
minutes, change 
SC 

CAP COM 

heading that says at T start 



Ok£iy, shutter 1/15 went to shutter 1 2 frames 
Roger, and on page 2-21 we have changed from 
frames to shutter 1 2 frames. 
Okay , that ' s item 2 2 
Affirmative, that's item 2. 
Okay, that was shutter 1 (garble) 1/15. 
Affirmative. And on page 2-22, item 2. 
1/15 to 2 frames to shutter 1/2 2 frames. 
Copy, 1/2. 

On page 2-23, item 4, 20 seconds 2 frames 
f rames . 

Ok ay , copy . 

And on page 2-24, under at T start plus 7 
seconds 2 frames to 1/15 second 2 frames. 
Can you say where that is again? 
Okay, it 



20 



s on page 2-24, 
pi us 7 minute s . 



and it s under the 



SC Okay, 
that, but didn't get what 

CAPCOM Okay. 
1/15 second 2 frames. 

SC Okay, 

CAPCOM Okay, 



what was it, I'm sorry, I got all of 
it was . 

It's change 20 s econds 2 frames to 



copy . 
an d on 



p age 2- 36 , ab ou t 



1/3 of the 

way down the page where it says configure lens F8 1/30 4 - we 

want to change that to configure lens 1/2 stop between F 5.6 
and F8, 1/15 and 4. 



SC 

shutter 



to 1/15 



Okay, that's 1/2 stop between F 5.6 and F 8 



AFOLLO 16 MISSION COMMENTARY klX^Ill 18:36 GST 6:40 GET MC-50/2 



CAPCOM That's affirmative, John. 

CAPCOM And on that same page, about 2/3 of the way 

down, under the step that says ele ct r o ( garb le) power ON, we 
want to add a note to hold for instructions from MS FN . 

SC Understand — hold for instructions from 

MSFN -- is that before power ON? 

CAPCOM Negative, that's immediately after power ON, 

and I won't read you that instruction now, we'll wait until 
to we get to that in the flight plans. 

S C Ok ay . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h / 1(, / 12 CST 18:45 GET 6:50 51/1 



CAPCOM 16, Houston. 

SC Go ahead, Houston, 

CAPCOM Roger on this verb 49 thats at 7 hours 

in the flight plan. We want you to hold up on that so we 
can have a look at the attitude. 

CAPCOM 16, Houston. We had a temporary very 

short loss of com there did you do anything onboard to return 
com? 

SC We haven't touched a thing there, Pete. 

CAPCOM Roger, everything seems okay, now. It 

was very brief, but we lost it for a while. 

SC We didn't hear any squelth or any of that 

noise what you usually get when you loose com. 

CAPCOM Roger, understand. 

CAPCOM 16, Houston. The attitude in the flight 

plan for verb 49 is okay. You can go ahead with it. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k I \h 1 11 CST 18:55 GET 7:00 52/1 



PAG This is Apollo control at 7 hours 3 min- 

utes. The spacecraft will shortly be maneuvering to the 
proper attitude to take a series of ultraviolet photographs 
of earth using the electric Hasselblad camera which Is 
mounted in the right side window of the command module. We 
expect that as the spacecraft maneuvers we'll loose lock with 
the hi-gain antenna and communications will probably mom- 
entarily drop out or become quite noisey until we reestablish 
solid lock on. The crew by this time should have completed 
their what would amount to lunch. Their coming up now on 
the series of ultraviolet photographs of earth and this is 
an experiment which gathers ultraviolet photos both of the 
earth and later of the moon for studies of planetary atmos- 
pheres. Also prior to what will amount to their evening 
meal or dinner the crew will be doing a series of midcourse 
navigation sitings and also will be changing the lithium 
hydroxide canister and setting the spacecraft up in a passive 
thermal control mode a slow rotation of about three revolu- 
tions per hour to maintain the proper temperature equilibrium. 
At the present time we show Apollo 16 33 696 nautical miles 
from earth spacecraft velocity 10 358 feet per second. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h / lb / 12 GST 19:05 53/1 



an d 



SC Houston, 16. Over. 

CAPCOM Go ahead, 16. 

SC Okay, Pete, I think we've figured out 

what all this white particles is coming off the LM. On the 
the side of the LM that's between - OMNI antenna and the 
accent propulsion propellant tank. There is a surface that 
was gray that is now for some reason the thing is all stripped 
looking, it's the surface that's really almost perpendicular - 
parallel to the plus X of the LM. And it's all tattered and torn 
and shredded looked like shredded wheat is what it reminds me of. 
Over. 

CAPCOM 
SC 

looks like that 
off of that. 
CAPCOM 
CAP COM 
figuring out which 
us a little better 
t h e re . 

S C 

s ur f ace ri gh t 
the plus X of 
p el Ian t t ank . 

CAPCOM 
it runs right 
SC 

p arallel to 
CAPCOM 
S C 



Ro ge r , copy . 

And that is the only surface we have that 
we continually get particles shredding 

Ro ge r , c opy . 

Charlie, we're having a little trouble 
surface your talking about. Can you give 
description of what you were talking about 



On the plus X side on kid side. The 
below the docking target that runs parallel to 
the LM and right into the top of the aps pro- 



an d 



into 



Okay, right below the docking target 
the top of the aps propellant tank. 
That's affirm. And that axis is almost 
th e p 1 us X axi s . 

Ro ge r . 

And whatever that surface was is all 



shredded and as I said like 
spitting particles off. 



shredded wheat and it's continually 



CAPCOM 
deterioating now. 
SC 

about five or ten a 

CAP COM 

CAPCOM 
it n ow . 

S C 

CAP COM 
GN C check list page 
SC 

CAP COM 



Okay, in other words you can see it 



it's spitting particles off 



re going to take a look at 



That affirm, 
s e con d. 
Ro ge r . 

Ok ay , 16 , we 
Okay . 

And, 16 we've got a correction to the 
9 dash 4 whenever you get ready to copy 
Let's catch that after the UV photos. 
Rog, will do. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/16/72 GET 7:20 CST 19:15 MC-54/1 



SC Roger, will do. 

PAO This is Apollo Control, at 7 hours 22 

minutes. At present time the LM systems engineer is going 
through the handbook to try to pin point the precise location 
that Charlie Duke was describing on the lunar module. Charlie 
said that they appeared to have found the surface that is 
giving off the particles that were reported earlier. He said 
that they can see about 5 to 10 particles per second, shedding 
off of surface where the coating appears to have degraded, as 
best we can tell from his description. He says the surface 
looks like shredded wheat and it's giving off particles at 
the present time we haven't pin pointed precisely what lo- 
cation he's talking about although we expect the LM systems 
expert engineer will come up with that location from the 
description shortly. And then the procedure will be to deter- 
mine what if any effect the loss of that coating might have. 
Presumbly the concern if any exists would be for thermal 
considerations. Most of those coatings are on there to 
maintain the proper temperature conditions within the ve- 
hicle. 





CAPCOM 






16, Ho us t on 












s c 






Go ah e ad . 












CAPCOM 






Roger. On panel 


382 


th e 


p rimary 


gly col 


e \'ap 


. inlet 


temp 


va 


Ive , w e w an t to 


adj us 


tit 


s 1 owiy 


to ge t 


that 


temp to 


ab o 


u t , 


to evap out to 


ab out 


45 


degrees . 


You'll 


h cive 


to with 


the 


m . 














S C 






You want us to 


go to 


the 


man ual 


and set 


the 


e vap o ra t 


or , 


set 


the temperature 


to a 


45 


with a manual. 


Will 


w e h ave 


the 


water boiler going 


, is 


that 


cor re ct 


? 



CAPCOM 
CAPCOM 
maximum, you 
S C 

CAP COM 
S C 

panel and all that 
CAPCOM 



That's affirmative. 

16 go ahead and set it, move it toward 
will have to go pretty slow with it. 

Okay, can we stand by just a minute. 
Af f i rma ti ve . 

Thank you. I've got to open up that 
stuff. 
Ro ge r . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/ 16/ 72 19:2 5 GST 7:30 GET MC-55/1 



CAPCOM 16, Houston, can you go manual on high gain? 

S C Ro g e r . 

CAPCOM Charlie was in reac and it was drifting 

ar ound. 

Okay, it is in manual now. 
S C Ro g , agai n . 

This is Apollo Control at 7 hours 38 minutes. 
We appear to pin down on the diagrams a little more precisely 
where the thermal skins that Charlie Duke described shredded 
and spitting off particles are located. Perhaps the best way 
to describe this would be to ask you to visualize the Lunar 
Module as if you were looking at the ascent stage of the LM 
facing the porch -- the front porch -- or the part of the LM 
that looks like a face, and visualize the docking target, which 
is on an upper surface slightly behind and to the left of the 
commander's position. The panels extend downward from this 
docking target would involve several square feet of surface 
area downward to the bolbus tank that is underneath thermal 
skins and that pertrude from the right side of the Lunar Mod- 
ule. We have very little data on the Lunar Module at the pres- 
ent time. The only data that we're monitoring is the amount 
of power being transferred from the Command Module to the Lunar 
Module. So we have very little information to go on In assessing 
what the affect might be. As I mentioned previously, the pri- 
mary purpose of these skins, which are generally consist--al- 
though they vary from place to place on the LM- - gene rally con- 
sist of layers of coated mylar capton, which are thin plastic- 
like materials -- the sole purpose of which is to maintain the 
proper temperature conditions for the equipment tanks and so 
on that are underneath. Among the equipment underneath this 
section of the Lunar Module, is RCS system A, oxidizer and helium 
tanks -- we understand also there is a water tank in that area. 
We are investigating or discussing the possibility that a leak- 
ing tank might have something to do with shredding of the mat- 
^-^^3.1 -- I think that the primary concern at this time is what 
is causing the material to shred. Among the things that have 
been discussed are turning the TV ON, getting the people on the 
ground a look, the response that Flight Director Pete Frank got 
to that suggestion was it probably wouldn't do us a great deal 
of good, although that one is still an open possibility. And 
the LM systems engineer is continuing to evaluate the situation 
and we'll be coming back with additional recommendations. At 
the present time Apollo 16 is 37 181 nautical miles from Earth. 
The spacecraft velocity is down now to 9 82 6 feet per second. 

Houston, is that close enough on that evap 
temp -- looks like I can't hit 45 -- I can hit 43 or about 46 
or 7 . 

CAPCOM (garble) 16, that looks good enough. 



AFOLLO 16 MISSION COMMENTARY J Id / 12 19:25 CST 7:30 GET MC-55/2 



CAPCOM 16, Houston, on this panel that you were 
Icoking at that the particles are coming off of, that's not 
a hard piece of structure there, that's just a thermal pro- 
tection covering a standoff that's holding up in the RCS A 
system tanks. And all of the RCSA tanks are under there, and 
what we're concerned about 

END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/16/72 CST 19:A0 GET 7:45 56/1 



CAPCOM — that you were looking at, the particles 

are coming off of. That's not a hard piece of structure 
there, that's just a thermal protection covering, stand off, 
that's over the top of the RCS A, system tanks and all the 
RCS A tanks are under there and what we are concerned about 
is one of those tanks may be leaking and effecting the 
thermal protection blanket on top. 

S C Ok ay . 

CAPCOM Okay, we are considering the possibility 

of taking a look at the tank systems. 

SC I'm not sure. The picture we are trying 

to paint here is like you had painted something and then all 
the paint started to peel off. It's all stripping up like 
a - like you painted an old barn and had the paint come off 
of it. And it is all standing out, you can see it - kinda 
releasing from the surface. 1 don't know if that paints you 
a picture or not. 

CAPCOM Roger, I think that's the way we under- 

stand it. Are you still getting those particles coming off 
p ret ty fast now? 

SC They are not coming off as fast as they 

were a while back, but maybe that's our sun angle has changed 
to make them look quite obvious. 

CAPCOM Roger. 

PAO That last description came from Ken Mat- 

tingly. Ken describing the appearance of that thermal skin 
as looking like an old barn in need of paint, where the paint 
or whatever the coating is, is lifting up and kinda peeling 
back. 

PAO And systems engineer who has done abit 

more digging into the nature of the skins at that portion - 
at that part on the LM describes it as an aluminum skin about 
4 mills thick and painted. So that would go along with the 
crews description of the peeling. This, as we mentioned 
previously, the skins at various portions on the LM differ 
typically they would be the mylar type of material, but there 
are also skins that are aluminum. 

SC Hey, Don, we're ready - looks like we 

ought to be deactivating the primary evaporator or did you 
want us to keep it on for a while or something? 

CAPCOM Ah, negetive Ken, you can go ahead and 

shut it down. Stand by for a minute. 

SC Alrighty. 

SC Okay, Don, we've got the evaporator 

s e cure d . 

CAPCOM Roger, copy. 

CAPCOM 16, Houston. On that panel 382 , the 

manual control, the mixing valve, looks like we are going to 



APOLLO 16 MISSION COMMENTARY h I \t 1 11 CST 19:40 GET 7 : 45 56 /2 



CAPCOM have to play with that valve every time 

we change attitudes so you might just leave that panel open 
or closed, one or two of the fasteners so it will be easy to 
get into. 

SC Okay. Looks like that is going to be fun 

around the moon doesn' t it. 
CAPCOM Rog. 

CAPCOM We are looking at that right now Ken. 

SC Alright. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hlldjll CST 19:58 57/1 



PA.0 This is Apollo control at 8 hours 5 min- 

utes. Apollo 16 at the present time is maneuvering into the 
proper attitude for calibrating the optics system that will 
be used in a series of star sitings. These are taken routinely 
on the transearth and translunar legs of the flight. The 
information is fed into the onboard guidance system and is 
used to update the onboard systems knowledge of so called 
state vector. The trajectory - of the vehicle is currently 
on and this data is then compared with the ground figures. 
And as the spacecraft maneuvers into this attitude we loose 
lock with the hi-gain antenna and have momentary drop out in 
communications. Again to reiterate the description that we 
have gotten from the crew what appears to be paint peeling 
from a portion of the lunar module thermal skins about 45 min- 
utes ago or about 7 hours and 17 minutes Charlie Duke came 
on the circuit to describe the location of the lunar module 
from which a series of white particles that have been described 
earlier as drifting past the command module appeared to be 
emanate from. He said it was on the side fo the lunar 
module between the OMNI antenna and one of the LM tanks. And 
had the appearance of skin that was torn or shredded. With 
particles coming off at a rate of about 5 to 10 per second. 
The initial reaction here in the control center that was one 
of the mylar or kaptom skins which is stretched over the 
lunar module surface for maintaining the thermal control 
proper temperatures within the vehicle had shredded and it 
was these particles coming off. This is very fragile material 
physically and since the lunar module does not have to with- 
stand aerodynamic forces these surfaces can be very light 
weight and consequently are quite fragile. The initial con- 
cern was from what had shredded the material. Later Ken 
Mattingly gives a further description and also we coupled that 
with information from the LM systems engineer here in the 
control center. Ken's description was that the material 
appeared to be paint peeling back from a hard surface the 
LM systems engineer verified that the skins at that point on 
the lunar module are very thin aluminum. He said that they 
were four mills thick and are painted which would indicate 
that the skin itself the aluminum structure is not damaged, 
but the paint which is also on there for thermal purposes is 
apparently peeling back. At the present time we're continuing 
to evaluate what affects that might have thermally on the 
equipment beneath the area. The panels the thermal skins are 
over RCS system A one of the two RCS systems tanks. The 
oxidizer tank, helium tank and also water tank was reported 
in that area. One of the things that has been discussed and 
is still under consideration is the possibility of having the 
crew enter the Lunar Module and power it up enough to give us 
a look at some of those systems and perhaps allow us to draw 



AFOLLO 16 MISSION COMMENTARY / 1(> 111 CST 19:58 5 7/2 



PAO some further conclusions as to what might 

be happening. And as we mentioned previously the only 
measurements that we have on the lunar module at the present 
time are the power measurements. We're monitoring the amount 
o i: power that is being supplied from the command module to 
the lunar module. 

CAPCOM 16, Houston. Go to high gain. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h I \b 1 11 CST 20:03 GET 8:08 MC-58/1 



CAPCOM 16, Houston 

SC 16,gohigh 

CAPCOM 16, Houston 

END OF TAPE 



, go to high gain, 
gain . 

, give us a high gain antenna. 



A?OLLO 16 MISSION COMMENTARY hjltlll GET 8:14 GST 20:09 MC-59/1 



PAG This is Apollo Control at 8 hours 15 minutes 

The LM systems engineer has — 

CAPCOM Roger 16, you're loud and clear. 

SC Roger, I see something coming off of the 

Lanar Module now, but I haven't been up here looking out the 
window. I just noticed it looks like it's coming out of a 
vent or something. From looking at it through the window, it 
i;3 beneath this sheet that's sort of shredded off, and it's 
right between the — that spiral antenna, and above the big 
APS tank. But this is definitely coming out in a stream right 
now, looks like, and not very many particles, but they're just 
being propelled away from the Lunar Module at some velocity. 



CAPCOM Okay, 
laok at it. And Roger, I 
the LM and take a look at 
what's going on here. Do 



Rog, let's get in there and take a 

think we're going to have to get into 
the RCS systems gauges to tell 

you notice any color or anything more 



descriptive about that stream? 

SC Well, my opinion of the color is 

a brownish material. 



that it 



CAPCOM 
SC 

but so me o f 
CAPCOM 
CAPCOM 

C and Delta 
S C 

go in there 
CAP COM 
SC 

tjde, Pete? 
SC 

kind of a — 
CAP COM 

in a minute, 
S C 

CAP COM 

SC 

which is what 



Ro ge r . 

And some of it has long flakes to it, and 
it is just little particles. 
Ro ge r . 

16, we would like to have a look at the LM 
P before you start pressurizing it also. 

Okay, do you want us to stop the B 23 and 
right now? Over. 

That's affirmative, 16. 
Okay. Do you want us to stay in 



this at ti- 



And Pete, you might 
where you want us to enter 

Roger, I understand. 
Ch arlie . 

Ro g , the 

Ro g e r . 

We ' re up 
i t was due to 



be thinking about what 
the checklist. 

We'll get back to you 



don ' t th ink 
CAPCOM 

on page 2-1 
S C 

CAPCOM 



activation checklist, I guess. 

to 6/10 on the LM C and Delta P 
our cab pressure difference, I 



it has leaked any. 

Rog, we copied, and Charlie we want to start 
in the activation checklist. 

Okay. (garble) if I go to wider deadband. 
First of all Ken, we want a roll to 91 de- 
grees and that'll bore site the AFT OMNI toward the Earth, and 
also we want the waste storage vent valve closed. 

SC Okay, now, take it a little slower here. 

You want to do a maneuver to a roll of 90. That's Affirm? 
CAPCOM A roll of 91. 

SC Okay, do you want the other attitudes to be 



APOLLO 16 MISSION COMMENTARY 4/16/72 GET 8:14 CST 20:09 MC-59/2 



SC the same as I have now? 

CAPCOM That's affirmative. That's affirmative 16. 

SC Okay, 1 have 9100 and we use the present 

pitch and present yaw and you get the v.'aste vent close. 

CAPCOM Roger, the waste storage vent closed. 

SC V/e've done that. Okay, we're starting our 

mane uve r n ow . 

PAO This is Apollo Control at 8 hours 20 minutes 

and the import of that last series of exchanges with the crew, 
as we are instructing them to enter the Lunar Module and we'll 
power it up sufficiently to look at some of the systems and 
try to determine from the data what, if anything out of the 
ordinary, is happening. The additional description that we 
got a minute or so ago was from John Young. John described 
the particles coming off as on further evaluation to have the 
appearance of some sort of a vent. He said that the material 
appeared to have a brownish color, and appeared to be propelled 
away from the Lunar Module with some force. He said that it 
was coming out in a stream, sometimes particles and sometimes 
as longer streams. And the main thing that we'll be looking 
for when the LM is powered up is the propellant pressures and 
temperatures particularly in that area of the Lunar Module. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/16/72 GET 8:21 CS T 20:16 60/1 



SC Okay, Houston we're opening the LM 

p ri2 s s uriz ati on valve now. 

CAPCOM Roger. 

SC How does it look? 

PAO It appears at this point that the crew 

is opening the LM hatch total time probably would be around 
15 minutes from the time they started the procedures of get- 
ting into the LM until they're in and began turning on some 
of the switches so that we can look at those lunar module 
s y s t ems . 

CAPCOM Ken, we're also trying to get some TV 

looks at that venting condition if it doesn't interfere with 
the ac ti va t i on . 

SC Okay, I tell you what we've stowed the 

camera afterwards wait until they get in the LM and then I'll 
go down and get that thing out. I can do that while their 
going in the re . 

CAPCOM Roger, understand. 

PAO Both, Charlie Duke and John Young will 

be entering the Lunar Module they're in the process of doing 
that right now, and at the present time Apollo 16 is 
41 141 nautical miles from earth traveling at a speed of 
9 298 feet per second. We have asked Ken Mattingly to get 
out the TV camera and we expect that once Duke and Young are 
in the Lunar Module cleared out of the way so he can get to 
the area where it is stowed that he will get it out and we 
would expect to get a TV picture hopefully showing the area 
of the Lunar Module where the particles are coming from. 
And shortly after that we should also get some data from the 
Lunar Module which if of course the thing of greatest interest 
to the controllers here in mission control, particularly they 
are interested in looking at the propellant pressures and 
temperatures of RCS system A which is in the vicinity of the 
lunar module where we're seeing the materials - particles 
e min at in g . 

CAPCOM 16, can you zero the optics all you have 

to do is hit the switch. It's within 10 degrees. 

SC Okay, Houston, how far along in this activa- 

tion would you like us to go? 

CAPCOM Standby a minute, Charlie. 

CAPCOM Step 7, Page 2 dash 3. 2 dash 3 

step 7 . 

CAPCOM Go to 2 dash 3 step 1, Charlie. 

SC Okay, westart on 2-1, right. 

CAPCOM That's affirmative. 

PAO This is Apollo control at 8 hours 

33 minutes and that last transmission from Charlie Duke indi- 
cates to us that Duke and Young are in the Lunar Module 
going through the activation checklist at the present time 



APOLLO 16 MISSION COMMENTARY k I \b I 11 GET 8:21 CST 20:16 60 /2 



PAO getting the LM partially powered up so 

that we can get a look at some of the critical systems and 
the pertinent in this case in <in attempt to determine what 
if anything out of the ordinary is happening. And as we 
mentioned previously we do expect to get some television from 
the command module. Ken Mattingly advised us that he would 
be getting the camera unstowed and in operation as soon as 
po s s ib le . 

SC Okay, Don they're on their way into the 

LM now and Charlie's in there John is joining him and I'll 
work on getting the TV camera out. 

END OF TAPE 



Al'OLLO 16 MISSION COMMENTARY h/ 16/12 CST 20:2 9 GET 8:34 MC-61/1 



SC okay, Don, they're on their way into the 

no\tf and Charlie's in there and John's joining him and I'll 
Wijrk on getting the T.V. camera out. 
CAP COM Okay, 

SC Okay, Houston, we're going onto LM 

power right now. 

CAPCOM Roger. 

SC Okay, we've gone to reset and off. 

CAPCOM Roger, 16. 

SC The time was 8: 36 34. 

CAPCOM Roger. 

CAPCOM Ken, when you get the camera set up ready 

to operate we'll go to medium B width on the high gain antenna. 
SC Okay, and it's going to be a few minutes, 

CAPCOM Rog. I understand. 

SC Okay, Houston, you should have the data 

n i:iw , according to our check list. 
CAPCOM Roger. 

SC We're down through step 7 on page 23. 

CAPCOM Roger, 

PAO We have the data from the lunar module, now 

w.a're looking at it. And we'll get an evaluation. 

SC RCS, Quad A and B meter, take a look at 

th em . 

CAPCOM Stand by one. 

CAPCOM 16, I guess we don't need the heaters. 

W(5 ' re looking at all the data now. 

SC Okay, we didn't say heater we said meter. 

CAPCOM Roger, stand by. 

SC I guess we can take your word for it, 

that's for sure, 

CAPCOM We're looking at all the data now. 

SC Okay, fine. Our systems A RCS meter, 

wliich is not powered, is at 92%, quanlity and B is a little 
over 10 0. 

CAPCOM Roger. 

SC Okay, I'm ready to give you a T.V. from 

the outside. 

CAPCOM Roger, Ken, understand. 

PAO Our LM systems engineers report from the 

data we've seen so far that everything looks good. Looks nor- 
mal, no evidence of any propellent ].eaks or p r e s s ur az a t i on 
leaks and we're standing by now for television from the com- 
mand module. 

CAPCOM 16, based on what we're looking at, the 

systems main pressures look okay. We don't sec any problems 
with the tanks . 

SC Okay, that sure is something strange 

going on, I never saw anything like that on LM 4. I mean I'm 
not normally a rabb le reus er, it, it's just ain't something 
funny going on there. 



CnHMKNTARY 4/16/72 CST 20:29 GET 8:34 MC-61/2 



W o u I ci y o u li ke t o li a ve die wide beam 

o 11 t.s i de ? 

CAPCOM Yes, Ken, I guess so, we haven't got a 

ii i c t u r e yet ii e re . 

^~iC Don, l-'m waiting for you, you said so me- 

thing about s rae liigli gain things you wanted to do and I hadn't 

d o n e any of those things vet. 

CAP COM <;h , we wanted to go to medium beam width, 

on the high v,,ii\ a:i(! we're ready for the pictures any time. 



END 0 F T Ah h 



APOLLO 16 MISSION COMMENTARY 4/16/72 CST 20:37 GET 8:42 62/1 



CAPCOM -- medium B width on high gain and we are 

ready for the take pictures any time. 

SC If, it looks okay to you, Houston, do you 

want us to fire this thing down now? 

CAPCOM Standby just a minute. We are going to 

on(; last long look here, but everything looks okay so far. 

SC That'sgreat. 

CAPCOM 16, on panel 16 in the LM under the PUGS 

display breaier and let's push that one in and we'll take a 
look at quantitties. 



S C 

an 'i I'm not going 
pi cture . 

CAP COM 
1^ en t to 10 0 each, 

CAP COM 

S C 

S C 

P AO 
pi ;t ur e . 

CAP COM 

S C 

CAPCOM 
S C 

have you pull 
S C 
PAO 



Okay, Don and do you have a picture now 
to zoom in until you've got a got a good 

Okay, that ones in and the quantities 

Looks like the TV's in standby. Ken. 

Doesn't that help. 

Rog. 

And we are getting a black and white 



Quantjrf-ies lood good 16. 
That's affirmed, they are both 100, 
Okay, 16, we are ready to back out. 
You pull that breaker right down. We'll 
breaker first and back down// Thank you. 
Okay, Don, can see any picture yet? 
At the present time we are looking at the 
picture in black and white waiting for the color converter 
to Id ck up . 



the 



Okay, I m in transmit 



Got a good monitor 



SC 

this time 
the TV. 

CAP GO 
think the problem 
min u te , I gue s s . 

S C 

you the part we're 
CAPC OM 
CAPCOM 
SC 

do you have a grid, I've got a gridth 
you should be able to correlate with, 
available, if you don't I'll just try 
the frame? 

CAPCOM Standby just a minute 

we don't have a gridth right now. 

SC Okay, right now the center of my picture 

in just about from the center of the docking target, does 



I got FM transmitter. I got the S-band (garbled) 

Okay, Ken, I think the TV's okay. I 
is here. It will take us about another 

Okay, I'll stand by. I'll have to show 
lo oking at . 
Roger, 

Okay, Ken, now we are getting a picture. 
Okay, can you see the docking target and 

on my monitor which 

Do you have that 
to talk you in towards 

Sorry, Ken, I guess 



Apoilo K) Mission Commentary, S/16/72, CST 20 : 3 7 GET8 : 42, 6 2 /2 

0 2/2 



SC look like your picture? 

CAPCOM Affirmative. 

Okay, I'mgoingtomove the camera up and 
there Is a 11 at surface which Is now just about in the center 
of my picture and it is pointing away from me, this is the 
one we can see it peeling off of. 

CAPCOM Roger. 

I'm going to try to zoom in on it then, 
I'll see the best monitor picture 1 can get and I may have to 
talk me on some of the other. 

CAPCOM Okay. 

SC Houston, our activation check list says 

leave the cabin repress breaker closed but we found it open. 
How do you want to play that one? 

CAPCOM S t an dby mie a mi n ute . W an t t h a t on e o p e n 

all the way out. 

SC Open, all the way out. "Rgg. 

CAPCOM That's real good, Ken. Hold it right 

there , 

SC I can ' t h an g th em . I'm stuck here 

I'll get back with you. 

CAPCOM Okay. Ycu had a real good picture there 

where you were. 

SC Okay. 

CAPCOM Yeah, Ken, we are seeing the stuff coming 

off of there n ow . 

CAPCOM Ken, while we are looking at it, we are 

trying to get a hack on whether or not there are any jets 
firing across that surface that would correlate with those 
particles coming off. 

• j C Yes, sir, there are. My A thruster seems 

to bang on It nuite a bit. And we put the LM power hack to 
CSM at 8 52, I'd say about 15 seconds ago. 

CAPCOM Roger, copy. 

SC Don, are you through with those pictures 

or do you need something else? 

CAPCOM Hang on just a minute, Ken. 

CAPCOM Hen, we see occasional particles come off, 

but we are not seeing a stream. Do you see a streaming like 
John was talking about earlier? 

SC No sir. A.h , w el 1 , w e a r e in an en t i re 1 y 

different sun angle now and it is not clear to me. We don't 
see different things. Maybe John can take this thing and 
show you whore it was coming from. I didn't see it. 

CAPCOM Roger. 

SC I'd he glad. I'd be only to happy to 

point it o u t . 

CAPCOM Rot^. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/16/72 CST 20:50 GET 8:55 MC6 3 / 1 



(garble and heavy noise) 

SC (No it", stopped, when we maneuvered it wou 

fhie sun it stopped pealing off.)- 

Yes. 

Okay, Pete, take that back, you can see 
of it as the particles stream off when they get out 
sun you can see them. And it looked like they had 
trajectory as the other ones, but it 



of 



S C 

s c 

a little 
into the 
the s ame 
r :. gh t n ow . 

CAPCOM 
s ]. i gh t r i gh t 

S C 

CAPCOM 
SC 

b r in gin g th e 
CAPCOM 



going out 



is very few 
the top center 



side 



old 



Roger. Kind of 
of th ep 1 c t ure ? 

Yes, that's right, yes. 
Rog. 

Okay, I was off com over there, how about 
LRC up to speed. 

Ken, can we roll to get this area back 



into the sunlight where we could have a better look at it? 

Okay, Pete, we're just about ready to 
mane uvering . 

Okay, guess you want to go back the way 
back to that attitude where you had good sun- 



S C 

maneuver. We 

CAPCOM 
came then go 
li gh t on it. 
S C 

CAPCOM 
S C 

come out from 
i: is leaving 
CAP COM 

S C 



are 



you 



that's the P-23 attitude 



and every so often I see a particle 
at some accelerated velocity, like 



Ok ay , 
Ro ge r , 
Ok ay , 
that re gl on , 
the spacecraft. 
Ro ger. 

I can't speak for amu edification for all 
all the pads the blanket pressure and the helium tanks looking 
okay on the RCS ? 

CAPCOM Affirmitive, they were, John. 

PAO This is Apollo Control, the picture we're 

getting right now is the interior of the command module. All 
three crewmen back in the command module, now. And after the 
iDok we got at the lunar module, on the telimetry data, every- 
thing appeared to be normal. We've had a group of very interest- 
ed engineers and projects management people here in the control 
center, looking at the television picture. And can see very 
clearly the panel which had the shreaded appearance what 
Charlie Duke described earlier as appearing like shreaded wheat. 

CAPCOM The LM we didn't show any current drain 

when you went in there. 

SC Yes sir, just like the refrigerator, it 

came on, with the hatch about a quarter of the way open and 
wien I went to all we had all the flood lights. 
CAPCOM Roger. 

SC But you can see a lot better over there 

when you take your shades off. 



APOLLO 16 MISSION COMMENTARY k jit ! 11 CST 20:50 GET 8:55 MC-63/2 



CAP COM Rog 

SC And Pete, every time the, one of the 

command module, service module, RCS plus X jetts fire to- 
wards that one over the hatch it really blows that stuff off. 

CAPCOM Roger, copy, 

SC Okay , Ho us ton , as of this moment that 

area is completely free of particles. It wouldn't do you 
any good to show you any T.V. of it, because it's not doing 
any th in g . 

CAPCOM Roger, copy. Okay, John, I guess that's 

about all the data we're going to get, we're going to have to think 
that over for awhile, so go ahead and stow the T.V. camera and 
get back to the flight plan. 

Yes, sir. It's certainly an unsual 
thing and further more it's very strange how this upper sur- 
face here has flaked off behind the docking target. Which I 
guess you can't see that on the T.V., I couldn't see it on 
the monitor. Can you see it on the T.V.? 

CAPCOM We get a pretty good look at a portion of it, 

looks like a lot of, like Clarle 

S C 

an inch of grass growing out of the surface there. 

CAPCOM Yes, we got a pretty good look at that. 

SC Okay. 

CAPCOM I don't think we know what it neans yet, 

but we did get a good look at it. 

SC Rog, Charlie, might say that looks bad. 

SC Did you have a T.V. picture in the cock- 

pit th e re . ? 

CAPCOM Affiramtige, a real bried miniuue. 

SC That'swhat I was afraidof. 

CAPCOM Okay, 16, we'd like to get thewaste 

stowage vent valve open again n ov\f . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/16/72 GET 9:05 CS T 21:00 64/1 



CAPCOM Okay, 16 we'd like to get the waste 

st:owage valve open again, now, 

SC And, Pete the Lunar Module looks very 

clean there was very few particles in it and that's just 
al> ou t it o ve r . 

CAPCOM Ro g , understand. And Charlie we'd like 

to go into the flight plan here at 12:15 and delete closing 
thie waste stowage vent valve and move that to 13:15. 

SC Okay, we're moving it to 13:15. 

CAPCOM Roger. 

PAG This is Apollo control at 9 hours 8 min- 

utes. Again, to recap the situation after having the crew 
get in, power up the lunar module and taking a look at the 
e^cternal area where the material on the skin was shredding 
particles were coming out. We can find nothing obviously 
wrong and that's obviously reasuring to have all the data 
on the propellant tanks and the pressures, quantities looking 
normal. At the present time the thing that we're looking 
into is the possibility of an unusually large number of jet 
fi.rings at some point from the command module reaction con- 
trol system thrusters that might have perhaps degraded or 
burned the surface or chemically caused it to peel up the 
way it appeared to be in the television picture. But, I 
would say at this point that there is somewhat of a relaxed 
or at least not overly tense mood in the control center and 
certainly it was reasuring to see ail the data looking good 
when we did power up the lunar module. Apollo 16 at the 
present time is 44 921 nautical miles from earth and the 
s]3acecraft velocity 8 851 feet per second. And, Charlie Duke 
reported also that the Lunar Module looked extremely clean 
when they got inside no particles floating around there have 
b(;en times in the past where the lunar module has had particles 
on one occasion from some docking tunnel insulation that had 
g(Jtten in there and also have been occasion where when the 
LM was de p re s s url z e d glass covers on some of the instruments 
had broken. But, apparently no problems of that nature as 
Duke reported the LM looked very clean. 

PAO At the point the crew will pick up their 

flight plan. They will be about 1 hour perhaps a little bit 
m(3re behind where they would have been had this problem not 
cropped up. This is however a relatively slack period in 
the flight plan. We were expecting to be able to make up the 
time without a great deal of difficulty. They're scheduled to 
be taking some navigation sitings through the command module 
optics system. These will be used to update the onboard 
gtiidance systems knowledge of its position and trajectory. 

PAO This is Apollo control as a point of 

interest that entire exercise in the lunar module took about 
1 hour. We reached the conclusion here in the control center 



APOLLO 16 MISSION COMMENTARY h I lb / 12 GET 9:05 CST 2 1:00 64 /2 



PAD that we were going to ask the crew to 

enter the LM at about 8 hours 13 minutes ground elapse time. 
A couple of minutes after that John Young came up with a 
further report of what appeared to be particles venting from 
the LM which we enforced and further confirmed the decision 
to go into the Lunar Module. The crew Young and Duke to our 
best estimate were in the LM by 8 hours 30 minutes ground 
elapse time and spent about 16 minutes in the Lunar Module, 
during which time we got a good long look at all of the 
critical systems and could find nothing out of the ordinary. 
And I again repeat Charlie Duke's description the LM looked 
extremely clean and that does - evaluation would apply equally 
as well to what we saw on the ground and what the crew saw 
onb o ar d . 

CAPCOM Correction 1 and we're looking at about 

12 feet per second on midcourse correction 2. 
SC That's great. 

PAO And capcom Don Peterson has just advised 

the crew that midcourse correction number 1 will not be re- 
quired. That opportunity for the midcourse is scheduled at 
11 hours 39 minutes and by the time we get around to the 
opportunity in midcourse correction number 2 the amount of 
velocity change it appears will be required some where on the 
order of 12 feet per second. By dropping midcourse correction 
1, of course, that will give the crew a bit of help in making 
up the time that w^as lost in going into the Lunar Module and 
we would expect they would have most of that time made up 
by the time their ready to begin their rest period. Apollo 16 
at this time is 45 817 nautical miles above the earth and 
traveling at a speed of 8 75 0 feet per second. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY ^116/11 GET 9:20 CST 2 1:15 MC-65/1 

SC Don, do you anticipate any significant change 

in the verb 49 maneuver angles due to our slip in time? 
CAPCOM Negative, not at all, Ken. 

END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/16/72 GET 9:40 CSX 21:35 MC-66/1 



PAO This is Apollo Control at 9 hours 58 minutes 

We have had virtually no conversations with the crew since they 
have completed the exercise in checking out the Lunar Module, 
some 45 minutes or so ago. And it has been relatively quiet' 
here in the Control Center. We've had no further discussions 
of the problem, or apparent lack of a problem with Lunar Mod- 
ule. The situation to recap began prior to this shift's coming 
on shortly after the translunar injection where the crew re- 
port of particles apparently coming off the Lunar Module. And 
at the time it was not known where they were coming from or 
what the nature of them might be. At ground elapse time of 7 
hours 17 minutes, Charlie Duke came on the circuit and reported 
that the white particles appeared to be coming from a portion 
of the Lunar Module below the docking target, and this would 
be on the right side of the LM as you are facing the Lunar 
Module looking towards the front porch and what's commonly or 
frequently described as the face of the Lunar Module ascent 
stage. He described the surface as having an appearence of 
paint or coating, peeling and giving the texture of shredded 
wheat. The immediate reaction here in the Control Center was 
one of concern for the possible thermal affects that this might 
have since the skin is on the Lunar Module, primarily to pro- 
vide thermal protection to the tanks and electrical equipment 
so on underneath. And it was also a matter of concern as to 
what might have shredded the skin or coating. We had very 
little data from the Lunar Module at this time. The only in- 
formation that we had was the amount of electrical current be- 
ing provided from the Command Module to the LM. At about 8 
hours 13 minutes after evaluating the possibilities and deter- 
mining that the skin was over an area of the Lunar Module which 
contained the reaction control system thruster tankage for RCS 
system A. It was decided here in the Control Center to recom- 
mend to the crew that they enter the Lunar Module, power it up 
and let us take a look on the telemetry at the pertinent tanks, 
pressures, temperatures, and so on. It was also decided to 
request that Ken Mattingly unstow the television and give us 
a look at the exterior of the LM. And shortly after this at 
8 hours 15 minutes John Young gave us a further report which 
perhaps increased the level of concern here in the Control Cen- 
ter a bit. Young reported that the particles did appear to 
represent venting. He said he could see them coming out with 
some force in a stream as if they were being propelled away 
from the LM. At this time we passed up to the crew the request 
that they get into the Lunar Module and power it up partially 
to let us take a look the other telemetry at those systems. 
About 13 minutes later, at about 8 hours 30 minutes. Young and 
Duke were in the Lunar Module and reported that they had switched 
over to LM power, and shortly thereafter we got a good solid 



APOLLO 16 MISSION COMMENTARY 'a I lb j 11 GET 9:40 CST 21:35 MC-66/2 



PAO look at the telemetry data. And we know 

that everything looked fine -- all of the tank pressures were 
ncrinal, the quantities weie normal, and the temperatures were 
also normal. And we looked at the telemetry long enough to 
assure the LM systems engineers that we had had no leaks and 
that there were no leaks in progress, and there was nothing 
tc indicate any problem whatsoever. Charlie Duke on coming out 
of the Lunar Module reported that everything inside looked 
very clean, and at about that time we also got the television 
picture from the Command Module camera which Ken Mattingly 
was operating and could see here In the Control Center a very 
clear picture of the few square feet of panels that were in- 
volved on the Lunar Module. These are aluminum skins about 
4/ 1000 of an inch thick, and they are painted. And the descrip- 
tion that Charlie Duke gave appeared to be very accurate. The 
1\ picture we saw here in the Control Center indeed looked 
very much like shredded wheat. The surface had the paint 
ct.rling up as if it had grass growing on it, or shreds of shredded 
wheat on the surface scattered around on what should have been 
a smooth relatively shiny surface. I'm seeing nothing to ex- 
plain the problem. The last thought that was discussed here 
in the Control Center was the possibility that some affect 
from one of the reaction control systems thrusters on the Com- 
mand Module had caused the surface to degrade — possibly 
heat or chemical components, or something of that nature, and 
there appeared to be no problem associated with it. There has 
been no further discussion since that time, and there appears 
tc be no further concern at the moment over what could have 
been a problem. The crew is presently involved in a series of 
star sitings, using the optical equipment, the sextant on the 
Command Module. Ken Mattingly is performing this exercise, 
taking sitings on a series of four stars, and then marking, 
pushing a button which enters the information into the Command 
Module guidance system. 

CAPCOM Affirmative, still with you. 

SC Okay. Hey, let me give you a couple of com- 
ments here real time so you can be writing them down. In 
one of the things that it mentioned was this business about 
reflections in the 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/16/72 CST 21:57 GET 10:02 67/1 



SC And one of the things that they mentioned 

was this business about the reflections in the sextant when you 
do the 23's and I've got a gee it's a beautiful picture of the 
earth horizon the optics are just super and we've got a got a 
what lood like inverted sort of a bare image in the oposite 
side away -from the horizons. It's really quite obvious. And you can 
just see the bright areas. 

CAP COM Roger, that's in the sextant. 

It's ab out Yes, it's in the sextant and it's about 
I don't know how to give you a percentage of the intensity 
but it is much less intense than than the thing in the earth. 
It's very bright. And the star is a - gee the match between 
the earth horizon as seen through a fixed line of site and 
the star line of site is just perfect. It's really nice. 
The only thing I can't see as well as I'd like like is the 
cross here and with the Illumination turned up to full bright 
they just don't stand out when the old earth in the field of 
view. When I get them down against the earth itself then I 
can see the dark line but when I got it out in the sky beyond 
the earths horizon I just don't see it as well as I'd 
like . 

CAPCOM Roger, copy. 

SC And, as you probably noticed there we used 

that little adaptive short P23 erasable program which is 
really swift that thing just fires these things off and I 
don't feel like in any way we're having to take short 
cuts on the pointing accuracy. The only time it takes now 
is to dress up the substeller point on initial acquisition. 
That's what we're doing now that seems to take quite a while. 

CAPCOM Roger. 

PAO That was Ken Mattingly. 

SC ... spacecraft and we should remember 

not to put the optics in the kitchen. 

CAPCOM Roger, understand. 

PAO That was Ken Matt ingly giving a subjectiv 

evaluation of the optics and of the program used in com- 
puting these mid course navigations. Mattingly noted that 
there was a reflection in the CSM sextant the optical device 
thai he was looking through in lining up a star in this case over 
the earth horizon. Once the star is lined up in the proper 
position Mattingly pushes a button and the computer automa- 
tically notes the time and the angle between the star and 
the earth horizon. And from this computes and updates its 
knowledge of the spacecraft position's trajectory. Mattingly 
noted that the - there did appear to be some somewhat of a 
reflection in the optics and he said it's primary affect was 
that it tended to wash out the cross hairs but that this was 
not particularly a problem. He said it was not as clean as 
he would like it, but we can verify it from the results that 



AFOLLO .16 MISSION COMMENTARY k I Id 111 CST 21:57 GET 10:02 67/2 



PAG he's getting which we're watching here 

on the groundj but he is indeed having no problems, the flight 
activities officer who is watching the entries that are made 
into the computer said that the data that Mattingly is get- 
ting is better than was expected preflight. 

SC That's the first mark isn't it? 

SC I think he cycled on us. 

SC I He's beea taking a little bit longer each 

ms rk , 

PAO This is Apollo control. Ken Mattingly 

is still involved in taking the midcourse sitings through 
the CSM sextant. On completing that activity the flight 
plan becomes relatively unencumbered. We don't have very 
m^iny additional scheduled activities and we expect that the 
crew will be able to make up the hour that was lost in getting 
Irto the lunar module and checking - checking out what appeared 
to be a possible problem resulting from that the - one of 
tb e skins on the lunar module was peeling and the material 
flaking off and the possibility that something was underneath - 
ore of the tanks or something connected with the LM thrusters and 
reaction control system was possibly ventin g and as we men- 
tioned previously on getting into the Lunar Module checking 
things out everything appeared to be normal. The - one thing 
that we did notice when we had the television on the area of 
the LM which was affected one of the aluminum panels several 
square feet in area was that when one of the thrusters on the 
CSM was firing and in particular forward firing service module 
thruster that the material which had flaked off appeared to 
be disturbed and this would cause it to float off or to be 
piopolled away from the Lunar Module. Flight Director Pete 
Fiank feels that the most likely affect of the thruster is 
in disturbing the degraded surface and he feels that it is 
less likely that the thruster impinging on the surface itself 
actually caused the problem, although at this point any 
any hypothesis as to what what caused the degradation of this 
thermal skin is purely speculative and we've seen nothing in 
the data to indicate any problem; however, the skin does appear 
abnormal and we have no explanation for it at this point. The 
midcourse correction maneuver which was in the flight plan 
the opportunity for that midcourse correction at 11 hours 
39 minutes will not be required. The spacecraft is very close 
tc> the prelanned trajectory the flight dynamics officer re- 
ported that a maneuver of only about 8 feet per second would 
be required. This is so small that it will not be performed 
at this opportunity, but will be allowed to continue until 
the second midcourse correction opportunity at which time the 
aniount of change in velocity that would be required would have 
grown to only about 12 feet per second. By deleting this 
midcourse correction that reduces the amount of things that 



APOLLO 16 MISSION COMMENTARY h /lb / 11 CST 21:57 GET 10:02 67 



P AO the crew has to accomplish before their 

rest period which is scheduled to begin about 4 1/2 hours 
from now and makes it appear quite likely that they will 
be back on the normal flight plan by that time. At 100 or 
rather 10 hours 27 minutes this is Apollo 
Control Houston. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k I \b 1 11 GET 10:25 CS T 22:20 MC-68/1 

ALL DEAD AIR 

END OF TAP£ 



APOLLO 16 MISSION COMMENTARY h/lb/ll GET 10:55 CS T 22:50 MC-69/ 

DEAD AIR TIME 

END OF TAPE 



AFOLLO 16 MISSION COMMENTARY, 4-16-72, C3T 23:08 GET 11:13 70/1 



CAPCOM 




16, we've got a state vector update, if 


yciu will go 


to accept. 


SC 




Roger, you've got full accept. 


CAPCOM 




Ro ge r . 


CAPCOM 




And, ALSEP, you can copy. We've got a 


change to the ON C 


checklist, page 9-4. 


S C 




Okay, I m on page 9-4 now. 


CAP COM 




Roger and Baker, co.ume Baker, line 4, 


change from 


115 2 2 


to 13353 and on line 5, change 13000 to 


0 0 04 1 . 






s c 




Okay, I am on page G9-4, column Bravo, 


li.ne 04 is 


13353 


that replaces 11522. Line 05 00041 replacing 


1 ^1 0 U U , 






LAV CUM 




That's affirmative Ken. 


s c 




Ro g e r . 


CAP COM 




And 16, you can have the computer. 


SC 




Okay, we are back to block. 


CAP COM 




Roger . 


S C 




Don, you folks ready for a little fuel 


c£; 1 1 purge. 






CAPCOM 




(garbled) we're ready. 


S C 




Don, fuel - -fuel cell one purge, 02 


purge is in 


p ro gre ss . 


CAPCOM 




Roger, copy. 


CAPCOM 




16, Houston, we're looking at an 02 flow 



of less than 1 pound per hour and we'd like to know if you 
h ;ive closed the waste storage vent valve. 
SC Negative. 

CAPCOM Roger, stay in negative. 

SC Houston, you want us to dump the waste 

water down to about 10? 

CAPCOM It's already 60, 

SC Okay, 10 percent it will be. 

CAPCOM Roger. 

CAPCOM L6 , let's terminate the charge on 

biittery Bravo. 

SC Okay, we're showing about 29 percent on 

our waste water now. How does that look with what you all 
have on the ground? 

CAPCOM Well, we're looking at about 30.5 percent 

n ow . 

SC Okay, so you want us to terminate ours 

at; 10 percent, our gage reading at 10 percent will be good 
e no ugh . 

CAPCOM that's affirmative, 16. 

SC Okay. 

SC Okay, we've terminated the waste, dum p 

CAPCOM Roger. 

SC Houston, we vented the battery and it went 

to ,4, maybe .2 now. 

CAPCOM Roger. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4-16-72 GET 11:49 CST 23:4 4 MC-71/1 



CAP COM 
before you (garble) 
S C 

CAP COM 

sc 

CAPCOM 
P AO 



Ch a r le e 



■ o u 



get a reading on that battery 



Rog , point 9 . 
Charles was that .9. 
Af f i r ma t i ve . 
Ro ge r . 

This is Apollo Control at 11 hours 59 
minutes and its continued rather quiet here at Mission Control. 
We've had relatively few conversations with the crew aboard 
Apollo 16 in the last 45 or 50 minutes. The activities aboard 
the spacecraft have been primarily housekeeping sorts of things. 
Dumping the waste water. These tanks gradually fill up from 
excess water produced by the fuel cells and at a given level, 
they are dumped back down to about 10 percent of their capacity. 
The crew has aligned the guidance platform used as a reference 
for attitude. They'll be changing out the lithium hydroxide 
canister that — one of the canisters that removes carbon 
dioxide from the spacecraft atmosphere. They also purged the 
fuel cells, running oxygen through the fuel cells at a high flow 
rate to remove any impurities and they are scheduled to be 
taking another series of ultra violet photographs of earth 
prior to beginning their rest period. They will also set the 
spacecraft up in the so called passive thermal control mode 
where the entire vehicle is rotated about its longitudinal 
axis at the rate of about 3 revolutions per hour to maintain 
the proper temperature equilibrium. And they are scheduled to 
begin their sleep period in about 3 hours. At the present time, 
Apollo 16 is 58,133 nautical miles from earth and traveling at 
a speed of 7,604 feet per second. 

CAPCOM 16 could you give us a reading on LM- CM 

delta P? 
S C 

what it w as in 
on our gauge. 
CAPCOM 
SC 

ve ri f i e d c los e d . 

CAPCOM 
we want to be sure 
get that. 

S C 

last sequence we did go 3. 
CAPCOM Say again. 

SC On that first EV sequence, we did go 3 

CAPCOM Roger. 



th e 



Rog. LM cm delta P 
altitude chamber and 



is 2 tenths, which 
that apparently is 



1 s 

0 



Roger. Understand. 

And the pressure equalization valve is 

Roger. 16 Houston on this UV photography, 
we go mode 3. I think last time, we didn't 



N o 



the 



we did get it last time. (garble) on 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h/ll/ll CST 00:07 GET 12:13 MC-72 



y (5 u 
i I . 



CAPLOM 
SPEAKE R 
CAP COM 
to go on 



16, go on 
( g arb le d) 



re de 1 1 a , 



16, when you finish the UV photos we'd lik 
and start the PTC right away if you concur with 



you 



connection with that we'll ask 
to going into PTC. 



Be glad to. 
Ro g . an d in 
gain power 
Ok ay. We'll stow It. 
Eo ge r . 

Hey, Don you really can get some pretty 
c on di ti on s . 

Good deal. 

Say, Houston. Casper. 
Go ahead, Casper. 

It looks huh - - it looks to me like we've 
propellent than I would have guessed. Is 
just our onboard readings or is that a fact? 

CAPCOM We're seeing apprrently some biases in the 

RCS sensors Stand by we'll get you some readings. 
SPEAKER Okay. Thank you. 



SPEAKER 
CAP COM 
to stow the high 
SPEAKER 
CAP COM 
SPEAKER 
suable initial 
CAPCOM 
SPEAKER 
CAPCOM 
SPEAKER 
lot more 



us; e d 

i 1: 



RCS 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4-17-72 GET 12:44 CST 00:37 MC-73/1 



CAPCOM On the alpa 60. 

SC On the alpa. 

CAPCOM 16, prior to entering PTC go manual and 

wide on the high gain and minus 5 2 and 2 70. 

SC Okay, okay got manual and v/lde, minus 52 

and 2 70. 

CAPCOM Roger, thank you. 

CAPCOM 16 Houston, we are going to have to delay 

going into the PTC until after we close the waste stowage 
vent valve at 13:50. 

SC Okay, we're suppose to wait 20 minutes for 

the rates to damp anyhow huh? 

CAPCOM Sounds right. Okay, and on the RCS quantities, 

I've got some numbers for you here. 

S C Go ah e ad . 

CAPCOM Roger. The quad A is reading 1.5 low, all 

the rest of them are reading high. Quad Bravo is ,6, Charlie 
is 5.7 and Delta is 5.6 and our Delta on the flight plan is 
a plus 5 total right nov/. 

SC Okay, is that — is that pounds, or percent 

or degrees or what? Over. 

CAPCOM The total of 5 pounds is pounds, 

SC Okay. Thank you. 

CAPCOM Roger. 16 Houston, we are starting to see 

a high temperature in the subsatellite battery in the SIM Bay, 
so what we'd like to do is go ahead and close the waste stowage 
vent valve now and get into PTC as soon as we can. 

SC Roger, waste stowage vent going closed 

now. Houston, how do the rates look to you if we're going into 
PTC now? 

CAPCOM Standby a little and we'll take a look. 

The rates look good and you can go ahead into PTC. 
S C Ro g . 

PAO This is Apollo Control at 13 hours. Apollo 

16 will shortly be going into its passive thermal control mode 
with the spacecraft rotating at about the rate of 3 revolutions 
per hour to maintain proper temperatures and we do have from 
the flight dynamics officer now a preliminary estimate on the 
time and location that the Saturn 3rd stage, the S4B will im- 
pact the Moon. This event is tentatively now expected to 
occur at 75 hours 6 minutes 28 seconds. And the preliminary 
target point — we expect that this will change somewhat as 
we get additional tracking on the Saturn stage — is lattitude 
1 degree 12 minutes north, 22 degrees 38 minutes west. This 
is about 7 and a half degrees off of the planned target point, 
30 degrees west was the nominal impact point for of S-IVB S4B but 
as I said, we expect that these coordinates will be updated 



APOLLO 16 MISSION COMMENTARY 4-17-72 GET 12:44 CST 00:37 MC-73/2 



PAO as we get additional tracking on the vehicle. 

Wc; ' re now essentially back on the flight plan and having made 
up the approximately one hour that was lost in going into the 
lunar module earlier to check the lunar module after it was 
noted that paint was flecking from one of the thermal control 
panels — one of the aluminum skins on the lunar module and we 
e:?sentially now made up that time with the crew back on the 
r(;gular flight plan. 

SPEAKER See here. In monitor, the primary loop ran 

out temps and let J. t stabilize and then it may be necessary to 
go down to panel 382 and adjust it again to try to keep that 
temperature at about 45 degrees tahrenheit. 

SC Okay. 

CAPCOM And Ken if we have to do that, we'd 

Suggest that you mark a place down there so that during the 
subsequent PTC's. you can just set the thing to that mark. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY / lb 1 11 CST 00:57 GET 13:02MC-74/l 



CAPCOM 16, Go OMNI Bravo and we'll take over 

switching it for you. 

SC You/ ve got OMNI Bravo. 

CAPCOM Roger. Thank you. 

SC Hey, Don. 

CAPCOM Go. 
CAPCOM Go ahead. 

SC You would really love this sight. As 

we rotate around, now, we've got the Earth out the window number 1, 
and it's about - oh, almost - not quite down to half, and you 
can see India and the continent. It's covered with clouds 
and no photograph can ever describe the way it looks. 
It's really super. 

CAPCOM It really sounds fantastic. Wish I 

w e re th ere . 

SC Yes sir. You would love it. You can 

see all of Australia, too. It's really something else. 

CAPCOM About what size does the Earth look 

from where you are. 

SC Looks like it's about — it's approxi- 

mately A, 000 miles in radius. 

CAPCOM Hey, that's a pretty good estimate. 

SC No, It didn't quite fill the window. I'm 

about well my eyes are about 3 feet from the window, and it didn't 
quite fill it. 

CAPCOM Rog. 

SC You know, a sight like that goes a 

long ways to make tomato soup taste good. 

CAPCOM Yeah, that's what I've heard. 

SC Don, I hate to belabor the point, but 

I would appreciate if the guys that are working on the RCS 
budgeting and all could take a look and see if they could 
determine if there was any place where we were going over 
more than what they might have expected from that phase. 

CAPCOM Okay, we'll have them take a look. 

CAPCOM Okay, Ken, for your info, they said 

you were slightly ahead following LM extraction and 
apparently we used a little excess during the P23s. 

SC Okay. Th a t s t an ds t o re as on . B ut n o t 

being able to see the reticle on there is a real nuisance. 
You can do it. I guess there is also a certain amount of 
getting used to the nack of flying that thing around. For 
some reason, it seems a little bit different to find the 
attitude than it was in the simulator; but the biggest 
nuisance was the inability to see the reticle, but if 
that's where we used our extra, that's gine 

CAPCOM Okay. 

CAPCOM And 16, I've got P37 block data for about 

4 different times for you when you're ready to copy. 



APOLLO 16 MISSION COMMENTARY Mlblll CSTOO:57 GET 1 3 : 0 2 MC- 7 A / 2 

SC Okay, we'll get it in a few minutes 

CAP COM Rog. 

END OF TAPE 



APOLLO 16 MISSION COMMENTARY, 4-17-72, CST 01:23, GET 13:29 75/1 

CAPCOM 16, Houston, we're standing by on this 

2 37 block data pad anytime you're ready. 

END OF TAPE 



APOLLO 16 MISSION COMMENTARY hjll/ll CS T 01:57 GET 13:59 MC-76/1 



P AO This is Apollo Control at lA hours and we're 

ir. the process of a shift handover here in Mission Control. 
Flight Director Jerry Griffin and his team of flight controllers 
coming on now to relieve Pete Frank team. And we do expect to 
h£ive a change of shifts press briefing. That will begin in about 
If minutes and will be held in the MSG News Center Briefing room, 
Apollo 16 at the present time is 66 450 nautical miles from earth 
and the spacecraft velocity is 6990 feet per second. 

SC Hello, Don you still there? 

CAP COM Hello, 16. Houston. 

SC Huh, it'sanewface. 

CAP COM Roger, we just changed over down here. How's 

tfiings going. 

SC Hah, this is really a ball Henry. The - - 

as much as I hate to say it this PTC doesn't look so red hot 
to us. Could you give us any clues whether it's going to hack it 
o !• not. 

CAPCOM Okay. Stand by. 

CAPCOM 16, Houston. We don't see anything down here 

tfiat's causing it to diverge, but it does look marginal. We're 
going to keep an eye on it. 

S C Ok ay . 

SC Houston, Apollo 16. Over. 

CAPCOM Apollo 16, Houston. Go ahead. 

CAPCOM Apollo 16, Houston. Go ahead. 

SC 16. Over. 

CAPCOM Apollo 16, Houston. Go ahead. 

SC Roger. We just cycled the H2 fans as 

per pre-sleep checklist. And fan number 3 was still in auto. 
Do you want to leave it in auto tonight? Over. 

CAPCOM That is affirmative. Leave it in auto. 

SC Okay. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4-17-/2 GET 14:10 CS T 02:04 MC-77/1 



CAPCOM Apollo 16 Houston, the block data -- P37 

block data for the updates book whenever you're ready. 

Oh yeah, wait one. Okay Hank go ahead. 

CAPCOM Okay, that's 4 -- 4 blocks. I'll just 

read them in succession. 02500 49 er 07, minus 165 07045 
03500 7454 minus 165 07013 04500 5857 minus 165 09 er 431 
05500 4879 er minus 165 11841 and these all assume no midcourse 
2 . 

SC Roger, 02500 4907 minus 165 07045 0 3500 

7454 minus 165 0 7013 04500 5 85 7 minus 165 09431 05500 4879 er 
minus 165 11845. 

CAPCOM Rog. That last number was 11841. 

SC Okay, 11841. 

CAPCOM Apollo 16 Houston, we want to still keep 

working on this SPS guaging problem. We'd like to get a read- 
out if we could on your SPS fuel and oxidizer pressures. 

SC Okay, standby. Okay, that fuel pressure 

is reading right now 168, oxidizer pressure is in the green 
and it's reading 186 or 87. 

CAPCOM Roger understand, 16 8 and 186. 

2C That's affirm isn't it andwewere told 

this morning before launch that that was nominal. 

CAPCOM Roger, 

We got because of bias in guage -- so we're 
probably going to need some kind of -- another delta P figure 
to go on our LOT card -- our midcourse card. 

CAPCOM That's affirmative and it's in work, 

SC Yes sir. And I think we show we have 

just at 15 percent waste water, but we are going to go ahead 
and clorinate unless you think the ECOM's don't want that. 

CAPCOM Standby Ken. 16 Houston we're not sure 

we understand your question here. If you're asking if it's 
okay to chlorinate the portable, that's good. 

SC Okay, just wanted to make sure if you ever 

need a water boiler, people don't like to put the chlorine in 
there, so I just thought I'd check with you before I did 
i t . 

CAPCOM Okay, I copy now. They say still press 

ahead Ken. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY ^/lljll GST 02:16 GET 14:22 MC-78/1 

SC Okay, Houston, we'ij_ run the cabin 

pressure up to 57 as par this presleep checklist. 
CAP COM Roger. Copy. 

CAP COM 16, Houston. When you changed the 

lithium hydroxide canister, we noted a small drop in the 
suit and pressure Delta P down here. Did you change any 
of the configuration in the suit lo3p at the time you did 
that? 

SC Well, Henry, some time back there dur- 

ing the day, I opened up the flow lint to i^y hoses that 
had been turned off, then laid around to try and get some 
better ventilation in here. But I don't remember whether 
that was about the same time or not ■ 

CAPCOM Okay. We're not concerned, we're just 

trying to answer the question. That's probably what it 
was . 

PAO This is Apollo Control. The change 

of shift press briefing momentarily to begin in the small 
briefing room in the News Center; any air-to-ground 
conversation from Apollo 16 will be recorded for playback 
at the conclusion of the Press Conference. At 14 hours 
32 minutes ground elapsed time, this is Apollo Control. 



END OF TAPE 



APOLLO L6 MISSION COMMENTARY CDT 02:36 GET 14:42 MC-79/1 



PAO This is Apollo Control. During the - just 

completed press conference some minute and iialf of tape from the 
air-ground from Apollo 16 was accumulated. We'll play back that 
tape at this time and rejoin any subsequent conversation 
prior to the time the crew goes into their 8 hour rest period. 
At 14 hours 43 minutes playing back tape and going live this 
is Apollo Control. 

you folks, vou ready for a VERB 74. 
by. 

We're ready Ken. 
that ? 



S C 

CAPCOM 
CAP COM 
MATTINGLY 
CAP COM 
traverse vector 
SC 



up 



Thank 
S t an d 
Ok ay . 

H OV7 ' s 

Apollo 16, 
ar ound 5 9. 
All right. 



Houston. We're showing you 
Re check your 02 flow. 



re 



It 



of: 



S C 

CAP COM 

SC 

per the pre-sleep checklist. 

CAPCOM 
min ute 16 . 

CAP COM 
c on f i g ur e d . 

SC 

and the H2 heaters 

CAP COM 

CAPCOM 
anything to report 

SC 

CAP COM 
S C 



Houston, 16. Over. 
Go ahead. 

Roger. We've turned the voice off as 



(garbled) Will you stand by just a 
16, Houston. Do you have your 02 heaters 

& 2 is off, 3 



IS in auto 



This is frr Ken, do you have 



Alpha, alpha. 



That's a 70mm , 



That's affirm. 1 
are both in auto. 
Ro ge r ■ 

Apollo 16, Houston, 
on your film status? 
That's in work Henry. 
Okay . 

Gee, Henry, I'm 16mm magazine. 
We have approximately 20 percent remaining. 
CAPCOM Copy. 

SC N on magazine November, November, 

We're up to frame 33. 

CAPCOM Okay. 

SC Andonoscar, oscar, it's frame 

CAPCOM Roger, 18. 

SC And Henry, we are going without (garbled) 

and what do you think about PTC. 

CAPCOM Roger. The first part of your transmission 

was blocked out. We had a antenna swtich. However, on the PTC, 
(garble) thinks it will go throughout the sleep period and then 
we'll reinitialize after you wake up. He don't think it'll go 
a full 16 hours but it's good for the sleep period. 

SC Okay. The first thing you said we'd go 

without the tone booster. We'll go normal comm, okay. 



18, 



APOLLO 16 MISSION COMMENTARY 1^/11/12 CDT 02:36 GET 14:42 MC-79/2 



CAPCOM 
S C 

CAPCOM 
Jul let t , Juliet t . 

SC 

CAP COM 



Okay . 

That's for caution and warning. 

And Ken, did you use anything out of mag 

That's negative. 
Ro g e r . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4-16-72 GET 14:54 CST 02:53 MC-80/1 



SC Okay Henry, are there any onboard readouts 

that you folks would like to have? 

CAP COM Negative Ken, I think we're all in good 

shape here, everything looks good at this point. You got any- 
thing else for us? 

SC No, I just looked at my hand, I've got 5 

and a half minutes to go to sleep. 

CAPCOM Rog. Why don ' c you take that. Y ' all 

did a real good days work. Only 2 things left to do is those 
2 COMM switches, the squelch and the normal mode voice. Get 
a good nights sleep and we'll see you tomorrow. 

SC Yes sir, this is — this doesn't come in 

the work category. 

PAG And the communications officer here in 

Mission Control is reported that the crew has Indeed turned 
off the voice switch onboard the spacecraft — are settling 
in for a nights sleep. The spacecraft analysis status report 
dated at 14 hours ground elapsed time, less than an hour ago. 
Most of the entries state no change or performance is normal. 
For example, in propellant usage in the CSM reaction control 
system propellants, they are now 349 pounds over the predicted 
budget for this time in the flight. Fuel cells are working 
normally. All the cryogenic tankage in are normal condition. 
The S-band high gain antenna was stowed at 12 hours 48 minutes 
prior to the time they set up the rotisserie or passive thermal 
control barbecue mode in which they spin at about 3 revolutions 
per hour to stabilize the thermal response of the spacecraft. 
Although their quantities of hydrogen and oxygen are well 
within predicted limits, batteries are all up operating nor- 
mally, with the required amp hours loaded. About a half hour 
ago, there was a brief discussion of a change -- a slight 
change or drop noted in the suit compressor delta P or dif- 
ferential pressure when they changed the lithium hydroxide 
canister. These lithium hydroxide canisters scrub the carbon 
dioxide from the cabin atmosphere. There was no concern 
voiced however, by the flight control team and it was merely 
a matter of curiosity. Apollo 16 now 70,213 nautical miles 
out from Earth, velocity 6,744 feet per second, crew is signed 
off for the night and unless some reason arises to talk either 
back to Mission Control or for the flight control team to 
contact the crew, we shouldn't hear from them for the next 
8 hours. At 14 hours 58 minutes ground elapsed time, this is 
Apollo Control. 



END OF TAPE 



APOLLO 16 MISSION COKMENTARY kill 111 CST 3:55 GET 16:01:00 MC-81/1 



i'AO Tills is Apollo Control, 16 hours and 

1 rriinute ground elapsed time. The crew of Apollo 16 having 
sume 6 hours 5 8 minutes remaining in their programmed sleep 
period. About 20 minutes ago, the Flight Surgeon reported 
that from his biomedical telemetry none of the crew was 
asleep at that time and that apparently Mattingly, because 
of a somewhat higher heart rate, was probably doing some 
exercising. For triose persons who are interested in num- 
bers and statistics, the half-way point in distance for 
Apollo 16, that i from surface tu surlace, Earth-Moon, 
will take place at a ground elapsed time of 25 hours 20 
minutes, when the distance to both bodies. Earth and the 
Moon, will be 104,676 miles. The half-way point in time 
between lift-off and lunar orbit insertion will be at 
37 hours 14 minutes and 18 seconds, at which time the 
Spacecraft will be 135,502 miles from Earth and 78,778 
miles from the Moon. The so-called sphere crossing, where 
the Spacecraft leaves the Earth's influence and enters 
into the Moon's gravitational influence - this is an 
arbitrary point in space, actually, where the displays 
here in the Control Center become Moon referenced - will 
take place at 59 hours 13 minutes 26 seconds, and the 
distance from the Earth will be 178, 646 miles; from the 
Moon, 33,820. Midcourse correction burn number 1 was not 
done, and the present predicted change of velocity for 
Midcourse 2, should the option be exercised for a maneuver 
at this time, would be 12.7 feet per second, a 2 second 
burn with the SPS. This would be at 30 hours 39 minutes; 
however, no decision on Midcourse 2 has been made and prob- 
ably won't be for many hours to come. Apollo 16 presently 
is 74,420 nautical miles out from Earth, continuing to 
decelerate. Velocity now is 6,487 feet per second. And 
at 16 hours 4 minutes ground elapsed time, this is Apollo 
Cont r ol . 



END OF TAPE 



APOLLO 16, MISSION COMMENTARY, 4-17-72, CST 4:55 A.M., GET 17:01 82/1 

PAO This is Apollo Control at 17 hours one 

minute ground elapsed tine, slightly under 6 hours remaining 
now in the Apollo 16 crew rest period. The spacecraft is 
now 77,898 nautical miles out from Earth, velocity now 
6,288 feet per second. In in a continuing refinement of the 
predicted S-IVB impact statistics, we We have yet another 
set of numbers, the lastest predicted impact for the S-IVB 
stage on the lunar surface is at .93 north latitude by 
22.35 west longitude at a ground elapsed time of 75 hours 
6 minutes 22 seconds. These figures likely will be updated 
as more tracking is obtained and processed on the S-IVB. 
Apollo 16 continuing passive thermal control mode, PTC barbeque 
roll. No further communications from the crew of Apollo 16 
since they signed off sometime ago, and at 17 hours 3 minutes 
ground elapsed time, this is Apollo Control. 



END OF TAPE 



APOLLO 16, MISSION COMMENTARY, 4-17-72, CS T 6:55, GET 19:01 83/1 



PAO This is Apollo Control, 19 hours and one 

minute ground elapsed time into the mission of Apollo 16. 
Apollo 16 presently 84,895 nautical miles out from Earth. 
Velocity 5,920 feet per second, continuing to decellerate. 
While it may be a little premature the spaceflight meteorology 
group here in mission control is already forecasting that 
the splashdown weather conditions some 12 days away here 
are going to be good. Possibly a few rain showers in the 
aiea near Christmas Island, some 4 hours remaining in the 
crews sleep period. Spacecraft still in the passive thermal 
ccntrol mode, and will be in that Bar-B-Que role for a total 
of about 16 hours. At 19 hours 2 minutes, ground elapsed time, 
this is Apollo Conttrol. 



EKD OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/17772 CST 7:55 GET 20:00 84/1 



PAD This is Apollo Control, 20 hours 

I minute ground elapse time in the mission of Apollo 16. 
Some 3 hours remaining in the scheduled sleep period for 
the crew. Spacecraft now some 88 262 nautical miles 
distant from earth. Velocity now 5 75 5 feet per second. 
The numbers for the predicted S-IVB impact continue to 

vary as the tracking is further refined. The latest numbers 
from the Flight Dynamics Officer give an estimate of 
impact at 2 degrees 16 minutes north latitude by 23 degrees 

II minutes west longitude, with an impact time of 75 hours 

7 minutes and 4 seconds ground elapsed time. And this will 
likely change several more times before the actual impact. 
At 20 hours 2 minutes ground elapsed time this is Apollo 
Cont rol . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hllljll 8:55 AM CST 21:01 GET 85/1 



PAO This is Apollo Control at 21 hours 

1 minute ground elapsed time into the mission of Apollo 16. 
The Apollo 16 spacecraft is now 91 524 nautical miles out 
from Earth. Velocity now 5602 feet per second. Apollo 16 
crew at this time apparently all sleeping rather well. They 
signed off just before 3 AM CST for the scheduled 8-hour 
sleep period. According to flight surgeon Dr. Sam Pool, 
Young and Mattingly were awake for perhaps an hour past the 
slgnoff time and Duke still 1 hour beyond that. Only two 

of the crewmen are hooked up to the biomedical telemetry, 
but as Dr. Pool mentioned apparently all three are asleep. 
But it's not too easy to determine the quality of sleep from 
the telemetry that he sees on the flight surgeon's console. 
The best description of the quality of the sleep is from the 
crewmen themselves after they wake up. And at 21 hours 

2 minutes ground elapsed time, this is Apollo Control. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kllljll CST: 2:55 GET: 22:01 86/1 



PAO This is Apollo Control. 22 hours 1 minute 

ground elapsed time in the flight of Apollo 16. Here in Mission 
Control, the flight control team of Gene Kranz is being briefed 
for the next 8 hour shift, as Gerry Griffin's gold team plans to, 
makes preparations for retiring until tomorrow morning. There 
will not be a change of shift press briefing with the gold team 
flight director and as much as the entire shift with the exception 
of about the first 30 minutes have been, consisted of the crew 
being asleep. Distance at this time, Apollo 16 is 94,738 nautical 
miles out from earth approaching the moon at 5 , 458 feet per second, 
Total spacecraft weight 103,078 pounds. At 22 hours 2 minutes 
ground elapsed time, this is Apollo Control. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kl \ll 11 CST 10:21A GET 22:28 87/1 



PAO This is Apollo Control Houston at 

22 hours and 28 minutes ground elapsed time. The handover 
in Mission Control between the 2 Flight Control teams has been 
completed. The team of Flight Controllers headed by Gene 
Kranz are all now onboard. Our CapCom for this shift will 
be astronaut Tony England. We presently show Apollo 16 at 
an altitude of 96 103 nautical miles from earth and travel- 
ling at a velocity of 5399 feet per second. Our clock in 
Mission Control shows that we're approximately 31 minutes 
away from time of crew wakeup. At 22 hours and 2 8 minutes 
continuing to monitor, this is Apollo Control Houston. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kjlljll 10:51 a.m. 88/1 

This is Apollo Control Houston at 22 hours 

57 minutes ground elapsed time. Our displays presently show 
Apollo 16 at a distance of 97,619 nautical miles away from the 
earth and traveling at a speed of 5,334 feet per second. 
We're about 2 minutes away now from scheduled time of crew 
wakeup. We'll leave the line up at this time as a means of 
picking up conversation as it transpires. We're at 22 hours 

58 minutes ground elapsed time. This is Apollo Control Houston. 

This is Apollo Control Houston 23 hours 
and 3 minutes ground elapsed time. We're still standing by 
awaiting Tony England's call up to the crew of Apollo 16. We 
presently show Apollo 16 at a distance of 9 7,906 nautical 
miles away from the earth. Velocity now reading 5,322 feet 
per second. 

^ ^'^ Standing by now awaiting Cap Comra Tony England's 

call to the crew of Apollo 16. This is Apollo Control Houston 
at 23 hours 4 minutes into the mission. 

Apollo 16 Houston. Apollo 16 Houston. 
Glad there Houston. How you doing? 
Hey, you sound good. Good morning up there, 
CC How are you doing? 

SC Great, 



CC 

S C Go od w o rk 



Good all your systems look, 



Good show. Everything looks fine up there 

from down here. 

Oh, y.es. It sure beats work. 



CC 
SC 
CC 



but I've got a tin ear 



How are your comrades doing? 
Oh, they are just starting to stir. 
I'd hum something for you to wake you up 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY CST 11:01 hillfll 89/1 



Apollo Control, Houston, 23 hours 9 minutes 
ground elapse time. The Apollo 16 presently 98 222 nautical 
miles away ii oio the eartn. The velocity now is reading 
f'309 feet per second. 

-''AO This is Apollo Control, Houston, 23 hours 

and 16 minutes at ground elapsed time. Apollo 16 now 98 558 
nautical miles away from the earth and traveling at a speed 
of 5 295 feet per second. Very little conversation with 
Apollo 16 thus far, however, the wakeup call has been placed 
tmd we'll standby :n; d continue to moiiitor. We're at 23 hours 
16 minutes at ground elapsed time and this is Apollo Control, 
H ous t on . 

SC Houston, 16, over. 

CAPCOM Go ahead, Chuck. 

SC The commander ate a sandwich and his 

orange juice and his P RD is 2202 8 and he had seven hours 
of sleep. Best ever in space flight. No medication .3 voids 
24, 20, 18, fluid intake, total 21 ounces, over. 

CAPCOM Okay, we got that, Charlie. 

SC Okay. For Ken he had from VO C everything 

but the pecan and he ate a sandwich and his orange juice. His 
PRD is 15030. Six hours in the eight-hour period but was awake 
every once every hour. Okay. Excuse me. 

CAPCOM Okay. 

PAO We're switching OMN I ' s at this time. That 

is Charlie Duke with the post-sleep report. 

SC (garble) and 13 ounces total intake. 

CAPCOM Okay, Charlie, could you say the void 

again on Ken ? 

SC One was timed 41 seconds; the other 

one was (garble) due to a malfunction bag. And we got on 
me now for my meal. I had the sandwich and the orange juice 
that was in the soup. For meal C, I had ham and spaghetti, all 
the ambrosia and the cocoa. My PRD is 2 1040. I got about 
five hours sleep, and 2 voids of 20 and 25 with about a 20 ounce 
fluid intake, over. 

CAPCOM Okay, I got it all. Sounds like you all 

slept pretty good. 

SC Well, it was off and on for me. I must 

h ave been ... 

CAPCOM I tell you, I'd be so excited, I wouldn't 

sleep at all . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/17/72 CST: 11:23 GET: 22:29 90/1 



CAPCOM Apollo 16, Houston. 

CAPCOM 1 tell you 

CAPCOM I tell you I'd be so excited I wouldn't sleep 

at all. 

PAO This is Apollo Control Houston. 23 hours 

32 minutes ground elapsed time. Apollo 16 now 99,379 nautical 
miles away from the earth. Now traveling at a speed of 52 hundred 
61 feet per second. 

SC Houston, we charged your battery A. And on 

that food Tony, add ray apricot cubes. I just ate their.. 

CAPCOM Okay, Charlie. 

CAPCOM Charlie, Houston. 

SC Go ahead. 

CAPCOM Okay, on that fluid consumption there, the 

numbers you gave were in ounces. Could you verify that's ounces 
and not bags? 

SC S ay th at again , T on y . 

CAPCOM In the fluid you've consumed — the drinks — 

you gave the numbers in ounces, and I guess the blank here is 
listed in number of bags and partial bags, and they just want to 
verify the fact that the number you gave was in ounces, and also 
to check and see what unit you want to use for the rest of the 
mission on that, so everybody will have it straight. 

SC Okay, we'll use ~- we'd like to use ounces and 

that's what we'll go with. 

CAPCOM Okay. 

S C That' s what I read. 

CAPCOM Okay, I understand. Thank you. 

SC The, the menu side of it, the things that 

are in the menu's are in - 

CAPCOM Okay, we understand. 

PAO This is Apollo Control Houston. 23 hours 

42 minutes ground elapsed time. That was lunar module pilot 
Charlie Duke talking to CAPCOM Tony England here in Mission 
Control clarifying one point in the post- sleep report. We 
presently show Apollo 16 at a distance of 9 9,9 23 nautical miles 
from the earth, and traveling at a speed of 52 hundred 38 feet 
per sec on d. 

SC Okay, we can see the earth out there, and 

it's getting a good deal smaller. It's about the same size as 
the moon, almost out the other window. And Africa is clear this 
morning. At least the part that we can see which is what's 
easily clear right around from the Canaries on. 

CAPCOM Very good. We've got you about a little over, 

well you just passed 100,000 miles on our chart here. 

SC I would guess we're about a 100,000 miles 



APOLLO 16 MISSION COMMENTARY kllljll CST 11:23 GET 23:29 90/2 



CAPCOM Well, sounds like a milestone. They say 

you're only 14 miles up, John, you're going to have to recalibrate 
your eyeball. 

SC Okay, from our point of view, you only got 

a little more than half an earth. 

CAPCOM Oh, that's right. We forgot you're kind of 

h an di cappe d . 

SC (Garbled) 

PAO This is Apollo Control Houston. At 23 hours 

51 minutes ground elapsed time. Apollo 16 now 100,355 nautical 
miles away from the earth, and now traveling at a speed of 

52 hundred and 20 feet per second. It's been a very quiet day 
thus far for the crew of Apollo 16. We've heard from them with 
their post sleep report, and aside from a brief commentary by 
John Young on his view of the earth, we've heard little else 

at this point, but we'll stand by and continue to monitor. This 
is Apollo Control Houston at 23 hours 52 minutes ground elapsed 
time . 

CAPCOM Ken, Houston. 

SC Go ahead, Houston. 

CAPCOM Okay, I've got a systems status report when- 

ever your comfortable and would like to hear it. There's nothing 
to write down on that. 

SC Okay, can we stand by awhile. 

CAPCOM Sure, no hurry at all. 

SC Thank you much. 

CAPCOM Okay, just give me a call when you're ready. 

SC Alrighty. 

PAO This is Apollo Control Houston at 24 hours 

5 minutes ground elapsed time. Apollo 16 now 101 ,035 nautical 
miles away from the earth. The velocity now reading 51 hundred 
93 feet per second. During this period of relative calm and 
quiet, we'll pass along a brief update to our status on the crew 
report of last night of a, of particles emitting from the lunar 
module in the vicinity of the aluminum closeout panel which 
covers the MYLAR insulation over the RCA system number, system A. 
The panel in question is 50-56 aluminum .004 Inches thick with 
a ,001 coating of white silicone paint. The paint is applied and 
baked for one-half hour at 400° F. Grumman aircraft engineering 
has been checking the paperwork on the panel to see if its 
processing has been different than that before, making a thermal 
analysis to see If the mission could possibly be affected by the 
situation. The analysis shows the flaking will not affect the 
mission. Preparing a test plan to conduct on a simular panel that 
is being flown to Grumman from the Kennedy Space Center, tests would 
be expected to include such things as wiping the finish with 
different solvents and then to simulate flight vacuum and 
temperature conditions at an altitude chamber. The paint on 



APOLLO 16 MISSION COMMENTARY MHjll CST 11:23 GET 2 3:2 9 90 /3 



PAO this panel is applied to 8 panels on each 

side of the lunar module. The coating is applied to handle the 
thermal conditions on the moon in the event of a T plus 2A hour 
launch when the sun angle of the Moon would be higher. We're 
at 24 hours 7 minutes ground elapsed time. We'll continue to 
monitor for any conversations with the crew of Apollo 16. This 
is Apollo Control Houston. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k ! \1 1 11 C3T 12:01 GET 24 : 07 91/1 



PAO This is Apollo Ccntrol Houston at 24 hours 

14 minutes ground elapsed t une, Apollo 16 now 101,502 nautical 
miles away from the eartn, and traveling at a speed of 51 hundred 
73 feet per second. We presently snow the spacecraft weight at 
103,078 pounds. We'll stand by and continue to monitor any 
conversations that might taka place botv/een the crew of Apollo 16 
and our CAP COM in Mission Control, Tony England. 

PAO Stand by to con;inue to monitor. 

SC (Garbled) 

CAPCOM Okay. That souads good. On the systems 

status, the RCS , everything looks fine. Your 2 7 pounds ahead 
on your usage. Must have a very light hand on the throttle there. 
Okay, and on the ECS, okay, the failure mode most probably in the 
control electronics. The valve is driving at max rate that's 12 
seconds full open to full close, and they saw that on the TM by the 
flow rate. I don't recommend making any sensor changes since that 
doesn't seem to be the problem, and thermal runs are being made here 
at this time to determine the settings for the lunar orbit. They 
don't anticipate any problems with it. 

SC Okay. I kept watching it since we've set it. 

We haven't touched that thing now for a long time and maybe I just 
haven't caught any of the extremes, but it looks like it's been 
holding nicely between about 45 and 50. 

CAPCOM Right. We concur. We don't think your going 

tD have to touch it until you go to the dark side. - steering 
translunar coast to helium in the SPS oxydizer tanks is absorbed 
by the oxidizer causing a decrease in oxidizer tank pressure. 
Your transducer hasn't indicated this and there maybe a problem 
with that transducer. We've got a procedure change that I'll 
give to you later and your flight plan update prior to the midcourse 
2 that allowed them to check that transducer. 

SC Okay, Tony, and is there any changes in the 

midcourse 2 time or is It going to be like the flight plan. 

CAPCOM Right now it looks as per flight plan. 

Okay, and on your DSE tape, Hank had a chance to take a look at 
it. Said it sounds fine. Dick will be in a little later and 
listen also, so everything looks go for the operations lunar orbit. 
And everything else looks great. Kink of nice not to have much 
to say here. Sure isn't like the sims. 

SC Yea, I hope we've flown the last sim. 

CAPCOM Right. I got a little - 

SC Man, you just said it all. 

CAPCOM That's right. I went through the news. I 

don't know whether you guys over you coffee would like to read 
the news paper, but I've got all the news that's fit to print, 
and I really don't have much to say. A great piece here is in 
the world of art. One of Vincent Van Gogh's best was stolen from 
a stand in the San Diego's art gallery as part of a display that 



APOLLO 16 MISSION COMMENTARY klnill CST 12:01 GET 24:0 7 9 1/2 



CAPCOM was named 

input from Dottle here for Ch; 



out of sight", and I've got 



S C 

CAPCOM 
so you've got ! 

S C 

CAPCOM 
up date we h ave 



When 
send 



all 
an d 

p ad . 



ever you re 
them on up . 

SC Okay, 

CAPCOM Okay, 

SC Tony, 
the things you had to 
clean out here, you'd 

CAPCOM We'll 



Go ahead. 

Okay, she said your five bird eggs have hatched 
new healthy neighbors. 

Oh great, thank you. 

Your welcome. Okay, and on the flight plan 
items and there's no hurry to get them up there, 
ready to take them and write the stuff down, I'll 



why don't you give 
that'll be fine, 
you'd enjoy seeing 
go through to keep 
never recognize it. 
, it probably looks 



us 10 minutes or so. 

th is p 1 ace . Af t er 
the cockpit nice 

like any any bachelors 



S C 
P AO 

ground elapsed time 
form the earth, and 
per sec on d. 
S C 

CAP COM 
CAP COM 
SC 

CAP COM 
CSM updates . We ' 11 
in there, 

S C 

CAPCOM 
f i rs t one . 

SC 

CAPCOM 
It h as the 



(Garb led) 

Apollo Control Houston. 

Apollo 16 now 101,860 
traveling at a speed of 

What's the plan update? 
Oke.y, stand by a second 
Charlie, Houston. 
Okay . 

On the flight plan 
make a change to a 



24 hours 22 minutes 
nautical miles away 
51 hundred 59 feet 



Ch ar 11 e 



update, you can dig out 
couple of procedures 



your 



The flight plan or the update book. 

Okay, this will be in the update book, this 



EMP 



Set. 
Ok ay , 
p ro g r ams . 



go to the section on flight plan update. 
Okay, we'd like you to add a 
last step to each of the four EMP probe procedures. So that 
would make a four step on the shortened P23 and seventh step on 
manual range input, etc. 

SC Okay, stand by Tony. They must have a hand 

over. You were cut out. Start over again please. 

CAPCOM Okay, understand. Alright, in the flight plan 

update section, on the 4 EMP program, we would like for you to 
add a fourth, correction, a final termination procedure to each of 
the four programs. So on the shortened P23 we would have a step four, 
which reads VERB 25 NOUN 26 enter, and then the four registers 
Bter all balls, correction, three registers enter all balls. 

SC Okay, copy. 4 step for P23 is VERB 25 NOUN 

26 enter all balls in all registers. 



APOLLO 16 MISSION COMMENTARY k 1 1.1 j 11 CST 12:01 GET 24:07 91/3 



CAPCOM Okay, and on the next program the manual range 

input step 7 would be the s air.e thing. 

SC Copy manual range input step 7 to VERB 25 NOUN 26 

ente;r, all balls. 

CAPCOM Okay, and on the opcics angle to body angles, the 

late^r step 7 and it would be the same as before. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY GST 12:26 GET 24 : 32 92/1 



CAP COM Okay, ar.d on the jet monitor program, 

it'll be a step 6, the same thing. Okay, the purpose for 
these was to protect the E memory from other programs. 

SC Okay, 

CAPCOM Okay, the next change is to your SPS 

burn rules. So if you can get that card. 
SC (garble) 

CAPCOM Okay, on the fuel oxidizer pressure 

should read - or does read greater then 115, will you change 
it to read 124 for oxidizer, 110 for fuel. 

SC Okay, pressure greater then 115 is 

changed to 124 oxidizer, 110 fuel. 

CAPCOM That's correct. And in the fuel to 

oxidizer DELTA P it reads less than 20 psi. We'd like to 
change that to 35 psi, oxidizer greater than fuel or 5 psi 
oxidizer less than fuel. 

SC Copy. 35 oxidizer greater than fuel, 

5 oxidizer less than fuel. 

CAPCOM Okay, and the final part of that is in 

the types constraints there in the box. It says greater 
than 160 and greater than 80. We'd like to change that to 
greater then 16 8 oxidizer and greater than 153 fuel. 
SC (garble) oxidizer, 153 fuel. 

CAPCOM And I guess on that types constraints 

also, it's the chamber pressure, it says greater then 80 
for the type constraints. Okay, and that's the end of that 
procedure. A note here that this assumes a good oxidizer 
transducer. And there may be a problem that it's hung up. 
And we'll have a little later change in the midcourse 2 burn 
procedure. And from this we'll be able to tell what - where 
the problem is. I'll get that up to you as soon as they've 
sorted it out here. Okay, and there are 2 notes here. For 
Ken, a reminder to watch the UV film consumption magazine 
Oscar Oscar. He's right on the budget now and there's no 
p ad . 

SC Roger. And there's no way to cut a 

film out. 

CAPCOM I understand. 

SC Now, we're being tight Tony, if you see 

us slip behind, I guess I don't know what to do about it - 
you'll have to come up with a recommendation of what other 
photo to delete, 

CAPCOM Okay, well we just thought we'd let you 

know that you had a 2 frame pad and we've already used it. 

SC You mean we've taken 2 frames we weren't 

s upp OS e d to? 

CAPCOM I don't understand the note here. That 

was the note I got. Maybe it was used up before they loaded it 



A?OLLO 16 MISSION COMMENTARY klXljll CST 12:26 GET 24:32 92/2 



CAP COM or s;j me thing. ' 1 1 find out. 

SC As far as I know, Tony - yes, I 

jast want to make sure that there's no misunderstanding on 
our part about what it is we're supposed to do because we 
t^ok only those frames that were selected cause we are aware 
of the tight budget. 

CAPCOM Okay, understand. 

SC Andwemightbeoff alittlebiton the 

njmbers we gave you» cause you know that counter's kind of 
gross and it's ea.^y to get off by a i i or so, particularly 

when you start at the low end. 

CAPCOM Alright, understand. I missed more 

than a number. Okay, and a last note. We'd like you to 
take a look when you get a chance at the LM thermal surface, 
and see if you notice any changes or can give us any more words 
on it. We really don't anticipate a problem there, it turns 
out in looking back, there is a history of one batch of bad 
paint and they sort of think it is just the paint blistering 
up. And it doesn't seem to be - 

SC Alright - 

CAPCOM On the surface that'll give us a 

real bad problem. 

SC Okay, we're ready to bring up the high 

gain if you've got some angles for us. 

CAPCOM Okay, I'll get taem. Okay, we'd like 

you to stand by for 10 minutes on that high gain. 

SC Right. 

PAO This is Apollo Control Houston at 24 hours 

3!) minutes ground elapsed time. Apollo 16 now 102 739 nautical 
m:.les away from the earth, and traveling at a velocity of 
5123 feet per second. 

CAPCOM Charlie, Houston. 

SC Go ahead. 

CAPCOM Okay, on the high gain, we'd like you 

to select PITCH minus 40, YAW plus 90 and the beam width 
in narrow, and we'll give you a cue to switch over to the 
high gain. 

SC Okay, you've got them selected. You 

are going to cue us you say? 

CAPCOM That's affirmative, we'll give you a 

CTie . 

S C Ok ay . 

CAPCOM Charlie, Houston. 

SC Go ahead. 

CAPCOM Okay, we'd like you to go re acq ui s i ti on 

now and we'll command. 

SC Say again? 



APOLLO 16 MISSION COMMENTARY ^ / lb ! 11 GST 12:26 GET 24:32 92/3 



CAP COM 
SC 

CAP COM 

S C 

layer of brass that 



We'd like you to go re acq ui s i t i on now. 
Ok av , you've got react and high gain. 
Ok ay . 

Okay, Houston, to discuss that thermal 
we've got throwxng on the - throwing 
just outside the docking target. It's thinned out a pretty 
good bit since last night. I think it's gone somewhere, 
but there a lot of these little square - rectangular strips 
about up to 2 inches long, I see one that must be 3 inches 
long and they just sort of look like they're glued - some- 
body glued a bunch of strips of grass onto that thermal 
shield. Most of them are gone. Where there was 10 0 per 
cent coverage before, it looks like it's about 50 per cent 
CO ve rage now. 

CAP COM Okay, we copy that. 

PAO Apollo Control Houston, 24 hours 48 

minutes ground elapsed time. That v/as John Young describ- 
ing the current status of the particles on the lunar module, 
We show Apollo 16 at 103 197 nautical miles away from the 
earth traveling at a speed of 5106 feet per second. 

S C H e y , To n y . 

to press on with a little film 

by a 



f i Im 



press on with 
CAPCOM 
SC 

CAP COM 

SC 

CAP COM 
cy c lin g 
S C 
S C 

CAP COM 
CAP COM 
SC 



down 



S t an d 
Okay . 
Okay , 
Go . 
Okay , 
to the MS FN 
Wi Ic o. 
Ok ay , 
Ok ay , 
Ok ay , 
Ok ay , 



Are you 
cy c le ? 
s e c on d , Ken 



folks ready for us 



Ken , Hous ton 
we'd 



like you to go ahead 
cue, and then call us 



on the 
back. 



Houston. How about a cue. 
stand by a second. 

Ken. Go on with your procedure 



th em , 



I'll read these out as I go through 



CAPCOM 

S C 



Al rl gh t. 

And the only thing that looked a little 
different was when I got down to the step that said Pan 
Camera mode to standby. It already was. I guess that's 
just an oversight. 

CAPCOM Okay. Okay, that's no problem. 

SC (garble) 

SC Okay, Tony. Can you read me now 

on VOX? 

CAPCOM Yes, you sound fine. 

SC Alrighty. Mapping camera is 

Stand by, Mark. Would you like to have the pan 
cell test simultaneously or would you like to do 



I ': 



on , 



coming 
came ra 

it s e q uen ce ly ? 



APOLLO 16 MISSION COMMENTARY kllljll CST 12:26P GET 2 4:32 92/4 



CAP COM 
P AO 
S C 

Mark. Barber pole 
PAG 

Mattingly checking 
camera onboard with 



Okay, we'd like it simultaneously. 
You hear - 

(garble) cell test, getting cell test, 
n ow . 

You can hear command module pilot Ken 
out the pan camera and the mapping 
the Mission Control Center in Houston, 



Tills is Apollo Control Houston at 24 hours 55 minutes ground 
elapsed time. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY .12:49 CST 24:56 GET 93/1 



PAG Apollo Control Houston at 24 hours 56 min- 

utes ground elapsed time. Apollo 16 now 103,540 nautical 
miles away from earth. 

SC Flag and the pan camera moon talk back 

and that took about 45 seconds as opposed to a minute. 
CAPCOM Okay, we copied that. 

I'm going to go ahead and take 



S C 

the pan camera 
CAPCOM 

SC 

camera to off 
CAPCOM 
SC 

CAPCOM 

S C 

CAPCOM 
SC 
S C 
S C 

selecting is 
CAPCOM 
S C 

Th ank you. 

CAPCOM 
of .8 an d John ' s 

CAPCOM 

PAO 

ground elapsed time 



getting ready to take the mapping 

here. 



Ok ay J so 
power off. 

Ok ay . 
Ok ay I'm 
center. 

Okay, I've got two minutes 
You've got a good watch. 
Right. A Mickey special. 
Okay there's our 30 seconds. 
Okay . 

Take the snack power off. 
Man that's what you call a good touch. 
Okay, Tony we're going to OMNI BRAVO and 
to high gain. L band AUX TD to OFF. 
Okay, sounds good, Charlie. 
Get Lee's junk back to PDT intercomm. 



turn e d 



on 



Okay, Tony we got the delta LM CM delta P 
the blomed now. 
Okay, we copy that. 

Apollo Control Houston. 24 hours 58 minutes 
The crew of Apollo 16 following very 
closely the timeline in the flight plan. Apollo 16 Commander 
John Young has just donned a biomedical harness as reported 
by Lunar Module Pilot Charles Duke. At 24 hours 59 minutes 
Apollo 16 is 103,686 nautical miles away from the earth. 

CAPCOM Hey, John you are giving us some great 

TV there. 

SC What did you say - what did you say Tony? 

CAPCOM I said we're getting some great TV down 

here. It looks good. 

SC Was that one of your tapes? 

CAPCOM Ah so, that's a tape, sorry about that. 

PAO This is Apollo Control Houston at 25 hours 

7 minutes ground elapsed time. That exchange between Tony 
England and Apollo 16 the reference was to a replay which had 
taken place in the Mission Control Center of the tape of 
yesterday evenings television. This picture is being studied 
by some of the flight controllers here who had not had an 
opportunity to see it before along with Dr. Robert R. Gilruth 
who was the former director of the Manned Spacecraft Center. 
We are at 25 hours 8 minutes ground elapsed time. Apollo 16 



APOLLO 16 MISSION COMMENTARY kl\lll2 12:49 CSt 24:56 GET 93/2 



now 104,123 nautical miles away from the earth and traveling 
at a speed of 5,068 feet per second. 

PAO This is Apollo Control Houston at 25 hours 

11 minutes ground elapsed time. Very little conversation is 
taking place between our CapCom Tony England and the Mission 
Control Center and the crew of Apollo 16. It is during this 
time frame however that the crew of Apollo 16 should be per- 
forming the electrophoresis demonstration and during this 
demonstration the crew will attempt onboard to prove the 
higher purity of particle migrations in zero g. Three mylar 
tabes containing microspheres are used for this activity. The 
tabes are positively and negatively charged at either end. The 
movement of the microspheres is then studied. This movement 
is documented by means of the 70 millimeter Hasselblad camera. 
This is the demonstration that was also performed during 

25 hours 12 minutes ground elapsed time, 
monitor. This is Apollo Control Houston. 
Hous ton , 16 . 
Go ahead. 

(garble) just about to pick up the power 
power on (garble) instructions from Houston. 
Okay, instructions I have there are to 
through that hold and go on down to just before 
the camera and then hold again and give us a call. 



Apollo 14. We're at 



We 



re continuing 
SC 

CAPCOM . 
SC 

cable and turn the 

CAPCOM 
press on 
s i:arting 



to 



SC 

CAPCOM 
S C 

CAPCOM 
ch an ce we'd 
quantity for 

SC 

over 100 (about 

CAPCOM Okay, we 

S C Ho us t on . 

CAPCOM Go ahead 

SC (garble) 

Ken turns on the electric 

to hold that? Over. 



Okay . 

Apollo 16, Houston. 
Say it over. 

Okay, at your convenience when 
like to read out all quads so that RCS 
correlation with a TM, 

Okay, A is 90. Bis96. 
or 102). 

copy that. 



you get a 
propellant 



Cls 96. Dls 



101 



Charley . 
Clear down 
freezes fire. 



in the step tub before 
where do you want us 



CACPCOM 
starting a camera. 
S C 

CAPCOM 
SC 

here because I've 
it in my mind what it is 
CAPCOM Rog, 
at that point you're supposed 
but if there is no indication 



Okay, we'd like you to hold just prior to 

starting the camera. 



Okay, just prior to 
Ro g on the next page. 
Okay, how about telling 
got to turn this thing on 



us where 
and I'd 



we re going 
like to have 



were going 



it's 



n o 
t o 
of 



to do . 

big deal. The note here was 
observe the current meters 
a current flow on any tube 



APOLLO 16 MISSION COMMENTARY k I \1 1 11 12:49 GST 2 4:56 GET 93/3 



you tap the box gently along the axis, parallel with the face, 
and then you allow the whole unit to fly motionless for addi- 
tional 3 to 5 minutes before proceeding. They're afraid there 
may be a bubble in one of the tubes and you don't get a cur- 
rent. 

SC Well, okay. Actually there is a bubble in 

e ach t ub e . 

CAPCOM Say that again. 

SC Actually there is a bubble in each tube. 

And it's each tube has a bubble. They are in exactly the same 
place. They are lined up in a row, and they are directly over 
meter number 3. And the bubbles are about, oh, an eighth of 
an inch in diameter. 



END OF TAPE 



AFOLLO 15 MISSION COMMENTARY hjlljll CST 1:19 94/1 



SC Okay, well actually, there is a bubble 

in each t ub e . 

CAP COM Say that again? 

SC Actually, there's a bubble in each tube 

and it's each tube has a bubble, they are in actually 

the same place or lined up in a row and they are directly 
over meter number 3 and the bubbles are about 8 of an inch 
in di ame t a r . 

CAP COM Okay, the Pi's say that's okay and we 

should go aheaJ ird proceed. 

SC Okay, now, thequestion thatyouhad for 

me was that if any of the meters do not go into the green 
you turn the power on. Did you want me to tap the box and 
then do what? 

CAPCOM Okay. The instructions were to tap the 

box gently, allow the unit to remain motionless for additional 
3 to 5 minutes and then proceed. 

SC Okay. At this time if we don't get the 

meters into the green we proceed anyhow, is that correct? 

CAPCOM According to the instructions, that's 

corre ct . 

SC All righty. 

PAO This is Apollo Control, Houston, 25 hours 

27 minutes ground elapse time. That was Ken Mattingly 
Command Module Pilot, of Apollo 16 discussing procedures 
for the electrophoresis demonstration with Gapcom Tony England 
here in Mission Control. We now show Apollo 16 at the 10,557 
nautical miles away from the earth and traveling at a speed 
of 5032 feet per second. 

SC Okay, Tony, it turns out that meter 

number 1 is just barely into the red, meter number 2 didn't 
come up quite Into the red, meter number 3 is about a needle 
width below the red. 

CAPCOM Okay. We'd like you to go on with the 

experiment . 

SC Okay, I've jiggled this a little bit and -- 

let it settle here for a second and then we'll start and 
give you marking instructions. 

CAPCOM Roger, we compare it. 

SC Okay, Houston, we've started the experiment 

and as soon as we got it rotating -- got it running, and I 
turned the course to the decal on the box which is counter- 
clockwise F rotation, and as soon as 1 did, the orange film 
disappeared and I see white particles coming through the 
screen. It looks much like a — it looks like kleenex. 

CAPCOM Okay. We copied that. Any difference 

in rate between the different tubes? 



Al'OLLO 16 MISSION COMMENTARY 4/17/72 CST 1: 19 94 /2 



SC Yeah. The first thing that happened as 

soon as I opened it, I got a big blop of this, so, (garble) 
it looks like the inside of the window here between the -- 
where it shows the decal (garble) sample 1 and 2. It's got 
a big — couple of big blops in there. 

SC Number 1 sample is opening up. Number 3 

sample is about halfway between 353. Also, have current 
meter number 1 is a degree, parameter 2 ia a degree and 
number 3 is still about a needle width below the red line. 
It hasn't move at all. The bubbles are moving at about 
the same rate as the white material and the first bubble 
in number 2 is just reached the yellow band and as I 
understand this, I'm going to have to wait until the white 
material reaches that yellow band. 

CAPCOM That's affirmative. The white material 

in the fastest tube. 

SC Okay. 

CAPCOM We had some bad comra right there in the 

middle when you were describing the rates and different in the 
three tubes of the white material. If you can say a little 
bit of that again, it might help. 

SC Okay. It's moving much more rapidly than 

I had anticipated with Tony. Right now, the number 2 sample 
is leading by about a nose. It just crossed the one - two - 
three- four fifth ring described on that center tube. The 
number three sample has just crossed the fourth one, the number 
1 sample had just crossed the fifth one now and number 2 is 
about halfway between 5 and 6. Number 3 sample is maintaining 
a very cohesive shape. It looks like a little cylinder with 
a pointed nose on it and it's maintaining its white consistency. 
And it's going, I would guess, at the rate of the group of 
particles in there that's maintaining a solid appearance is 
about the width of one of these lines. Then, it pales out to 
a very diffuse gaseous just a swirl matieral behind it that goes 
all the way back to the lexium. The master samples are diffusing 
much more rapidly and they have a little nose on them which is very 
thin and that leaves the head of the larger masses of material. 
They form sort of a cold shape and they are about two and a half 
to three ring lengths in length, and I'm talking about the distance 
between the sets of rings. And they both appear to be diffusing 
about the same amount. The number 2 sample is really starting 
to break up now and starting to twist the -- it looks like 
it's taking on a corking screw appearance as it approaches the 
yellow line, and now number 1 (garble) switch. 

CAPCOM Okay. You say there is no difference 

in diffusion between 1 and 2. 

SC Well, there wasn't when we started but 

now that we hit the reversal switch, I guess all bets are off. 



APOLLO 16 MISSION COMMENTAARY k j 11 111 GST 1:19 94/3 



SC The they've just really broken up in 

njmber 2 and then holding together a little better. They 
really looked very, very, similar, except that just as it 
cross the last ring before the yellow ring, number 2 started 
to get in the logging nose on the point and it would start 
to twist and I said it was looking like a cork screw and 
then about the same time when just about the time I hit the 
reversal switch, the sample in number 1 did the same thing. 
The sample in number 3 is doing an entirely different opera- 
tion. It is taking sort of a bullet shape all the way 
down as far as it went and now that we reversed it, the 
pointed end which was on the right side, the direction of 
motion has now become a flat blunt end and it's picking up 
kind of an arrow shaped head on the left side as it goes 
back towards the container. But it's still retaining its 
cohesiveness . The sample number 2 just really got all diffuse 
and spread around and number 1 holding together a little bit 
better. It's starting to take shape that looks very much 
like number 3 and pack D. The trailing edge, that's the 
one on the right side now, sample number 1, is just about 
caught up. It looks very much like sample number 3 except 
that you can tell that some of the material on sample 1 is 
a bit diffused. 

CAPCOM Outstanding. 

SC And we're about to approach the original 

end. Do you want me to reverse it again or what do you 
suggest at this point? 

CAPCOM Yeah, Ken. We'd like you to reverse 

it again. 

SC Okay, and I'll do that when the first 

large portion of the sample reaches the lex hand manifold, 
ifi that okay? That's -- some of the diffused material large 
on one s i de . 

CAPCOM Okay, that's sounds good. 

PAD Apollo Control, Houst on, that is Ken 

Mattingly describing the movement inside the three tubes 
for the electrophoresis demonstration. We're at 25 hours 
37 minutes into the mission. Apollo 15 now 105559 nautical 
miles out from the earth. 

SC (garble) and I reversed it when the 

pointed end of sample number 3 reaches the first marked ring 
before reaching the left end manifold. 

CAPCOM Okay. 

SC And it's starting to snake now. These 

little blobs don't seem to take this reversal so well. Anothe 
thing that was a little different on that first -- after 
I reversed it, sample number 1. I mentioned all three had 



APOLLO 16 MISSION COMMENTARY k I \1 1 IT GST 1:19 94/4 



SC bubbles who were ri gh t t o ge t h e r w h en 

we started. The bubble on the (garbled) passed over to the extreme 
right end except that number 1 when we reversed the samples, it 
was revened in the right end, numbers 2 and 3 traveled with 
the material. 

CAPCOM Okay. Copied that. 



LND OF TAPE 



APOLLO 16 MISSION COMMENTARY kill 112 1:32 GST 25 :38GET 95/1 



SC Okay, Tony number 2 has reached the end again 

I'm going to reverse it for the last time. 
CAP COM Okay. 

SC It's reversed at this time. Mark it. 

CAP COM Okay. 

SC Number 2 is completely - looks like an 

emulsion. Number 1 still has a central core that is holding 
together and number 3 is doing a good job of staying together. 
It - the dew is very little. 

CAPCOM GARBLE 2, copy t:iati 

SC Okay, and at the end of this it looks to me 

like it's so diffused that at the end of this run and if I get it 
back I'll just go ahead and secure it. 

CAPCOM Yeah, Ken, 1 think they are going to have 

fun analyzing that one. 

SC I think they've got their work cut out for 

them. Are there any questions that you might want to get 
resolved and maybe that were obvious to me but weren't obvious 
to you before we put it all away? We're going to be closing 
down here in a couple of minutes. 

CAPCOM Okay, the PI is back there and hopefully he 

is working out some questions. 

CAPCOM Jim, Houston- 

SC Go ahead. 

CAPCOM Okay, one you said that you tapped the 

box there at the beginning to try to get rid of the bubbles, 
how long did you wait before you started? I know you gave a 
mark, but we'd like to verify that. 

SC Between the time we tapped the bubbles and 

the time we started the experiment? 

CAPCOM That's affirm. 

SC Is that the time frame? Okay, that time 

frame was - I would guess it was about a minute because 
when I tapped it, I just couldn't get them to move. I had 
already - I had already tapped that thing once before, for the 
bubbles , and because well, as soon as we unpacked them x-Je saw 
the bubbles out there and I banged it a little bit to try and 
see if I could get them to move and didn't have any luck at 
all. So we didn't wait any 3 or 5 minutes on that - it was 
about 2 minutes, 1 guess. 

CAPCOM Okay, we copy that, 2 minutes. And on the 

tube 1, did you notice any separation of the two sizers? 

SC Not unless that's what this diffuse and 

central feature turns out to be. Because the dark, oh, I need to 
rephrase that, the higher concentration material that makes 
it look more solid (and that's a large particle in the diffuse 
material is the finer particles) , then I would say that per- 
haps there was a separation of small particles from larger ones 



APOLLO 16 MISSION COMMENTARY Mll/12 1:32 CST 25:38 GET 95/2 



in tube number 2 just about the time they reversed it, just 
starting to show up and number 1 perhaps the same. The number 
3 L would say if that is the proper interpretation that there 
was no appreciable separation of any of them. And I'm not 
sure that number 1 ever exhibited the symptoms number 2 did. 
I can't tell you right now which of these tubes spurted these 
blobs of particles under the window either,. 

CAP COM All right, we copy that. We - I sort of 

expected some information that I got here that 1 would be the 
one that split up in the two sizes, but I guess we'll have to 
look at that later. 

SC Okay, again, I'm not sure what this little 

burst of material that got out on the window might be maybe the 
loss of stuff from one of them. 

CAPCOM Okay. That's all the questions I have here. 

At least the bugs didn't eat the particles. 

PAO Apollo Control Houston 25 hours 48 minutes 

ground elapsed time. We've had a continuing discussion with 
Command Module Pilot Ken Mattingly on the electrophoresis 
demonstration. We now show Apollo 16 at 106,097 nautical miles 
out from the earth and traveling at a velocity of 4,992 feet 
per sec on d. 

Houston, did you get that? That was magazine 
on that experiment. 
Okay, UNCLE UNCLE 5 5 
Ro ge r . 

Apollo 16, Houston. 
Go ahe ad , ove r . 
Okay, at your convenience 
b urn procedure. 

Okay, you've got a standby on that one 
busy right now. 
Right, understand. No hurry at all. 



UU 



55 



S C 

up to frame 
CAPCOM 
S C 

CAP COM 

s C 

CAPCOM 
change to your 
S C 

Things are kind of 
CAPCOM 



T h an k you. 



w e ' ve got the 



SPS 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k/lljll CST 2:03 GET 26:09 96/1 



PAO This is Apollo Control, Houston at 

26 hours 13 minutes ground elapsed time. Lunarly no 
conversation with the crew of Apollo 16, during a good 
part of this sha.ft thus far. We now show Apollo 16 at 
107,262 nautical miles away from the earth. Velocity now 
reading 49A7 feet per second. Apollo 16's present weight 
103,026 pounds. This is Apollo Control Houston continuing 
to monitor at 26 hours 13 minutes since lift-off. 

PAO This is Apollo Control Houston at 

26 hours 33 minutes ground elapsed tine. We presently 
show Apollo 16 at a distance of 108,209 nautical miles 
away from the earth. Velocity now reads 4912 feet per 
second. We're standing by continuing to monitor, in the 
event -- we have any conversation with the crew of Apollo 
but it's been a very quiet shift. We're at 26 hours 
33 minutes ground elapsed time. This is Apollo Control 
H o us t on . 

H o us t on , 16 . 
Go ahead Charlie. 

Tony, you just went by my window, and 
it's a spectacular sight. 

Yes, I bet it is. I tell you. 



16, 



half 
w;: th 



s c 

CAP COM 

S C 

e ar th , 
CAPCOM 



man 



I m g re en 



envy 
SC 



you. 

wli en 



CAPCOM 
it went 
S C 

CAPCOM 
S C 

CAPCOM 
S C 

( garbl e) mos t 
you could see 
CAP COM 



by 



(garble) I don't want to trade with 
You say the world looked pretty good 
are we now, Tony? 



How far out 
108,285. 1. 

Say again. (garble) broken up 

Okay, 108,2 85.1. Change to .6. 

Okay thank you.... I think one 
impressive sights Tony, is 
(garble) polar ice cap. 

Very good. Have you 



the cloud 
had a ch an ce to 



of th e 

fall because 



look long enough to the dynamics at all? 



S C 

down on my side 
mornin g . 

CAPCOM 

S C 



Ne gati ve , 
That ' s the 



We just now took the shade 
first view I've had all 



Very good. 

What was that awful big storm up off the 
coast of Alaska in the Bering sea I guess it was 
yesterday. I can't see that now though. I think you all 
( garble) . 

CAPCOM I guess our weather chart doesn't go 

up that high. I was going to see what we've got there now, 



APOLLO 16 MISSION COMMENTARY k I \1 1 11 GST 2:03 GET 26:09 96/2 



CAPCOM but it only includes your recovery 

areas. We're reviewing that film that you took — that 
TV that you took last night and there are alot of sparklles 
out the window there. Were those all just loose particles 
floating around? 

SC Yes, the LM V7 as really shedding on 

that one panel there, Tony, and in fact we've still got 
quite a few particles floating along with us right now. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hJll/12 GET 26:43 CS T 2:37 MC-97/1 



PAO This is Apollo Control Houston at 27 hours 

ground elapsed time. We presently show Apollo 16 at a distance of 
109 490 nautical miles from Earth and traveling at a speed of 
4864 feet per second. Meanwhile in the Mission Control Center 
we do presently plan for Apollo 16 to perform midcourse correc- 
tion number 2. This would be at the normal flight plan time 
30 hours 39 minutes of ground elapsed time. And the MCC 2 burn 
would have a Delta V of 12.6 feet per second, and this would 
be a burn of a 2 second duration performed with the service 
propulsion system engine. We're at 27 hours 1 minute to ground 
elapsed time continuing to monitor. This is Apollo Control 
H o us ton . 

PAO This is Apollo Control Houston at 27 hours 

8 minutes ground elapsed time. During this quiet period in the 
Mission Control Center we are replaying the launch television 
on one of the large screens. This was the team of flight 
controllers that was on station during launch, and quite frankly 
very few had the opportunity to follow the sequence during the — 
visually during the actual launch. We presently show Apollo 16 
at an altitude of 109 85 4 nautical miles at a velocity of 4850 
feet per second. 

SC Ho us t on, 16. 

CAPCOM Go ahead, Charlie. 

SC Okay, (garble) back up again. Do you want 

to talk to us about this SPS burn rules? Stand by 
one, Ken (garble) 

SC Okay, Tony, can we go ahead? 

CAPCOM Okay, this isn't the burn rules, this is a 

discussion of procedures for midcourse 2 only. And a change 
could be noted in your cue card — SPS cue card — on the G&C check- 
list G5-2, but you might want to hear the whole thing before 
you write it down. Okay, at burn minus 6 minutes, the line that 
reads SPS helium valves 2 to AUTO should be changed to SPS he- 
lium valve 2 to MANUAL for 10 seconds. And after 10 seconds 
SPS helium valves 2 to AUTO, and then let it remain in AUTO for 
the burn. And we have a couple of notes to that. First — 

SC Now you're talking about going to ON when 

you say MANUAL, and you don't want us to stay there 10 seconds 
if it exceeds 200 do you? 

CAPCOM That's right. If it exceeds 210 we want 

you to turn them OFF. And we'll do the burn with them OFF . . . b e caus e 
if it went to AUTO during the burn we would go right back into the 
p r ob lem . 

SC Okay. 

CAPCOM Okay, and that was one of the notes and you 

just anticipated it there. The other note is you may, if we've 
diagnosed the transducer problem correctly, you'll probably get 



APOLLO 16 MISSION COMMENTARY k ! \1 111 GET 26:43 CST 2:37 MC-97/2 

CAPCOM an SPS pressure light. That will go on at 

2 01 p o unds . 

END OF TAPE 



APOLLO 16 MISSION COMMENTARY kjYlJll CST 3:26 GET 2 7 : 32 98/1 



SC 

CAPCOM 
the time of the 
15 po unds h Igh . 

S C 

CAP COM 

S C 

wrong with that 
CAP COM 



Okay . 
Righ t 
burn that 



now they are anticipating that by 
transducer will be biased about 



1 s 



Okay, that's the oxidizer side? 
That's affirmative. 

Okay. What is - what do you think 
transducer? 

Right now the note is that the comparison 
chamber, which should be at about atmospheric pressure, has 
leaked. And the leak is just making up for the normal absorption 
of helium, so the gauge is reading about constant. Eventually 
that comparison chamber will leak down to zero and then you 
will comparing, instead of comparing at 14.7 you will be 
comparing to zero and it will read 15 pounds high. 

We are reading about 11 pounds high now. 
Okay, our gauge has been constant since 



lift 



do\^n 



CAPCOM 
S C 
off. 
CAPCOM 
the line 



pressure down 



an d 
th e 



Right. We can read the pressure clear on 
in the fuel side the tank pressure and the 
line are tracking right along and they 
should be in the oxidizer side, but on the oxidizer side the 
tank's staying constant and the one down the line is dropping 
down as it should. So either the one in the tank is just 
locked up or the leak out of the comparison chamber is just 
making up the difference. 

PAO Apollo Control Houston at 27 hours 34 

minutes Apollo 16 now 111 051 nautical miles away from the 
Earth. Velocity now reads 4806 feet per second. 
CAPCOM Charlie, Houston. 

SC Go ahead. 

CAPCOM Just so there is no misunderstanding here 

like to verify this procedure. We are going to manual 
10 seconds at 6 minutes before the burn and then nominally 
we'll go back to auto even if you get a caution. The only 
point where we'd go to off would be if it went above 210. 

SC Okay, copy. At 6 minutes helium valves 

go to manual for 10 seconds, then to auto. If pressure goes 
greater than 210, then go to off. If we get a caution light 
but less than 210, we still stay in auto. 
CAPCOM That's right. 

PAO Apollo Control Houston at 27 hours 37 min- 

utes into the mission. That was CAPCOM Tony England up dating 
the crew of Apollo 16. The procedure is for the midcourse 

correction number 2 burn, which is MCC2 was scheduled for 

30 hours 39 minutes ground elapsed time and that would be a 
12,6 foot per second burn with the duration of 2 seconds using 



I' d 

for 



APOLLO 16 MISSION COMMENTARY hlllj'12 GST 3:26 GET 2 7:32 9 8/2 



PAO the service propulsion system engine. We 

are 27 hours 38 minutes ground elapsed time. Apollo 16 now 
111 2 45 nautical miles away from the Earth. Velocity con- 
tinuing to decrease and now reading 4799 feet per second. 

SC Do your guys feel like that your trans- 
ducers are good What I mean to say is, do you feel like your 

telemetry is good on the SPS tank pressure. 

CAPCOM Stand by 1, Charlie. 



END OF TAPE 



AIOLLO 16 MISSION COMMENTARY klUjll CST 15:35 GET 27:41 MC-99/1 



CAPCOM Charlie, Houston. 

SC Go ahead. 

CAPCOM Okay, the telemetry here, the telemetry 

is good and we can read from the transducer that your read- 
ing your oxidizer tank pressure, we can also read from the 
inlet pressure transducer, which you can't read on board. 
The inlet pressure transducer indicates that nominal decay 
and pressure due to helium absorption by the oxidizer. And 
this looks just like all the other flights. The other one, 
is the one that you are reading, and it looks like it's locked 
up. The reason for the procedure that we've sent up is to 
mske sure that we know the pressure in the lines before this 
burn, which will give us a baseline to plan the management 
during the LOI. 

SC Well, okay. That's what happened (garble) 

talking in here about how we're going to monitor the LOI, 

CAPCOM Right, that's our concern too and what 

we're trying to do is get enough unknowns out of this mid- 
ccurse so that we can have a good handle on the LOI, 

PAO This is Apollo Control, Houston, at 28 

hours and 4 minutes, into the Mission. We presently show 
Apollo 16 at the distance of 112,448 nautical miles away 
from the Earth and now traveling at a speed of 4755 feet 
per second. We're standing by continuing to monitor any 
conversation which has been quite sparse through the past 
several hours of the flight, but we will continue to do that 
and this is Apollo Control, Houston. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k I \1 111 CST 16:00 GET 2 8:05 100/1 



SC Houston, Apollo 16. Over. 

CAPCOM Go ahead, John. 

SC Roger, the bias test is completed at the 

end of a minute 40 seconds. We got 102.0 on Delta-V counter. 
CAPCOM Okay 10 2,0. 

PAO This is Apollo control, Houston at 

28 hours 10 minutes. That was Apollo 16 Commander John Young 
reporting that the MS bias check was completed. We presently 
show Apollo 16 at 112 740 nautical miles away and now traveling 
at a speed of 4 744 feet per second. Thus far during this 
shift the white team of flight controllers it's been very 
straight forward by the books very little conversations be- 
tween mission control and the flight crew. We standing by 
and continuing to monitor at 28 hours 11 minutes this is 
Apollo control, Houston. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h/lljll GET 28:20 CST 16:15 MC-101/1 



CAPCOM Apollo 16, Houston. 

SC Go ahead. 

CAPCOM Okay, we've got a few more questions on that 

paint shredding. When you have a break, if you'll give us a 
call, we'll send them up to you. 

SC Okay, Tony, go ahead. 

CAPCOM Okay, last night during the TV show, 

the lighting wasn't ideal, maybe you have observed something 
that we couldn't see in the tapes here. Okay, that panel behind 
the docking target — was it completely covered with the shredded 
material? There's an access panel right in the middle of that -- 
of the over all panel there — and we're curious to know if it 
W£S just in the access panel, or the whole panel. 

SC Okay, Tony, it was on the w-h-o-l-e panel. 

CAPCOM Okay, how about any other panels around. It 

looked like on TV there might be some on that panel just to the 
right, and so, do you have any words on any other panels? 

SC Okay, it's on that whole section there, Tony. 

There's 2 triangular panels, one on each side of this rectangu- 
lar pattern which is right below the docking target. That whole 
section that is parallel of the plus X, below the docking target, 
t\.e 1 triangular panels and the rectangular pattern all are shred- 
ded. 

CAPCOM Okay, we copy that. 

SC (garble) 
CAPCOM Say again? 

CAPCOM Was there any gold mylar k ap t on visible on 

the panel behind the docking target? 

SC Negative. It's apparently just a black sur- 

face now, most of the white looking paint, or whatever it is, 
is all -- most all gone now, there's just a -- well, I'd say 
maybe a 10% of the surface is now covered with this shredded 
w^L ite stuff. 

CAPCOM (garble) to that question was there was some 

question whether the panel may not have come off entirely and 
underneath that is some of the mylar stuff. 

SC Well, thepanel is still on, in fact you 

can't see the mylar. Below it is a black surface. It looks 
much like the top of the ascent propellant tank. 

CAPCOM Okay, and I guess you mentioned last night 

there was some streaming of the paint as it was coming off. 
Was there a preferred direction -- or what was it? 

SC Yes, radially -- well, for awhile it was 

radial to the X axis. Almost right out over the ascent module 
at the Y axi s . 

CAPCOM Was it independent of your jet firings? 

SC When Ken fired the jets, it really blew it 

o J: f then. 



APOLLO 16 MISSION COMMENTARY h 111 111 GET 28:20 CST 16:15 MC-101/2 



CAPCOM In the same direction? 

SC No, it made it go the other way down cowards 

the leg of the LM. 

CAPCOM Okay, without the RCS band it was almost at 

right angles, to the panel, and othervjise, it was going down 
towards the legs. 

SC Yes, and it looks like -- like John said, 

right now, Tony, as we come around into the Sun, there's some 
particles coming out off now more towards quad 2, and it looks li 
it's on the under side of this panel as we cannot see it, and, 
but it's between quad 2 and the ab s p r op e 1 len t module -- correc- 
tion the ab s p r op el lent tank. 

CAPCOM Okay, we're looking at the drawing here and 

see where you mean. 

S G Say again ? 

CAPCOM Roger, we copy that, Charlie. What we're 

searching for on this direction of flow is if you think there's 
anything in the area that might cause it to stream out like 
some a leaky tank or anything of that sort, or whether it's 

just seems to be almost random. 

SC I say again Tony, you cut out all after 

what we're searching for. 

CAPCOM Okay, what we're searching for here is just -- 

we don't think there is any leak over there, anything of that 
sort, but if there is a preferred direction of flow we're look- 
ing for indication of what it might be so we'll know where the 
flow is coming from, 

SC Tony, please you're for seme reason you 

weren't uplinking, and we've had all after what we're search- 
ing f or , 

CAPCOM Okay, stand by a second, Charlie, I'll be 

back with you in a minute. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY L,l\1112 GST 16:26 GET 2 8:31 102/1 



SC ... what their searching for. 

CAPCOM Okay, stand by a second, Charlie I'll be 

back with you in a minute. 

CAPCOM Okay, Charlie, Houston. How do you copy 

n ow ? 

SC We're five by. 

CAPCOM Okay, we were just searching around here 

a little bit for a possibility might be that we had a small 
leak in there or something that was causing the peeled paint 
to flow off in a particular direction. We were just wondering 
if you any indication that might be the case or whether it's 
just flying off at right angles. 

SC Well, when we first saw it that was our 

opinion also, but now that most of its gone - it's sorta just 
coming off in different directions, over. 

CAPCOM Okay, we copy that. 

SC And, Tony the stuff that - is really not 

white it's more of a gold looking color or sandy color now. 

CAPCOM Okay. Thats the shredded stuff your 

talking about? 

SC That affirmative. 

CAPCOM Alright, the thermal people aren't upset about 

this at all they don't think it will give us any constraint. 
Evidently that surface was only on there for the very high 
s un cas e . 

SC Okay. Well, the panel is intact under- 

neath that paint job whatever it was. The panel apparently 
is intact. 

CAPCOM Okay. Okay, Charlie I guess that's the 

whole set of questions there everybody is very happy with 
what we're hearing. 

SC Tony, the panel that shredded the ones 

that we were telling have some more pronounced wrinkle ridges 
in them than any of the other panels. 

CAPCOM Okay, we copy that, Charlie. We'll find 

out what that means. 

PAO This is Apollo control, Houston at 

28 hours 36 minutes ground elapse time. We presently show 
Apollo 16 at 113 903 nautical miles away from the earth and 
traveling at a speed of A 70 3 feet per second. The exchange 
that you heard between Charlie Duke the Lunar Module Pilot 
aboard Apollo 16 and cap com Tony England dealt, of course, 
with the paticles that were sited first yesterday evening. 
The Grumman thermal people who operated one of the staff 
support rooms, here have identified it as not being a problem, 
and here in mission control we're attempting to acquire more 
precise explanation for the behavior of these paint particles. 
We're at 28 hours 37 minutes ground elapse time and this is 
Apollo control, Houston. 
END OF TAPE 



APOLLO 16 MISSION COMMENTARY k I \1 j 12 GST 16:43 GET 2 8:4 8 MC-103/1 



PAO This is Apollo Control, Houston at 28 

hours 52 minutes ground elapsed time. Our displays presently 
show Apollo 16, at a distance of 114 , 5 9 7 nautical miles away 
from the Earth. Velocity now reads 4678 feet per second. 
We're at 28 hours 52 minutes and this is Apollo Control, 
Houston. 

PAO This is Apollo Control, Houston at 28 

hours 5 7 minutes ground elapsed time. Apollo 16 now 114,858 
nautical miles away from the Earth. And now traveling at a 
speed of 4669 feet per second. In the Mission Control Center 
we're in the process of a shift change over. This being the 
orange team of flight controllers replacing the white team 
of flight controllers and we're at 28 hours 58 minutes into 
the mission. This is Apollo Control, Houston. 

SC Houston, 16, do you read? 

CAPCOM Go ahead, 16. 

SC Okay, did you read, John, there? 

CAPCOM Negative. 

3C Okay we're exiting PTC and going to the 

far UV attitude. 

CAPCOM Roger. 

PAO This is Apollo Control, at 29 hours 14 

minutes. We've completed our shift hand over in Mission 
Control, flight director, Pete Frank, has been checking with 
his flight controllers, he'll being going around the room 
shortly and getting a status and briefing for the things 
that will be going on during this shift. We will have a 
change of shift press briefing that is scheduled to begin 
in about 10 to 15 minutes and will be in the news center 
briefing room. Participants in the briefing will be, flight 
director Gene Kranz, and flight surgeon Dr. Royce Hawkins. 
That again will be in about 10 to 15 minutes in the MSC news 
center briefing room. 

CAPCOM 16, we've got a state vector and a tar- 

get ]oad whenever you're ready to accept. 

SC You'vegotit. 

CAPCOM Roger, thank you. 

SC How longyoubeen down there? 

CAPCOM Oh, about 20 minutes. 

SC How's the weather down there today, Pete? 

CAPCOM Beautiful. A little warm. And Charlie, 

you're right over the Gulf of Mexico. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h ! \1 1 11 CST 17:16 GET 29:20 104/1 



S C 

Me xi CO . 
S C 

are s ti 11 there . 
CAP COM 
S C 

CAP COM 
S C 

CAP COM 
the Gulf of Mexico, 
SC 

That we could 
CAP COM 

S C 



Charlie, you're right over the Gulf of 
Looking out his window he said that you guys 
Ken. 



are still there 



Say again. 
Looks like you guys 
We ' re still h ere . 

What did you say about the Gulf, Pete? 
Yeah, you should be right directly over 



see 



Yeah, I was thinking the same thing, 
i t anyway . 

Apollo 16, you can have the computer. 
Thank you. Do you want us to go to 
Delta now or you guys want to hang on to our antennas? 
CAPCOM Rog, you can stay there. 

PAO This is Apollo Control. We are ready to 

s.f7itch now to the MSG News Center Briefing Room for our change 
of shift press briefing. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h/n/12 CST 17:47 GET 29:52 MC-105/1 



PAO This is Apollo Control, at 29 hours 52 

niinutes into the flight of Apollo 16. During our change of 
stiift press briefing, the crew aboard the spacecraft has been 
pleting preparations for their first midcourse correction on 
the translunar leg of this flight. That midcourse coming at 
the second opportunity, at a ground elapsed time of 30 hours 
39 minutes. And they have now completed aligning the guidance 
platform which is used as an attitude reference for the maneu- 
ver. The burn will be performed with the service propulsion 
system engine in the service module and will be 12.6 foot 
per second maneuver. Burning the engine for 2 seconds. We've 
accumulated about A minutes of taped conversation with the 

that back for you now and then stand by 



com- 



c rew 
live 



and we'll pi ay 



an d 



Houston, do you have the angles? 
Affirmative, we got. 
Torqued at 39 30. 

Roger, And 16 we've got the MCC 2 pad 
antenna angles fcr MCC 2 whenever you're 



S C 

CAPCOM 

SC 

CAP COM 
the high gain 
re ady . 

SC Okay, Houston, go ahead with your pad. 

CAPCOM Okay, MCC 2, SPS , G £<N 66 768 plus 124 

minus Oil 0 30 39 0001 NOUN 81 is plus 00089 minus 0001 1 
plus 00089 094 354 010 NOUN 44's are N/A Delta VT 00126 00 2 
00083. Sexton star forward 0 2564 30 3. ACCEPT of the pad is 
NA, set stars are Sirius and Rigel 2 19 166 313 ullage none, 
LM weight 36258. 

SC Okay, we copy, MCC 2 SPS slash G&N 66768 

plus 124 minus Oil 0 30 3900 01 plus 00089 minus 00011 
plus 00089 094 354 010 NA NA 00126 002 00083 plus 0564 
30 3 rest of the pad is NA. Sirius and Rigel 2 19 166 3 13 no 
ullage, LM weight 36258. 

That's affirmative, Charlie. You are ready 
an gles . 

Go ahead. 

Okay, PITCH minus 46, YAW plus 0. 
Okay, PITCH minus 46, Yaw plus 0. 
Ro ge r . 
Is that it? 
line heaters, 



tor 



C 



gaxn 



the 
off 



n ow 



CAPCOM 
the high 
S C 

CAP COM 

s c 

CAP COM 
S C 

hydrogen purge 
our hair e arly . 

CAPCOM 

S C 

or do you want 
CAPCOM 



Okay, Houston, we turned on 
maybe we can get this purge 



Roger, c opy . 

Houston, can we do this waste water dump 
us to wait closer in? 
Stand by one minute, John 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY Mlllll CST 17:52 GET 29:57 MC-106/1 



S C 

CAP COM 



Until we're closer in. 

Stand by one minute, John, we'll check 



i t 



CAP COM 
sexton star check 

SO 

sextant business, 
out the re I don ' t 



John , 
Ok ay . 



we'd prefer you wait till after the 



I'll tell you one thing about that 
Don, we got so many particles off the LM 
believe you could recognize the star pattern 
And the telescope hammer but they show up just perfect in the 
se xtan t . 

CAPCOM Roger. 

SC It sure makes you appreciate one of these 

non-drifting platforms, 

CAPCOM Rog. Ken, if your ready you can do that 

water dump any time you want. 

SC Oh, we'll go ahead and do that. Do you 

have any objections to our going ahead and going to the atti- 
tude ? 

SC You're really crowding the length of time 

it's going to take to dump the water up against the burn time. 

CAPCOM Yes, you can go ahead and attitude or do 

the water dump which ever you want. 

SC Okay, we'll go ahead and go to attitude 

and see what we have for time. We'll get the star check off 
in the first priorty. 

CAPCOM 

SC 

CAPCOM 
b a t te ry A 
SC 

CAPCOM 



Ro g e r . 

Pete, we go 
Ro ge r, 16 . 
after the burn. It's 
Ok ay . 

16, I've got some gyro drift updates and 



to stop charge and bat A now? 
And 16 you can delete charging 
charged sufficiently. 



for 



triple bias 
SC 

CAP COM 
and numbers, 
146 2 7730 7. 

S C 
77 307. 

CAPCOM 
bias, the address 

S C 

CAPCOM 
Al pha? 

SC 

CAPCOM 
P AO 



you. When you're ready to copy. 
Okay, go ahead. 

the gyro drift, I'll give you addresses 
77552, address 1461 77756, address 



Ok ay , 
address 1460 



Okay, that's 1460 77552, 1461 77756, 1462 

That's affirmative. And on the triple 
is 1456 76747, OMNI Alpha 60. 
Okay, 1456 76747. 

That's affirmative and did you copy OMNI 



Alpha. 



Bkay OMNI 
Roger. 

This is Apollo Control at 30 hours 11 
minutes. We are now about 28 minutes away from the scheduled 
ignition, for the midcourse correction. The first to be per- 
formed on this leg of the flight to the Moon. That maneuver 
again will be performed with the spacecraft service propullsion 



APOLLO 16 MISSION COMMENTARY CST 17:52 GET 29:57 MC-106/2 



P AO 

2 seconds duration, 
velocity change. 

CAPCOM 

CAPCOM 

END OF TAPE 



system engine. It will be a burn of about 
Providing about 12.6 feet per second in 

S t an d by one . 

Where 're your ACQ and narrow, Charlie? 



APOLLO 16- MISSION COMMENTARY 4/17/72 CST 18:08 GET 30: 13 107/1 



m 



an d 



SC 

the middle 
CAP COM 
SC 

the waste 
CAP COM 

SC 



It's right 



Okay, the star checks out good, 
and the waste water dump is insork. 

Say, again John, I didn't copy that. 
Star checks good, it's right in the middle 
water dump is in work. 
Ro g e r . 

Don, could you tell us if the 
number you gave us includes any kind of a bias to 
for the minute of EMS on time prior to ignition? 
CAPCOM Just a moment. 

SC ■ Yeah, I'm not asking for one, 

asking if that's in there. 

Okay, standby, we'll check it. 



Delta VC 
compens ate 

I'm j us t 



terminating the waste water 
Ro ge r . 



that into account. 

at 30 hours 29 
from the scheduled 
maneuver to be 



CAPCOM 
S C Ok ay , we are 
dump now . 

CAPCOM 

CAPCOM Ken, the pad does take 

SC Okay, thank you sir. 

PAO This is Apollo Control 

minutes. We are now about 10 minutes away 
ignition time for the midcourse correction 
performed with the spacecraft service propulsion system 
engine. A very short burn of about 2 seconds duration. 
This maneuver will change the point of closest approach to the 
moon from it's present value of about 117 nautical miles down 
from the desired altitude of 71 nautical miles at which point 
the lunar orbit insertion maneuver would be performed placing 
the spacecraft in the nominal 58 by 170 nautical mile orbit 
about the Moon. Again that maneuver now is scheduled to be 
performed 9 minutes 30 seconds from now. At the present time 
Apollo 16 is 118 926 nautical miles from Earth, traveling 
at a speed of 4528 feet per second. Flight Director Pete 
Frank has checked the status with all of his Flight Controllers 
and we appear to be in good shape for the maneuver. The 
crew has completed virtually all of the activities prior to 
the midcourse correction and everything looks good at this 
point . 

SC We pressurize the pressure 



in the SPS 



n ow , 



s ur e 
in 



CAPCOM 
S C 

of just 
auto . 

CAP COM 



Ro g e r . 

Okay, Houston, I'm looking 
about 210. We are going to leave 

Ro ge r . 



a t oxi di z e r 
the valves 



pres- 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hl\lll2 CST 18:29 GET 30:34 MC-108 



SC We're looking at oxidizer pressure, just 

about 210. We're going to leave the valves in auto. 
CAPCOM Roger. 

PAO This is Apollo Control. We are now about 

3 minutes away from the ignition of this midcourse correction 
Everything continues to look good. The spacecraft is in the 
proper attitude, the SPS tanks are pressurized. And we're 
now 2 minutes 35 seconds from ignition. Now 1 minute from 
ignition. Coming up on 10 seconds to ignition. And our 
guidance officer reports the burn is complete. It was sche- 
duled to be a 2 second burn with a change in velocity of 12.6 
fee t pe r s econd. 

S C 

big boot. 

CAPCOM 
PAO 

numbers on that burn 
officer — 

SC Houston, do you want 

you all see everything? 

CAPCOM Stand by one. 16 we'd like a burn report. 

SC Okay, Delta tlk was 0 burn time was on my 

watch .1. We got trim within an attitude of 094 352 008 plus 
.1 minus 0 plus .1 Delta VC minus 3.1. Fuel is reading 010 
and OX 010 no unbalance. 

CAPCOM Roger, copy. 

SC And on board our fuel — okay, Pete on boar 

the fuel--during the burn the fuel pressure dropped to 170 
and the oxidizer dropped to 200. 



Well the old burn complete, Houston. It's a 
Ro g e r . 

And we're still waiting for the preliminary 
Our first reports from the guidance 



a burn report or did 



8, 



long 
They 
what 



Understand 170 and 
Okay, Houston, our 



200 . 

LM CM Delta 



1 s 



to go ahead 
right ? 



and do the tunnel vent to, vent till 



your best guess 
started off at 



on 
9 ? 



CAP COM 
S C 

you want 
greate r 2.7, 
CAPCOM 
S C 

this baby will 
CAP COM 

are s ay ing an 
SC 

it looks like 
CAP COM 
wrist watch to get 
S C 

ven t hole is. 

CAPCOM Rog. 

PAO This is Apollo Control at 3 hours--at 

30 hours 52 minutes. It'll probably be on the order of 2 to 
2 and 1/2 hours from now before the flight dynamics officer has 
Sufficient tracking data to confirm that the midcourse cor- 
rection had the desired effect. That being to lower the 



Af f i rmi t i ve . 

Hous t on , what ' s 

get to 27 if it 

Stand by one, I'll get 
hour and 50 minutes. 

That's about what we -- 
to me . 

Rog. Understand. John, 
that n umb er ? 
Rog. Just remember how 



h ov; 

you a n umb e r . 
that's ab ou t 
you using Charlies 
small that tunnel 



APOLLO 16 MISSION COMMENTARY h / 17 Jll CST 18:29 GET 30:34 MC-108/2 



PAG point of closest approach to the Moon 

from the value that we had prior to the maneuver of 117 nautical 
miles down to the desired altitude of 71 and also to place the 
spacecraft arrival time at the desired flight plan time. The 
preliminary numbers however did appear to be normal and we'll 
be confirming that with tracking data. At the present time the 
crew is beginning preparations for entering the lunar module. 
This is for the second time and at present they are venting 
the tunnel, the docking tunnel between the LM and the command 
module. So that they have a differential pressure of about 
2.7 pounds per square inch, between the tunnel and the command 
module. The command modules' cabin pressure is somewhere around 
5 to 5 and 1/2 pounds per square inch. This venting is being 
done to remove as much of the atmosphere from the LM as possible 
within a reasonable amount of time. The first time that we 
went into the lunar module last night the atmosphere in the 
co;iimand module still contains a small percentage of nitrogen 
of course at launch we're launching 60% oxygen, 40% nitrogen, 
and this is gradually replaced with pure oxygen in the command 
module. By going into the lunar module, earlier than normal, 
the amount of nitrogen that's allowed into the lunar module 
is greater than normal and therefore in order to have the 
oxygen content in the LM as close to pure oxygen as possible 
we are venting the lunar module down, the cabin will then 
be pumped up again prior to ingress, with pure oxygen and 
using this procedure we remove as much of the nitrogen as 
possible from the lunar module cabin. The estimate on this 
venting procedure is that it would require about an hour and 
a half. And we don't expect this to have any effect on the 
flight plan schedule for the crews' entering the lunar module. 
This should occur as it is planned in the flight plan. At 
the present time Apollo 16 is 120000 nautical miles from Earth 
and the spacecraft velocity is down now to 4486 feet per 
s e con d . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k ! \1 j 11 CST 18:49 GET 30:54 109/1 

CAPCOM 16, would you verify H2 tanks 1 and 2, 

heaters off and H2 tank 3 fan auto? 

SC Oh, oh, we got the tanks 1 and 2 heaters 

in auto and fan 3 in auto, will turn H2 heaters 1 and 2 off. 

CAPCOM Ah, Roger, thank you. 

END OF TAPE 



AFOLLO 16 MISSION COMMENTARY h I ±1 1 11 CST 19:09 GET 31:14 110/1 



PAO This is Apollo control at 31 hours 

34 minutes. Things have settled down in to a rather quiet 
routine here in mission control and we presume aboard the 
Sftacecraft. At this time the Apollo 16 crew should be 
eating what would be lunch for them, following that they will 
begin preparation for the transfer to the lunar module the 
second of this flight, of course the first coming last night 
unscheduled entry. And during this scheduled entry this 
evening Duke and Young will be powering up the communications 
ar.d instrumentation systems aboard the lunar module. We'll 
check out the communications circuits with them and also give 
the control center here a chance to look at all of the major 
systems on the lunar module once the instrumentation to all 
oi' these systems is powered up. Normally, during the trans- 
lunar leg of the flight the only instrumentation, the only 
re;adings that we have on the LM is the amount of power that 
i £1 transfered from the command module to the lunar module, 
and during this entry into the LM Duke and Young will be 
powering up the bulk of the instrumentation that will allow 
ue; to look at all critical systems. They will also be trans- 
fering most of the items from the command module that they 
will need for operations in the lunar module later in the 
mission and stowing these in the LM. 

SC Okay, Houston. We're up the 2.1 on the 

LM CM Delta P gauge now. 

CAPCOM Roger, copy 2.1. And while I'm talking 

to you on this oxygen tank pressure gage it's starting to 
look like there is a bias in there of about 14.7 due to the 
fact that the reference chamber has apparently leaked its 
or.e atmosphere reference. Now your down to probably a vacuum. 
Ar.d that coupled with a 5 psi meter bias should give you a 
total bias of about 20 psi on oxygen tank pressure. But the 
gcige seems to be working okay except for that bias so we're 
going to continue to follow it so we can give you a better 
number prior to LCI. 

SC Thank you, Pete. 

CAPCOM Roger. 

SC Houston, 16. Over. 

CAPCOM Go ahead. 

SC Okay, Pete, I just took my window shade 

out of my rendezvous window and looking out at quad 1 of old 
Oi^ion. The thermal shield that sits directly Inboard of the 
quad thats facing the plus Z direction it's a little piece 
atout 3 feet long by about a foot wide. It's beginning to peel 
also, n ow . 0 ve r . 

CAPCOM It's doing the same thing as the panel 

wt! looked at last night. 

SC That's affirm, except for - it's not 

nearly as bad it's Just primarily on the inboard side, but 



APOLLO 16 MISSION COMMENTARY 1^/11/12 CS T 19:09 GET 31:14 110/2 



SC it is beginning to get the shredded wheat 

appearance like the other one. Over. 
CAPCOM Roger, unde rs tan d- 

SC Pete, on the outboard side right out near 

the quad or right above the quad on that same panel it seems 
to rae it's beginning - it looks like it starts out with a 
very fine shaggy grass type stuff and it's slowly peels up 
into the shredded wheat type. Over. 

CAPCOM Roger, understand. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k I \1 J 11 GET 31:44 CS T 19:39 MC-111/1 



CAPCOM 16, Houston, when you get a minute, we've 

get an addition to the flight plan at 32 48. 

SC Roger, go ahead with your 32 48 addition. 

CAPCOM Okay, we want to add a note to read the LM 

CM Delta P. And we want to get that prior to that CM LM pres- 
st.re equalization decal. 

SC Okie dokie. 

CAPCOM And Ken, we've made an ink correction on 

the back of that AOS LOS sun wheel aid there. And when you 
get around to digging that out, I can give it to you, or I 
can pick it up later. 

SC Ken's busy right now, say again, over, 

CAPCOM Okay, on the back of the sun wheel -- the 

AOS LOS sun wheel, we've entered an ink note to account for the 
fc.ct that we change REFSMMAT in the middle of his work there. 
We made an error on it, we've got to change the note now and 
sometime when he's got that wheel out, 1 can read him up the 
c o r re c ti on . 

S C Okay . 

PAO This is Apollo Control at 32 hours 5 minutes 

A few minutes ago Charlie Duke reported additional paint appar- 
ently peeling from another of the aluminum skins on the Lunar 
Module, and from Duke's description this appeared to be one of 
the surfaces in the area of quad 1 on the Lunar Module. This 
would be a quad adjacent to the commander's station in the crew 
compartment. And Duke said that there were about 3 square feet 
of surface area involved. He described the appearance of the 
surface about as the other surface which had also peeled. Rang- 
ing from what he said was a kind of a sprouting grass appear- 
ar.ce to shredded wheat. Now at the present time, the crew is 
awaiting the pressure differential between the docking tunnel 
and the Command Module, to reach 2.7 lbs. per sq. inch. At 
the last report from John Young the difference in pressure as 
the tunnel is vented, had reached 2.1 lbs. per sq. inch. The 
cirew is scheduled to begin entering the Lunar Module to power 
up the communication system and turn on the instrumentation 
so that we can get a complete look at most of the major systems 
on the Lunar Module, here on the ground through telemetry. And 
flight plan calls for them to enter the Lunar Module at about 
33 hours 5 minutes, or a little less than one hour from now. 
At the present time Apollo 16 is 123 126 nautical miles from 
Earth, and traveling at a speed of 4382 feet per second. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY GST 20:09 GET 32:14 MC-112/1 



PAD This is Apollo Control, at 32 hours 26 

minutes. Here in the control center the lunar module con- 
trol officer has replayed the tape of Charlie Duke's description 
of the additional surface of the LM that appeared to be peeling. 
Where the paint was peeling, simili.ar to the v;ay panels below the 
docking target were reported peeling yesterday. From Dukes 
description we were not able to pin point the precise panels 
involved although it is obviously very close to the area, that 
was reported peeling previously. And appeared much the same 
from Dukes description, the paint which is painted on the very 
thin aluminum skin in this area of the LM to provide a small 
margin of additional thermal protection in worse case con- 
ditions where the lunar module is exposed to greater sun 
angles than we will be seeing on this mission. The paint on 
those surfaces is as Duke described them giving the appearance 
of sprouting grass and then peeling back even further and 
giving the appearance of shreaded wheat. Duke said that the 
area involved is about 1 feet by — 1 foot by 3 feet. And 
was in the area of Quad 1, which is one of the reaction con- 
trol systems thrusters Quads located adjacent to the commander's 
station in the lunar module ascent stage. General Jim McDivitt, 
who is in the control center at the present time advised Pete Frank, 
that the studies that Grumman has done, the manufacturer of the 
lunar module, show that even if all of the surfaces on the 
LM which are painted in this manner were to lose their paint 
that the effect would be minimal and would cause no concern 
as far the temperatures of the lunar module are concerned. 
We expect that we will get further information at the time the crew 
enters the lunar module and also we will be looking at all of 
the pertinent systems, all of the critical systems aboard the 
lunar module and are getting a comparative set of numbers to 
go with those that we saw last night. And all of the engineers 
here in the control center and the back rooms, the staff sup- 
port rooms, and in building 45 at the Manned Spacecraft Center 

at this data very closely and comparing it with 
that we got when the LM was powered up last 



will be looking 
the Information 
night. 

SC 

at t i t ude . 

CAP COM 

S C 

vent right n ow . 
CAP COM 

S C 

CAP COM 
SC 

CAP COM 

S C 



Okay, Houston, we're maneuvering to the 



Ro ge r . 

Ok ay , Ho us ton , 



Ro g e r , copy, 2 
LM, CM Delta P. 
Roger, LM, CM Delta P, 
LM, CM, Delta P. 
Ok ay , we copy . 
( garb le ) 



we got 2.7 on the tunnel 



7-- 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY L, I \1 j 11 GST 20:37 GET 32 : 42 11 3/1 



S C 

the correct 0 2 and 
CAPCOM 

S C 

5 17? 

CAPCOM 
SC 

CAPCOM 
SC 

CAP COM 
SC 

CAP COM 
CAPCOM 
ycu have a reading, 



Okay, Houston, we're going to come on with 
power up the cabin. 
Ro ge r , 

How does that look Houston, is that about 



We ' re 
Ok ay . 
John , 
Okay , 



showing about 5 5 John, 



n ow . 



that should take less than 10 minutes 



they say that's good enough 
direct 02 is going closed. 
Ri gh ty . 

Okay and the LM/CM Delta P is 3.3. 
Roger, stand by a minute. 

16, we want to continue LM venting until 
Delta P reading of 3.4 on the meter and 



SC 


Okay , we copy . 


We ' 1 1 


go to 3.4. 


S C 


Okay , w e ' re in 


LM vent 




CAP COM 


Ro ge r . 






SC 


Ok ay , Hous t on , 


it's an 


hones t 3.4. 


CAPCOM 


Roger, copy. 






SC 


We' re clear to 


p ro ceed 


, over. 


CAPCOM 


Ro g e r , Ken. 






S C 


Ok ey , Dokey . 






PAO 


This is Apollo 


Co nt rol 


at 32 hours 



minutes. The LM cabin has now been vented down to the desired 
pressure level and the crew will shortly begin re p re s s uri z in g 
cabin to about 5 to 5 and a half pounds per square inch. 



the 



Following that they will be preparing to enter the lunar 
module. I expect that will require about 5 to 10 minutes. 
The flight plan calls for them to be in the LM by about 
33 hours and 5 minutes or about 7 or 8 minutes from now. They 
will have to remove the tunnel hatch, the probe and drogue 
assembly, and then crawl through the tunnel into the lunar 
module. Following that they have about 30 minutes or so of 
housekeeping activities aboard the LM and then they will 
activate the communications system and run a series of commun- 
ications checks with Mission Control. Our LM systems engineer 
has just reported that they are beginning the activities to- 
ward rep ressuri zing the lunar module. During this entry into 
the LM they will also be powering up the data systems that will 
allow us to get a good look at all of the major systems on the 
lunar module through the telemetry and we'll have teams of 
engineers here in Mission Control and in the engineering 
support rooms in Building 45 here at Manned Spacecraft Center 
looking at this data very closely and comparing it with the 
similar measurements that we got yesterday from the crew that 
made their unscheduledj previously unscheduled entry into the 
LM. At the present time Apollo 16 is 125 324 nautical miles 
from Earth and we are continuing to watch the spacecraft velocity 
drop off. It is down to 4310 feet per second. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY klYljll CST 20:53 GET 32:58 114/1 



SC Okay, Houston, we're about ready to re- 

move the hatch. 

CAPCOM Roger. 

PAO That was Charlie Duke reporting that the 

crew was about ready to remove the hatch allowing them to 
get into the LM tunnel remove the probe and drogue assembly 
which will clear the tunnel and allow them to enter the 
1 unar module . 

SC Houston, Charlie's floating on over to 

the lunar module now to check out old Orion. 





CAPCOM 




Ok 




P AO 




Th 


Duke 


as he p 


ut it, " 


f 1 


Th at 


report 


came at 


33 


Y o un 


g will b 


e f o 1 1 ow 


in 




S C 




Ex 




CAPCOM 




Mi 




PAO 




Th 


the 


first b 1 


t s of da 


ta 


Duke 


begin p 


ar t i ally 


P 


dy n ami cs off 


i ce r j us 


t 


c ours e cor re 


c ti on p e 


rf 


craft appears to be 


on 



3 3.5. 

is Apollo control. We're awaiting 
com the lunar module as Young and 
ering the vehicle up. The flight 
reported that as a result of the mi d- 
irmed at 30 hours 39 minutes the space- 
the desired trajectory and will be 
approaching the moon at an altitude of about 71 nautical 
miles at its closest point prior to the lunar orbit insertion 
maneuver. This is the preplanned value. We also have an 
update on the predicted impact point for the Saturn third 
stage the S-IVB. The new coordinates that we now have for 
that impact point are 1 degree 50 minutes north and 23 degrees 
18 minutes west. This is slightly closer to the planned 
target point of 30 degrees west and the coordinates we got 
last night as I recall those had us about 22 1/2 west we're 
now showing about 23 degrees 18 minutes west so moving a 
little bit more westerly as we continue to get additional 
tracking on the S-IVB. And the expected impact time is 
75 hours 7 minutes 3 seconds ground elapsed time. 
SC Houston, Casper. 

CAPCOM Go ahead, Casper. 

SC Rogj Don. Did you guys get the total 

in de X? 

CAPCOM We've got it, Ken. 

SC Okay. And, Don, I'm holding off on the 

oxygen heaters I'm keeping them all three in AUTO until we 
get the surge and repress tanks built back up. If that's 
okay, if you would like for me to turn them off I can recon- 
figure now, otherwise I would like you to help me remember 
not to leave them on. 

CAPCOM Roger, we concur. Ken. We'll remind you. 

SC Ok ay , th ank y o u . 

END OF TAPE 



AP3LL0 16 MISSION COMMENTARY k ! \1 i 11 GET 33:24 CST 21:19 MC-115/1 
SC Okay, thank you. 

END OF TAPE 



APOLLO 16 MISSION COMMENTARY M 11 / 12 CS T 21:41 GET 33:46 MC-116 



PAO This is Apollo Control, at 33 hours 47 

minutes. We've heard nothing from John Young and Charlie 
Duke, since Young reported about 30 minutes ago that they 
were entering the lunar module Orion. The crew is scheduled 
to be stowing items that they've carried over from the command 
module and then we'll begin powering up to lunar module, ac- 
cording to check list that they will be carrying on with them. 
And shortly after they begin the partial power up, we should 
see a telemetry data of most of the critical systems aboard 
the lunar module. 

Hey, Don, can I talk to you about the 

docking latch? 

CAPCOM Roger. 

SC You'll send or do you want me to wait a 

min ute . 

CAPCOM No, go ahead. 

Okay, you remember when we toldyou at the 
time that we docked we had a number 10, that didn't look like 
it had stroked quite the same as the others, but the lock was 
over the rail. You weren't on board at the time, I tried, we 
were talking to Gordon, but that's one of the things we re- 
ported and the plate (garble) over the bungee fairing is 
cocked slightly, and now that we've got everything cleaned out 
of the tunnel 1 can look in here it's real obvious that the 
bungee isn't firing completely. It's down, the top of the 
bungee is recessed about a half of an inch down, it looks like 
it just half triggered and as a matter of fact I'm looking at 
the latch and by golly I can see between the latch and the 
total ring, so it didn't even pull down against that. And I 
really obviously don't have any concern for it, except I've 
never seen one look just like this and I was going to go ahead 
and recock it, and fire it again and see how that worked with 
a manual trigger, but I got to thinking maybe that's — maybe it 
best to let you folks think about it. The main thing I want 
to do is make sure it's not a problem in unlatching it when 
the t i me c ome s . 

CAPCOM Roger, stand by. 

CAPCOM Casper we got all the data we need and 

we're going to take a look at it. We do not want you to re - 
cock and fire the thing manually and we will get back to you 
late r . 

CASPER Okay. 

CASPER And, Houston, Casper turned over the power 

supply to Orion at 3358. 

CAPCOM Roger, Casper. 

FAO With Ken Mattinglys' report that he turned 

over power to the LM, which came at 33 hours 58 minutes, we 
would expect shortly to begin seeing telemtry data from the 
lunar module. Also Mattingly commented on a problem that had 



APOLLO 16 MISSION COMMENTARY hjlljll CST 21:41 GET 33:46 MC-116/2 



PAD been reported previously and that is that 

one of the 12 docking latches, on the command module, apparently 
has not latched firmly around the docking ring of the lunar 
module, as would normally be expected. This doesn't constitute 
any concern, 3 of these 12 docking latches are adequate to assure 
a hard dock, and only 1 of the 12 is not latched down firmly. 
The belief at the present time is that it's probably just hung 
up if the thing were fired again that it would engage fully. 
And it doesn't appear that any thing further will be done with 
this particular latch. The expe ctat i s: r; Ls that when the 2 
vehicles are separated and then docked again that the latch will 
perform properly. And as we mentioned in any event only 3 of 
the 12 latches are required for a hard docking. Well we have 
now started getting LM data, so we will be taking a good look 
at all of the systems on the lunar module. 

CAPCOM (garble) alpha. 

ORION Man you're just super on the VHF Alpha, how 

me? — Man that's good stuff isn't? 
ORION Just beautiful. 

ORION Your just very (garble). 

ORION Okay. Go Go Go Go Go 

Hey Ken, B simplex. 

CASPER Orion, Casper, on BRAVO simplex. 

ORION Okay, I read you 5 by, Casper, how me? 

CASPER Loud and clear. 

ORION You're super 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY I \1 j 11 CST 21:55 GET 34 : 00 11 7/1 



CASPER Orion, Casper having BRAVO and SIMPLEX. 

ORION Okay, I'm reading you 5 by. Casper how me? 

CASPER Loud and clear, 

ORION You're super. 

ORION Houston, how do you read Orion? Over. 

CAP COM You're loud and clear Orion. 

ORION Okay, we're coming on down voice back up 
and we're on a hot mike and you're loud and clear to us, over. 

CAP COM Roger. 

ORION How does the low bit rate look to you 

Pete ? 

CAPCOM Looks good, Orion. 

ORION Okay, I'm going up bit rate to the high. 
Okay, how do you read me now, Pete? 

CAPCOM Loud and clear. 

ORION Okay, you're 5 by also, got high bit rate. 

CAPCOM Looks good, John. 

ORION Okay, we're going to biomed right. How do 
you read me now Pete? 

CAPCOM Loud and clear. 

ORION Okav. We're do^, 



to 


s t 


ep 


5 


te 


S 0 


me 


mo 


t 


wan 


t 


t o 



CAPCOM Negative. We dc 

more . 

ORION You do not. Ro g . We got into low bit 

rate. Okay, the book says perform voice and low bit rate 
with us then. How do you read? 





CAPCOM 


Loud and clear. 




ORION 


( garble d) 




ORION 


Houston, how do you read with the function 


an d 


voice, ove r . 






CAPCOM 


You're loud and clear. 




ORION 


Okay, you're 5 by and low bit rate, how 


does 


it look? 






CAP COM 


Low bit rate looks good. 




ORION 


Okay, we're going into high bit rate. And 


w e ' 1 


1 do the same 


thing with you - voice check and high bit 


rate 


check. 




ORION 


Houston, how do you read? Then over. 




CAPCOM 


Loud and clear. 




ORION 


Hey, give me a short count please, Pete. 




CAP COM 


5 4 3 2 1. 




ORION 


Ro g . You're very good. Okay we're going 


to - 


bit rate is 


going low and we're going S-band range to 


rang 


ing. 




CAPCOM 


Roger. 




ORION 


How do you read now? Over. 




CAPCOM 


Loud and clear. 



APOLLO 16 MISSION COMMENTARY Mlllll CST 21:53 GET 34:00 117/2 



ORION 

CAP COM 

CAP COM 

ORION 
at 37 volts and 

CAP COM 

ORION 
6 0 3 0, over . 



Okay, hov; does the 
3 t an db j . 

Ranging looks good 
Oka>, Houston, our 
our sequence camera at 
Ro ge r ^ copy . 
An d Jo Kn ' s OPS was 



ranging check going? 
Orion . 

EV Bats are both GO 
wo rk . 

5800 and mine was 



END OF TAPE 



Ai'OLl.O 16 MISSION COMMENTARY k 111 j 11 CST 22:01 GET 34:06 118/1 



ORI ON 
b 0 0 0, over. 
CAP COM 
ORION 
is j us t super 



And John's OPS was 5S 0 00 and ralne was 



Ro ge r . 

Okay, as far as we're 
and we're ready to go on to 



concerned, the com 
phase 120 and de- 



i f V o u 



ac ti va te it, 

CAP COM 
S C 

OR LON 
!■ AO 

center report that 
telemetry data tha 



t n at . 

can d e a c 1 1 V ; 



t e 



g uy s are. 
Stand by one on 
Okay, Orion y o ;i 
Okay, de a c ti V a 1 1 n g , 
All 11 controllers here in the 
all of the LM systems look good 
t we're receiving. Apollo 16 at 



control 
based on the 
this time 

is 12 8 138 nautical miles from earth trat'eling at a speed 
of 4 221 feet per second. And Charlie Duke reported that he 
Young are now ready to begin deactivating the lunar module 
in preparation for going back into the command rn.odule and 
hate h . 

Okay, Houston, Casper lias LM power back 



an 



closing up the 

CASPER 
at 3 4:19. 

CAP COM 

CASPER 

CASPER 
doing with 52 
Jup i t e r . 

CAP COM 

CASP ER 

CAP COM 

P AO 

utes. John Young 
the lunar module, 
the close out and 
25 or 30 minutes, 
partially powered 



Roger, 34:19. 
Affirm. 

Hey, Don, if anyone 
I just wanted to use auto 



wonders what I'm 
optics to point at 



Roge r. 

I'm not going to take any marks. 
Roger, understand. 

This is Apollo control at 34 hours 35 min- 
an d Charlie Duke are apparently still in 
Orion. They are not scheduled to complete 
return to the command module for another 

During the time that they had the LM 
up and we had telemetry data, all of the 



systems onboard looked normal, everything looked very good 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k j 11 1 11 GET 34:36 CST 22:31 MC-119/1 



CAPCOM Casper, we've got the LOI minus 5 flyby pad 

whenever you're ready to copy. 

CASPER Standby one, 

CAPCOM Roger. 

ORION We got Casper's keeper over in the Lunar 

Module taking a peek and we'll be closing it out and get it in 
a minute . 

CAPCOM Roger, understand. 

ORION I think you really get to be a real believer 

in the heating c.u i'city cf the Sun. Ir.i the Lunar Module here 
the commander's window is in direct sunlight and it's almost 
too hot to touch it. My window is in the shade and it's got — 
it's frosted over. 

CAPCOM Roger. 

ORION Okay, we're going to close her out, Pete. 

CAPCOM Okay, John. 

PAO That was Charlie Buke reporting. He and 

John Young are going to close off the Lunar Module now, and 
get back into the Command Module. Duke also gave one observa- 
tion of the affects of the Sun on heating the vehicle. He 
reported that the commander's window which was in direct sun- 
light was almost too hot to touch, and the Lunar Module pilot's 
window on the other side of the vehicle was frosted over. That 
window, of course, not in the sunlight. And at this time Apollo 
16 is 129 776 nautical miles from Earth. The speed down now 
to 4170 feet per second. 

CASPER Houston, the hatch is closed, the drogue is 

installed, the probes is installed, the hatch is installed on 
our side, the LM tunnel vent valve is in LM C and Delta P, 
the tunnel lights are off, is it okay if we go to PTC instead 
of PDC now, or do y ' all want to wait until 34? 

CAPCOM Standby one. 

CAPCOM 16, you can go ahead and do the PDC. 

SC Okay. 

PAO That was John Young reporting the probe and 

drogue assembly reinstalled in the LM tunnel, the hatch back 
in place, and a bit of what sounded like blue grass banjo music 
drifting in from the background. Apparently the music being 
played on the crew's onboard tape recorder. That report that 
Young and Duke had completed the activities aboard the Lunar 
Module and we're back in the Command Module with everything in 
the LM buttoned up. It came at about 35 hours 5 minutes. We 
got the report that 33 hours 14 minutes that Charlie Duke had 
entered the Lunar Module so they did the LOI fly-by pad. 

CAPCOM We probably configure changes for you. 

SC Okay. ifyoucanholupforasecond 

on that. 

CAPCOM Roger. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k I \1 J 12 CST 22:5 9 GET 35:04 120/1 



PAO The total time that Young and Duke were 

In the lunar module Orion, was about 1 hour 45 to 1 hour 50 
rainutes and we don't have the precise time on their reentry 
to the command module, but that v;ould be a fairly good esti- 
mate. . 

SC Houston 16, you can go ahead with the 

cryo tanks reconfiguration. 

CAP COM Okay, on the cryo tanks, we v/ant H2 tanks 

1 and 2 heaters auto, and tank 3 fan off. Oxygen tanks 1 and 

2 heaters off, tank 3 heater auto. 

SC Okay, Rog. Configuration H2 heaters 1 and 

2 auto, 02 heaters 1 and 2 off, 3 we're auto and that's as 
we had it. H2 tanks 1 and 2 off and 3 off. 

CAP COM Roger. 

SC Okay, Houston, you can go ahead with the 

MR 5 band. 

CAPCOM Okay, LOI minus 5, fly by. SPS G&N 66603 

plus 124 minus 012 06 9 2 8 262 7 plus 00398 minus 01189 plus 
0422 9 2 10 19 3 3 46 NA H sub P is plus 00204 04411 107 04365 sextant 
star, 14 1248 174, the next 3 lines are not applicable. 
Lattitude minus 2303 minus 16500 11009 3620 7 1422 342. Set 
stars Cerinus and Rigel 219 166 313, ullage none other number 
1 burn SPS dock. 2 pad based on PTC REFSMMAT 3 LM weight 
36 2 87. 

SC Rog. (garble) LOI minus 5 flyby. SPS/G&N 

66603 plus 124 minus 012 069 2 8 262 7 plus 00398. I missed 
Delta ZY, Delta ZC is 04229 2 10 193 346 HA is NA is plus 00204 
44 11 107 04 36 5 14 12 48 174 NA lattitude minus 2 303 minus 16500 
1 1009 3620 7 1422 342. Carious and Rigel 2 19 166 3 13 , ullage 
none, noi.es are 1 burn SPS dock PTC REFSMMAT LM weight 36 287 
which is 30 pounds heavier than we had this morning. 

CAPCOM Roger, we'll take a look at that and the 

Delta VY is minus Oil 



END OF TAPE 



APOLLO 16 MISSION 



COMMENTARY 4- 



-72 GET 35:13 CST 23:08 MC-121/1 



SC 67, which is 30 pounds heavier than we 
had this morning. 

CAPCOM Roger, we'll take a look at that and the 
Delta VY is minus 01189. 

SC Minus, Roger minus 01189. 

CAPCOM That's affirm. 

Go. 

SC Is that because we took the film over there? 

CAPCOM Say again Charlie. 

SC I said we took al± that film over there, 

maybe that's the 30 pounds. 

CAPCOM That's affirm, that's where it came from. And 

16, we still have this note to go on the Sun wheel. 

SC Standby. 

CAPCOM I need Charlie, 16. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hjl^ill CST 23:37 GET 35:42 MC-122/] 



CAP COM 
into PTC. 
S C 

CAP COM 
any antennas . 
S C 

CAPCOM 
PAO 

flight of Apollo 16. 
thermal control mode 
per hour. The crew 
that they have a s ch 
the present time is 
from Earth. And t ra 



16. 



your rates Is ok anytime you want to go 



Okay . Thank you. 

16, OMNI Bravo load and we'll take care of 

OMNI BRAVO, Houston. 
Roger. Thank you. 

This is Apollo Control 36 hours now into 
And spacecraft is now in it's passive 
Rotating at the rate of 3 revolutions 
is scheduled to be eating dinner and following 
eduled 8 hour rest period. Apollo 16 at 
135,2 - - rather 132 595 nautical miles 
veling at a speed of 4084 feet per second. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4- -72 GET 36 :0 7 CSX 00:00 MC-123/1 

DEAD AIR 
END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4- 



-72 GET 36:29 CST 00:20 MC- 124/1 



PAO This is Apollo Control, 37 hours novJ into 

the flight of Apollo 16. Flight that li^is settled down into a 
steady, and at the moment a rather quiet routine. This is 
typically a quiet time of lunar missions with the crew using 
the time that they have available to review checklists and 
procedures that they'll be following during the very busy days 
ahead on the lunar surface and in orbit around the Moon. 
Also at the present time the crew is scheduled to be in the 
midst of a — an eat period, having diner prior to retiring 
for an 8 hour rest period. We've been watching all of the 
spacecraft systems here in Mission Control; everything looks 
good as it has during most of the flight and we show Apollo 16 
now 134,939 nautical miles from Earth, traveling at a speed of 
4,013 feet per second. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY, 4-18-72, CST 01:05, GET 37:11 125/1 



CAPCOM 16, Houston. 

SC Go ahead Pete. 

CAPCOM Okay, just a last few words here. We 

don't have anything for you except one note to Ken. Earlier 
you asked about whether or not the pad we read you contained 
the correct bias for the EMS, we told you it did and we've 
looked at it a little more now and actually it turns out 
it did not. The bias on that one was less than a foot per 
second, I guess. In the future we will include that bias 
in the pads . 

SC Okay, thank you now. 

CAPCOM Rog and we're in to copy anytime you 

can give us the onboard readouts and get into the flight 
p !L an at about 37. 

SC Roger. 

SO Okay, Houston, Bat Cis37, ROBatAis 

37, RO Bat B 37, RCSA is reading 87, RCSB - 92, RCSC - 93, 
RCSD - 96. Is that what you wanted, the quantity of the 

r:s? 

CAPCOM That's affirm. 

CAPCOM And we copied 37, 37, 37 , 87, 92 , 9 3, 

an d 9 6. 

SC That's correct and the main Bus A is 

reading 29 plus volts. 

CAPCOM Ken, for your information, the PTC looks 

beautiful, in fact it was so good it took some of us quite 
a while to realize you were in a PTC. 

SC Jim, my attitude hold looks a lot like 

that too. 

CAPCOM Rog. 

SC It's all in the technique, for the way 

you hit precede. 

CAPCOM Roger, honest. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4-18-72 CST 1:23 GET 37:29 MC-126 



Houston, let me read you this cryo tank 
configuration, and you tell lue if that's what you want tor 
the sleep pe riod . 

CAP COM Okay. Play ic 16, w e ' re - - 

SC (Garble.) 

CAFCOM Go ahead, 16, we're ready to copy the 

cryoconfiguration. 

Okay. H2 heaters are - 1 and 2 are in 
AUTO. 02 heaters 1 and 2 are OFF, 3 is in AUTO. Hz fans 
1 and 2 are OFF, and 3 is in AUTO. 

CAP COM 16, the H2 tank 3 fan should be OFF. 

Okay. K2 tank 3 OFF. And, Houston, 
for your informational (garble), the gage has not moved 
since we equalized the two vehicles. 

CAPCOM Roger. Understand, 16. And, 16, would 

you verify optics power OFF? 

S C 

yet. 

CAPCOM 
S C 

CAPCOM 
S C 

CAPCOM 
S C 

Hank ? 

CAP COM 
Al snooze. 

S C 

n ow , 

CAPCOM 



No sir, we aren't ready to turn It OFF 
Ok ay . 

Houston, 16. Over. 
Hello, 16. Houston. 

Are you ready for a VERB 7A? 
Roger. We stand by. Go ahead. 
What did you do with the graveyard shift, 

Oh, that's lots of fun. I get to watch 

Okay. Direct 02 ' s (garble) coming up 

Roger. Copy. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/18/72 CST 01:46 GET 37:52 MC-127/1 



CAPCOM 
S C 
SC 

CAPCOM 
PAO 

of Apollo 16 . 



Direct 02 Is off 



A mod complete, 16 
Thank you. 
Ok ay , H ous t on 
Roger. Copy. 

This is Apollo Control at 38 hours in flight 
And we expect the crew will be beginning their 
scheduled 8 hour rest period shortly. Out here in Mission Control 
we're in the process of a shift handover. Flight Director Gene 
Kranz and his white team of flight controllers are coming on 
now to replace th-i, orange team headed ny Flight Director Pete 
Frank. The capsule communicator on this shift will be astronaut 
Hf.nk Hartsfield replacing astronaut Don Peterson in that position. 
And at the present time Apollo 16 is 137 239 nautical miles from 
Earth. Traveling at a speed of 3945 feet per second. 



PAO 

one portion of our 
Flight Director on 
Gene Kranz. At 38 
S C 

CAPCOM 
CAPCOM 
CAP COM 
CAPCOM 
you're way down in 
SC 

CAPCOM 
SC 

report for you 



This is Apollo Control. I would like to correct 
last announcement on the shift handover. The 
this shift will be Phil Shaffer rather than 
hours 4 minutes this is Apollo Control Houston. 

Houston, Casper. 

Go ahead. 
Go ahead. 
Go ahead. 
If you' re 
re ad you. 
H an k ? 

now Ken. 
- - I got 



Hello, Casper. 
Casper, Houston, 



Cas pe r , 
Casper, 
th e mud . 
Can you 

Ok ay 
With 



Hous t on . 
Ho us t on . 

I c an ' t 
read now 
Much better 
the - - I sav 



trans mi t ting 



film Stat us 

And I'd like to ask you a question about the 
optics, I'd like to stow the optics instead of leaving them 
up, unless the temperatures are going to get to high. And the 
reason for this is that every time we run around pass 



the s un 



it s like thoowlng thru on 



CAPCOM 



Roger. 



a spot light inside 
St and by . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY M \Z 1 11 CST 2:04 GET 38:08 MC-128/1 



CAPCOM Okay, Ken, go ahead with your film 

status and we're looking at that stowing the optics. 

Okay, the magazine 00 reads 26, maga- 
zine November November is either 33 or 34 depending on how 
you look at it. 

SC We finished up the 16 millimeter mag 

on Alpha Alpha by taking specters of the - part of the LM 
paint that we think is shredding. Magazine Oscar and November 
have been used just for the targeted pictures - no extras. And 
I guess that's - we didn't take any other original pictures 
today except for the AA frames on the LM. Tomor- 
row we'll try to get some interior photography. 

CAPCOM Okay, Copy 26 frames on Oscar Oscar. The 

November November report we got last night was 33 frames. You 
didn't use any of it today? 

SC No. Just for that UV, So whatever it 

was last night, it must be one more. 

CAPCOM Okay. 34. And, Ken, it's okay to 

s t ow the optics. 

SC Okay, Henry, thank you. And I'd like 

to go ahead and take the voice com down before I turn 
the optics power off. I want to try and take on last 
look and see if I can pick up one of the planets as we turn 
around and I'd like to go ahead and knock off the voice. 

CAPCOM Okay, Ken, get the voice down and have 

a good night. 

SC Okay, Henry. See you in the morning. 

Good night to you. 

SC Houston, Casper. 

CAPCOM Okay, Casper, go ahead. 

SC Okay, I'm not sure what just happened. 

I just saw - down looking at the optics and all of a sudden 
I saw a warning light and I got a no attitude and a gimbal 
lock light, and my ball seems to, in fact - it looks like 
the platform may be frozen, although we're still in PTC here. 

CAPCOM Okay, we're seeing some telemetry. We 

saw something about the time you come on the line there. 

SC It shows the CDU's down 20. It's must 

be in gimbal lock. 

CAPCOM Stand by a little bit. Ken. We're 

taking a look at the telemetry. 

PAO This is Apollo Control at 38 hours 22 

minutes. That was Ken Mattingly reporting what appears to 
be a problem in the Guidance and Navigation System on the 
Command Module. His voice report came almost simultaneous 
with a warning light on the Guidance Officer's console and 
reports from the Guidance Officer to the Flight Director, 
Phil Schaffer, here in the Control Center. Mattingly's 



APOLLO 16 MISSION COMMENTARY kJlB/H CST 2:04 GET 38:08 MC-128/2 



description of the problem was that they had a warning light 
in the Command Module indicating no attitude. The gimbal 
platform frozen - we have an indication here of gimbal lock 
and course align and we're looking at that data right now 
to try to determine what it might mean. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY, 4-18-72, CST 02:19, GET 38:24 129/1 



CAPCOM Ken, just so can make sure we got it 

straight down here, could you run through again what you 
were doing, and then the sequence of events? 

SC Okay, Hank, I'm not real sure when it 

happened, I was trying to see if I couldn't pick up one of 
the planets in the optics and I was using P52 and I had 
gone in and I was calling option 3 and then putting in plan 
vectors out of the flight plan and I tried - I thought I was 
going to catch, I guess it was (garble). And it looked like 
I had just missed it and I was driving around just kind of 
looking around to see what I could see in the sky and waiting 
and trying to pick up Jupiter. And somewhere in there I 
guess I came down to zero the optics or do something and I 
looked down and saw I had a PGNCS light and I guess I had 
just recently - I guess I was about ready to give up on it 
and call POO and I think I had, in fact I think I called 
POO at or just before the time I - we ended up with the 
gimbal lock and the no attitude. Then it was just a couple 
seconds or so I guess before I called you about it, maybe 
15 s e con ds or so. 

CAPCOM Okay, you got gimbal lock - 

SC I can't think of any combination of 

DSKY inputs - 

SC I was trying to think if I could have made 

some combination of DSKY inputs that might of - had I gotten 
in almost the right inputs that I could have caused the 
problem but I don't see where using any verbs or nouns could 
have done this. 

CAPCOM Okay, you've got a gimbal lock and no 

at. Did you get an ISS warning? 

SC No sir, I did not. 

CAPCOM No guidance. 

SC And the noun twenties were approximately 

correct for both pitch and roll, although the middle gimbal 
angle was completely out to lunch. 

SC Houston, Casper. 

CAPCOM Go ahead Ken. 

SC I'd like for you to think about the 

effects of having me go ahead and do a verb 41, noun 20 to 
match up with the SCS. That thing's been drifting a good 
bit, but in any case, maybe I can get it close enough to have 
a starting point to try and pick up some things, I had been 
looking in the telescope just before this all happened and 
there's so much of these little particles out there that 
chances of recognizing a star pattern are extremely dubious. 
I'd like to try anyway, maybe we can work on something like 
the Earth, maybe the Sun, or something like that. 

CAPCOM (garble). 

CAPCOM Okay, stand by. 

S C Ok ay . 



APOLLO 16 MISSION COMMENTARY, 4-18-72, GST 02:19, GET 38:24 129/2 

CAPCOM Do you want to stand by on this verb 41, 

noun 20 until you get your gimbal lock removed? 

SPEAKER Okay, CAPCOM tell him we're working up. 
Thank you. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k I \^ } 11 CST 02:29 GET 38:34 MC-130/1 



CAPCOM Casper, Houston, We'd like you to hold up 

on the VERB 41 NOUN 20. We're working on procedures to try 
to get rid of the giinble lock. 

SC Okay. Did you have any data 

at the time this all happened or were you in the 

CAPCOM Roger. We had good high bit 

they're pouring over that now. 



c omi n g 
blind? 
rate data 



down 
an d 



SC 

CAPCOM 

SC 

CAPCOM 
inertial again and 
NOUN 20 enter-enter 

SC 



plus enter into that register 
lock light. Now 
CAPCOM 



Okay. I'll sit tight then. 
Casper, Houston. 
Go Ahead. 

Okay. We want to try to get 
what we'd like for you to do 
VERB 40 enter. 
VERB 2 3 NOUN 20 , enter. 



Th ank you. 

the platfo rm 
is a VERB 2 3 



Then you want me 
rid of the gimble 
41? 



VERB 



G DCX. 



20 



S C 

CAPCOM 
n ow Ke n . 
S C 

CAPCOM 
41 NOUN 
SC 

Is that 
CAPCOM 
CAPCOM 

S C 
S C 

CAPCOM 
their looking 
going on h e re . 

SC 

P AO 

40 minutes ground 
is command module 
Mission Control, 
platform appeared 
SC 

completely out of 
CAPCOM 



Okay, I got 
you'd like me to do a VERB 
VERB 40 enter. 
Okay. VERB 40, enter. 
Okay. Our data shows the platform 



to put 



inertial 



Rog. 

Ok ay 



And that appears that way from here to. 
Ken, you can go ahead now with your 



This will be 



course in line to the 



Okay 
cor re c t ? 

That's affirm. 
Ken , h o Id up on 
( garble ) 

I'll go ahead and load it but won't enter. 
Okay. The guidance has got a little thing 
at talking to people in the back room. Little discussion 



that VERB 41 just a second 



Okay. I won't do a thing. Thank you. 
This is Apollo Control Houston at 38 hours 
elapsed time. What you've been listening to 
pilot Ken Mattingly talking back and forth with 
We had an earlier indication that the IMU 
to be in a gimbal lock. Mission - - 

Houston, are the GDC ball and the IMU ball 
s igh t? 

Al, actually their not that far out. Their 
like 10 degrees in outer gimbal and let's see the - - the little 
gimbal is off by about 2 degrees, the inner gimbal no more than 
3. Lot's closer to 2 degrees. 

CAPCOM Roger. That's - - 

SC (garble) we're close. 

PAO Mission Control has been going through a 



APOLLO 16 MISSION COMMENTARY 4/18/72 CST 02:29 GET 38:34 MC-130/2 



PAO series of procedures with Ken Mattingly to 

alleviate the girabal lock - - lock situation. Presently the 
platform is inertial. We'll stand by as series of VERBS and NOUNS 
have been passed up to the spacecraft Casper. We're at 38 hours 
42 minutes ground elapsed time. Apollo 16 now 138 786 nautical 
miles away from Earth. This is Apollo Control Houston. 

END OF TAPE 



AI'Ol.LO lb MISSION COMMENTARY 4-18-72 CST 02:36 GET 38:42 131/1 

CAPCOM Casper, Houston. 

SC Go ahead. 

CAPCOM Okay, I think chat the agreed on 

procedure here - is to go ahead with the Verb 41 Noun 
20. That's procedure - in the G&C checklist - 7-1. And 
reset the REFSMMAT - REFSMMAT flag and pass on through that. 

Oka}'. I guess, based on our drifts, 
I'm not sure that's any better, but I quess that's no worse, 
so I'll just go to that one, then. 

CAPCOM Okay. 7-1. 

SC Okay. That's page 7, past 1. I under- 

stand. 

PAO This is Apollo Control, Houston, at 

38 hours 54 minutes ground elapsed time. Command Module 
Pilot Ken Mattingly now going through a series of Verbs 
and Xouns, trying to align the IMU platform to the gyro 
display coupler. We presently show Apollo 16 at a distance 
of 1 39,24 3 nautical miles away from the Earth. Continuing 
to monitor, this is Apollo Control, Houston. 

SC Hank, it'snotclear, Iwon'tbeable 

to find any stars with no closer alignment than I have on 
this thing. Looks like I'm going to have to get a coarser 
alignment by using some big objects like Earth or something 
like that. 

CAPCOM Okay, are those particles out there 

giving you a lot of trouble? 

SC That's all there is. They're just 

everywhere. When you combine them ^irith the limited area 
that you have to look in because of the LM reflections, you 
find the telescope to be very unsatisfying. 

CAPCOM Casper, Houston. Why don't you go 

ahead and try them with the Sun and the Moon? You've got 
a filter for the Sun, right? 

SC That's affirmative. 

PAO This is Apollo Control, Houston, at 

38 hours 59 minutes ground elapsed time. That was Ken 
Mattingly reporting difficulty sighting stars through 
the optics - those desired stars for alignment - because 
of the vast number of particles. The update from, CAPCOM 
Hank Hartsfield indicated a go-ahead to try the alignment 
using the larger objects - in this case, the Sun and the 
Moon - for alignm.ent. We show Casper's onboard computer 
program in Program 52 - this is a platform alignment pro- 
gram - as Command Module Pilot Ken Mattingly presses on 
with his procedures. Apollo 16 is now 1 39 , 452 nautical 
miles away from the Earth, and this is Apollo Control, 
H o us t on . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY, 02:54 CST, 38:59 GET, MC- 

PAO Apollo 15 is now 139 452 nautical miles 

away from the Earth and this is Apollo Control Houston. 

PAO Apollo Control, Houston. 39 hours 3 minutes 

ground elapsed time. Guidance reports that command module 
pilot to Ken Mattingly is half way through his platform aline- 
ment. He has performed his mark on the sun and he is now 
proceeding with his mark on the moon. We're at 39 hours 
4 minutes continuing to monitor. This is Apollo Control, 
H o us t on . 

SC Houston, Casper. 

CAPCOM Go ahead. 

SC Okay. I used the earth and the sun and I 

got four balls 7, which I think is going to be a significant 
i iip r o vemen t . I'd like to go ahead and see what those torquing 
angles turn out to be. 

CAPCOM Roger. We concur. 

SC Okay. That looks about right for the 

amount that 1 had to correct for it. It's kind of hard to 
mark on the earth because you have to guess where the terminator 
really ought to be. 

SC Do you have those torquing angles? 

CAPCOM Roger, Ken. Go ahead and torwue. 



END OF TAPE 



APOLLO ]6 MLSSION COMMENTARY 4/]8/72 GET 39:09 CST 03:04 MC-]33/] 



PAO This is Apollo Control Houston, 39 hours 

9 minutes ground elapsed time. We now show Apollo ]6 at 
]39,788 nautical miles away from Earth. Command module Ken 
Mattingly in using the E arth and Sun for platform alignment 
through the optics reports significant improvement over his 
earlier attempt in the star sighting. We'll continue to 
monitor conversations between command module pilot Ken 
Mattingly and CAPCOM Hank Hartsfield here in Mission Control. 

SC Okay Henry if you have those angles, 

I'll torque these. 

CAPCOM Ken, what was your NOUN 05? 

SC 4 balls 1. 

CAPCOM Roger. 

SC OK, I'll torque these on the minute 

on e one. 

CAPCOM Okay, clear to torque. 

PAO This is Apollo Control Houston at 39 

hours 11 minutes, Mattingly doing a second P52 platform 
alignment this time using 2 stars for sighting and in this 
way the fine tuning his earlier improvement if possible 
with the Sun in -- Moon -- Earth and Sun as reference. 
We're at 39 hours 12 minutes ground elapsed time and we 
now show Apollo 16 at an altitude of 139,9 0 7 nautical miles 
away from the Earth. 

Okay, looks like we are pretty much on 
target now and I don't see any reason to torque these again, 
unless you particulary want to. 

CAPCOM Okay, we concur Ken, don't torque those 

and we want to check a few switches. They're working on now 
getting a switch check list and then we're going to let you 
get some rest and smoke the Beta over during the night and 
have a score for you in the morning. 

SC Okay, can you give me any -- can you 

give me any cursory ideas of that just the same, if there's 
any possiblity I entered something inadvertently. Or does 
it take too long to sort all that out? 

CAPCOM Okay, the preliminary look here we think 

its a hardware problem Ken. Some sort of a transit problem and 
when we get the data in here we'll be able to tell a little 
more about it. 

SC Okay. Guess I'm sorry to hear that. 

CAPCOM They don't think at this point that it's 

anything that you did and it appears to be a transit problem 
but we won't know till we take a look at it. 

SC Okay. Let me give you one other little 

tidbit that now seems to be somewhat more of interest than 
it was before and that's that ~~ when I take this optics zero 
to zero the area around the shaft P pack makes alot of -- alot 



APOLLO ]6 MISSION COMMENTARY 4-]8-72 GET 39:09 GST 03:04 MC-133/2 



SC more noise than the one (garble). It 

seems to me that's it's making more noise now than it used 
to. When I say used to, when we first started out. When 
we first started out they were very very quiet and you 
couldn't even here them running and now they're getting 
nDisier -- that may be typical but it's just one more thing 
tiat -- I guess we'll throw out all these things I'll 
try to minimize them number the times I zero the optics, at least 
with the zero switch. 1*11 use manual wherever possible. 

CAPCOM Okay, that only occurs when your zeroing? 

SC That's perfect. Well actually Hank, I 

just tried in a manual and it occurs when the noise occurs 
and whenever I'm in a extremely high rate. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY, 4-18-72, CST 03:11, GET 39:16 134/1 



SC Well, actually Hank, I just tried it in 

manual it occurs when the noise occurs and whenever I'm in an 
extremely high rate, you know like using high in a max shaft 
rate. 

Ro ge r , copy . 

Okay, Ken, we would like to check some 



CAP COM 
CAP COM 
switches up 
SC 
S C 

CAPCOM 
scale. 

S C 

CAPCOM 
S C 

set, and the 

CAPCOM 
th ank you. 

SC 

sleep then. 
CAPCOM 
CAPCOM 
CAPCOM 

S C 

CAPCOM 



on panel 1. 

S t an d 
Okay, 
Ok ay , 



by , sir. 
go ahead, 
we'd like 



Hank. 

to check 



position in FDAI 



The scale is in 51. 
Okay , select. 
Select is in 1 amp, 
attitude set is in GDC. 



the source is in attitude 



s ome 



Okay, that's what we wanted to know, 

go ahead and get 



Okay, and I think I'll 
Getting (garble) yet? 

Okay, stand by and let me check. 
Okay, Ken we have everything out. (garble) 
Casper, Houston. 
Go ahead. 

Okay, you caught us on the antenna switch. 
We don't have anything else for you. We'll look at the data 
over and get the word up to you tomorrow. It looks like to 
us now that you can get a full 8 hours sleep. 
SC Okay, thank you. 

CAPCOM See you tomorrow. 

SC Okay, Hank. How about making the dollar 

shift. 

CAPCOM Rog. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY Ml^/ll CS T 03:25 GET 39:24 MC-135 

DEAD AIR 

END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4-18-72 CST 03:25 GET 39:30 136/1 



SPEAKER Honeysuckle COMTECH, Houston COMTECH. 

Net 1. 

SPEAKER Honeysuckle, loud and clear. 

SPEAKER Roger. You the same. Thank you. 

SPEAKER Roger. 
SPEAKER (Garble.) 

PA.0 This is Apollo Control, Houston, at 

39 hours 30 minutes ground elapsed time. We presently show 
Apollo 16 at a distance of 140,597 nautical miles away from 
the Earth. As you heard, Ken Mattingly has now been given 
the go ahead to start his sleep period. This being the 
case, we will go over and recount the activities that have 
just taken place regarding the Guidance and Navigation 
System, It - this activity was spurred when Mattingly 
saw a gimbal lock warning light onboard and a no attitude 
light onboard. This was verified by the Mission Control 
Team here on the ground. The first step taken the IMU was 
coarse aligned to the Spacecraft body. When this occurred, 
this alignment wiped out the roll attitude in reference. 
The first step, Mattingly was given the go ahead to unlock 
the platform with ground procedures, and this allowed the 
platform to go inertial. Initially, he tried to align 
the platform with stars. He was unsuccessful with the 
platform alignment with stars and this - primarily because 
of the debris around the Spacecraft. As the next step, 
he then used the Sun and Moon to align the platform and 
was very successful in this effort. Then the platform was 
tweaked in its alignment using the stars; and this was 
possible because the platform alignment with the initial 
planet reference was good enough to use the AUTO Optics. 
Here in Mission Control during this shift, we will be 
playing the recorded data, and this will be evaluated over 
the course of the shift. Initially, it appears to be a 
transient problem. We're at 39 hours 33 minutes ground 
elapsed time. We show Apollo 16 140,686 nautical miles 
away from the Earth. Velocity now 3854 feet per second, 
and this is Apollo Control, Houston. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY, 4-18-72, CST 03:31, GET 39:36 137/1 



PAO This is Apollo Control Houston at 40 

hours 35 minutes ground elapsed time. We presently show 
Apollo 16 at an altitude of 142 ,9 78 nautical miles, this 
from Earth and traveling at a speed of 3779 feet 
per second. The crew is now sleeping after a flurry of 
activity related to a - the guidance and navigation system. 
Ken Mattingly, it appears, went to sleep at 40 hours GET, 
dozed off to sleep. At an earlier time 38 hours 22 minutes 
GET the command module had a gimbal lock warning and a no 
attitude light oi^jriird. This was verilied by the flight 
controllers here in the mission control center. The Inertial 
measuring unit had been coarse alined to the spacecraft body 
when this problem developed. It wiped out the roll attitude 
reference. As the first step. Ken Mattingly, command module 
pilot unlocked the platform with ground procedures allowing 
the platform to go inertial. A first attempt by Ken 
Mattingly to align the platform using stars was unsuccessful 
because of the debris around the spacecraft. He then used 
the sun and Moon asreferences to align the platform and 
this attempt was very successful. As a follow on step, 
Mattingly then tweakedthe alignment of the platform with 
the stars. He was successful in this second attempt because 
the platform at this time was good enough to use the auto 
optics. There has been very little conversation over the 
flight control loop here in the mission control center for 
the past 30 to 40 minutes. During this shift the recorded 
data is being replayed for a continuing evaluation. At 
present it appears that what we have seen is a transient 
problem to the guidance and navigation system. It should be 
eir.phasized Ken Mattingly did successfully realign the inertial 
platform before getting the go ahead to start his sleep period. 
A confirmed failure, of the IMU would give a no go for LOI , 
however at this time the guidance and navigation platform is 
completely stable and the ground control team here in mission 
control is satisfied. We're at 48 hours 38 - 40 hours 38 minutes 
ground elapsed time, we will at this point take down the 
air to ground loop because we expect no further conversation 
with the crew. This is Apollo Control Houston. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4-18-72 CST 05:24 GET 41:29 MC-138/1 



^AO This is Apollo Control Houston at 41 

hours and 30 minutes into the Mission. We presently s?iow 
Apollo 16 at a distance of 144,956 nautical miles away 
from Earth. Velocity now reads 372 4 feet per second. We 
have had no conversation with the crew of Apollo 16 since 
our last report. The crew is presently in their rest period. 
Our Flight Director for this shift is Phil Shaffer. It is 
his first stint in the role of Flight Director. Until this 
Mission, Shaffer has worked as Flight Dynamics Officer in 
the Mission Control Center. He is one of the new Flight 
Directors designated for the Skylab Program. Our CAPCOM 
for this shift is Astronaut Hank Hartsfield. He does not 
expect to have anything further to say to the crew of Apollo 
16 for this shift. Since our countdown clock in the Mission 
Control Center shows 5 hours 59 minutes of time remaining 
until wake-up time, this will put the wake-up time about 
two hours beyond that called for in the Flight Plan. We're 
at 41 hours 31 minutes into the Mission, and this is Apollo 
Control Houston. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4-18-72 GET 42:29 CST 06:24 MC-139 



PAG This Is Apollo Control Houston at 42 hours 

30 minutes since liftoff. We presently show Apollo 16 at a 
dilstance of 147,092 nautical miles away from the Earth, 
velocity now shows 360,065 feet per second. We've had no 
conversation with the crew of Apollo 16 over the past hour. 
There are some 5 minutes remaining on the sleep period. We're 
a-; 42 hours and 30 minutes ground elapsed time and this is 
Apollo Control Houston. 

PAG This is Apollo Control Houston at 42 hours 

32 minutes ground lapsed time. We ii a correction to our 
last report. A sleepy commentator reported 5 minutes re- 
maining on the sleep period of the Apollo 16 crew, that should 
have been stated 5 hours remaining. I repeat, 5 hours remain- 
ing of crew sleep. We're at 42 hours 32 minutes into the 
mission and this is Apollo Control Houston. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/18/72 CST 7:2hA GET 43:30 140/1 



■PAO This is Apollo Control Hotiston at 43 

hours 30 minutes into the flight of Apollo 16. We now show 
the Apollo 16 spacecraft at a distance of 149 191 nautical 
miles away from the earth and now traveling at a speed of 
36 08 feet per second. At the present time, the crew of 
Apollo 16 is asleep. Also, at the present time, the Mission 
Control Center here in Houston is receiving periodic data 
from the Apollo 16 spacecraft due to an inability to switch 
antennas by ground command. At present, here in Mission 
Control, we're receiving 11 minutes of data, and 7-1/2 min- 
utes of data dropout. This will become a troubleshooting 
exercise with the crew after the crew awakens. The ENKO 
flight controller has tried through the Madrid and Carnarvon 
stations, but thusfar, has not been able to get in commands 
to switch antennas. This inability in antenna switching 
from the ground is why we're receiving the periodic data. 
The crew will remain in their sleep period for 4 more hours. 
At 43 hours 32 minutes ground elapsed time, this is Apollo 
Control Houston. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY CST 8:24 AM 141/1 



PAO This is Apollo Control, Houston, at 44 hours 

30 minutes into the mission. Now we presently show Apollo 16 
at a distance of 151 2 16 nautical miles away from the earth. 
Velocity now reads 5353 feet per second. Flight Director 
Phil Shaffer has decided to update the crew wakeup time by 
1 hour. This being 1 hour earlier because of the work day. 
This 1 hour will allow spare time for troubleshooting as- 
sociated with the antenna switching. There will be a change 
of shift briefing at 9:30 AM in the News Center Briefing Room. 
Participants will include Flight Direct^,! Fhil Shaffer and 
Guidance and Flight Controller Gary Coen. The Gold Team of 
flight controllers headed by Flight Director Gerry Griffin 
is scheduled to take over at 46 hours ground elapsed time. 
At the present time, we show 1 hour 59 minutes from time of 
crew wakeup. At 44 hours 31 minutes, this is Apollo Control, 
H o us t on . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/18/72 CST 9:18 GET 44:24 142/1 

PAD This is Apollo Control at 45 hours 

24 minutes ground elapsed time in the mission of Apcllo 16. 
The spacecraft at the present time is 153 107 nautical miles 
out from Earth. Velocity 3504 feet per second. Here in the 
Mission Control Center, the Gold Team of flight controllers 
is taking over headed up by Gerry Griffin, from the off- 
going shift of flight controllers headed up by a new 
flight director named Phil Shaffer, Phil Shaffer's press 
conference will take place in the News Center Auditorium, the 
Houston News Center, in about 10 minutes. The crew of Apollo 
will be waked up in a little over an hour. The first order 
of business upon awakening will be to sort out some problems 
that have arisen during the night on uplink commands to the 
spacecraft, and also gimbal lock problem in the inertial 
measurement unit that was encountered during the night when 
Mattingly was realigning the platform, both of which may just 
go away. That remains to be seen. And at 45 hours 26 minutes 
ground elapsed time, this is Apollo Control. 



END OF TAPE 



AFOLLO 16 MISSION COMMENTARY hjl^jll CS T 9:55AM GET 46:01 143/1 



PAO This is Apollo Control. 46 hours 1 minute 

ground elapsed time, and about 30 minutes early, the, or ahead 
of the scheduled wakeup time, the crew has called Mission Control. 
We have a few seconds of accumulated tape caught unawares. Then 
w£: will rejoin the conversation with the crew of Apollo 16 live. 
Let's roll the tape. 

SC This is Apollo 16, just fine. 

SC Houston, how do you read Apollo 16, over? 

CAPCOM 16, your loud and clear. How me? 

SC I read you the same. Good morning to you. 

CAPCOM How are you doing this morning? 

SC Doing great. I guess that sort of depends on 

what you can say about the old platform. 

CAPCOM Roger. Okay, 16, the gimbal lock and the 

course line that you had back at 38 plus 18, was caused by a 
CDU transient in the YAW axes. The transient was induced when 
the TVC relay was disabled. Relay is normally inabled when the 
OPTICS is in manual and disabled when you select POO, and that's 
the kind of situation you are in when that occurred and Ken had 
just selected POO and he had prior to that been using the OPTICS 
manual. And they say that this type transient has been observed 
in CSM 117 testing, and we're presently looking at a soft way of 
work around for LOI and we'll get some more words to you later 
on this, on this same schedule. 

SC Now your talking. That's the best news I've 

heard today. So far. 

CAPCOM Okay, and John, we've had some problems here 

getting commands up to the bird, real time commands. And we've 
got a command cancell we want to run. And we'll be standing by 
as soon as you can get it ready let us know and we'll get into. 

SC Okay. We've got seat flops to do and we'll 

let you kn ow . 

CAPCOM Roger. 

CAPCOM 16, in a situation we're in now, we've only 

got 1 OMNI we can read and we can't command. So we're only get- 
ting about 11 minutes of low bit rate data out of every 18 while 
you are in PTC. It's possible that we might loose you, if so just 
stand by and we'll pick you up again. 

SC Okay. We're ready for that command test, Pete. 

CAPCOM Okay. 

CAPCOM Okay, Charlie. We're going to go 1 step at 

a time. First thing we want to do is up telemetry command reset 
and then normal. 

SC Okay, you want a command reset In normal? 

CAPCOM Charlie, we want the up telemetry switch to 

reset and then normal. 

SC Roger, it's reset normal. 

CAPCOM Okay, Charlie. Stand by we're going to try 

some commands. 



APOLLO 16 MISSION COMMENTARY hlYZIll CS T 9:55AM GET 10:21 143/2 



CAPCOM Okay, Charlie. That apparently didn't work. 

We're going on in that we want to cycle the up telemetry switch 
OFF for three seconds, and then back to normal. 

SC Roger. It worked. 

CAPCOM Relay is normally Inable when the OPTICS is 

in manual and disabled when you select POO. And that's kind of 
the situation that you were in when that occured and Ken had Just 
selected POO and and he had prior to that been using the OPTICS - 
We may have to put him up there anyway Charlie. 

SC Give me the updates, Phil. 

CAPCOM 16, Houston. I've got about 3, a couple of 

3 updates to the flight plan when ever your, it's convenient for 
you, we'll read them up. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/18/72 CST 9:55AM GET 46:01 143/2A 

CAPCOM Okay, Charlie. That apparently didn't work 

We're going on in that we want to cycle the up telemetry switch 
OFF for three seconds, and then back to normal. 

SC Roger. It worked. 

SC Okay, your back to normal. 

CAPCOM Okay, we're trying commands now, Charlie, 

stand by. Okay, Charlie, that apparently cleared it up. 
SC Okay. 

CAPCOM And, Charlie, we've got commands again 

and we'll handle Lie antenna and the bitraCe for you now. 
S C Ok ay , f i n e . 

CAPCOM To repeat an old phrase, Charlie, we had 

a lot of people down here turning blue on this flight till that 
last little situation got cured there. 

SC Was that, that IMU problems? 

CAPCOM No the comm problems. 

SC Well you could put Fendell in the back 

up Mode. You could put him up on top of the building. 

CAPCOM We may have to put him up there any way, 

Charlie . 

SC (laughter) afraid so. 

CAPCOM Relay is normally inable when the OPTICS is 

in manual and disabled when you select POO. And that's the kind 
of situation that you were in when that occured and Ken had 
just selected POO and and he had prior to that been using the 
OPTICS -- We may have to put him up there any Charlie. 

SC Give me the updates, Phil. 

CAPCOM 16, Houston, I've got about 3, a couple of 

3 updates to the flight plan when ever you're, it's convenient 
fcr you, we'll read them up. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/18/72 CST 10:31A GET 46:37 144/1 



sc 


Don, you about ready for 


a 


11 


tt le 


tatus report? 












CAP COM 


Stand by a minute 


, Ken . 








CAP COM 


Ok ay , Ken . We ' re 


all set 




G 


o ahead. 


CAP COM 


Ok ay , Ken . We ' re 


all set 


• 






SC 


( garble) 










CAPCOM 


Casper, Houston. 


How do 


yo 


u 


re ad me ? 


CAPCOM 


Casper, Houston. 


How do 


yo 


u 


read? 


CAPCOM 


Casper, Houston. 


How do 


yo 


u 


read me? 


CAPCOM 


Casper, Houston. 


Do you 


re 


ad 




S C 


( garble) 










S C 


Houston, Casper. 










CAPCOM 


Casper, we read you loud 


an 


d 


cle ar . You 



read me? 



How do you read? 
Ove r . 

you re ad us ? 



CAPCOM Casper, Houston. 

SC Houston, Casper. 

CAPCOM Casper, we read you. Do 

SC Houston, if you're reading Casper, we' 

transmitting you (garble). We have signal strength of a 
leader of about 60 percent, we're not receiving you, and 
based on your comment about the antennas we'll wait about 



re 



5 minutes and 
CAPCOM 

Ho us t on ? 

CAP COM 

SC 

Don . 



then try again before 
16, y o u ' re loud 

Casper, Houston 
Roger. We lost 



you 
an d 



change the configuration, 
clear. Do you read 



CAPCOM 
you read me okay? 
SC 

CAPCOM 
time. Apparently, 

CAPCOM 
the ground. We'll 
min ute . 

S C 

SC 



Roger . 



you 
You're lo ud 



there for 
and clear now 



awhile , 
Do 



Loud and clear. 

Roger. You were loud and clear all the 
you just lost us. 

16, the comm problem may have been on 
try to find out and let you know in a 



Ro ge r . 

The background tone at the - the back- 
ground noise that the system is making right now is a 
little different then it was making before if that would 
help you any to figure out what the problem was. It's 
almost like it wasn't uplinking, maybe. 
CAPCOM Roger, 16, 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hll^jll CST 10:41 GET 46:48 145/1 



SC The background told at the — the 

background noise that the system is making right now is 
a little different than it was making before. They'll help 
you figure out what the problem was. It's almost like 
you weren't uplinking maybe. 

CAP COM Roger, 16. 

SC Okay Don, if you're ready I'll give you 

some status reports. 

CAPCOM Stand by just a minute. Ken. Okay 

Casper, go ahead v; ith your status report. 

SC Okay. I'm using that famous old trick 

on how to get someone to talk to you, but every time I pick 
up a juice bag and get half way down, why it seems like 
we are able to establish com. So I'll start with the 
Commander's list and I'll go through and I'll skip the 
menus since they are on separate pages and I'll come back 
tD them. So let's start with A- 1 22035, alpha 3, 7 good, 
alpha 4, none, alpha 5, 191518, alpha 6 , 656 N3 , that's 
a total of 4. Going to Bravo. Bravo 1 15035, 5 good, 
that's on Bravo 3. Bravo 4, none. Bravo 5, 103025, Bravo 6, 
22 N5 . Charlie 1, 21059, Charlie 3, 7 good, Charlie 4, 
none, Charlie 5, 1530, Charlie 6, 77555. Okay, and if you 
want the menu stuff, I'll go back to that now. 

CAPCOM Okay, go ahead. 

SC Okay. For John, and that's for day 

two meal B. So scratch the bread and peanut butter. On 
meal C, scratch the frankfurters, add an orange drink. 
Okay, on Bravo 2. Are you still there, Don? 

CAPCOM Affirmative, we're getting a lot of 

background noise. 

CAPCOM 16, hold off a minute we'll switch 

on receiver -- hold off a minute 16, we'll switch OMN I ' s . 

CAPCOM Okay Casper, go ahead. 

SC We're not getting your signal. Okay, 

starting on — where did you copy last? 

CAPCOM Okay, we got John, day two, BO 

Charlie complete and we're ready, I guess, for Bravo. 

SC Okay. Bravo 2, on meal A you can 

scratch sausage patties and orange juice and fruit cocktail. 
On Bravo, that's meal B, you can scratch turkey and gravy, 
vanilla pudding, bread, peanut butter. On meal C, you can 
scratch the chocolate pudding. Going to Charlie 2. 

CAPCOM Okay. 



APOLLO 16 MISSION COMMENTARY A/18/72 CS T 10:41 GET 46:48 145/2 



SC On meal A, scratch the sausage patties. 

Meal B, you can scratch the bread and peanut butter. Meal C, 
you can delete two of the frankfurters and scratch the 
chocolate pudding. 

CAPCOM Okay Casper, we copied all that. 

SC Okay, and a couple of otherwordshere 

on the -- we've got ALFMED coming up and to date Charlie 
saw some flashes the other night. And, not a whole heck 
of a lot of them last night. And I'm not sure I have seen 
any at all yet, and John may or may not. So what we'd thought 
we'd do here is -- we've got a little more house cleaning 
to do here and finish our chores. And we'll probably take a 
look at what we see and if Charlie is seeing sufficient -- 
enough flashes that he is pretty sure he's seeing things, 
why we'll go ahead and run the experiment now. And if we 
aren't seeing a sufficient number that looks like it 
justifies sitting here for an hour with it, why won't you 
think about saving it until such time as it looks like 
maybe we see more of them? 

CAPCOM Okay, Ken, we'll think on that a little. 

And also, I've got a note on the Nikon camera light meter 
here in connection with the ALFMED photography. 

SC Okay stand by another second. 



END OF TAPE 



AFOLLO 16 MISSION COMMENTARY l^H^Jll 1052 CS T 46:58GET 146/1 



CAPCOM Ken you don't really need to copy much I 

think because you've got the camera head in there where you 
c£in look at it. I can give it to you in a few words. 

SC Yo\i know one of the things that we need 

ir. this program is some octupuses. 

CAPCOM Rog. 

SC Okay, Don, I don't have the camera but how 

at out just reading to me whatever it is you wanted to say and 
I'll write it down here. 

CAPCOM Okay. It's probably not worth writing down 

ejicept a little note to remind you the camera was observed to 
hiing up in the battery check position full down. When you hit 
the camera light meter on, check, and what we want you to do is 
the little button on top of the camera there has a white band 
around the base of it, they want to make sure that white line 
i El visible on the light meter switch button. If it is not 
visible you can take your fingernail and catch the top of that 
button and pull out on it until the white line is visible, and 
thien verify that the meter is operating by holding the camera 
ui> to a light and observing the meter response to burning light 
levels . 

SC Rog. We'll make sure it works before we 

use it. 

CAPCOM Okay, Ken. That's all I've got on that one. 

SC Houston, 16. 

CAPCOM Go ahead 16. 

SC Rog- Flash with a hot report here. Pass 

on to the chefs that the grits were delicious. 

CAPCOM Say again, Charlie. I didn't copy that. 

SC I said pass on to the chefs that the grits 

wtire delicious. 

CAPCOM Roger, will do. And for Ken's information 

ttie status report that we'd just gotten was excellent as far 
as format and readability and everything. Doc said he really 
appreciates it. 

SC Always playing the helper. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 1\/12,J71 CS T 11:21 GET 1*1:11 147/1 



PAD This Is Apollo Control. 47 hours and 27 minute 

into the mission of Apollo 16. Crew awake now. Presumably con- 
ducting either the ALFMED experiment or beyond the eat period. As 
a matter of fact, part of their first activities after wakeup, was 
the status report, which all the parts not eaten, in other words, 
negative reporting on the meals for the three crewmen are read 
down. Also the problems with the commanding through the OMNI antennas 
have cleared themselves up, with the crew cycling a switch OFF to 
back ON again, which cleared the logic in the switching circuit. 
And everything is properly working now in that area. As soon as 
the crew completes the current housekeeping activities, the trouble 
shooting precedures for the Inertial measuring unit and the 
Guidance and Control System, Guidance and Navigation System will 
be read up to the crew, and they'll persue that problem. As a 
little aside to the crew food report, Charlie Duke, a good southern 
boy from South Carolina, said "pass on to the chef that the grits 
were delicious". Grits having been packed in the menu on his 
request. Present distance of Apollo 16 , 157,253 nautical miles 
out from earth. Velocity ever decreasing as we near the cross 
over point. Now 3,396 feet per second. Total spacecraft weight 
still 102 ,890 pounds. We're continuing to leave the circuit live 
by ground noise and all, as we anticipate resumption of communications 
between spacecraft communicator Don Peterson, and the crew of 
Apollo 16, for the day's activities. This is Apollo Control at 
47: 30. 

SC 

CAPCOM 

SC 

look? 

CAP COM 
CAPCOM 

SC 
SC 

CAPCOM 
SC 

CAPCOM 
SC 

you gave 



Houston, 16, over. 
Go ahead. 

Okay, Pete, I'm up on 



BIO-MED. 



How does it 



S t an d 
Okay , 
Okay, 



data 
LOI ? 



by one. 

the BIO-MED data looks good, 
thank you. 
You can tell Charly's 
It looks that way. 
We've been suspecting 
Rog. 

based on the burn yesterday, is the 



still breathing, uh . 
It up here all along 



us 



H o us t on , 
for the SPS 



burn card still going to hold for 



CAPCOM 
S C 

we're going to have 
is it. 

CAPCOM 
S C 

CAP COM 
have to do some 



Stand by a minute. 

And the other question is, does it look like 
another midcourse and which one and how much 



Okay, we'll get back to you in a minute. 
Okay, thank you, Fete. 

Okay, 16, on the burn card, we will probably 
more updating. We'll get to that tomorrow, and 



on the mldcourses, the midcourse 4 right now looks like it's less 



APOLLO 16 MISSION COMMENTARY 4/18/72 CST 11:21 GET kl\ll \klll 



CAPCOM than 1 foot per second. If it get's much 

bigger, we'll probably do it. But we'll advise you. 

SC Houston, 16. Your breaking up badly. How 

do you read us, over? 

SC (garble) 

SC Okay, Houston, (garbled) on the burn card. 

CAPCOM Okay, 16. If you read, we probably will have 



to do some updating on that, on that pad, and we'll let you know 
on that. We'll update it tomorrow. And on the midcourse 4, 
midcourse 4 is looking pretty small. Less that 1 foot per second 
now. If it gets larger, we'll probably go ahead and do it, but 
we'll keep you advised on that. 



SC Houston, you uplink keeps fading in and out 
on you. 

CAPCOM Roger, 16. We're switching on that. 

SC You're fading then. 

S C H o us t on , 16 - 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hJlQ/ll GST 1I:33A GET 47:39 148/1 



SC 

CAP COM 



Houston, 16. Do you read 
I read you loud and clear. 



us now; 



Do you read 



me 



las t 



you same. You faded out on your 



On that 
And right 
s e c- 

w e 



'11 



SC Read 
transmission again. 

CAPCOM Okay, hang on a minute till the comm 

clears up a little bit and then I'll come back to you. 
S C Ok ay . 

CAPCOM Okay, 16. Let's try it again, 

updating the pad, we'll get that to you tomorrow, 
now midcourse 4 looks very small, less than 1 foot per 
ond. If it gets larger, we will probably do it, but 
keep you advised on that. 

S C Outs tan ding . 

SC Just to review that SPS pressure system, 

as near as I can make out, it's purely - we don't actually 
Delta-P. It's just - of about more than 5 psi, what 

difference. Is that not correct? 
CAPCOM That's affirmative, John. There's a 

chamber in there - a reference chamber that's supposed to 
be at atmospheric pressure. It is apparently vented to a 
vacuum condition, which brings in about about 



h ave a 
we do h ave 



b i as 



Th en 
SC 

look at them 
CAPCOM 
SC 

CAPCOM 
meters - the 



a 14.7 psi 
on top of that, 
the two meters as we 
Is that not correct? 
corre ct . 



there's a 5 psi meter bias 
Okay, so actually, 
now are actually balanced 
I b el ieve that's 
Okay . 
John, the 
actual pressures 
they're reading differently. 

SC Okay, we got the message. 

SC Houston, 16. Will we need 

battery B? Just looking ahead in 
bit. 

CAPCOM Just a moment 

CAPCOM Okay, Charlie 

start charging the battery now. 
SC Rog. 

SC Okay, Pete, Bat B is on charge 

CAPCOM Understand. Bat B on charge. 



actual pressures on both 
are the same, although the meters 



to charge 
the flight plan a little 

You can go ahead and 

n ow . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 11:50CST 47:56GET h/lZjll 149/1 



S C Ho us t on , 16 . 

CAPCOM Go ahead 16. 

SC ■ Okay, Pete. We got you. Finally had time 

to look out the window and you are just coming into view again. 
J VIS t as pretty as ever. 

CAPCOM Very nice. What you looking at right now? 

CAPCOM Can you tell what part of the earth? 

SC 

CAP COM 
looking at? 

SC Well, we've gothalfearth andweseea 

l£ind mass, we see the North Pole. The North Polar cap with 
tvo big swirls coining off of it to the southwest. I can see 
the subsolar point very distinctly. It is a big white dot in 
the center towards the LM, away from the terminator and there 
is a big land mass that is visible in the center and can't 
really make out exactly what it is. It's clear clouds though. 



I've got a half earth. Say again! 

Can you tell what part of the earth you're 



the only place that's fairly clear. 



It ' s 

CAPCOM 
Ye ah tha t ' s j us t 

SC 
n £1 1 o r ? 

CAPCOM 

SC 

y e; ah . It's 
Atlantic Ocean 

CAP COM 

SC 

and the blue of 



Okay, we show you directly over North Africa, 
about the terminator. 

Okay, you've got North Africa at the termi- 



J us t ah out . 

Ok ay J that's what it is, and looking at it, 
Africa. Looks like a good storm system up in the 
and above the subsolar point. 
Roge r . 

The blue coloring - the white of the clouds 
the Ocean, Dick. Things just stayed pretty 



c cms tan t 
S C 

CAP COM 
S C 

ir the trenches? 
CAPCOM 
SC 



as we moved out it is still a spectacular sight. 
Houston, 16. Over. 
Go ahe ad , 16 . 

What do they think of this 



PTC down there 



This is looking real good. 
It really does look good. 



to congratulate, Ken or the computer? 



CAPCOM 

SC 

CAPCOM 
number of light 
try the ALFMED. 

SC 

CAPCOM 
SC 

CAP COM 
S C 

CAP COM 



I don't know who 
Ken credit for that one. 



I guess we'll give 
You're darn right. 

16, let us know what you think about the 
flashes and whether or not it is feasible to 



Ok ay . 
Ro ge r , 
That is, 
Ri gh t . 
That's a 
( garb le ) 



It's in work right now. 
, if you can work on (garble). 

load. 



low belt bolide 
I un de rs tan d. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY CS T 12:10 GET 48:16 150/1 



SC Okay, Houston, we're going to start on 

the update now, and I guess it it'll take us about an hour 
and a half from the time we start to the time we finish up. 

CAPCOM Okay, and do you think you are seeing 

enough light flashes to make it valid? 

SC They haven't gotten around to doing yet, 

but we're working on it. 

CAPCOM We'll roger instead. 

SC Don, Charlie saw some this morning when 

he got up and so we're going to put the ALFMED on Charlie and 
we will not turn it on until we start seeing flashes and if 
we don't see any, we'll just terminate it. We'll wait till 
some reasonable time and we'll talk it over with you. We'll 
tell you when we're ready to go through it. That's our present 
p 1 an . 

CAPCOM Okay, Ken, we'll be standing by. And, Ken, 

while I'm talking to you, we've got a little more information 
on this platform problem and it's a fairly big mouthful, so, 
sometime when you get a chance when you can copy some information, 
give me a call. 

SC Okay, it looks like it will be a while. 

CAPCOM Roger. We don't want you to get into 

another P52 before we have time to talk about it. 

SC All righty. Pete, a little background 

on these light flashes -- 

CAPCOM 16, Houston, we missed your comments on 

the light flashes. You started to give them to us and you 
were blocked out by noise. 

SC Roger, Pete. We're just telling you -- 

the first night during the first week or whatever that was GET, 
I saw numerous light flashes before going to sleep probably 
as quick — as high as 3 or 4 minutes. The next morning, they 
were not as numerous as that and then last night still not as 
numerous. This morning, I was perhaps seeing maybe one every 
couple of minutes or so. If that frequency repeats itself 
during this test, is that good enough to go ahead? 

CAPCOM Staadby one, Charlie. Okay, Charlie. If 

you see one every minute or so, that's enough to go ahead. 

S C Ok ay . 

CAPCOM And 16, at 48:30 in the flight plan, there's 

a line that says synchronize mission time in the CMC clock and 
it is not required. 

SC Okay, great. Thank you. 

SC Hey, Don, is our comm going to be good 

enough the way we're going here now for you to get the marks 
or are we going to — can we count on recording a mode 4 2. 

CAPCOM You better record onboard as well. 

SC Okay. You'll start the tape recorders. 



APOLLO 16 MISSION COMMENTARY 4/18/72 CST 12:10 GET 48:16 150/2 



SC Is that affirmative? 

CAPCOM Affirmative. Call us when you're ready. 

SC You want us to do that. Okay. We'll do 

that, thank you. Okay, if at any time, the voice quality 
goes down, our procedures, as I understand described, will — 
I'll knock off or I'll take Charlie's place here and I'll 
knock off the observation and go to recording and other than 
that, Charlie will be doing all the things that I was going 
to be doing. But, if you want us to record the (garble) at 
the same time, just give us a call. 

CAPCOM Roger. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/18/72 CS T 12:30P GET 48:36 151/1 



us 



an d 



CAP COM 
SC 

CAP COM 
S C 

in position and 
CAPCOM 



16, Houston. Voice check. 
Loud and clear there, Pete. 

Roger. You all were so quiet you scared 

Okay Pete. I just got the ALFMED on, 
we're going to see if we can see anything 
Okay . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/18/72 CST 12:40 GET 48:46 152/1 



s c 


Hons t" on 16- 








OV a 17 T'tti^ q o i:^ n S "in IS m"fnnJ"pc; 

UlVCiy* -i- VC OCCLl -/ -1- llL^LlULCOa 


CAPCOM 


5 in 15 minutes, Charlie? 


SC 


That ' s af f i rm. 


CAPCOM 


Okay stand by a minute, we'll look 


at that. 




S C 


Okay, Don. We were just about ready to 


call this thing 


off and try it another day and then it looked 



like Charlie was f arting to see them at a pretty fair rate. 
That 5 for 15 minutes was like 4 in the last minute or two. 
And John has seen one. I have not seen any yet. But sounds 
like Charlie is going to be able to see these and I'm going 
to go ahead and take the photographs and get all set and 
wait for your answer. 

CAPCOM Okay we've been advised that we do want to 

go ahead with the ALFMED experiment. 

SC Okay. It's at work. I'll tell you 

when we're ready to start timing. 

CAPCOM All righty, 

SC Okay Pete, they seem to come in clusters. 

You get 1 or 2 right after — and then nothing for awhile. 
CAPCOM Roger. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/18772 12:52 CST 4 8:58 GET 153/1 



SC Hey, Don, can you help me (garble). (Heavy 

background noise.) 

GAPCOM 16, that was so garbled we didn't copy could 

you commence to say it again? 

SC Did you copy that, Don? 

CAPCOM Negative, Ken. We were in ~ had a lot of 

that background noise and we didn't get any of that. 
SC Houston, Casper. 

CAPCOM Casper go ahead. 

SC Did you copy comments about the film? 

CAPCOM Negative we did not. We had too much back 

ground noise. Can you say again? 

SC Okay, I guess I'll write it down. I think 

that's faster after all. 

CAPCOM Okay. 

SC Okay Houston, we're ready to start. Could 

you make sure the tape recorder is running? 

CAPCOM All right. Ken, it's been running a while. 

We're going to rewind it and I'll get it back to you in a minute. 
In the meantime, Ken, if you've got comments, we'll take them on 
air to ground. 

SC Does that mean you want us to go ahead and 

start? 

CAPCOM Roger. 
S C 

s t an db y ? 

GAPCOM My comment is go ahead and start. 

SC Okay, Don, we're running in 49:10. 

CAPCOM Okay. 

SC MARK. Okay, a bright dot in the - in my 

right eye in the upper left center. 
CAPCOM Okay. 

SC MARK. One dot in the left eye upper left 

b r i gh t cent e r . 

SC MARK, MARK. The first one was a fuzzy dot 

in the right eye. The left eye - the second one was a bright 
dot in the right eye, lower left center. 

SC You copying Houston? 

CAPCOM I told you we're copied. DS E is now running 

SC Okay. MARK light streak - white streak 

in the right eye upper center, moving from bottom to up - top. 

MARK faint left - faint white dot in the left eye - extreme 

le f t . 

SC (Garble) that was a bright dot (HEAVY BACK- 

GROUND NOISE) . 



Say it over again. Was that rog 



er or 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/18/72 CST 1:10 GET 49:16 154/1 



SC Mark. (Garbled and heavy background noise.) 

PAD This is Apollo Control. Apollo 16 crew 

now conducting the Apollo light flash experiment, using the 
blinders. The Apollo ALFMED, Apollo light flash in moving emulsion 
dei:ector, is the astronyms ALFMED. At 1:30 today, central standard 
time in the small briefing room in the Apollo News Center MSG, 
there will be a briefing by a panal of several scientist. The 
tojjic is "Magnetic Enigmas of the Moon". Spacecraft distance 
at the present time, 160,746 nautical miles. Velocity 3,307 feet 
per second. At ^ : 1 7 , still up live air-to-ground, this is 
Apollo Control. 

SC Mark, right eye center, just a bright flash. 

SC Mark, a bright flash in the lower center of 

the right eye. 

SC Mark, little light dim streak in the lower 

right eye, lower left. 

SC Mark, lower left eye, in the out board and 

it was a bright flash. Looked like a streak probably going from 
right to left. 

SC Mark, bright dot, upper right outboard, 

right eye. 

SPEAKER Hello. Hello. Hello. Hello. Hello. 

(CTOssup in communications. We have left out the Spanish portion 
of th is t ap e . ) 



END OF TAPE 



APOLLO L6 MISSION COMMENTARY i^JlBJll CST 1:21 GET 49 :2 7 155/1 



SC Mark dot — bright dot in the upper right 

eye , cente r . 

SC Okay, Houston, I've also added some very 

subtle things that are just very -- looks like little dim 
flashes that I haven't been calling. They're just so subtle, 
I've been afraid to call over a definite mark. 

CAPCOM Okay, Charlie, we copied that. 

SC Mark. Upper right eye going from left 

to right. Light flash. 

CAPCOM Okay, Charlie, if you see anymore of the 

subtle marks, how about calling them and just call them a 
subtle mark. We'd like to record that information. 

SC Okay. 

I'AO This is Apollo Control. The mysterious 

comments and singing and frequent repetition of hello, hello, 
on the Public Affairs broadcast line a few moments ago has 
been identified by the network controller as a telephone 
company technician in Spain who inte rve rtan tly somehow got 
patched over onto the network line coming from the tracking 
station on the air/ground circuit. He has been isolated 
electronically that is; and hopefully, we shouldn't have any- 
more of that sort of thing. Continuing with the ALFMED experi- 
ment at 49:31. 

SC Mark, right dot, right eye, center, upper. 

SC (garble) Heavy background. 

CAPCOM 16, you're very weak. 

SC Mark, subtle 1, very subtle on the left 

eye, outboard upper, 

SC Mark. Flashes on the lower right eye. 

Sort of a dist ant light flash. 

SC Mark. Upper center of upper right eye 

(garble) by light flash. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h/lQJH CST 1:31 GET 49 : 37 156/1 



SC Mark. Faint dot lower left eye inboard. 

SC Mark. Flash, a light streak in the left eye 

starting at the center and going to the bottom right from 
upper — from center down to right in movement. 

SC Mark. Right side center right eye. 

SC Mark. Left eye, sort of subtle, towards 

inboard center, a white flash. 

SC Mark. Subtle dot -- white dot -- in the 

inboard center of the right eye. Mark again. That was the 
left eye. That wa', a center upper white, dot left eye, both 
of those were in the left eye. 

SC Mark. Upper right -- part of right eye, 

l:.gh t flash . 

SC Mark. Subtle white flash, inboard upper 

right eye. Inboard corner, that was. Mark. Same spot. A 
white streak. 

SC Mark. Right eye center, white dot. 

SC Mark. White dot center — center right 

lower of the left eye. 

SC Same here. All of the same time 

Charlie did. Only mine were only in the lower left side 
(garble) . 

SC Mark flash across the bottom of the left, 

eye high speed. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kjY^lll CST 1:42P GET 49:48 157/1 



sc 


Hey, 


Don. Can you tell us how we're 


doing on time? 






CAP COM 


Standby, I'll let you know. 


CAPCOM 


You've got about 10 more minutes. 


S C 


Ok ay , 


thank you. 


S C 


Don , 


this thing was made for about a 


size 6-1/4 or someth 


Ing head. It's really tight on me. 


CAP COM 


Okay , 


John. We'll make a note of that. 


S C 


I'm not complaining, it's just a little 


tight. 






CAPCOM 


Roge r 




S C 


Mark . 


Lights flashing down to the right 


t h e re . 






S C 


Mark . 


A dull fuzzy spot in the outboard 


theater of the left 


eye. 




S C 


Mark . 


Flash in the center of the left 


eye (garble) 






SC 


Mark . 


White dot, outboard, right eye. 


center. 






S C 


Mark . 


Small flash in the fore center 


of the right eye. 







END OF TAPE 



APOLLO 16 MISSION COMMENTARY hJlSJll GST 1:52 GET 49:58 158/1 



SC Mark. Three tiny mites in the lower center 

left eye. Mark. Streak across the lower, left of the left eye, 
on the inward side. The light is going from left to right to left. 
Mark. Two little dots, flashes in the upper right center of the 
right eye, left eye. 

SC Mark. Low flash in the upper right center of 

the -- (Garbled) 

SC Mark. My last mark was an upper center right 

ey e , low f 1 ash . 

SC Mark, low flash in the (garble) -- right eye. 

SC Mark. Mark, They were, the first one was 

right eye. A straight break from inboard center to the upper 
right. Left one was a streak, crystal shape, a pencil line. Left 
eje from center to upper right- 

SC Mark. Very subtle flash in the light, right 

eye, upper right. Mark. Another subtle one just below that, 
cemter right, right eye. 

SC Mark. Left eye, a streak starting in the 

center. Mark. Right eye, dot, center. The left eye was a streak 
starting in the center going out to the right. It increased in 
size as it went from right to left. 

SC Mark. Subtle dot, outboard side, center left 

e> e . 

SC Mark. Mark. Faint dot in the right eye center 

upper, and the inboard side was a white dot in the left eye with 
the second one it was in the inboard side center. 

SC Mark. Dot right eye, outboard center. 

SC Mark. Streak in the lower left of left eye, 

and moving from top to bottom. 

SC Mark. Simultaneous white dot. Right in left 

eye. Left one was in the upper right inboard center. Right one 
W£ls in the inboard bottom left. 



END OF TAPE 



APOLLO L6 MLSSION COMMENTARY 4/18/72 2:03 CST 50:09GET 159/1 



SC Mark. Dull flash in the right eye upper, 

inb oar d . 

SC Houston, 16. How's the time? 

CAPCOM 16, we figured the time is about up on the 

ALFMED experiment. We'd like to know if the motor is stopped. 
SC No,ltisstill running. 

SC MARK. A streak in the lower left side of 

the left eye moving dov/n. 

CAPCOM Okay, Ken. Keep going until the motor stops. 

SC Okay. MARK thin white dot upper right, 

inboard left eye. 

SC MARK. Lighting flash type phenomena lower 

right inboard left eye. 

SC MARK. White dot center left eye. MARK, 

white dot, left eye, outboard, center. 

CAPCOM MARK. White dot left eye center. 

SC MARK. Right eye center inboard, a white dot. 

CAPCOM Okay, Ken, we've got all the ALFMED data 

we need. We want you to give us a MARK when you shut the 
mot or off. 

SC Okay, Pete, MARK. ALFMED is off. 

CAPCOM Roger. 

CAPCOM 16, Houston. Whenever you can copy, I've got 

some words on the IMU problem that we had. Also some — an 
entry to the GN C checklist. 

SC Okay, Don. Standby until we clean up all this 

mess (garb le) . 

CAPCOM Roger. 

SC But you're cutting out pretty bad, Don. 

CAPCOM Okay. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY CST 2:17 GET 50:22 160/1 



CAPCOM 16, the PI (garble) on the ALFMED expe riment 

that we got about 70 counts and he's very happy with the results, 
and he wants you to verify that the clutch is in the stow 
p OS Ition . 

SC That's verified. 

CAPCOM Roger, thank you. 

SC Okay, great. Those things are really 

something, Don. There were a couple of the phenomena that 
I had seen previously that I didn't see today, but there were 
some other ones todpy that were different too. The phenomenon -- 
the flashes leave no afterglow and they're just instantaneous. 
All the colors are white, were all we saw. We saw no colors 
at all; neither John nor I. Everyone we saw was white. 

SC Okay, Don, I'm ready to copy some things 

now . 

CAPCOM (garble) Houston, before we get into 

copying stuff, could we confirm what Charlie said about that 
clutch. Now this might -- I think we tracked before and as 
soon as we went to the mid-position on the clutch, why, you 
caa hear the plates come down. So, we went ahead and rapped 
it once, anyhow, just to be sure but I didn't hear anything 
jiggle and we cycled it to operate and then back to stow and 
it all felt normal and the plate travel sounded proper. 

CAPCOM Okay, we copied that. Ken. 

SC On the -- 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/18/72 CST 2 : 2 7P GET 50:33 161/1 



SC Okay, and I guess my only comment on 

ALFMED is that 1 think those light flashes are made by the 
same guy that makes the Emperors clothes. 

CAPCOM That makes what? 

SC I think they're made by the same guy 

that makes the Emperor's clothes. 

CAPCOM Roger. Understand. 

SC Hey Don, I'm standing by the copywriter - 

the words you got about P52's and G £:N and any of those other 
subjects pertaining to our operation. 

CAPCOM Okay, Ken. We'll talk about the platform 

problem first, and then back up and talk about the original 
data that we passed up because there are some small corrections 
to that. I'll try to break it down into about 4 shovel fulls 
here for you, cause it's a fairly big mouthfull if we try 
to do it all at once. 

SC Okay. You've got some stuff that I 

probably should copy on. 

CAPCOM Yes, I will have some items for you to 

copy. 

CAPCOM Hold off a minute 16. We're coming up 

on an OMNI switch. 

SC Roger. 

CAPCOM Okay, 16. How do you read now? 

SC Loud and clear. 

CAPCOM Okay, we'll start here on this thing. 

First of all the problem occurs, apparently, in CSM 117 
when the TVC relay changes state either going from enable 
to disable or from disable to enable, and it causes an 
electric glitch that makes the CDU's go to 90 degrees, 
in particular, the YAW CDU, and therefore the CMC thinks 
it's in glmbal lock and goes into a course aline mode. 
Some of the cases that could cause this, for example, are 
when you go to - when you select manual optics, you have 
the TVC relay enable and then if you go from manual to 
AUTO or if you hit the 0 optics switch with manual optics 
selected, or if you go from P52 to POO with the manual 
optics selected, you will reset the TVC relay and that can 
cause the glitch. This is apparently what happened last 
n i gh t . 

SC Okay, is it important for me to copy 

those things that cause this or are you going to give me a 
way to prevent it? 

CAPCOM Negative. You don't have to copy those. 

That's just background. Now we're going to talk about what 
you can do here in P52's and maybe subsequently for the 
LOI's and P40's. There are 2 ways to approach the P52. 
There's a quick and dirty way which is simply to go to 
SCS control, and because with SCS control the TVC relay is 
not enabled . And by doing that you don't run the risk of 



APOLLO 16 MISSION COMMENTARY h I \^ j 11 CST 2 : 2 7P GET 50:33 161/2 



CAPCOM generating this GLITCH. It's not the 

way, however, that the guys are recommending because they 
have a procedure that they think will handle not only the 
P52, but the burn cases and they would like you to get that 
procedure, and you're going to have to copy that one. 

SC Okay. How about running down that list 

of things that causes the TVC enable to change state again. 
Let me copy those this time. 

CAPCOM Okay, will do, and these cases are not 

all inclusive, these are just some examples that we can 
bring up to you. First of all the TVC relay is enabled when 
you select manual optics. It is then, subsequently disabled 
if you go from manual to AUTO, or if you go to 0 the optics 
with manual selected, or if you go with go from manual 
to optics selected, if you go from P52 to POO. But these 
are probably not the only cases, they're probably just some 
examples that we know of. 

SC Okay. 

CAPCOM Another important point. Ken is that 

it changes state during the TVC gimbal drive check. 

SC Yes, that's what I was afraid of. Okay. 

CAPCOM Okay. We're going to - this next pro- 

cisdure that I have to read up to you is probably going to 
be the one that we'll use to try to get around that. And 
also, we'd like you to use it in the P52's because it allows 
us to monitor for the glitch, and at the same time prevents 
the glitch from bringing your platform down. 

SC Okay. 

CAPCOM Okay, if you're ready to copy. I'll 

read you up the procedures. 

SC Copy this? Okay, I'll just copy this 

on a scratch pad and we'll put it in the appropriate place 
if that sounds reasonable. 

CAPCOM That sounds real good. Number 1 we 

want you to key verb 48 enter and load noun 46, 
register 1. The first digit should be loaded as a 3. The 
rest of the numbers can be left as they are. 

SC Okay, why don't you read on at about 

that pace, Don, and I'll just copy and then I'll read it 
back to you. 

CAPCOM Okay, the second step is key verb 25 

noun 07 enter 75, enter 1, enter 1 enter. That sets the 
average g flag, but does not turn average g on. The com- 
bination of those 2 will prevent the CMC from going into 
course aline. After you've done that you can select P52 
and use your normal alinement procedures, and when you've 
completed the P52 to terminate this EMP , we'll have your 
key verb 48 enter load noun 46 register 1 with its original 
value whether that was 2 or 1 in the first digit. Step 2 



APOLLO 16 MISSION COMMENTARY 4/18/72 CST 2:27V GET 50:33 161/3 

CAPCOM will have you a key VERB 25 NOUN 07 enter. 

75 enter 1 enter, enter. That will then return you to the 
correct DAP and also reset the average G flight. 

SC Okay that was in VERB 25 NOUN on 75 enter 

1 enter, and then 0 enter or 1 enter? 

CAPCOM 0 enter. 

SC Okay. 

CAPCOM Okay that's the whole procedure. 

SC Okay, let me look it over here for a 

second. At first glance the first thing I see here looks 
like (garble) 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/18/72 CST 2:38 GET 50:44 162/1 



16, we're switching OMNI's, hold off a bit. 
Okay, 16. How do you read now? 
Loud end clear. 

Okay. We lost com there temporarily. You can 
read on that any time your ready. 

Okay. Did you get my questions about the 

Negative, but we have our caution note that 
RB 46 in there while all this EMP is in to 
a DAP actually comlr. g ca. 
Okay, thank you. 

Okay, what you would do then is, we're going 
in average G in order to prevent course alining 



CAP COM 
CAP COM 
SC 

CAP COM 
gc ahead with the 
S C 

VERB 46? 

CAP COM 
says do not key VI 
p re vent S AP , S atu , 

SC 

SC 

to set Saturn DAP 

the event middle gimbal picks up spurious signals and we do this 
and we set VERB 48 with a NOUN 46 digit A is set to a 3 and we 
set the average G flag with a VERB 25 NOUN on 7, address 75 bit 
1 set it to the 1, that's what you'd call P52 normally, and 
if the glitch occurs, it'll be ignored. I assume if the glitch 
occurs some time while we are in the process of taking marks, 
some kind of garbage out 
from what you gave me on 
would not run across TVC 
the completion of number 



of P52, but it should be 
the list up at the top, 
and Able during that 
52 we go back to a VERB 48 

the 



th a t we ge t 
obvious and 
normally we 
period. At 

and now we take NOUN back to original values, then we reset 
average G flag by taking channel 75 bit I to a zero, using 
VERB 25 NOUN 7 and the restrictions on this EMP is that we 
will not use VERB 46 at any time while this is punched in. 
CAPCOM That's affirmative Ken. 

SC Okay, do you have words on how we handle 

P4Q? 

CAPCOM Okay, Ken, in the P40 is what we're think- 

about. And we haven't completely decided now is we prob- 
use this EMP before and after the TVC gimbal check, there 



th e 

in g 
ab ly 
w e 
w e 



i f 



may move the TVC check 
have plenty of time to 

Ok ay , 
Okay , 
copy . 
Okay, 
Ok ay , 



gimbal earlier or before the burn so th 
get this thing in and out. 
that sounds like a good plan, 
now we got the last shovel full here 



I ve got my bucket out. 



SC 

CAPCOM 
you are ready to 
SC 

CAPCOM 
alignment, we'll do 
VE:51B 2 3 NOUN 2 0 enter 
the check list, G 7-1 and 
S C Ok ay , 

we're going to release the platform by setting NOUN 20 to zeros 
and do that with the VERB 23 NOUN 20 enter, enter, then we 
release the platform with the VERB 40 enter and then we go 
through page D 7-1 and get a rapid alignment to the GDC. 1 
assume what happened to us was the glitch in the middle gimbal 



if you should loose the platform 
the same thing we tried last night, a 
enter VERB 40 enter and then go to 
do the rapid IMU realign. 
Don. If we tumble the thing again 



APOLLO 16 MISSION COMMENTARY l^Jl^Jll CST 2:38 GET 50:44 162/2 



SC If I understood your conversation, it's 

possible to have a glitch in one of the other gimbals. Is that 
corre ct? 

CAPCOM That's correct. That will not, however, get 

you into the problem that causes platform to go into course align. 
Also, we recognize that while this EMP is in, you shouldn't have 
the problem of loosing the platform alignment. 

SC Okay. If we get a glitch in one of the other 

axies and we have the controls enabled, I assume one of the things 
we would see would be some unusual thruster activity. 

CAPCOM That's affirmative and in that case all you 

need — 

SC ... proper correction. Well, I'm trying to figure 

out what we'll do if we have a, say were in attitude hold. 
If we have that glitch occur right now and with our engines 
disabled I don't think there would be any way I'd see it 
till I went to use some auto optics or something. And if we 
were in an attitude hold, it appears to me that I would see a 
DAP that would appear to be unstable in the axis that it was 
going for or at least take off for some place other than where 
it is. And we would go S CS momentarily and the proper responses 
would be a VERB 40 enter and allow the CMC to zero and recount the 
IMU CDU Is that correct? 

CAPCOM Right oh. 

SC The TVC enable that we're talking about 

is used for the gimbal drive test, now that's a function only 
of the gimbal drive test and not a function of the setting of 
the trims in P40. Is that correct? 

CAPCOM Yeah, that affirmative. 

SC Okay, for P40 then, it would be something 
like we would go out and we'll get a gimbal drive check to 
you folks early, then we'll turn the gimbals off probably and 
I'm just theorizing what I'm 

CAPCOM OMNI Switch coming up, 16 standby. Standby 

16, we're switching OMNl's. 

SC Roger, 

SC Gimbal check to verify all the gimbals are 

properly hooked up. Then we would bypass the flashing 202 enter 
and we'd just let the gimbals go to trim and everything else 
would be done nominally. 

CAPCOM Ken, I think your general impression is 

right. I guess we're not yet ready to commit ourselves to a 
set of procedures. We're going to have Stu take a look at it 
in the simulator here and we'll come up to you later with a 
detailed procedures specifically for the burn. 

SC Ro g . I understand that, I just wanted to 

make sure I had a general understanding if we had to do some 
original thinking. 



APOLLO 16 MISSION COMMENTARY hjl^jll CST 2:38 GET 50:44 162/3 



CAPCOM Rogj John, I think we concur with what you 

said so far . 

SC Okay, and the other thing just out of curi- 

osity if the guys in the back room, after they get through getting 
all the important things squared away, that they could kinda 
think some more about their list of things that causes enabled 
relay to change state. I'll compile a list of those things 
in case we come across something later on that we hadn't 
th 0 ugh t ab out . 

CAPCOM Okay, Ken, we'll do chat. Oh, yeah, and 

there is one last note here, that prior to your P52's, it 
would be a good idea to align the GDC just prior to going in. 

SC Yes, sir, I don't think I'll let that guy 

get very far away from us. 

CAPCOM Roger. 

CAPCOM And Ken, I've got an update to the GNC check 

list on page 9-4 any time you are ready to copy. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 2:51CST 50:56GET 163/1 



S C 

CAPCOM 



GARBLE. 

An d Ken 



list 



I've got an update to the GN C check- 



copy 



re aa 



on page 9-4 anytime you are ready to 
SC Okay, pencil in hand. 

CAPCOM Okay, on page 9-4, line 

0.7 should read 76747. Line 11 should 
line 13 77307. 

SC Okay I'm on page G 

On line 7 I replace 77426 with 76747. 
00214 with 77552. On line 12 I replace 
13 I replace 77446 with 77307. 

CAPCOM That's correct Ken. And we've got 

some notes on this jeton monitor EMP we'd like to do a 



0.7 replacement for line 
77552, Line 12 77756 



9-4 reading down column A. 
On line 11 I replace 
77714 with 77756 . Line 



Ken , 
ch e ck 



here 



SC 

CAPCOM 
like to add 
minus 09000 



up the procedure for that 



the flight plan we would 
checkout attitude, NOUN 

NOUN 79 plus 00050. 
the jeton monitor loads 



78 



an d 



on it at 5425 and I can read you 
anytime you are ready to copy. 

Go ahead. 
Okay at 5425 in 
P20 option 5, in the LM 
minus 03000 plus 25500. 
NOUN 70 plus 00047. We will uplink 

when the P20 maneuver is complete you can do a VERB 74 at 
ENTER. And the P20 attitude that we've selected will be the 
attitude that you are already in, so there is actually not a 
maneuver involved here. 

SC Okay, would you say when maneuver complete, 

does that mean that you would want us to maneuver to the LM 

using P20, or are you going to let us go to 
I'll call it up in bypass maneuver, is that 



call 



you 



th en 



VERB 



16, 



checkout attitude 
VERB 49 for that, 
correct? 

CAPCOM 

SC 

P20 and 
CAPCOM 
SC 

w an t the 

CAPCOM 
s tan db y . 
CAPCOM 
S C 

CAPCOM 
that's 5600 we want 
S C 

going to be 
CAPCOM 
SC 

de adb an d , is 

CAPCOM 

CAPCOM 
You actually 



You can use a VERB 49 for that Ken. 
Okay, understand VERB 49 and then will 
command the same attitude OMNI. 
That's affirmative. 

I've got the 50:18 the second time. Then 
74 ENTER. 

Coming up on an OMNI switch. 



Th at ' s af f i rm. 



sett ing 



16, how do you read me? 
Loud and clear now. 
Okay, the only other 
you to terminate the 
Okay can you tell me 
in th ere ? 

Stand off. Okay Kid, 



thing is at 56 hours 
jeton monitor EMP. 
what deadband you are 



that 



Okay, you re setting 
tr ue ? 

That's (garbled) 
Ken, on a noun 70 I read 
don't need that plus, that's an 



it'll be 
me in the 



a 1 degree deadband. 
MP at 1 degree 



you a 
Oct al 



plus 000 
numb er. 



47 



APOLLO 16 MISSION COMMENTARY h /!& / 11 2:51 CST 50:56 GET 163/2 



SC Okay, it's not clear to me, if we are going 

to exceed this or not, we normally would not. Do you want to 
cry letting us drift out of the deadband and see if the monitor 
w rk s ? 

CAPCOM Negative, that's not the intent. I think 

they just want to get the program in and look at it. 

SC Okay, well, sometime before we get through, 

would you ask them if they would object to letting us see if 
that thing triggers the same response as we're used to. 

CAPCOM Okay, Ken, we'd Like to think that over. 

We'll get back to you on that. 

SC Okay, fine. Thank you, 

CAPCOM Okay, now I still got this dump that we had 

sj.nce about 24 hours ago on changing the angle on that sun wheel 
and if you have that out now, we can clean that up; otherwise 
I'll hold it a while. 

SC I don't have it out, but why don't you tell 

me; what it is. I think I know what you are talking about. 
Ill's due to the REFSMMAT angle on there being changed. 

CAPCOM That's affirmative and we inked 27 degrees on 

it and we should have written in 37 degrees. 

SC Okay, it turns out we're at (garbled) at 

2 7 and it should be 37. 

CAPCOM That's affirmative. 

SC Okay, thank you. Glad you remembered that, 

CAPCOM Roger. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kJlZjll CST 3:01 GET 51:07 164/1 



that 



th at , 



S C 

2 7, it 
CAP COM 

SC 



s ho uld 



Okay, it turns out that we're at the (garble) 
be 37. 
That' s a birdie . 

Okay, thank you. I'm glad you remembered 



CAPCOM 
CAPCOM 
S C 
SC 

CAPCOM 

SC 

CAPCOM 
S C 

CAPCOM 
answer to that 
EMP to kind of 



Ro g e r . 

16, terminate battery 
Ok ay . 

Okay, it's inward. 
Ro ge r . 

(garble). About one 
( garb le ) . 
Say that 



BRAVO charge 



in a million 



again , Pete? 
16, I guess we really don' 
That's one of the reasons we 
a watch point and see if it is 



quently or infrequently. 

CAPCOM (garble) 16. 

SC Okay, Don, we're going to 

punch through this P52 and we'll start with a 



You cut out. 
t know the 
want to this 
occuring fre- 



h e re an d you 
get it right 

CAP COM 

SC 

CAPCOM 
ahe ad . 

S C 

was of this thing 
CAPCOM 



go ahead and 
little procedure 



through and make sure we 



might kind of watch us 
the first time. 

Will do. 

Okay, Houston, your watching us right? 
That's affirmative we're watching you can go 

Okay, and what did you say probability 
h appen in g . 

I think we don't know the answer to that 



if that glitch is occuring frequently or 
again, we really don't know. 



John, that's why we want to load this software program so we 
can monitor to see 
it may never occur 
SC 

goin g to call P5 2 . 
CAPCOM 
CAPCOM 
SC 



Unders tand, 



Okay I've got it in I' 



m 



Ro g e r . 

Have you got the GDC lined 
Oh yes, you better believe 



up 

i t , 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/18/72 3:11 CST 51:17 GET 165/1 



SC Houston, how do you like those angles? 

CAPCOM Just a moment. 

CAPCOM They look real good, 16. 

SC Do you want us to torque some that small? 

CAPCOM Go ahead, torque them. 

SC Okay,we'lldoitatl7mlnutes-I 

guess that's 18, excuse me. 

CAPCOM Understand 18 minutes. 

SC Okay, would you like for me to return 

it to zero with t switch in manual this time just to see 
it we get that glitch? 

CAPCOM { garble) . 

SC Going to zero. Mark. 

CAPCOM 16, we didn't see any glitch. There, 
we're coming up on an OMNI switch. 

CAPCOM 16, that EMP that we loaded to protect 
the platform, we'll refer to it as EMP 509. 

SC Okay, 509, sounds familiar. 

CAPCOM Does it? 

END OF TAPE 



APOLLO 16 MISSION COMMENTARY h J IS J 12 CST 3:24 GET 51:30 166/1 



CAPCOM 16, you and set we've got up- 

link for you, and I've got I've got news if your interested. 

SC Okay here's POO and ACCEPT and yes we're 

inte rested. 

CAPCOM Okay, former president Lyndon Johnson is 

resting comfortably after he was hospitalized again following 
an increase in his heart rate. He's hospitalized in San 
Antonio. Vice President Agnew speaking here in Houston has 
asked the nation super market executives to hold the line on 
prices. If prices for food continue to soar Mr. Agnew hinted 
at mandatory federal control. President Nixon added a stop 
during his scheduled trip to Moscow. Prior to returning to 
home he will stop off in Poland to discuss Polish American 
relations. The Moscow trip in late May is still on despite 
some fears that recent development in the Vietnamese con- 
flict could affect the Presidents visit to the Soviet Union. 
State news, the Texas governors race is still a hot item, but 
no word yet from John Connally who said he may speak out on 
the wide open race. Congressman Bob Eckhardt says the U.S. 
needs at least 3 large super ocean ports to keep in contention 
with the world market. He says the Galveston Houston area is 
a prime super port site. And in sports news the Astros cap- 
tured their first victory of the year with a 7-2 win over the 
L.A. Giants and some scores on the other games in the American 
League, Cleveland 4, Boston 0; Baltimore 4, New York 0; in the 
National League St. Louis 3, Philadelphia 4; Los Angeles 8, 
Atlanta 3. The Boston Marathon run yesterday on patriots 
day in Bean Town was won by 25 year old Engineering student 
from Finland. Strangely enough they have omitted his name. 
A 33 year old Long Island New York woman Nina Kousick won the 
special ladies division. The Los Angeles Lakers and the 
Milwaukee Bucks are tied 2-2 in the Western division playoffs 
in the NBA. 

SC Charlie wants to know consolidated Jack 

Pine is doing . 

CAPCOM Was that consolidated Jack Pot? 

SC Jack Pine. 

CAPCOM Roger. 

SC They lost 3 or 4 points yesterday. 

CAPCOM Rog. Charlie I guess I haven't got those 

figures handy we'll see what we can do. 

SC If you can find out Pete I have been 

crying for 10 years. 

CAPCOM Okay, Charlie and you can have your 

computer back, 16. 

SC That compensation you guys put up there 

really fixed that baby. 

CAPCOM Yes, seems to have. 

SC (garble) Ken marks. 



AFOLLO 16 MISSION COMMENTARY h J IQ / 12 CST 3:24 GET 51:30 166/2 



S C 
I 



So w e ■ re going 
CAP COM 
SC 

CAP COM 
CAP COM 

s c 

I commented about 
CAPCOM 

SC 

It look? 

CAPCOM 

CAPCOM 
get it, they'll 

SC 

CAPCOM 
comments on the 
S C 



(garble) 
( garb le) . 

We've got 



an 



Houston, you 



so we can pick up some (garble) 

s t an d by. 



OMNI 
read 

Your pretty weak. 
16, can you read now 
Yes, I read you now. 
the Skylab food. 
Negative. 



switch 16 
Casper? 



Did you copy when 



Pete, I'm back on the biomed, how does 



their j us t 
11 let you 



now starting to 
know in a minute 



Stand by one 
Hey, Charlie 
take a look at I 
(Garble) . 

Okay, you want to go ahead with you 
Skylab food, now. 

The comment I made 



behind the 
food off until 
now and try to 



Don, was that because we're 



timeline, here we thought we would put the Skylab 
t on i gh t , an d we' 
get caught up a 



re just going 
little bit. 



to eat snacks 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/18/72 GET 51:42 CST 3:35 PM CST MC/167/1 



CAP COM 

S C 

CAP COM 
on this next 
now . Do you 
other — 

SC 

CAPCOM 
And Ken, you 
the MSFN key 

SC 

CAPCOM 
SC 

I went to hi 



BRAVO, and g 
work — it 1 
I'm t ry in g . 

CAPCOM 

S C 

CAPCOM 
to go to the 
at the angle 

SC 

Ch ar lie . Do 

CAP COM 
SC 

CAP COM 
CAPCOM 
came ra , an d 
point in the 



Okay, we concur with that Ken. 
Rog. 

16, we would like to get the high gain up 
rev, you're about 10 minutes away from it 
think you can make that? If not, we can wait an- 

We'll get it to you- 

Okay, it's pitch minus 40 and yaw plus 90. 
can go on your — in your checklist there down to 
any time you are ready. 

Houston, 16, over. 
Go ah e ad , 16 , 
Okay, Pete, I hit a 
gh gain too soon, and we're 
ive me a mark. The high gain just didn't seem to 
ooks like I ought to be able to get high gain now 



command reset there, 
operating now in OMNI 



Negative, you won't be able to get it yet. 

Okay. Okay, you're on OMNI Charlie now. 

16, we'll handle the OMNIs until we're ready 
high gain. We'll tell you when to go to high gain 
s we just gave you- 

Okay, we're all set, and you're in OMNI 
you want me to reconfigure? 

Come back to BRAVO. 

Back to BRAVO. You're in OMNI BRAVO. 
Okay, thank you John. 

16, would you go ahead and start the pan 
mapping camera film cycling procedures down to the 
checklist where it calls for a MSFN key. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hjl^lll 15:40 CST 51:46 GET 168/1 

SC Houston, how much time until we get the 
high gain? 

CAPCOM A couple of minutes Charlie. 

S C Ok ay . 

END OF TAPE 



APOLLO 16 MISSION COMMENTARY h/lBjll CST 15:47 GET 51:53 MC-169/1 



CAP COM 
CAPCOM 
SC 

NARROW on the high 
CAPCOM 
film cycling. 
SC 

s t an d by. 
CAPCOM 
SC 



Okay, 16, you can bring up the high gain, 



1 6 , ring up 
Okay, there 



to high gain now, please, 
you go, you got REACQ and 



the 



on 



gam. 
Ro ge r , 

Okay . 

Roger. 
Ok ay , 



16, we're ready to precede with 
Okay, the mapping camera is coming 

you ready for mapping camera pan 



camera operations. 
CAPCOM 

a couple of temperatures. 
SC Okay, 



Stand by one. 16, stand by we're checking 
Okay you can proceed 16. 
mapping camera is coming on. And 
the pan camera self-test has been hit. Okay the pan camera 
mode barber pole has gone back to gray, that took about 40 
s e con ds . 

Ro ge r . 

Mapping camera is off. Houston, do you 



copy , 



CAPCOM 
SC 

Cas p e r , 
CAPCOM 
SC 



Through loud and clear, Casper, go ahead. 
Okay, the next item here is to take the 



mapping camera to stand by mode and I assume I should do that 



before I turn 
CAPCOM 



the spec power OFF. 

That's affirmative, 16. 



END OF TAPE 



AFOLLO 16 MISSION COMMENTARY h/lSjll CST 15:57 GET 52:03 170/1 



SC Roger 30 

CAPCOM Alright, 
cf.mera to the standby mode we 
self test to heaters. 

S C Ok ay , y o u ' ve 

in standby I'm about to turn the 
Went me to hold it. 

CAPCOM 



of 60. 

Casper after you turn the mapping 
V7ant you to add pan camera 



got heaters now and we're 
SMAC power off unless you 



hi gh 



call 



CAPCOM 
and the power 
5 8 hours, b ut 

SC 

CAPCOM 
SC 

and stop PTC 
CAPCOM 



Le ave 
Ok ay . 
16 , go 



Leave that 



OMNI BRAVO, 



You c an s t ow 



power 
the 



Houston, Casper. 
Go ahead, Casper. 

Okay, after the film cycling you normally 
SMAC power off and you asked that we hold 
us to complete the rest of that power down 



it on , Casper. 

SC 

CAPCOM 
gain . 
SC 

CAPCOM 

SC 

for t aking th e 
there, do you want 

or do you want us to just stop there 
later or what did you have in mind. 

We want to leave the heaters on for awhile 
on then we'll pick it up again later at about 
'11 call you. 

Okay, we'll leave it in your care. 
Ro ge r . 

And if your ready Houston we'll go ahead 
over to the UVS (garble) . 
Ok ay . 



an d 



you'll pick it up 



w e 



an d go 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k I \^ 1 11 16:05 CST 52:11 GET 171/1 

SC UVS (garble) 

CAP COM Okay. 

SC It's surely a shame to kill a PTC that looks 
as nice as this one. 

CAPCOM Yes, it does. 

CAPCOM Casper, do you want to try killing this 

roll at 208 which is your next roll attitude? 

SC We're with you. 

END OF TAPE 



AOLLO 16 MISSION COMMENTARY 4/18/72 CST 16:11 GET 52:17 MC-172/1 



PAG This is Apollo Control 52 hours 17 minutes 

ground elapsed time. Apollo 16 now being maneuvered into a 
high gain antenna attitude leaving the passive thermal control 
after all night and most of the day. Midcourse correction 3 
will not be performed and it's likely that midcourse A will 
not be either. In as much the present calculations show that 
correction would about 1.4 feet per second at the present time. 
We should be getting some improvement in communications when 
we; do get locked up on the high gain antenna. And we're con- 
tinuing to stand by at 52:18. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h/lQ/ll GET 52:24 CST 16:18 MC-173/1 



Hey, Don. 

Go ahead, Ken, 

Let me tell you, all our plans 
That's the ideal space food. 
Rog. You guys going to do the 



for peanut 
SKYLAB thing 



S C 

CAPCOM 
S C 

butter were correct 

CAPCOM 
toni ght ? 

CAPCOM 

SC 

CAPCOM 

SC Your subcarrier 

about that peanut butter sandwich. It's like when we're aboard ship, 
you can get a peanut butter sandwich when we're in too much of a 
hurry^to do something else — to do anything else, and it work:s[ 

Okay. We'll pass that along. 
Casper, I've got that list of TBC relay 
reset conditions anytime you're ready to copy. 



16, Houston, are you reading? 

Loud and clear. Loud and clear. 

Okay, we're just doing a subcarrier voice 



ch e ck 



has a good voice and Ken's right 



CAPCOM 
CAPCOM 



an d 



set 



m 



all pencil. 



SC 

CAPCOM Okay, the conditions that set the relay 

One. Spacecraft control switch CMC optics zero switch OFF, 
optics load switch MANUAL. 

SC What to MANUAL? 

CAPCOM Optics load switch MANUAL, and number two 

another way to set it is start on CMC TVC gimbal drive check 
in P 40. Okay, the different ways that it can get 
Number one. Optics zero switch zero. Number two. 
ro switch OFF, and the optics load switch to CMC. 



are 

an d 



c ome 



Sp ace craft 

SC 

please. 

CAP COM 
SC 

back with 
CAPCOM 
SC 

CAPCOM 

SC 

over now? 
CAPCOM 
the tip 
CAPCOM 



control — 



reset are: 

Op t i cs ze- 
N umb er three 



Hey Don, would you standby for a minute 



S ure will. 
Let ' s get 



our (garble) on that time and I'll 



you. 



Ro ge r . 

Hous t on , 16 . 
Go ahead , 16 . 
Okay , on your 



us 



o ve r 



band OX TV switch? 
SC 

tell us — 



You ' re 
aire ady . 

15, could 



plat board, Pete, what do you show 
just about over Florida. Coming down 
you verify the position of the S- 



Yes, it's still in SCI, are 



you going to 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kll^jll CST 16:33 GET 52:39 \1 k I \ 



CAPCOM Off TV switch. 

SC Yes it's still in SCI we figured you guys 

tell us to finish us our film cycling check list. 
CAPCOM Understand its in SCI. 

SC That's affirmative. 

CAPCOM You can take that switch to OFF, but 

leave the pan camera heaters and stuff on. 

SC Okay, well since you don't want us to do 

the exact check list we'll turn the SCI off and data system 
off or you want the data system on. Your not reading any- 
thing now I don't think. 

CAPCOM Just leave the data system on. We've 

commanded it off on the ground. 

SC Okay, data system on. 

CAPCOM Okay. 

SC Houston, with the Anox out looking at the 

es.rth we can see Florida and the real blue water around the 
Bc.hamas. On around the Gulf of Mexico looks like you might 
have some clouds near Houston and on down into Mexico and the 
Great Lakes up in the North where thery is alot of clouds on 
up North of th at , 

CAPCOM Roger, it is overcast here Charlie. 

SC (Garble). And up in the Polar ice cap 

there is a big broken line looks like a river or something 
running down off to the southwest wonder what that feature 
mi gh t be. 

CAPCOM Does it look like - is it a feature on 

the ground or a feature in the clouds? 

SC I thought the whole thing was just snow 

and ice up there maybe it is a clouds - it looked like to me 
its just up at the North Pole in the ice cap area. 

CAPCOM Roger, understand. 

SC And its been there since we launched. 

CAPCOM Roger. 

SC What it appeared to me to be was some 

place its thawed out up there, but - and I was looking at 
water but that might be the clouds actually. 

CAPCOM Okay, Toney is sitting here I'll see if 

he knows anything about it. 

SC Okay, and that storm system that was out 

West of Alaska or there abouts appears to be still there. 

CAPCOM Okay. 

SC Okay, Don I'll bring the copy of the rest 

of those things that we sent the TBC and ABLE. 

CAPCOM Okay, standby just a minute their adding 

a couple of notes to it. 

S C S ure th in g . 

SC Can I read back (Garble) when I read back 

the ones that said it? 



APOLLO 16 MISSION COMMENTARY 4/18/72 CST 16:33 GET 52:39 174/2 



CAPCOM Say again. Ken. 

SC I'll just wait till you get it all, I 

was going to read back the one that sent it. Everybodys 
talking about those binoculars we pulled those things out 
in earth orbit as we go toward the states and it's pretty 
impresive. It works out well in other places it really does 
enhance things you can see. 

CAPCOM Roger. Okay I've got this list on the 

TVC relay set reset conditions again if you want to go back 
into that now. 

SC Okay, all set. 

CAPCOM Okay, the note they added was backup ... 



END OF TAPE 



APOLLO L6 MISSION COMMENTARY hl\i,ni 16:40 GST 52:46 GET 175 



S C 

CAPCOM 
TVC relay set/ re set 
into that n ow . 

SC 

CAP COM 
on the very first 
to set the relay . 
programs or extended VERBS 
52 , or VERB 41 NOUN 91. 

S C 

CAP COM 
through numbers - 
SC 

CAPCOM 
answer on that. 
SC 

CAPCOM 
decide whether it's 
down through number 

SC 

the optics zero off 
CAPCOM 



( garble) 

Roger. Okay, I've got this list on 
conditions again, if you want to go back 

Ok ay , all s et , 

Okay, the note they added was back up 
thing I gave you, the number one conditions 
Those conditions only work In certain 

and those are: P20, 22, 23, 24, 

Ok ay . 

Okay, and 1 believe we've gotten down 

All options (garble) P20 - ? 
Stand by one, Ken, and I'll get you an 



Okay, go ahead. 

Okay, while we're waiting for them to 
all options or not, I believe we got 
2 reset conditions. 

Okay, I copied the optics to zero and 
when in CMC mode control. 
Okay, and that was number 2. 
3 is spacecraft control switch SCS number 4, is 
clockwise. Number 5 is VERB 37 inner, XX inner, 
is fresh start VERB 36. Number 7 is VERB 34 or 
siding mark routine, R 53 display. Number 8, is 



N umb e r 
THC 

Number 6 
pro in the 
AUTO 



enter RCS DAP 
SC 

CAPCOM Okay, 
you immediately following 
then 2.5 seconds later in 



at SPS cutoff plus 2.5 seconds in P40. 

Okay, I didn't understand that one, Don 
it's the - it's what happens to 
the burns - the SPS cuts off and 
P40 the TVC relay gets reset. 



SC 

CAPCOM 
b a ck up unde r 
except number 

S C 

CAP COM 
S C 



Ok ay . 
Okay , 



and on the question of options 
set condition number 1, it's all options 
2 in p rogram 20 . 
Ok ay . 

And that's all of them. 
Okay and I understand that this - 
this can happen when you either set or reset, enable relay, 
is that correct? 

CAPCOM That's affirmative, they say it can 

happen going any change of state on the TVC relay. 

SC Okay, can you tell me if it's the 

change of state of the relay, or just the command to 
change. For instance if we already had it in some of these 
things like a VERB 37 any program, resets it but if it's 
already in the reset position is that a condition that is 
likely to trigger one of these things, or is that one of 
the safe conditions? 

CAPCOM We think, Ken, it's the actual relay 

set/reset changing, not the command. 
SC Okay. 

SC Don, let me read back what you read 

to me and then I'll want to mull that over for a while 



APOLLO 16 MISSION COMMENTARY 16:40 CST 52:46 GET 175/2 



S C 

CAP COM 
S C 

out). 

CAPCOM 

re ad . 

SC 

enable. The 
zero to OFF. 
gimbal test 



an d see 
Ok ay . 

Ok ay . And 



if I have any other questions, 

I think except the TVC enable (faded 



16 , you're fading out, we are unable to 



Okay, the things will set 
spacecraft control switch to CMC 
The optics mode to MANUAL. And 
P40. These things occur only if 



in P20 opcions 0134, P22, P23, P24 



the TVC 

Th e optic 
the CMC TVC 
I'm 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/18/72 CST 16:46 GET 52:52 MC-176/1 



SC options 0134, P-22, P-23, P-24,P-32, VERB 

41, NOUN 91. 

CAPCOM Okay, Ken, on that first 3 of those con- 

stitute one set of conditions and the last one that is, the 
start of CMC thrust spec to control, is another condition that 
is Sufficient by itself. 

SC Okay, understand, the first 3 go with those 

and the CMC thrust spectra control is sufficient by 



p r og rams 
itself. 

CAPCOM 

SC 

whether that 
burn or only 

CAP COM 
b een advi s ed 
there . 

S C 

CAPCOM 
SC 



Ok ay . 

Did you — I don't remember if we concluded 
was one CMC sensor gimbal in preperation for the 
during that test. 

I don't think that's — at least I haven't 
as to which set of conditions we're talking about 



Okay, now I'll read you the reset once. 
Ok ay . 

An OPTICS to 0, OPTIC 0 to OFF when in 
CMC mode, spacecraft control to FCS, translation hand controller 
to clockwise and VERB 37 enter to XX enter. I press start, 
VERB 34 or probe when in the siting mark display. And the 
auto engine OFF or auto to PBC reset after a burn in P-40. 

CAPCOM That's affirmative. There are 8 different 

reset conditions number 2 actually contains 2 seperate items. 
SC Affirmative, (garble) 

CAPCOM Okay. 

SC Okay, Houston, we're starting to fuel 

cell purge and waste water dump. 
CAPCOM roger, copy. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/18/72 GET 53:00 CST 16:54 MC-177/1 



CASPER Houston, Casper. 

CAPCOM Go ahead, Casper. 

CASPER Okay, we've got a LM Delta P of 0.6 

we would like to ahead and pressurize the cabin to get ready 
for the LM en t ry . 

CAPCOM Standby one. 

CAPCOM Okay, Casper, we copy and you can go ahead. 

CASPER Thanks. 

PAO This is Apollo Control at 53 hours 7 minutes 

ground elapsed time. We're having a change of shift here in 
the Mission Control Center. Pete Franks' team of flight con- 
trollers coming on relieving Jerry Griffin's gold team. There 
will be a change of shift briefing with the flight director, 
Jerry Griffin and the spacecraft communicator Hank Hartsfield 
in about 15 minutes in the news center briefing room. The crew 
at the present time is preparing to transfer into the Lunar 
Module for the activation and checkout transferring the pres- 
sure garments into the LM. And at 53:08 and still up live, 
this is Apollo Control. 

CASPER Okay, Houston, waste water dump is termin- 

ated at about 12%. 

CAPCOM Okay, Charlie, we copy that. 

CASPER And, Tony, we're into the equalizing the 

pressure CM LM at this point. 

CAPCOM Okay. 

CAPCOM Apollo 16, Houston. 

CASPER Go ahead. 

CAPCOM When you're working up there in the hatch 

area, I've got a test for you on that docking latch 10 -- when 
it's convenient you might let me know when you do work on it. 

CASPER Okay, why don't we wait until the guys get 

into the LM, and then I'll work on that while they're doing 
that . 

CAPCOM Sounds good. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4718/72 CST 14:05 GET 53:11 178/1 

CAPCOM Apollo 16, Houston, OMNI Charlie. 

S C Ok ay . 

END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/18/72 GET 53:26 CS T 17:20 MC-179/1 

PAG This is Apollo Control at 53 hours 28 min- 

utes. The LM televiewer, one of the Lunar Module flight con- 
trollers here in Mission Control has just reported that from 
his telemetry data it looks as if the crew has opened the hatch 
preparing to enter the Lunar Module at this time. They're sched- 
uled to spend about 50 minutes to an hour in the LM on house- 
keeping activities, in what will be the third entry into the 
Lunar Module Orion during the course of this mission. A change 
of shift press briefing is scheduled to begin shortly in the 
MSG news center briefing room. During the course of that brief- 
ing, we will tape record any conversations with the crew for 
playback immediately following the briefing. 

ORION The Orion is on internal power at 53 28 and 

34. 

CAPCOM Okay, we copy that. Ken. 

PAO This is Apollo Control. The change of shift 

press briefing is ready to begin. We'll switch at this time 
to the MSG news center briefing room. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k I \Z 1 11 CST 17:55 GET 54:00 180/1 



PAO At 54 hours during the change of shift 

briefing, John Young and Charlie Duke entered the lunar 
mcdule, Orion. They powered it up check the communications 
system, completed their housekeeping activities aboard the 
LM and are the the process of returning to the command module, 
The total time from the time the LM was switched to its own 
power until they were back on the command module providing 
pcwer to the lunar module was about 21 minutes. Again, as on 
the two previous occasions when we've had a look at the lunar 
module systems when the data has been transmitted back to 
earth all systems on that vehicle look good. We'll play back 
the accumulated tape conservation with the crew at this time. 



got 



on 



SC 

the com on you 
CAP COM 
SC 
SC 
Orion . 
CAP COM 
S C 

pcickage lanard. 
an d green . It' 

CAPCOM 

CAP COM 



Houston, 16 we're in Orion now - you ve 
should be getting high bit rate momentarily 
Okay, and we would like some high gain. 
Okay (garble) . You mean on Casper's side. 
Okay, Houston we just got some (garble) 



Okay, we have 
Hey , Tony ask 
I look at it yesterday and I 
way out and looks okay to me 



LM data. 

(garble) about this 192 

could see red 
is that copasetic, 
Okay, we'll find out. 



And Charlie w e ve 
lunar surface checklist whenever it's 
s em d them up to you. 
CAP COM 



got some changes to the 
convenient for you we'll 



SC 

CAPCOM 
SC 

ufidate? What 
CAPCOM 



Charlie, Houston. 
Go ahead. 

Okay, Tony says thats okay no problem. 
That's fine and what did you want to 
ch eckl i s t ? 

Okay, your lunar surface checklist and 



cue card 



yc ur LM 
SC 

CAP COM 
EVA 1 , 2 , and 
the EVA 1 , 2 , 
t o Rous ton . We ' d 

SC 

CAPCOM 

SC 

CAP COM 
b ot torn line, 
SC 



th e 



for EV A p rep . 

Okay, Tony I have the cue card go ahead. 
Okay on the cue card it'll be all of them. 
3 and I have one here for post EVA. Okay on 
and 3 after the sentence read clif 02 quantity 
like to add the line. 

Wait a minute, hold on. 
Rog. 

Okay, I've got EVA 1 prep now which column? 
Okay, it's on the left hand column right 
says read cliff 02 quanity to Houston. 
Okay, I've got the (garble) plus 02 



quantity to Houston and the next one is a note is coram is 
no go is that the one that you want? 

CAPCOM Rog, we'd like to put a line in between 

re plus 02 quantity and the note. 

SC Go ahead. 



APOLLO 16 MISSION COMMENTARY CST 17:55 GET 54:00 180/2 



CAP COM 

SC 

CAP COM 
SC 

CAP COM 
is the b ot torn 
full decrease. 

SC 

CAP COM 



an d 



Okay, Squelch VHFB (LMP) - full decrease 
Okay , got it. 

Okay, now in EVA 2 prep cue card. 
Go ahead. 

Okay, this is a left hand column and this 
we add the same line there squlch VHFB LMP 



Okay, go ahead. 
Okay on the EVA 



3 prep same as EVA 2 prep. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY U I1& / 11 GET 54:03 CST 18:00 MC-181/1 



3 prep, the same as EVA 



Okay , 
Okay, 
I got 
Ok ay , 



audio 



VHF 



the post EVA 3 cue card, 



the way 



ORION Okay, go ahead. 

CAP COM Okay, on the EVA 

2 prep. 

ORION 
CAP COM 
ORION 
CAP COM 
down , it s ay s 
ORION 
CAPCOM 
that. Squelch 
ORION 
CAPCOM 
the range of flip 
ORION 
CAPCOM 

your lunar surface checklist, and I'll read them to you when 



go ahead, 
now this is on 
it - go ahead, 
on the third column, 1/3 of 
circuit breaker CLOSE. 
Okay, got it. 

Okay, we would like to add a line 
B, LMP , noise threshold, plus 1 1/2. 
Okay . 

Okay, the point of all of this is to increase 
to LM, in case you're having a crew failure. 
What else you got? 

Okay, it's the same sort of changes to 



r i gh t after 



you 



this 



Okay, Tony, we never use that checklist at 



w e 



'11 copy it in in a 
Okay, that's fine. 
H ous t on , 16 . 
Go ahead, Charlie. 
Okay, I'm a little confused 
guess. It says squelch VHF B LMP 



little bit, okay? 



ab out your 
to equal de- 



re re ady . 
ORION 

time frame, 
CAPCOM 
ORION 
CAPCOM 
ORION 
t e rmin ol ogy , 

crease -- we've only got one VHF B to squelch. 

CAPCOM Right, I understand that. The LMP 

a cue that you're the only one on the com at the time, 
be the one to have to listen and get it down. 

Okay . 

Charlie, Houston- 
Go ahead. 

Okay, when you get a chance there, 
the ED voltage, both A and B. 

Exactly the same 
of th em . 

good show. 



was just 
so you'll 



like 



re ad 



ORION 
CAPCOM 
ORION 
CAPCOM 
you to 
ORION 
volts T ony , 
CAPCOM 
ORION 
CAPCOM 
nead in the 
down and could you 
the clocking index 

ORION 
still minus 3 1/2. 
CAPCOM 
ORION 

this latch, ten, too. 



both 

Okay , 
Rog. 
Okay, 
Lunar Module, 



we would 
thing as yesterday — 37 
and verified off. 



Apollo 16, I guess that's all they 
at your convenience you can power 



read that tunnel index that you go through-- 
Strange to say, it hasn't changed any. It'; 
All right, okay, we copy. 

You were going to tell me something about 



APOLLO 16 MISSION COMMENTARY h/lBJ12 GET 54:05 CS T 18:00 MC-181/2 



Ok ay . 

Do you want 



to do that 



n ow 



Yes, it would be a good time, if you're ready 



m 



sitting here looking at it. 



CAPCOM 
ORION 
CAPCOM 
ORION 

CAPCOM Okay, on that docking latch number 10, de- 

press the yellow auxiliary relief button, noting that the button 
will depress, and whether it stays snapped in after being de- 
pressed. Now the Interest here is if the button will not depress, 
the latch mechanism is either stuck or broken. If the button 
stays snapped in, this indicates -- it probably indicates that 
only partially cocked at launch -- 
It's in -- 
-- and stayed in. 
It's in and it stayed in. 

Okay, then the indication of that is that 
partially cocked at launch. 

Well, do you want me to recock it (garble)? 
No, they had just as soon you leave it the 
because if it is broken it may not be able to get it 
and then it would foul up the undocking 
Sounds like a reasonable plan, 
the aux relief button pushed in, and it stayed 
is going to be left as is. 
Okay, good show. That's it. 
Okay, Tony, we're going to get 
Okay . 

And Houston, we brought LM power back 



the 1 a t ch was 
ORION 
CAPCOM 
ORION 
CAPCOM 
it was only 
ORION 
CAPCOM 
it is 



way 
off 

got 
an d 



again , 

ORION 



of it 



the rest 
CAPCOM 
ORION 
CAPCOM 
CASPER 
at 5 3 49 . 

CAPCOM 
CAPCOM 
relay set condition 
CASPER 
CAPCOM 
up previously — 



Okay , 
there , 



I ' ve 



our suits on 



to CSM 



Okay, we copy that. 

And Ken, we have a correction 



to that TVC 



Okay . 

Okay, on the set and program P 20, we 



re ad 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h/l^Jll GST 18:05 GET 54:10 182/1 



P20 
1 



Ok ay . 

Okay, on the set and program 
it wouldn't set in option two we 
It sets only in option 0 and 4 
Understand that it sets in only 

Th a t ' s correct. 
Tony I'm still trying 



we read 
ve got a 



option 



SC 

CAP COM 
up previously that 
correction to that 

S C 

0 and 4. 

CAPCOM 

SC Tony I'm still trying to get some pictures 

of some selected portions of suit donning on 16 millimeter. 
And I Just checked here on the spot meter and it looks like 
the CIM is going to be marginal for this and I'm looking at 
the CBW that available. And I wonder if anyone would object 
if I put it on magazine hotel hotel. 



CAPCOM 
SC 

CAP COM 

SC 

CAPCOM 
program we're ready 
S C 

CAPCOM 
SC 

CAPCOM 
P20 for us to load 
SC 

CAP COM 
SC 

ACCEPT P20. 

CAPCOM 
CAPCOM 
S C 

CAPCOM 
hotel hotel you 
if you like and 



on that 



Okay, I'll check 
Thank you, sir. 
Ken , Ho us t on . 
Go ahead. 

When your ready for the (garble) monitor 
to load it. 

Okay, I'm in POO and I'll give you ACCEPT 
Okay . 

You've got it. 

Okay and I guess you'll have 
i t . 

Okay, you want me to be in P20 
That's affirmative. 

Well, that was almost right. Your 



to go to 
first. 



in 



Roger. 

Ken , Ho us t on . 
Go ahead. 
Okay, we've got a 
have about 10 percent 



answer in 
avail ab le 



on 
to 



this 
use now 



if you 



to settle 
SC 

10 p e rcent . 

CAPC OM 
CAP COM 
SC 

CAPCOM 
you can press 
SC 

CAPCOM 
SC 

loaded up . 

CAPCOM 
NOUN 2 6 . 

SC 



use the spot meter inside you'll have 
for ASA of 4 000. 

That's affirm 



Thank you I can use 



on 



That's right. 
Ken , Hous t on . 
Go ahead. 

Okay, we've got your program loaded 
with the NOUN 2 6. 

You'll have to stand by a minute. 
Okay . 

Okay, Tony what did you want the NOUN 26 
Right, you can go ahead and call your 



Okay, we're in the LM trying to get 



s o me 



APOLLO 16 MISSION COMMENTARY 4/18/72 GST 18:05 GET 54:10 182/2 



S C 

CAP COM 
PAO 

our playback of 
standby now and 
S C 

NOUN 2b. 

CAPCOM 

SC 

to the end. 

CAPCOM 
CAPCOM 

S C 

CAPCOM 
slide over right 
SC 

VERB 31. 

CAPCOM 
r i gh t . 

SC 

alarm function o 
and unloading. 

CAPCOM 
alarm function 1 

SC 

see if I can get 



pictures of their suits zipping up. 

Roger, I bet that's a real hassel. 

This is Apollo control that completes 
the accumulated tape. We'll continue to 
monitor the conversations live. 

Okay, Tony does that look right for 

Yes, that looks right. 

(G*rble) was the R36 not sliding over 

S t an d by one . 
Ken , Ho us ton . 
Go ahead. 

Okay, if you'll call up VERB 526 it'll 
now your not reading the third register. 
Thank you. Okay, you want me to do a 

That's affirmative. Okay, Ken that's 

Okay, and we don't want to check out the 
r are we just going to check out the loading 

I think they've got something in mind for 
ater but nothing right now. 

Okay, thank you. I'll got back over and 
some pictures of the LM. 



END OF TAPE 



AFOLLO 16 MISSION COMMENTARY l^/lQJll CST 18:10 GET 54:15 183/1 



CAPCOM Ken, Houston. 

S C Go ahead . 

CAPCOM I guess they would like a EMI now. 

SC You've got it. 

CAPCOM Okay. 

SC Anything else before I go into the LM ? 

CAPCOM Everybody is shacking their head I guess 
it's okay about the time the hatch we'll think of something. 

SC Okay. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/18772 CST 18:25 GET 54:30 MC-184/1 



but 



SC 

15% on magazine 
CAP COM 
CAP COM 
there we'd like for 
ORION 
collar and I'm 
CAP COM 
ORION 
CAP COM 
ORION 
PAO 



th e 



command niodule 



coming up on 



h ours 44 



And Tony, we used only 5% on (garble) 
HH. 

Okay, we copy Chat. 
And when you get back in the 
you to go to block on the CM. 
Okay, in block and Charlie's 
going to don my suit. 
Ok ay . 

Houston, 16 How you read? 
Ah, you sound good, Charlie. 
Ok ay . 

This is Apollo Control at 54 
minutes. The Apollo 16 crew at this time is in the processs 
of donning their pressure garmet assemblies, without helmet 
and gloves. Young and Duke, are then scheduled to re-enter 
the lunar module and return to the command module and the 
exercise is part of a check of the procedures that the crew 
will be using on the day that they performing the landing on 
the Moon in suiting up and entering the LM, Following this 
exercise the crew is scheduled to eat, during the eat period 
they will be running the skylab food test. There are several 
skylab food items packed in with the crews regular food. Such 
things as snap top cans containing foods such as dried peaches 
and puddings, peanuts. Also one pack with spoonable foods, 
some postage stamp size salt dispensers, and the plastic 

And while trying out this food 
getting comments from the crew on 
food in its packaging and ease in 

They are also scheduled to take some 
of the food packages in use, Apollo 16 
at the present time is 170,817 nautical miles from Earth and 
the spacecraft velocity is 3,063 feet per second. 



bellows drink containers, 
we expect that we will be 
how easy it is to use the 
handling and preperation. 
still and motion pictures 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hH^Jll GST 18:49 GET 54:54 185/1 



SC 

CAP COM 

SC 

back in the command 
prcbe in right now. 

CAP COM 
on this, but when 
jet monitor test. 

S C 

CAP COM 
SC 

CAP COM 
SC 
SC 

CAP COM 

SC 

in fact pretty easy 
zipping up. And in 
extremely difficult 
across the small of 
only way he was able to do 
in the front first so that 
bit better and then he got 
only thing that worries me 
I had grown an inch or two 
I didn't have the LCG on. 



Houston, 16. 
Go ahead, Charlie. 

Okay, we're back in the LM - correction 
module and Ken's closing out putting the 

Okay, sounds good. And there is no hurry 
Ken gets all comfortable we've got that 



give you a call 



Ok ay. Ken's busy we'll 
Ok ay . 

Ho us t on , 16 . 
Go ahead. 
Okay , s tand by . 
Okay, Tony you read. 
Sure do sounds good. 

Okay, during the suit donning went okay, 
until we got to the part of John and I 
my suit in the LM zipping up John had an 
time getting the restraint zipper closed 
my back. It was extremely tight and the 
it was to zip the restraint zipper 
the zipper would line up a little 
the back part closed. Now the 
is that the suit to me felt like 
and it was tight in the legs and 
And with the LCG and everything 



else it might have built up where it would have been really bad and 
we were wondering if it might be possible to if you guys would 
let us let the legs out on this suit maybe a half an inch to 
an in ch . Over. 

CAPCOM Okay, we'll talk about that. Go ahead. 

SC I'm not even sure that would help but 

it feels like it would to me. 

CAPCOM Okay. Charlie I guess ... 

SC Tony there was no trouble at all with the 

pressure sealing zipper and the pressures it was just the 
restraint. It was just in that one place in the small of 
my back. 

CAPCOM Okay, we copy that I guess that 

us a data point, you go in zero-g. 

That's what it feels like that I 



S C 

out an inch 
CAP COM 
to your six 

SC 

back in. 

CAPCOM 
SC 

CAPCOM 



or so 



feet 



gives 
stretched 

You better watch that you're pretty close 
Too late now. Okay, Tony the hatch 



Ok ay . 

Houston, are you still there? 
Oh yes. Ken, we're still here 



1 s 



How are 



APOLLO 16 MISSION COMMENTARY k / IQ 111 GST 18:49 GET 54:54 185/2 



CAP COM 

S C 

I'm re ady to 
CAP COM 
CAP COM 

S C 

CAP COM 
BD roll jets 
every ten min 
light sometim 
turn back on 

SC 

CAP COM 
moni tor. 

SC 



you doing? 

Just fine got the tunnel closed out and 
copy your next procedure. 

Okay, stand by one. 
Ken , Hous t on , 
Go . 

Okay, we'd like you to disable all the 
and your cycling against the stops about once 
utes and so expect that you'll get your ISS 
e in there and when you get it v^e don't either 
the jets we just like to look at it awhile. 

Okay, how about if I just go free? 

Okay, I guess the free killed the jet 

Oh , ok ay . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kjX^Ill GET 55:16 GST 19:11 MC-186/1 

CAPCOM Ken, just to verify thatj if you go free -- 

CMC free, the program doesn't monitor, if you go back to AUTO 
it does. You don't have to put the program back in. 

SC Rog, I understand that. I guess I just 

wasn't thinking — what I did Tony, was rather than leave two 
Axes in control and one of them free, I put all in MANUAL 
attitudes switches (garble) command, and we're still in CMC 
Mode AUTO, 

CAPCOM Rogj we saw that down here. It looks good. 

SC Okay, you can watch it all day long — what- 

ever you want there. 

CAPCOM Okay, we'll just watch. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k/lQ/ll GET 55:22 CST 19:17 MC-187/1 



SC 

CAPCOM 
SC 

status flights 
it's okay with 
CAPCOM 
SC 

going to work 
deadband. You 
awhile ? 

CAPCOM 
we'd like 
S C 

CAPCOM 
c on veni en ce . 
SC 

about that, thank 
S C 

BD roll? 



n o 
i f 



not 
th e 
for 

an d 



y o ur 



Sure enough, there it is. 
Okay, seems to work. 

And, sure enough, just like advertised, there's 
on DSKY warning panel, 
you, I'll turn off the 
Okay, go ahead. 

Now we're still outside the deadband, that's 
unless I cycle it free and back to recenter 
folks want to watch it outside the deadband 



And I'm going to go ahead, 
channel 11 bit one. 



to go 



That's okay, I guess we're happy with 
ahead and terminate it. 
Okay . 

And Ken, I guess you can go on to FTC 



i t 



at 



Ok ay , 
you. 

Do you folks have 



I was just getting ready to ask 
me to continue using 



you 



CAPCOM Rog, BD roll. 

PAO This is Apollo Control at 55 hours 35 min- 

utes. A short while ago Ken Mattingly reported that the tunnel 
had been closed out, indicating that Young and Duke had com- 
pleted their suit exercise, were back in the Command Module 
The tunnel hatch replaced after all of the probe and drogue 
assembly equipment had been reinstalled. And we heard Charlie 
Duke report that his suit -- when John Young attempted to zip 
it up across the back appeared to fill tighter than he was 
used to feeling in that suit. Charlie said he didn't feel this 
would cause him any particular problems, but he was concerned 
that perhaps the length would be too short when the suit was 
pressurized, and suggested the possibility -- or at least asked 
that the people here on the ground look into the possibility 
of lengthening the suit a bit using laces that are in the legs. 
This is a relatively minor adjustment and we're reviewing 
that possibility. And we will get back to Duke at sometime 
later in the mission with an evaluation of that suggestion. 
Following that, Ken Mattingly was involved in some activities 
using the onboard computer checking out a new program flying 
on this mission. This is a program which during Mattingly's 
solo activities in orbit around the Moon, would give him a 
warning using the inertial subsystem warning light on the 
display panel, to alert Mattingly to the fact that a thruster 
was stuck on -- should one of the thrusters stick, for example 
during a sleep period, an opposing thruster would then begin to 
fire to counteract the effects of this, and the result being 
an unnecessary depletion of a thruster propellant. In order 
to avoid this sort of situation, a change has been made in the 



APOLLO 16 MISSION COMMENTARY GET 55:22 CST 19:17 MC-187/2. 



P AO one of the eraseable memory programs -- or 

aciiually an eraseable memory program has been added, which 
Mattingly will activate during that portion of the mission, 
and which would give him the warning through the inertial 
subsystem light, should one of the thrusters stick on. And 
then you heard the test of that program checked cut and he got 
the light as expected. At the present time Apollo 16 is 
172 327 nautical miles from Earth. And the spacecraft it 
traveling at a speed now of 3028 feet per second. 

CAPCOM Okay, Apollo 16, OMNI Charlie. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/18/72 CST 19:34 GET 55:39 MC-188/1 

ALL DEAD AIR 
END OF TAPE 



APOLLO 16 MISSION COMMENTARY kllZllI CST 19:40 GET bb'.kb 189/1 



CAPCOM Charlie, Houston. 

SC Go ahead. 

CAPCOM Okay, on your tight suit there we were 

wondering if you could say a few words about how it felt 
during launch day. 

SC Well, it was a little tight launch day. 

We - you know we fitted in pressurized Tony and it felt okay 
then. Launch day I thought the legs were a little tight but 
not much. Once we get it zipped Tony it feels a little tight 
but pressurized its okay. It's just the zipping part that's 
wor ry in g us . 

CAPCOM Understand. 

CAPCOM Well, everybody is thinking about it, 

and we'll come back with an answer on it a little later. 
Right now I think the general feeling is that most people 
just as soon you not tamper with it unless you feel very 
s t rong ab out it. 

SC Well, that's our opinion too. Our next 

solution or next question is maybe breaking out the LCG and 
putting all the gear on and seeing how it goes with all 
of the gear ... 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/18/72 CST 19:46 GET 55:51 MC-190/1 

That's our opinion too. Our next solutlon-- 
our next question is maybe breaking out the LCG and putting all 
the gear on and seeing how it goes with all of the gear. Our 
question there is if we break into one of the LCGs right now 
will it effect -- get any gas in the tubes will it effect the 
start up on the PLSS? 

CAPCOM Okay, we'll work th at on e . 

C^PCOH Okay, Charlie, we've looked at that LCG 

problem and you're right, if you break it out early you'll 
probably get gas in there and never be able to get it out and 
it will effect the cooling. 

Okay, John and I were going to break into 
those LCGs and sleep in them tonight prior to PDI, what do you 
think about that idea then? 

CAPCOM Okay, they're over there discussing that 

again . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h/l^/ll CST 19:52 GET 55:57 191/1 



CAP COM Ken, Houston. 

SC Go ahead, over. 

CAPCOM Okay, your rates are low enough for the 

PTC. 

SC Okay, thank you. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/18/72 CS T 19:58 GET 56:04 192/1 



CAPCOM Apollo 16, Houston. 

SC Go ahead. 

CAPCOM Okay, we'd like your on board readings H2 
tank 1 pressure, 

SC It's empty, Houston. 

CAPCOM Okay, we copy that. 

CAPCOM Okay, Ken, that's transducer problem probably, 

they've had that history of problems with that transducer. Pra- 
ia un ch . 

SC Yeah, we remember that. 

CAPCOM Okay. 

SC It was glitching launch day but it 
looks like now it's sort of stabilized. 

CAPCOM Copy. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/18/72 CST 20:04 GET 56:09 MC-193/1 

CAP COM Apollo 16, Houston. 

SC Go ahead. 

CAPCOM Okay, we'd like you to go to OMNI Bravo, 

instead of the high gain and we'll handle the switching. 
SC Okay. You have OMNI Bravo. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/18/72 GET 56:14 CST 20:09 MC-194/1 



SC Houston,16. 
CAPCOM Go ahead. 

SC Okay, we're getting ready to go to work on 

this SKYLAB food preparation bit, and we're trying to check out 
these camera settings. We've got 16 millimeter magazine 
allocated for this with GIN film in it, and by checking the most 
light that I can get looks like on most objects we be running 
with the lenses wide open aperature and about a 60th of a second and 
I guess I'd like to know if you want to do that, or if you'd like to 
use a higher ASA and process the film differently. 

CAPCOM Okay, we'll talk about that. 

Tony, just looking here, and if we go to the 
eighteen millimeter lens we can open it up to at one. That gets 
our speed up to about a 250 th looks like a lot better way to operate. 

CAPCOM Ken, the com is pretty bad right now. We 're 

having a hard time getting that. We understood that the light 
meter indicates that the film that was indicated to use here 
probably isn't going to be fast enough, and you are asking to use 
a faster film, but we didn't get there how severe the problem was. 

SC Houston, 16. 

CAPCOM Go ahead. Ken. The corn's still pretty bad 

tho ugh . 

SC Okay, we're going to get started on the by- 

static radar frequency check if you're ready. 

CAPCOM Okay, Charlie, I guess we would like for you 

to hold off for a minute on that VHF test. 

SC Alright. 

CAPCOM Ken, Houston, the com may be a little better 

now, if you can go through the problem again. 

SC Okay, Tony, it looks like it is not as bright 

in here as we would like to be able to get it. And we'll try -- 

END OF TAPE 



APOLLO 16 MISSION COMMENTARY h/lB/12 CST 20:17 GET 56:22 195/1 



SC Okay, Tony looks like it is not as bright 

in here as we would like to be able to get it, and we'll try 
timing it with some of the window shades up to see if we could 
get it a little bit brighter. The cabin front lights looks 
like a sixtieth of a second is about the max 1 can get off of 
the 10 millimeter lens and I was going to suggest either going 
tc the 18 which will give me a little faster shutter speed 
because its got a wider aperture or we'll take a little less 
photography and just do it when the sun gives us good illumination 
through one of the windows. 

CAPCOM Okay, we copy that we'll work it. 

SC I think we can get more uniform photog- 

raphy if we did it with the window shades up and with all our 
lights in one fixed position that way we'll get a lot more 
photography done rather than have to wait. I really don't 
think you can afford to wait until the sun is in just the right 
place to do your eating. 

CAPCOM Ro g , understand. 

SC Okay, Tony we're going to restow my suit 

if you guys don't want us to touch it. 

CAPCOM Right, we're not goint to worry about it 

tonight. We'll have some sort of an answer tomorrow. So 
you go ahead and stow the suit. 

SC Okay. And our H2 tank pressure just 

dropped back down to 240. 

CAPCOM Okay, we saw that. 

SC It's b ack up to 2 70 . 



END OF TAPE 



APOLLO 16 MISSION CONTROL k/lBJll GST 20:23 GET 56 :2 8 MC-196/1 



CAP COM 
CAPCOM 
S C 

CAPCOM 
have you go ahead 
SC 

CAPCOM 
already. 

SC 

stowing one of our 
CAPCOM 
SC 

CAP COM 

SC 

of things take. 



Ken , Hous ton . 
Ken , H o us t on . 
Go ah ead . 

Okay, after much debate I 
and use the 18 millimeter. 
Okay, thank you. 
All right. If you're not 



guess we can 



already done 



I really think 
passengers here 
(laughter) All 
And -- 



we'll get the -- we're 
back in his suit bag. 
ri gh t . 



Ok ay , I — we ■ re - - 

You'd be surprised just how long those kind 
You start on something like that and it almost 



fits and you refold it and it almost fits again and it 



s on 1 y 



because you know it's fits that you keep trying with it. Cause 
you sure couldn't prove it by us. 

CAPCOM Understand. It doesn't sound like too 

much fun. We'd like to reverse ourselves -- 
SC Ah, we didn't say that. 

CAPCOM Right. We'd like to reverse ourselves 

on something I sent up awhile ago. It doesn't seem to be any 

LCGs early, they were thinking 
that won't be a constraint as 



problem with breaking out the 
about a skylab situation. So 



far as whether 
and send it up 
SC 

that we've got 
take a long time 



to try it tomorrow we'll work that 



we want you 
tomorrow. 

Okay, I guess the only thing on that is 
a busy day coming and these things just really 
by the time you put on the suit and then you 



too , 



play with it and then if we have adjustments to do 
It's going to take up a lot of time. 
CAPCOM Right. 

SC So the sooner the better I 

so you know already. 

CAPCOM Rog. But I particularly wanted to let 

know there was 



Why 



guess , J us t 



you 
b e f o re . 

S C 



no problem with sleeping in it. That night 



SC 



what 



much 



can 



That's a big help. Thank you. 
Yeah, I didn't think there was, that's 
they did on Apollo 10. 
CAPCOM Rog. 

CAPCOM Remember Apollo 12 guys before you 

with tha t s ui t . 
SC Okay. 

SC Of course the problem is going to be if 

t get it on at all, that's going to be a real problem. 
CAPCOM Rog. 



do too 



w e 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/18/72 CST 20:30 GET 56:34 197/1 



PAO This is Apollo Control at 36 hours 46 min- 

utes. The crew should be shortly beginning their dinner which 
will include skylab food items that they will be evaluating. 
At last report Ken Mattlngly mentioned that they were busily 
involved in restowing the suits and when that was completed, 
they would be scheduled to begin their eat period and to give 
us an evaluation of the skylab food packets that they will 
be trying out at this time. We've also had some additional 
reports, primarily from Charlie Duke, with some comments from 
John Young on the tight fitting suit. Duke first reported 
the suit appeared to fit tighter than he had expected. After 
they had gone through the exercise of donning the suits and 
entering the lunar module, in his latest report, Duke said 
that his primary concern was not for the suits fitting properly 
once it was pressurized then he felt that it would fit properly 
and be comfortable, but that they might as he was concerned 
that there might be problem in getting into the suit when 
wearing the liquid cooled garment. This was not worn during 
tonight's exercise and Duke suggested that it might be wise 
to put on the liquid cooled garment at some time and try 
getting into the suit to see if there would be a problem when 
getting into the suit in the same configuration that they will 
be using the day of powered descent, the landing on the lunar 
surface. We've recommended that the issue be put to rest for 
tonight and we are going to think about it here on the 
ground and see what steps might be taken tomorrow. And deal 
with the problem following the crew rest period. The Flight 
Dynamics Officer reports that the expected impact coordinate 
for the Saturn III stage, the S-IVB remained vertually un- 
changed. That predicted impact point is at 1 degree 
50 minutes north and 23 degrees 18 minutes west and the pre- 
dicted time of impact remains 75 hours 7 minutes and 3 seconds. 
This places the (noise) We just had a call to the crew. We'll 
standby for that. 

CAPCOM Apollo 16, Houston. 

CAPCOM Apollo 16, Houston. 

CAPCOM Apollo 16, Houston. 

SC Go ahead. 

CAPCOM Okay. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/18/72 CST 20:45 GET 56:50 198/1 



S C 

CAP COM 
VHP test when your 
S C 

CAP COM 
S C 

P is in duplex and 
CAPCOM 
S C 



Okay , go ahead . 

Okay, we would like to start with the 
re ady . 

Okay, give us a couple of minutes here. 
Ok ay . 

Okay, Tony we have VHF antennas on left 
the ranging is on. 
And ^Je're getting the VHF. 
Ro ge r . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/18/72 GST 20:52 GET 56:57 199/1 



CAPCOM Apollo 16, Houston. 

CAP COM Apollo 16, Houston. 

CAPCOM Apollo 16, Houston. 

SC Go ahead, Tony. 

CAPCOM Okay, we're going to draw up your S-band 

uplink for a little while. We'll be back in about 10 minutes. 

SC Roger, understand. 

CAPCOM Apollo 16, Houston. 

SC Go ahead, Tony. 

CAPCOM Okay, we're back early. We'd like you to 

go ahead and terminate the VHF and while your over that way 
we'd like you to switch the high gain to wide beam. 

SC Roger, high gain going to wide and ter- 
minate the VHF. 

CAPCOM Rog. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hllS/12 GET 57:24 CST 21:20 MC-200/1 



SC — the VHF is terminated and you got wide on 

the high gain. 

CAP COM Okay. 

PAO This is Apollo Control at 57 ho urs 24 minutes 

The series of checks that we have been performing with the space- 
craft using the onboard VHF and S-band systems are a prepara- 
tion for an experiment that'll be performed in lunar orbit - 
the by static radar experlemnt which uses the spacecraft's 
communications equipment in a passive experiment to determine 
something about the electromagnetic properties of the lunar 
surface. The radio signals are reflected off the Moon, and 
the Moon affects the way in which they are reflected, and these 
characteristics are measured on Earth in an experiment per- 
formed by Taylor Howard of Stanford University. The VHF sig- 
nals are received by the Stanford Research Institute in Calif- 
ornia, and the S-band signals are received by the Manned Space- 
flight Network Station at Goldstone, California, the 210 foot 
antenna. Flight Dynamics officer advised us moments ago that 
while the crew is sleeping at 59 hours 19 minutes 45 seconds, 
we're scheduled to cross that mythical line known as the lunar 
sphere of influence, the point of which we begin calculating 
the increasing of the lunar gravity on the spacecraft. Our 
displays here in Mission Control shortly after that point are 
generally switched over to Moon reference from Earth reference. 
The velocities that we have been watching decrease steadily 
up to now, will then begin to increase as the spacecraft is 
accelerated toward the Moon. At the present time we show 
Apollo 16 175 461 nautical miles from Earth, and traveling 
at a speed of 2957 feet per second. As is usually the case 
when the spacecraft is this far from Earth, and when we're 
using the OMNI directional antennas and the spacecraft is ro- 
tating in the passive thermal control board, we do have some 
noisy communications as we drift from one antenna to the next. 
And this mission is no exception in that regard, and so we will 
have from time to time periods of noisy communications. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/18/72 CST 21:25 GET 57:29 MC-201/1 



S C H ous t on , 16 . 

CAPCOM Go ahead. 

SC We're trying to work on the pre-sleep 

checklist and this little part about the OPTICS to 0 and 
OPTICS power OFF, will any of that do these things we don't 
want to do with our TVC enable. How about just leaving it 
all like it is? 

CAPCOM Okay, we're working on it. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/18/72 CST 22:02 GET 58:07 202/1 



Okay, Houston, are you ready for the on board 



SC 

re adout . 

CAPCOM Yup. go ahead. 

Houston, Apollo 16, over. 

CAPCOM Go ahead, Apollo 16, we're ready to take the 

readouts . 

CAPCOM Apollo 16, Houston. 

SC Houston, Apollo 16, over. 

CAPCOM Okay, 1 guess we have that. A weak period 

there. Yes, we're ready for your readouts. 

SC Okay, battery C Is 36.7 pyro battery A 37 

pyro B 37, RCS A 87, B 90, C 92 and D 96. We are on Main A 29 volts 

CAPCOM Okay, we copy that. 

^'^ And you'll be happy to know we've com- 

pleted the skylab food evaluation with very few casualties. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kjY^jll CST 22:08 GET 58:13 203/1 



SC And you will happy to know we completed 

the Skylab food evaluation with very few casualties. 
CAP COM Congratulations. 
SC Andnolossoflife. 
CAPCOM Very good. 

SC However it took a lot longer than we 

allowed for it. 

CAPCOM Okay. 

CAPCOM And Apollo 16 I guess it's okay to go 

to that optic 0 and 0 which you are and G and power optics off 
SC Okay, thank you now. 

CAPCOM We aim to please. 

SC Okay Houston are you ready for the E 

memory dump over. 

CAPCOM Okay, I guess we would just like you to 

skip the E mod . 

CAPCOM 

CAPCOM 

S C 

d urap ? 

CAPCOM 
S C 

CAPCOM 
that E mod tonight 



And Apollo 16, Houston. 
Apollo 16, Houston. 

Houston, you ready for a good E memory 



Okay, John do you copy us now? 
Yes, finally. 

Okay, I think we'd like you to just skip 
We do have a couple of changes to panel 
230 when you get down that way. 

SC Oh yes, we plumb forgot about that. Okay 

go ahead. 

CAPCOM Okay we would like a ... 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h/lQ/ll CS T 22:20 GET 58:25 MC-204/1 



sc 


Okay, go ahead. 




CAPCOM 


Okay, we'd like pan 


camera self-test off 


SC 


That's all? 




CAP COM 


Mapping camera off. 




SC 


That's all? 




CAPCOM 


And then down there 


below the service 


module AC power 


off. 




SC 


Okay, and that's all 




CAPCOM 


Okay, that's all we' 


ve got . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY Mld,/12 GET 5 8 : 32 CST 22 :2 7 MC-205/1 



SC All right, Houston, 16. can I talk to somebody 

about chlorine injection. 

CAFCOM Okay, what's the problem? 

SC I'm not sure what my first problem is, I'll 

give you some symptoms. I put the chlorine in, and when I 
screwed down on it it seemed like it was just a little bit 
stiffer to screw down on than they had been before. But it 
wasn't obvious that it was that much di f f e rent ' caus e they're 
always a little tight. And when we went to take it off, I 
got a whole lot of water bubbling out from around the port 
I couldn't figure out where it came from. Seemed like it — 
the first thing I thought of was the same thing that happened 
to 15 with the nut backing off. And when we got it out, it 
looked like the bubbling seemed to stop fairly quickly, and 
the first thing I tried to do was to take the collar of the 
adapter down tight, and right now I still have the chlorine 

injector adap — needle adapter still on the chlorine port. And I tightened 

it down by hand, and it seems like it's holding 

it. The chlorine ampoule itself was broken when we took it 

out of the injector drum. When all of that popped up, I wanted 

to get some buffer in with it — you know the system, because 

it looked to me like some of the chlorine had gone in. So I 

started to try to put some buffer in and it looked like it 

might have leaked a little bit, and then I went to take it out 

out of the — take the injector out of the adapter. And when 

I did it looks like it squirted — 



END OF TAPE 



APOLLO 16 MLSSION COMMENTARY 4/18/72 GST 22:40 GET 58:45 206/1 



■•• out of the - taking the ejector out 
of the adapter. And when I did it looks like it squirts 
fluid from two holes that are 180 apart from each other on 
the adapter. And I guess I don't know what those two holes 
are for. Looks like maybe the needle is not going in, but 
I'm not sure what it is now. Do you have someone that might 
know how it's put together. 

CAPCOM Roger, we'll talk about that. I know 

all about those two holes in that adapter. 

Okay, these are the two on the outside 



S C 



now 



CAPCOM Rog, I know exactly which ones your talk- 

ing about . 

CAPCOM Ken, Houston. 

SC Okay, go ahead. 

^^^COM Okay, when you put that buffer in would 

you verify that you left the nut all the way screwed down to 
the ten minutes and that's the period when the water was 
coming out the two holes, 

^o, the water came out of those holes - 
lets see now, I put the buffer in, I put it In the ejector 
and then I put the ejector into the adapter and when I went 
to screw down on the ejector it looked like it was starting 
to leak fluid around the ejector again. So I stopped and it 
didn't look like it was doing it anymore and I thought I 
would look to see, by this time I was getting suspicious that 
maybe the needle wasn't open so I decided to take the ejector 
off of the needle adapter. I took it off and everything 
looked okay and when I went to put it back on when I depressed 
the needle - when you push the ejector under the adapter 
that's when it looked like it squirted out of these two 
holes on the side and it did that several times and it 
repeated itself. 

CAPCOM Okay, we copy that. Was the nut snugly 

against the ampule when you tried to put it back on. If you 
backed off of the nut it may have allowed the - it may have 
allowed the ampule to slide back up in the compartment there 
and then you were just opening up the needle. 

Well, I thought it was down snug, if it 
wasn't snug would it push water out of those two side ports. 

CAPCOM Yes, it sure would I had that happen in 

the prechlorination there on the pad before launch. I 
had backed off on the nut and instead of just filling up 
that ampule the water pushed the ampule off the needle and 
then once its done that the water just goes back around and 
comes out those two holes. 

Well, I can't say that didn't happen. 
The first problem occurred with the chlorine injection. 

CAPCOM Right, I didn't see that on the pad. 



APOLLO 16 MISSION COMMENTARY kiX^ill CST 22:40 GET 58:45 206/2 



SC My first problem was when I went to put 

the chlorine ampule in and at some point in there when I went 
to take it out I tried to get it in and it didn't look right 
when I went to take it oat it started bubbling all over and 
I couldn't tell where it was coming from then. And whether 
it; came from those two holes or not that's quite possible. 
I'm not sure. When I looked at the ampule itself after I 
opened up the ejector you could see that the bottom lid had 
broken, the little sliding plug in there. 

CAPCOM Once that thing isn't water tight anymore 

you'll get leakage into that container and that'll all come 
out those holes. 



SC 

the one when 
CAPCOM 

here and try 
SC 

CAP COM 
y(3u to agree 
buffer again, 

SC 



Okay, then perhaps 
the first ampule breaking 

Alright, we'll try 
(garble) . 

Say again. 

I was going to say we'll 
on a procedure and then go back 

Okay, thank you. 



the only problem was 
to get you a procedure. 



try 
an d 



an d 
try 



get 
th e 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hjl^jll GST 22:49 GET 58:54 207/1 



CAP COM 
here and go back 
S C 
S C 

CAP COM 
(garbled) 
SC 

CAP COM 
S C 

CAP COM 
p ro ce dure . 

S C 

tonight or tomorrow 

CAP COM 
don ' t you? 

S C 

chlorine went in. 
who have (garbled) 
how much chlorine 
CAP COM 
CAP COM 



Al r i gh t , we 
an d try — . 
( garb led) 
Say again. 
I was going 



11 try to get you a procedure 



to say we try to get you a 



( gr ab le d) 
And then go 
Ok ay . I gues s 
Okay, hold off 



back and try 
we can do 
on that. 



the 
that . 
We ' 11 



buffer again 
get a 

Okay, is that something you want to do 
You want that buffer in there tonight 



i t 



I can ' 
little , 

I i us t 



c an t 



I don ' t kn ow . 
Perhaps a very 
responsibilities, 
may have gotten in. 
Okay, we understand. 

Okay, Ken, I guess we'd like you to take 



vouch for how much 
It's up to the guys 
tell you 



that buffer ampule again and screw the nut down on it so 



i t on 
you 



make 



L — O — «- a. ^ .T iiut, *~i.\jvt li WLl XL at 

that you think it's good and snug in there and then put 
the adapter and see if it will take the buffer. Before 
close it all up again, you might look at the ampule and 
hasn ' t cracked. 

Ken , H o us t on . 
Ken , H o us t on . 
Go ahead, 

Did you get that about going ahead with the 



comm 
mak e 



there, 
sure 



sure it 
CAPCOM 
CAPCOM 

SC 

CAP COM 
buffer? 

S C 

CAPCOM 
We'd like you to 
it isn't cracked 
little container 
snug and then go 

SC 

new one. Don't we have a 

CAPCOM Okay, 
brand new one. 

S C Ok ay , „ - - - , 

looking over the gauges and I know our onboard gauges isn't the greatest 
thing in RCS. Could you tell me how we stand on RCS ? 

CAPCOM Okay. I'll get that. 

CAPCOM And Ken, at 54 hours you were 2 percent ahead of 

your RCS budget that's 25 pounds to the good. 
SC Okay. Thank you. 



No I didn't 

Oh, okay, we probably had some bad 
take a look at that buffer ampule and 
and if not then go ahead and put it in that 
and screw that nut so you feel it's good and 
ahead and see if it will take the buffer. 
Okay. How about if I just take a brand 
couple s pares . 

they agree. Why don't you take a 
and while I'm doing that I'm just 



APOLLO 16 MISSION COMMENTARY 4/18/72 CST 22:49 GET 58:54 MC-207/2 



S C I'll 
kiada looks bad. 

CAP COM Okay 

2 percent low on that. 

SC Okay 

S C Ok ay 



get in a low bias in QUAD A and just - - 
We - - our bias is that you're reading 



Tony, I've got the buffer in and I 
noticed a slight little spit when I put it in. That's probably 
residual. So I'll wait 10 minutes and then suck it out. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kJlQjll CST 22:57 GET 59:02 MC-208/1 



SC the buffer in and just a slight little 

spit when I put it in, that's probably residual. So I'll wait 
10 minutes and then suck it out. 

CAPCOM Okay, good show. 

Okay, Houston, the 02 flow high and the 
cabin is pumped up to 57. 

CAPCOM Okay, cut the (garble) 

PA.0 This is Apollo Control at 59 hours 

9 minutes. The crew at this time completing the items on 
their checklist prior to getting an 8 hour rest period. And 
we had a description from Ken Mattingly of some problems 
he was having getting the chlorine and buffer injected into 
the drinking water system. This is done with a syringe type 
device which injects the chlorine and the buffer alternately 
through a diaphragm in the waste - in the water management 
panel of the spacecraft. This is Injected through with a 
hyperdermic needle arrangement. And from the descriptions 
given by Mattingly and the disucssions that he had with CAPCOM, 
Tony England, it appears that the problem he had was related 
to the way in which the ampules of chlorine and particularly 
the buffer are placed in the syringe. They are held in place 
by the nut that screws down on the ampule and a plunger 
device then is activated which drives the buffer out of the 
syringe and into the water supply. Apparently the nut is 
not down tight enough holding the - which would have allowed 
the ampule to ride up off the needle and instead of buffer 
being injected into the water, water was allowed to flow back 
out and come out of the syringe. Mattingly reported when 
he followed the procedure outlined by Tony England that 
apparently the buffer was injected properly and we believe 
that sufficient chlorine was injected to take care of the 
requirements there and the plan at this point is to put the 
crew to bed as soon as possible. At the present time we are 
showing Apollo 16 178,435 nautical miles from Earth 
and the speed of the spacecraft at this time 2,891 feet per 
second. In about 8 minutes Apollo 16 will be crossing the 
imaginary line designating the lunar sphere of influence. 
At this point the Moon's gravitational force becomes the 
dominate gravity force acting on the spacecraft. And here 
in the control center our displays are monitoring the space- 
craft velocity and altitude will switch over from Earth 
reference which we've been using the bulk of the flight to 
Moon reference. At that point the Earth will be 178,673 
nautical miles from the spacecraft and the spacecraft will be 
33,821 miles from the Moon. The velocity of the spacecraft 
with respect to the Earth at that point will be 2 , 887 feet per 
second and wity respect to the Moon it will be traveling 
3,482 feet per second. The time of that sphere crossing is 
59 hours 19 minutes 45 seconds. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4-18-72 CST 23:07 GET 59:12 MC-209 



CAP COM Ken Houston. 

SC Okay, Tony, got that buffer in and out 

and all looks normal now. 

CAP COM Okay. Good show. 

SC Ho us ton, 16. 

CAPCOM Go ahead. Ken. 

SC Okay. Looks like we've got the buffer 

in and the water back out and everything looks normal now. 

CAPCOM Good show. If you didn't get much 

chlorine in the buffer, it won't hurt anything, but it would 
have hurt the other way if you'd put the chlorine in with- 
out adding the buffer, so - - Either way, we're in good 
s ]i ap e n ow . 

SC Okay. Then I guess our only problem 

then was just the fact that I probably broke that first 
chlorine ampule some way. 

CAPCOM Rog. 

SC Okay, Tony, I guess I'm ready to get a 

film status report. 

CAPCOM Okay. Go ahead. 

SC Okay, on Magazine Victor Victor, we're 

on frame 21; Magazine Hotel Hotel frame 85; Magazine Oscar 
Oscar frame 34; November November is also 34; Juliet Juliet is 
f i f ty pe rcen t. 

CAPCOM Was that five zero percent? 

SC That's five zero percent - That's 

a f f i rmative . 

CAPCOM Okay. 

CAPCOM Okay, we've copied all of those. 

SC Okay, I guess we're about ready to sign 

off. Do you folks have any last words or any questions? 

SC Houston, we're about ready to go to 

sleep. Have you got any questions or anything you want to 
tell us before we shut down the Comm system? 

CAPCOM Okay. We're running around here to make 

sure there's nothing. I just looked through your last system 
report that came around here and everything looks nominal. 
Everything really looks great. Okay, I guess - - 

SC - - looks good to us, too. 

CAPCOM Good show. And I guess there's nothing 

else down here. Would you like me to hum to you? 

SC Tony, even that won't keep me awake. 

CAPCOM (Laugh.) Oh yeah, it would. I'll see 

ya'll on the moon - - I've got a day off tomorrow. 

S C Go o d s h ow . 

SC Okay. Sounds good. See you tomorrow. 

CAPCOM Roger. 

SC Good night. 



APOLLO 16 MISSION COMMENTARY 4-18-72 CST 23:07 GET 59:12 MC-209/2 



PAO This is 

in the process of completing 
crew before saying good nigh 
Moon's sphere of influence. 
Spacecraft at an altitude of 
the Moon and traveling at a 
and that velocity is increas 
sphere crossing was 59 hours 
59 hours 24 minutes, this is 



Apollo Control. While we were 
those last few items with the 
t, Apollo 16 crossed into the 
and we're now showing the 

33,680 nautical miles from 
speed of 3,482 feet per second, 
ing. The time again of that 
19 minutes 45 seconds. At 
Apollo Control Houston. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k ! \Z j 11 CST 23:20 GET 59:25 MC-210/1 



PAO This is Apollo Control at 60 hours 3 minutes. 

At present time we're in the mist of a shift handover in Mission 
Control. Our Flight Director Phil Shaffer is coming on to re- 
place Flight Director Pete Frank. The spacecraft communicator 
on the on coming shift will be astronaut Hank Hartsfield re- 
placing astronaut Tony England. And at present time Apollo 16 
is 32 321 nautical miles from the Moon. Traveling at a speed 
of 3492 feet per second. During this past shift the major 
activities for the crew included another activation and check 
out of the lunar module. At 53 hours 28 minutes Duke and Young 
transferred into the LM and switched over from command module 
power for that vehicle to the LMS . All power systems, activated 
communications equipment and completed some general housekeeping 
activities aboard the LM. They then returned to the command 
module and all three crewmen donned their pressure garment 
assemblies less helmets and gloves and Duke and Young re-entered 
th = lunar module checking out the procedures that they'll use 
the day of the lunar landing for suiting up and ingressing the 
lunar module. Following this exercise Charlie Duke reported 
that they had some difficulties when John Young attempted to 
close one of the large restrain zippers on Duke's suit. And 
he said when the zipper -- when they tried to get the zipper 
closed across the small of his back that Young had to exert quite 
a iDit of force to get the zipper to close. Later Charley Duke 
reported that although he was not concerned that the suit would 
be confortable once pressurized, there was some concern that 
they might have difficulties getting the suit zipped up when he 
was wearing the liquid cool garment. And this is normally 
worn under the suits during the EVA' s . It was not worn after 
the exercise tonight and Duke suggested that it might be a wise 
idiia to try - - try the suit with the liquid cool garment under- 
neath to make sure that it would be possible to close the zipper. 
And he also raised the possibility of lengthing the suit 
using series of laces which were built into the suit. Now we 
adivsed him to leave the problem where it was for tonight and 
we're going to be looking at it both here in the Control Center 
and in the Engineering Support rooms in Building 45. Also 
among our crew systems people and determine what the next step 
should be. There seems to be no undo concern about the problem 
here. The feeling was that if the suit fit during the time that 
it was worn for the launch, that it would fit prior to the lunar 
landing and the EVA's. However, we will be looking into the 
prablem in more detail and coming up with some recommendations 
for the crew following their rest period. Also on the list of 
activities during this shift the crew ran a check of the equipment 
which will be used in the bistatic radar experiment while in 
lunar orbit. Transmitting S-band and VHF signals which we'll 



APOLLO 16 MISSION COMMENTARY hjl^jll CST 23:20 GET 59:25 MC-210/2 



P AO receive the VHF signal as was received at 

Stanford as it will be during the actual experiment in lunar orbit 
allowing scientist there to calibrate equipment and to determine 
the precise frequencies that the spacecraft equipment will be 
operating on. And there were a number of items from the Skylab 
food which were included in the menu for tonight's dinner. The 
astronauts were evaluating this food both it's packaging and 
ease of preparation. They were taking motion pictures and still 
photos of the preparation and will be providing post flight 
detailed reports on how this operation went. John Young made 
the comment that there were very few casualties and no loss of 
life following the use of the Skylab food. He did comment that 
it took as he put it a lot longer than they had allowed for. I 
think the supposition here in the Control Center was that he 
was talking for about the documentation procedures, the filming 
and the still photography. And we had one minor problem in the 
chlorination of the drinking water supply. This is done in two 
steps. Chlorine is injected using a hypodermic type syringe 
and this device injects the chlorine through a needle and then 
through a diaphragm which then allows it to be inter-mixed with 
the drinking water. This is followed with an injection of buffer 
and Ken Mattingly reported some difficulty in injecting the 
chlorine and he said when he checked the ampule which holds the 
chlorine was broken and he also said that when he tried to 
inject the buffer that instead of buffer going in, water came 
out. Tony England, Capsule communicator on this shift recalled 
having a similar experience prelaunch when he was chlorinating 
the drink water in the spacecraft on the launch pad. And we 
very quickly remedied that situation with a recommendation from 
England that the nut which holds the ampule into the syringe 
be firmly up against the syringe to permit the ampule from 
separating from the needle and allowing water to come out rather 
than buffer to be injected in. Mattingly double checked his 
procedure and tried again and the second time around reported that 
everything went as planned with no problem. Also on this shift 
we crossed this mythical line known as the lunar's fear of 
influence at which point we begin calculating our spacecraft 
velocities and altitudes with respect to the lunar module. 
Also at this point that theoretically the moon becomes the 
dominant force acting upon the spacecraft from a gravity point 
of view and the spacecraft begins to accelerate towards the Moon. 
At that point Apollo 16 was 178 673 nautical miles from Earth 
and 33 821 nautical miles from the Moon. That event occured at 
59 hours 19 minutes 45 seconds ground elapsed time. At 59 
hours 23 minutes or a little less than 1 hour ago, actually 
about 50 minutes ago, we said good night to the crew and we've 
heard nothing from them since. They have an 8 hour rest period 



APOLLO 16 MISSION COMMENTARY klXZjll CST 23:20 GET 59:25 MC-210/3 



PAO scheduled. During that time we will take 

the air to ground line down. We'll be recording any conversations 
should we have unschedule or unexpected conversation with the 
crew. We'll play that back following receipt. And we'll be 
giving periodic status reports. At 60 hours 12 minutes this 
is Apollo Control Houston. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h J 19 / 12 CST 24: 45 GET 60:51 MC-211/1 



PAO This is Apollo Control Houston at 60 

hours 51 minutes since lift-off. We now show Apollo 16 at 
30,683 nautical miles away from the Moon. Velocity now 
reads 3503 feet per second - this velocity relative to 
the Moon. Phil Schaffer is again the Flight Director for 
the White Team of Flight Controllers who are now on duty 
in the Mission Control. As previously reported, the crew 
of Apollo 16 is in their - is in their sleeep period. 
Right now, we expect that Young, Duke, Mattingly will 
be allowed an extra hour of sleep, making the wake-up time 
at 67 hours ground elapsed time. At 61 hours 52 minutes 
into the Mission, this Apollo Control Houston. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY, 4-19-72, CS T 01:45, GET 61:50 212/1 



PAO This is Apollo Control Houston at 61 

hours and 51 minutes into the mission. The crew of Apollo 16 
ccntinulng with their rest period as Apollo 16 continues oncoarse 
toward lunar orbit. We presently show Apollo 16 at 2 8,605 
ns.utical miles away from the Moon, velocity now reads 
3,520 feet per second. Very little conversation on the 
flight directors loop in the mission operations control 
room. One of the items to be decided on this shift however, 
is the requirements for midcourse correction number 4 prior 
to a lunar orbit insertion. If it is decided to do it, 
MCIC4 will be a small maneuver. We are at 61 hours and 52 
minutes ground elapsed time and this is Apollo Control, 
H ci us t on . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY, 4-19-72, CST 02:50 GET 62:50 213/1 

PAO This is Apollo Control Houston at 62 

hours 51 minutes ground elapsed time. Our displays 
mission control now show Apollo 16 26,522 nautical miles 
away from the Moon and traveling at a velocity of 3,540 
feet per second. Meanwhile in the control center we continue 
in our systems monitoring mode as the White flight control 
team continues to maintain their logs and update their 
planning notes for handover to the next team of flight 
controllers. The next team will be on duty when the lunar 
orbit insertion burn occurs. This morning the surgeon is 
monitoring commander John Young's sleep response. He selects 
a different crew member each evening and he reports that 
Young is resting well. We're at 62 hours 52 minutes 
ground elapsed time and this is Apollo Control Houston. 



END OF TAPE 



APOLLO 16, MISSION COMMENTARY, 4-19-72, CST 03:45, GET 63:50 214/1 



PAO This is Apollo Control Houston at 63 

hours 52 minutes into the mission. We now show Apollo 16 
a: a distance of 24, 470 nautical miles from the Moon, and 
traveling at a velocity of 3,567 feet per second. CAPCOM 
Hank Hartsfield has not spoken with the crew on this shift 
yet this morning, however, he will place the wake-up call 
and the wake-up call is now scheduled for a bit over 3 hours 
from this time. We're at 63 hours 53 minutes and this is 
Apollo Control, Houston. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4-19-72 CST 04 : A5 GET 64:50 215/1 

PAO This is Apollo Control Houston, at 

64 hours 51 minutes into the mission. We now show the 
Apollo 16 spacecraft at 24,237 nautical miles away from the 
moon. We've had no contact with the crew of Apollo 16 for the 
past hour nor do we expect contact with the crew for a bit 
more than two hours. Crew wake-up time is now 2 hours and 
8 minutes away. We'll stand by however, and continue 
to monitor our conversations within the mission control center and 
the various displays. At 64 hours 52 minutes ground elapsed 
time this is Apollo Control Houston. 



END OF TAPE 



APOLLO 16, MISSION COMMENTARY k } \^ 1 11 , CST 05:45 , GET 65 : 50 216 



PAO This is Apollo Control, Houston, at 

65 hours 51 minutes into the mission. We now show Apollo 16 
a distance of 20,195 nautical miles away from the Moon, 
and traveling now at a velocity of 3626 feet per second. 
The crew of Apollo 16 can expect their wake-up call in a 
bit over an hour. Our down clock at Mission Control shows 
1 hours 8 minutes remaining until time of wakeup. The 
flight plan for the up-coming day of the crew, is essentially 
unchanged, however, one item is still open, this being 
the decision on whether or not to do midcourse correction 
A. We're at 65 hours 52 minutes ground elapsed time and 
this is Apollo Control Houston. 



EKD OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/19/72 CST 06:09 GET 66:15 217/1 



PAO Apollo Control, Houston at 66 hours 16 minutes into 

the mission. We n ow show Apollo 16 at 19,304 nautical miles aw ay 
from the Moon, and now traveling at a speed of 3643 feet per second. 
Although, we've had no conversations with them our data here in 
Mission Control indicates the crew is awake - waking up on their own. 
We will standby with the air to ground line up to pick up the 
conversations between the crew of Apollo 16 and Capcom Hank Hartsfield, 
should it occur. We're at 66 hours 17 minutes ground elapsed time 
continuing to monitor the Apollo Control, Houston. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/19/72 CST 6:20 GET 66:26 218/1 



SC Okay, Houston. The LM fan delta P is about 

one and the cabin pressure being what it is, I guess that means 
that we really don't have any leakage up there much. 

CAPCOM Roger. Copy. One PSI. 

SC PS ID, Hank. 

CAPCOM Stand corrected. 

PAO Apollo Control, Houston, at 66 hours 

29 minutes. Apollo 16 is now 18,839 nautical miles away 
from the Moon, and now traveling at a speed of 3652 feet per 
second. This is Apollo Control, Houston, continuing to 
moni t or . 

END OF TAPE 



APOLLO 16, MISSION COMMENTARY, 4-19-72, CST 06:39 GET 66:44 219/1 



PAO This is Apollo Control Houston at 66 hours 

47 minutes into the mission. We now show Apollo 16 at a 
distance of 18, 243 nautical miles, this is the distance away 
from the Moon. We now read Apollo 16 ' s velocity at 3,664 feet 
per second. At 66 hours 46 minutes, continuing to monitor, 
this is Apollo Control Houston. 

PaO This is Apollo Control Houston, 67 hours 

ground elapsed time. Our displays now show Apollo 16 at a 
distance of 17,704 nautical miles from the Moon, and we show 
a speed of 3,676 feet per second. We've had no further com- 
munication with the crew of Apollo 16 since that original 
greeting from spacecraft commander John Young. But we will 
continue to monitor, and this is Apollo Control Houston. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY ^119/12 CST 6:57A GET 67:02 220/1 



PAO This is Apollo Control Houston at 

67 hours 10 minutes ground elapsed time. We show the 
spacecraft Apollo 16, presently at a distance of 17 350 
nautical miles away from the earth - away from the moon, 
and traveling at a speed of 3684 feet per second. Mean- 
while in the Mission Control Center, Flight Director 
Phil Shaffer has just decided that a midcourse correction 
number 4 burn will not be required. We're at 67 hours 
11 minutes continuing to monitor. This is Apollo Control 
Ho us ton . 

SO Houston, how would you like to have a 

5 tatus report ? 
CAP COM 
SC 

I mean. 

CAP COM 

SC 

A s ection , Al 
none , ALPHA 5 : 



Okay, we're waiting. Go ahead. 
You're all 85 foot dishes, right? Ears 

Ro ger. 

Alright, Henry. We'll start here on 
22041, ALPHA 3: 6-1/2, outstanding, ALPHA 4: 
27, and 5, ALPHA 5: 7, 10, and 5. BRAVO 1 



15039 BRAVO 3, 5 good, BRAVO 4, none, BRAVO 5, 3725 



BRAVO 1 
BRAVO 6 , 5 and 5 
CHARLIE 4, none, 

CAP COM 
and 7? 

SC 



CHARLIE 1, 2 1075 , CHARLIE 3 
CHARLIE 5, 15 and 15, CHARLIE 
Okay, was CHARLIE 6 just 2 



, 6 good, 
6 , 5 - 5 an d 
entries 5 



7. 



That's affirm. Okay, make that 5 5 and 



CAP COM 

SC 

CAP COM 
antenna switch and 
PAO 

67 hours 18 minutes 



Ro g e r . 

And off the gormet seat. 
Stand by, Ken. We're coming up on an 
we'll lose comm for a few minutes. 
This is Apollo Control Houston at 
into the mission. What you just heard 



was Ken Mattingly passing along the crews biomedical report 
following a convenience format using letters and numbers 
for speed in reporting. For example, A is the Commander, 
B is the Command Module Pilot and C is the Lunar Module 
Pilot. The 6 pieces of data reported on were radiation 
dosimeter readings, food, this is a negative report when 
the crew member followed the planned menu, amount of sleep, 
medication, urine, and water consumed. At 67 hours 19 minutes 
we show Apollo 16 at 17 033 nautical miles away from the 
moon and traveling at a speed of 3691 feet per second. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h/19J12 07:14CST 67:19GET 221/1 



CAPCOM 16, Houston. Apollo 16, Houston. Apollo 16, 

H o us t on . 

SC Okay, go ahead. 

CAPCOM Okay, You're out so far now that when we get 

close to antenna switching we lose COMM there for about a minute 
and a minute and a half and we're ready to copy the menu now, food. 

Okay, menu reporter is sealing a cnp of 
coffee. He'll be with you in a second. 

CAPCOM Roger and the surgeon compliments the 

reporter on the way he reads the report down. 

Yeah, when you've got a college education 
you learn to read boy anything that happened after that. 

Okay, Henry. The Happy Gormet says that the 
Commander well we'll start with meal A. And on the Commander you 
can delete the grits. On meal B we skipped (garble) for meal B 
and then ate it at meal. And on that we skipped the peanuts. 
And for the second meal on the day, John had a grapefruit drink, 
bread with peanut butter, and I guess that's it. 
CAPCOM Okay. 

Okay, on mine you can start on meal A scratch 
the peaches, the scrambled eggs, four bacon squares, grits. My 

meal B, I had the bread and peanut butter, and the grapefruit 
drink. On Skylab meal, I had one of the two rye breads and on 
all this chicken spread no one ate a third of it - we probably 
ate a tenth a piece. And for Charlie he's been good. He eats 
everything. None of us ate the peanuts on the Skylab meal. And 
for the second meal of the day Charlie had an orange-pineapple 
drink with potassium and peanut butter. And you'll be happy to 
know that we shared our peaches with Casper. He ate just about 
as much of them as we did. 

CAPCOM Roger. Copy. That sounds kind of like it 

didn't work out too well. 

There's a lot of peaches still on Casper's 
face I'll tell you that. Like when you open that can you get 
them all at once. 

CAPCOM Charlie you're going to have to work on 

those guys about the grits. 

Grits are good. I can't get them to eat 
them though. They - I sure ate part of John's. Okay Hank and 
maybe I missed it here somewhere but could you give us some 
words on what you plan to do about midcourse 4. 

CAPCOM Okay, no midcourse 4 and I've got a couple 

items of news here, if you are interested in that. 

SC Okay is that general interest news or like 

how we handle our relay setting and so forth. 

CAPCOM Oh, it's just general interest stuff. We're 

coming up on antenna switching. 

SC Okay, we'll catch you after that. 



APOLLO 16 MISSION COMMENTARY h /19 ./12 07:14CST 67:19GET 221/2 



PAG This Is Apollo Control Houston, 67 hours, 

27 minutes Into the mission. As you heard the crew of 
Apollo 16 sounds fresh and ready this morning. The principal 
spokesman for the crew thus far has been Ken Mattingly who 
provided the status reports. We show Apollo 16 at 16,736 nautical 
miles away from the moon. We now show the velocity of Apollo 16 
at 3699 feet per second. At 67 hours 28 minutes continuing 
to monitor this is Apollo Control Houston. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k/l^/ll CST 7:22 GET 67:28 222/1 



CAPCOM 16, Houston. 

SC Houston, you up yet? 

CAPCOM Okay, 16, how do you read? 

SC Okay, Henry. H ow ab ou t i f w e s t op P P C 

right here at this 144 degree pass? 

SC Henry, did you copy that? 

CAPCOM Roger, we copied and we got some flight 

plan updates for you and you can stop it now if you like. 
SC Okay go ahead. 

CAPCOM Okay, repeat no end CC4's required and 

for your information the data there for the UV photos is good 
for an hour after the flight plan time. So there's no real 
rush on that one. If you're ready to copy we'll just charge 
right into these flight plan changes. The first one is at 
70 hours and — 

SC Okay go. 

CAPCOM 70 hours and 40 minutes. We want to write 

in there, "Charge Bat A", and that's for your Information for 
about 3 hours and 20 minutes. 

SC Okay. At 70:40 we'll charge battery A 

and that's roughly going to be in 3 1/2 hours. 

CAPCOM That's affirmative. And at 71:20, we 

want to enter load DAP with the weights and gimbal trim from 
MSFN. And call EMP 509. 

SC Okay at 71:20 we'll load the DAP with 

MSFN weight (garble) gimbals and call EMP 509. 

CAPCOM That's affirmative. The next thing occurs 

at 73:55, at the sextant star check -- want to add in 
parenthesis no VERB 41, manually -- manual only with VERB 16 
N 0 UN 91. 

SC Okay. I've got at 73:55 at the sextant 

star check we'll do no VERB 41 and we'll do it manual with 
16 91 as our check. 

CAPCOM That is affirmative and E COM advises 

you can — 

SC While we're on that, Henry, -- while 

we're on that one, Henry, I didn't see where we've terminated 
509. Do we keep running it all this time? 

CAPCOM That is affirmative. 

SC Thank you. 

CAPCOM Okay. And EECOM advises you can go ahead 

and start that battery charge now if you want to get Charlie 
started on that. And the next thing that occurs at 74:08. And 
there we do the DOO SPS cue card through gimbal drive. 

SC Okay, that's at 74:08. It's SPS cue 

card through gimbal drive. 



APOLLO 16 MISSION COMMENTARY lijl^jll CST 7:22 GET 67:28 111 1 1 



CAPCOM Roger and LOS -- MSFN LOS time will be 

74: 18. 

SC Okay, 74:18 Is LOS. 

CAPCOM Okay, that's the flight plan changes. 

I have some notes now. I don't know where's the best place 
to copy these. I've got about 9 or 10 of them here. Well, 
I'll take it back. I have two notes on the use of EMP 509 
and they read as follows. 

SC Okay, letmegetmyscratchpadoutand 

then I'll copy those first. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY CST: 07:29 GET: 6 7:35 223/1 



EMP 

5 90 

off, 
off. 



that 



SC 

CAPCOM 
509 . 

S C 
running 
CAPCOM 
plus 2 
Thus , 
SC 

CAPCOM 

are concerned 
SC 
SC 

these are things to 

CAPCOM 
sorry I didn't get 
b o 1 1 cm h e re . 

SC 

CAPCOM 
ch eck . Move 
SC 

from 77:58 over 

CAPCOM 
01111. 

SC 

CAPCOM 
that start EMP 509 
SC 

stand the loading the, 
is load a 3 in there, 
on that. 



Okay, Henry. I'm ready to copy your notes. 
Okay. Number 1, the TVC-DAP, is unstable with 

Okay, understand the TVC-DAP is unstable with 



That is affirmative, 
5 seconds, the TVC-inable is 
the platform alinement could 
Okay . 

Okay, and I have some flight plan 
with DOI. The first one occurs at 
Stand by a second. 



and number 2 is at SPS cut- 
de- energi ze d. The EMP is 
be lost. 



chan ges 
7 -- 



n ow 



Okay, Henry 

go into the flight plan. 
Roger. These are flight 
this in order a while ago 



I'm ready. These are comments 



plan changes. Ken. 
It was buried in 



or 



I'm 



the 



thos e 



t o 



there's a group of CSM systems 



Okay, go ahead. 
Okay, at 77:57, 
up to 77:20. 

Okay, we take the CSM systems check and move them 
77:20. 

That's affirmative. Now at 77:50, VERB 48 21101 

Okay, at 77:50 that's VERB 48 21101 01111. 
That's affirmative, and Immediately following 

Okay, Henry. I guess I don't guite under- 

the VERB 48 21101, and the next thing we do 
Could you have someone give me some rationale 



is you. Once 
don ' t pull on 



when 
that 



CAPCOM The difference there. Ken, 

your loading that VERB 48 for the EMP 509, you 
one and activate that DAP. 

Okay, I see what you're saying. All right. 
CAPCOM In other words, we have to get the right DAP in 

there before we do the EMP 509 . The next item is the activities that 
are located between 78: 03 and 78: 08, we want to move back to lust 
following to P52 at 77 : 5 3. 

Okay. How about giving me the first line and 
last line on the block your talking about. 

CAPCOM Okay, that's P30, verify DOI TIG and Delta-V's 

through acquire MS FN OMNI D. Move all that back to just following 



the P52, or landing site orient at 
activities, we want to delete that 
SC Okay, now what 

more changes to this area and then 



77:53. 
VERB 4 8 
I have is 
I'll read 



And in that group of 

- hey, do you have any- 
you what I have sequencelly. 



APOLLO 16 MISSION COMMENTARY 4719/72 CST: 07:29 GET: 6 7:35 223/2 



CAPCOM There's nothing more on that particular page, 

77 through 78 hours. 

SC Okay. Maybe I missed something here, but I have 

not seen this terminate 509. I'm sure we did somewhere before the 
LCI burn and we'll do it again. 

CAPCOM We're going to get to do, on that. Ken, we're 

going to have that on your cue card. I'll got a cue card change 
ccming up for you. 

SC Okay. All right, let me give you what I have 

here then. At 77:20 I do all of the CSM systems check list items 
that are listed now at 77: 58. At 77: 50 we do a VERB 48 21101 01111. 
We start the EMP 509. Then at about 77: 55 , we do all of the step 
which are presently listed at 78:03 down through 78:08. 

CAPCOM And that's with the exception of the VERB 48. 

SC Yes, that's right. With the exception of 

VERB 48. 

CAPCOM Okay. 



E^D OF TAPE 



APOLLO 16 MISSION COMMENTARY htX^^Jll CST 7:35A GET 67: 43 224/1 



CAPCOM Okay, that's all correct. Now, the 

next item is at 78:22 we delete the sextant start-check 
and move it back to 78:15. And it carries the same warning 
as we had before. No VERB 41, manual only with the VERB 16 
NOUN 91. 

Okay, add the sextant start-check at 
with no VERB 41 doing it manually and deleting the start 
check at 78:22. 

That's affirmative and the last item 
18 add do SPS cue card through gimbal 



78:15 



at 78; 



CAPCOM 
for this is 
drive . 

SC 

gimbal drive. 

CAPCOM 
use is the s ame 
those changes . 

SC 

CAPCOM 
card changes 
SC 

CAPCOM 
you load the 
change VERB 



for 



Okay, at 78:18, do SPS cue card through 

Roger, and the cue card that you'll 
LOI and DOT. We're going to read you 



Ok ay . 

16, Houston, I have your SPS burn 
whenever you're ready to copy. 
Go ahead. 

Okay, just as a note here for yourself, 
dap before starting the card, and you do not 
48 after starting E and B 509. We tried to 



indicate that in the flight plan, and I explained that to 
you awhile ago. Okay, first step. At the top of the card, 
the very first item, add E and B 509 called. 

Okay, at the very top of the card, it's 
E and B 509 and called. 

CAPCOM Roger. And down the 5 item where it 

says load DAP, delete that, 

SC Okay, we'll delete both DAP ' s . 

it says (garble) sextant start 
NOUN 91 enter and make the corn- 
only with VERB 16 NOUN 91. 
we delete VERB 41 NOUN 91 and 
VERB 16, NOUN 91. 
affirmative. At 



CAPCOM Where 
check, delete the VERB 41 
ment: no VERB 41, Manual 

S C Ok ay , 

we say no VERB 41, manual 

CAPCOM That's 



the card opposite 
change that to 40 
S C 

utes and minus 6 

CAPCOM 
it says 55 and 5, 
19 . 

S C 

5 to min us 19 . 



the left of 
main bus ties, where it says 54 minutes, 
minutes, and in parenthesis minus 20 minutes 
Okay, we change 54 minutes to 40 min- 
to minus 20. 

Roger, and down a little further where 
we want to change that to 41 and minus 

Okay, we've changed 55 to 41 and minus 



APOLLO 16 MISSION COMMENTARY 4/19/72 GST 7 : 35A GET 67:A3 22U/2 



CAPCOM Okay, on the backside of the card. Let 

me read you the whole thing I want to get in there. Ken. 
So you'll know how to squeeze it. Right after it says 
ACCEPT parenthesis pro, we want to get in there, if glitch 
RHC to stop manuever, VERB 23, NOUN 20 enter 
40 enter, VERB 62 enter, manual manuever to 
you've got to kind of squeeze that in there a 
I'll read It to you slowly now. If glitch 



occurs , us e 
enter, NOUN 
attitude so 
little bit. 
occurs - 

SC 

SC 

CAPCOM 
manuever. Verb 



2 3 



Okay, stand by a minute. 
Okay, go ahead Hank. 
Okay, if glitch occurs, use 
noun 20 enter enter, verb 40 



RHC to 
enter. 



stop 
ve rb 



62 



enter, manual manuever to attitude 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kjl^lll 7:44CST 67:50 GET 225/1 



PAG Apollo Control Houston 67 hours 50 minutes 

into the mission. We're listening to CAPCOM Hank Hartsfield 
pass along flight plan updates to the crew of Apollo 16. 

SC This is - this is after the pro on - gimbal 

test and we're saying that if you get one of these glitches, 
let's use the RHZ to stop the rates. With the medium objection 
to just switching to S CS , while we do the rest of this and that's 
my question. Now I'll read on VERB 23 NOUN 20 ENTER ENTER 
and I have a question there and I got the impression from what 
we have seen in our previous discussion that this wasn't 
restricted just to the middle gimbal - it's a possibility for 
the others. And then a VERB 40 ENTER which will release the 
platform. VERB 62 will take us back. It's not clear to me 
once we've put in NOUN 20 as 0, that VERB 62 is a useful number. 
It seems to me that I must have skipped something here. 

CAPCOM Okay, I am a little puzzled about the 

VERB 62 needles. However on the other item, the reason you 
only need a VERB 23 is that the - that zeroes that CDU which 
is the only one that locks you up in course aline and the 
others will reinitialize when we do the VERB 40. 

SC Okay, I guess my question though is - if 

it can happen in each of them, the only time you do the VERB 23 
NOUN 20 would be in the event that it did lock into the course 
aline . 

CAPCOM That's affirmative. Data was just saying 

you cover all bets when you do this. You don't have to stop 
and think about it. 

SC Okay, but if you had moved off In yaw, it 

seems to me it would be possibly introducing more air. 

PA^O Apollo Control Houston, 67 hours 53 minutes 

into the mission. Apollo 16 now 15,800 nautical miles away 
from the moon and now traveling at a speed of 3723 feet 
per second. Continuing to monitor, this is Apollo Control 
H o us t on . 

CAPCOM Ken, would you state your concern again so 

we've got a clear picture of it. 

SC Okay, maybe I'm off on a tangent. What it 

looks to me like is that if you pick up one of these glitches, 
I'm not sure that the rates are all going to be confined to 
just one axis by the time it stops, and if you then take and 
load register 3 and NOUN 20 to zeroes, you may, in fact, be at 
some other middle gimbal angle than 0. So once you do that - 
I guess that - that has no effect if I do a VERB 40, huh? 
I guess that's - I guess I missed that point. That merely 
gets me out of the course aline. That VERB 40 was initialized. 
Is that correct? 

CAPCOM That's affirmative. The VERB 40 starts 

the whole thing running again. 



APOLLO 16 MISSION COMMENTARY h/lS/72 7:44 CST 67:50 GET 225/2 



S C Ok ay . 

CAPCOM The VERB 23 NOUN 20 gets you out of the 

gimbal lock, if that's the case. 

SC Okay. Now I'm with you. I guess the only 



other thing is that in the event that we have the thing that 
happened the other night and it did course aline there - it 
seems to me that before I do the VERB 40 I would want to fly 
back on SCS to zero middle gimbal angle, is that correct? 
CAPCOM That's affirmative. 

SC Okay. Okay, I think I understand that, 

thank you. 

CAPCOM The concern over using the SCS, Ken, was 

that they were afraid you would introduce a transient - another 
transient in there by the switching. However, if you can't 
do - can't null it out with the R&C, you might be forced into 
S CS. 

SC We're sure going to try. Perhaps once I 

just get the hand controller out of D pin it'll stop, and then 
whatever new additive it has, that ought to hold it, so there 
m£iy be no further i nt r ans ien ts . I'll try that first. 

CAPCOM Roger. Are you ready to go on the changes? 

SC Yes sir. 

Capcom Okay, out to the side there - a little 

arrow I guess the best way to indicate - in other words, between 
rsite high and EMS normal, we want to say terminate EMP 509. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/19/72 CST 7:49 GET 67:55 226/1 



Okay, when I terminate the EMP 509, do 
you want me to write that between rate high and EMS 
to normal? And it looks like the -- I would do the VERB 48 
back to my original values, but it looks like I would not be 
resetting the average deflect. Or do you want that reset 
anyhow ? 

CAPCOM Standby, Ken. 

CAPCOM Ken, the map suggests to do a normal 

terminite as on the procedure they read up to you and that's 
after you finish the gimbal drive checks. That's what it's 
associated with. And following that -- the next item -- 
just prior to 59 minutes -- I don't know how you're going to 
get all of this in there you may have to write it to the 
bottom and show an arrow. At minus 6 minutes tape recorder 
high bit rate record for command reset. 

And he did not want to do that at minus 20? 

Is that affirmative? 

CAPCOM That's affirmative. 

Do you want me to delete that from minus 20? 
CAPCOM Yes, I omitted that, Ken, I was going back 

to that -- back over here at minus 20 we want to delete -- 
scratch through tape recorder high bit rate for command reset. 
And for your info. The reason we've given this 20 minutes 
is in both LOI and DDI that gives us about 10 minutes to watch 
what you're doing, watch the gimbal drive check and if you need 
any help we can give it to you from down here. 

Okay, that sounds like a good plan. 
Okay. You want the tape recorder on at 

minus 6 minutes. 

CAPCOM That's affirmative. 

SC Okay. Go ahead. 

CAPCOM Okay. Following OOXX ECO enter right in 

there be prepared for SCS takeover. 

SC Okay, I got that. 

CAPCOM You ready for the next one , Ken ? 

SC Yes, go ahead. 

CAPCOM Okay. Right after TVC servile power 1 and 

2 off, we want to enter a little comment that says prior to 
trimming NOUN 85, NOUN 20 's should be checked against the 
IMU. 

Okay after TVC servile power 1 and 2 off 
and we'll put a note here that says prior to trimming NOUN 85 
check NOUN 20 against IMU and that's going to read from 
different angles off the FPAI pickoff. 

CAPCOM That's affirmative. 

SC Okay. 



APOLLO 16 MISSION COMMENTARY h/lSjH CST 7:49 GET 67:55 226/2 



bar 



on 



Okay, now I have 
S t an dby . 



changes for your SPS 



Let me read back what I ve got 



starting at the top with 



of the card I've added 



CAP COM 
rules card. 
S C 
here. 

CAP COM 

SC 

a note. Can you 
CAP COM 
SC 

a ;:iote that says 
first step on the 
that. Under the 
VERB 41 NOUN 91. I've replaced that with a note that says 
41 and use manual monitor 1691. I have changes the 
on time from 54 minutes to 40 minutes and that changes 
to minus 20. I have deleted the tape recorder line at 
minutes. I've changed the time 55 to be 41 minus 5 to 
that ' s 



Go ahead. 
On the SPS card, 
read me all right? 
Roger. 

Okay . At the top 



no VERB 48 changes after entering 509. The 

card is EMP 509. I have deleted most of 
foreslde sextant star check I have deleted 



no VERB 
bus tie 
minus 6 
minus 6 
be minus 



19 and 



all the changes I have on the front side 



of the burn card. On the back side next to the proceed after 
the gimbal test option. If the — if we get a glitch, it's 
RHC to stop rates VERB 23 NOUN 20 enter, enter, VERB 40 enter, 
and then VERB 62 enter, manually maneuver to attitude. After 
rate high, and before 59 minutes, terminate EMP 509. At minus 
6 ;ninutes , tape recorder goes to high bit rate record for the 
command reset. At OOXX, an engine cutoff, it's prepared for 
SC3 takeover. At TVC servile power 1 and 2 off, we've added 
a note, prior to trimming NOUN 85 check NOUN 20 against the 
IMU. And that's all the comments I have on the burn card. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kJ19/72 GST 7:59 GET 68:05 227/1 



CAPGOM That's a good readback, Ken and just 

to reiterate that, terminating E and B 509 is associated 
with terminating the gimbal test or ending up on that. 

SC Roger. I can do that anytime after the 

gimbal test is completed? 

CAPGOM That's affirmative. 

SC Okay. 

CAPCOM We'd prefer that termination right after 

the gimbal check. 

SC Yes sir, don't want to get caught too 

late doing that. Okay, Houston. This procedure, it'll 
handle no matter what glitch we get, and I understand that. 
But how about some discussion of the probability of getting 
such a glitch. Is there anybody thinking about that much, 
down there? 

CAPCOM I guess all of us have been thinking 

about it, John, but there is just no way we can predict 
whether it will happen again, or not. I got thinking on 
the thing again, we'll probably never see it again. 

SG Understand. 1 1 ' s ve ry similar to the 

kind of thing that we had happen back in the early part of 
the Apollo program with the CDU' s that would make them 
count different. Is that not correct? 

CAPCOM That's affirmative. 

SC Okay, thank you. 

SC Houston, 16. Ready to copy the SPS 

burn rules update. 

CAPCOM Okay, the reason for these changes 

Charlie is after we watched MC6 and looked at the system 
pressures there, we got some new data, and for your in- 
formation, we're kind of predicting that your nominal 
values are going to be oxidizer 200, fuel 170, for your 
onboard readings. So based on that, we need to change 
these burn rules. And I believe you've already made one 
change to it, is that correct? 

SC Yes, but we got - I can scratch it in 

again somewhere else. 

CAPGOM Okay, on the fuel oxidizer press, where 

you put in 124 oxidizer, we want to change that to 138 
oxidizer, and the fuel goes from 110 to 112. In other 
words, instead of 124 OX, 110 fuel, we want 138 OX, 112 fuel. 

SC Okay, copy. Go ahead. 

CAPCOM Okay, for your fuel oxidizer DELTA P, 

the new rules are: oxidizer greater than fuel by 50 to 
oxidizer greater than fuel by 12. 

SC Now wait a minute, I had 50 OX less 

than fuel last time. 

CAPCOM Okay, but what you had before, I think 

was 35 and 5, is that correct? 



APOLLO 16 MISSION COMMENTARY kjViJll CST 7:59A GET 68:05 111 1 1 



SC Oh, okay. You ' re righ t , 35 and 5 . 

Okay, go ahead again now. 

CAPCOM Okay, the new ones become 50, oxidizer 

greater than fuel to 12 oxidizer greater than fuel. In 
other words, your 35 and 5 rules go to 50 and 12. Both of 
them, though, oxidizer greater than fuel. What we're 
changing is the 35 to 50 and we're changing the 5 to 12 
and changing the sign over there, oxidizer greater, instead 
of oxidizer less. 

SC Okay, what you're telling me, that's 

the limit, 50 oxidizer greater than fuel can be as high as 
50 or as low as 12. 

CAPCOM That's affirmative. Oxidizer greater 

than fuel in both cases. In other words, your range is 
oxidizer 12 to 50 psi greater than the fuel pressure. 
Okay, and on your tight limits. 

S C Ok ay . 

CAPCOM Change the oxidizer to 16 8 oxidizer. 

What you have there is 168 oxidizer, 15 3 fuel, want to 
change that to 183 oxidizer, 15 3 fuel, no change in the 
fuel. 

SC Okay, copy. Tight limits, oxidizer 

has to be greater than 183 and fuel greater than 153. 
CAPCOM That's affirmative. 

SC Okay, Hank. Let me give you an example 

here on this DELTA P. Right now I'm looking at about 170 
fuel and 195 oxidizer. That says that I can go to - down 
to 150 - 140 on the fuel side with a constant oxidizer 
pressure before I reach my limit, or have the fuel pressure 
increase up to 178 before I reach my limit. Is that 
correct? 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY Ml^jll CST: 08:07 GET: 6 8:12 228/1 



CAPCOM J. G. checking. Let him look at it, Charlie. 

SC Okay. 

PAO This is Apollo Control. Shift handover under 

way in the control center here, with Gerry Griffin's gold team 
taking over. There will not be a Change of Shift Briefing this 
morning from the off-going shift. Repeat, there will not be a 
Change of Shift Briefing. 

CAPCOM - oxidizer followed Delta-P at 12. That was 

the answer I got back on that, however, on the example you gave 
I thought you were right with it, except on the second part. It 
looked like to me you need a 12 difference there. I might have 
misread the thing. 

Okay, Al , just looking at my gauges here, I've 
got about 190 oxidizer pressure, and about 165 fuel pressure, and 
for that test to meet a fuel (garble) it could 
be within the limit. 

That's what the rule's say. 
Okay . 

The oxidizer could drop to 177. 
Roger, 
Rog. 

Hank, could we happen to get 
still be with limits on these rules. 
S t an d by. 

Their checking their cal-cards now. They're 
an answer on that. 



I would still 
CAPCOM 
SC 

CAPCOM 
SC 

CAPCOM 

SC 

along wi th , 
CAPCOM 
CAPCOM 

going to call 



go up to 178 and 



a SPS press light 



SC All right, thank you. 

SC Okay, Houston. Pressure equalization valve is 
coming open (garbled) pressure. 

CAPCOM OMNI Alpha, 16. 

CAPCOM 16, G&C advises to use the pressures and not 

the light in regard to the burn. 

SC Rog. I'm just wondering if I'm, should expect 
to see it? 

CAPCOM 
light will come 



you re going 
SC 

an tenn a? 

CAPCOM 
SC 

is c lo s e d . 

CAPCOM 
SC 



to 



That's affirmative. You may. We think the 
on at 202 oxidizer pressure and we're predicting 
be running around 200. 

Houston, would you like to have the HIGH GAIN 



what 



That's affirmative. Flight plan angles. Ken. 
Okay, Houston. The pressure equalization valve 
The CM Delta-P is 2 tenths now. 

Roger, copy. 2 tenths. 

Yea, I think that 2 tenths is what it reads, and 



ever it's equalized. 
CAPCOM Roger, 
CAPCOM And 16, 

tight limit your within 2 
S C Ok ay . 



th at ' s t rue . 
also would like to advise that on the 
PSI on the low pressure side for the fuel. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY liJ19/12 GST: 08:13 GET: 68: 19 229/1 



CAP COM 
CAP COM 



Okay . 
And 16, 



I have your PLSS engine plus 2 block 



data. 



let 



SC Okay, why don't you just stand by on that and 

us get these photos out of the way. 



CAPCOM Will do. 

SC Hey, Hank. Charlie just noticed that we're in 

this moon photo additive, and it looks like the sun is just very, 
very close to being on our line of sight, and it looks like we have 
one of the changes. We've gone in and opened some of these settings 
Could we get a verification that this is the right setup? We can't 
window very well and tell you if we're aboard sitting 



look out the 
on the moon. 

CAPCOM 
take another 



Roger, 
quick scan of 



Ken. This is 
th e s et tin gs . 



a correct attitude. We'll 
16, Houston. Would you 



attempt to bring up the HIGH GAIN. 

SC Okay, you've got reacting now. How does that 

look? 

CAPCOM Looks good, Charlie, and in regards to the photos, 

the PR says the sun will be very close to the moon, but it shouldn't 
be in the field of view of the camera. The settings are good. 

SC Okay, we'll take them as is. 

CAPCOM Hey, Charlie. I've got a message for you. 

Consolidated Jackpines is way up. 



SC 
SC 

CAPCOM 
over now, and I'll 
SC 
SC 

busy day later on. 
CAPCOM 
SC 

CAPCOM 
relax now. You're 
SC 
SC 

CAPCOM 

SC 

away. How's that? 
CAPCOM 
SC 

CAPCOM 
G&N 66 36 3. 
SC 

CAPCOM 
SC 



Great, thank you. 
So is Ch arlie . 



1 6 , Ho us ton . 
see you later 
Okay, Hank. 
Yes , you all 



I'm, we' re going 
on this evening. 
Thank you sir. 
go get some rest. 



to do the change 



It will be 



They're already on the way. 
He 1 lo the re . 

Hello there. Wanted to advise 
in good hands now with the gold 



you that 
te am . 



you can 



Understand the gold team is (garbled). 

Houston, 16. I'm ready for the block data update. 

Say again 16. You're very weak. 

Yea, that's because my mike is about 25 inches 

That's a lot better, Johnny. 

Okay, I'm ready for the block update. 

Roger. Okay, Charlie, it's PER plus 2 SPS 

Wait , 
Okay . 
Okay , 



hold up on them, hold up 
I was on the P37. This 



on th em , Pete, 
is the P30 pad? 



APOLLO 16 MISSION COMMENTARY h/lS/ll CST: 08:13 GET: 68:19 229/2 

CAPCOM This is your abort pad. PER plus 2 abort. It's 

a P30 load. 

SC Okay, go ahead. 

CAPCOM Okay, it's PER plus 2 SPS G&N 66 36 3 plus 121 

minus 014 076 26 14 49 . NOUN 81's plus 21337 plus 11233 minus 21781 
335 116 018. Rest of the pad is NA. Ullage none. Under other, 
number 1 docked manuever. 2 based on LOI REFSMMAT 3, gimbal angles 
on PTC REFSMMAT, roll 263 PITCH 017 YAW 310. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY ^119/12 8:28CST 68:34GET 230/1 



CAPCOM 3, gimbal angles on PTC REFSMAT are ROLL 263 

PITCH 017, YAW 310. 

SC Roger, Pete. 30 pad pericynthion PER plus 2, 

SPS G&N 66, 363, plus 121 minus 014 076 26 14 49 plus 21 337 
plus 11 233 minus 21 781 335 116 081 correction 018. Rest of 
the pad is in A. Ullage is none. The dock maneuver based on 
the LOl REFSMMAT. ON the PTC REFSMMAT the gimbal angles are 
263 017 and 310. 

CAPCOM That's affirmative, Charlie, and the YAW is 



018 
alert 



SC That's affirm, 018. 

CAPCOM Okay. You can go ahead, no sweat on the 



SC Roger. Just going to let it time out. 

CAPCOM Okay, you can go ahead and torque them. 

SC The torquing angles? 

CAPCOM Roger got them, you can go ahead and troque 

th em . 

SC Okay I'll torque th em in 39 . That sure is 

a mighty super little platform, isn't it. 

CAPCOM Yes, second to a sweet. 

S C Ho us t on , 16 . 

CAPCOM Go ahead, 16. 

SC Okay Pete, how about giving us a little 

recap on mldcourse 2 burn as far as what you all saw as chamber 
pressures and interface pressures and how does the old SPS 
look versus the calibrations? 

CAPCOM Roger. Standby. We'll get it for you. 

CAPCOM 16, Houston. I've got the figures on this 

burn that you wanted and I guess I can start out by talking 
about the meter biases to make sure that we're clear on that. 
There is a 15 psl bias on the oxygen tank pressure. It is 
reading high. On top of that there is a meter bias of 8 psi 
which is also high so that our total bias on the oxygen onboard 
pressure reading is about 23 psi high, oxidizer, I'm sorry. 
And on the fuel it's seven low total which is a meter bias. 

S C Ok ay . 

CAPCOM Okay, then with those numbers in mind the 

chamber pressure during the burn was 100 psi and the numbers 
that you should have read onboard prior to the burn were 
oxidizer tank pressure 205 and fuel tank pressure 177 and 
after the burn the numbers you should have been reading were 
197 oxidizer and 170 fuel. In other words, they both dropped 
well, fuel oxidizer dropped 8, and fuel dropped 7 psi during 
the burn. The interface pressures preburn were oxidizer 184 
and fuel 187 and during the burn they were at 168 oxidizer, 
172 fuel and after the burn the interfaces were oxidizer 174 
and fuel 179. 



en:d of tape 



APOLLO 16 MISSION COMMENTARY k/lB/ll GST 9:13A GET 69:19 231/1 



SC Okay, we understand. 

CAPCOM Okay, then with those numbers in mind, 

the chamber pressure during that burn was 100 psi and the 
numbers that you should have read onboard prior to the burn 
were oxidizer tank pressure 205 and fuel tank pressure 177 
and after the burn the numbers you should have been reading 
were 197 oxidizer and 170 fuel. In other words, they both 
dropped - well oxidizer dropped 8 and fuel dropped 7 psi 
during the burn. The interface pressures preburn were 
oxidizer 184 and fuel 187 and during the burn they were 
168 oxidizer, 172 fuel. And after the burn the interfaces 
were oxidizer 174 and fuel 179. All those look good to us. 

SC Roger. We got you. 

CAPCOM Okay, I don't know whether you noticed 

your pressures during the burn. It was a pretty short burn, 
but the oxidizer tank should have read about 205 and the 
fuel tank about 175 during the burn. 

Charlie was watching them. 
Okay . 

Okay, Pete. During the burn, when the 
pressure started down. 



on 



SC 

CAPCOM 

S C 

engine came 
CAPCOM 
It was at 205 
b urn . That's 

SC 

CAPCOM 
figures look real 



the 



Roger, that s what should have happened. 



and 177 preburn and went to 19 7 
oxidizer and fuel respectively. 

Okay, that's what we saw, 
Roger, and I've got to 
That' s 



and 170 post- 



good to them. 



say that's - the 
the kind of per- 



formance they expected. 

SC Okay, now for LOI , when the engine comes 

on, the helium valves open and I can expect the pressures to 
rise and my gauge reading for oxidizer to sit around 200 
and for fuel to be around 175? 

CAPCOM That's 200 on oxidizer and around 170 on 

f ue 1 , John . 

SC 

SC 

CAPCOM 
SC 

together for me on 
while average D is 
of the burn. 
CAP COM 



tion when 
average D 
SC 

average D 
s o me i de a 



- if you 
is still 



Okay, fine. 
Houston, Casper. 
Go ahead, Casper. 

Could you have somebody put a few words 
what happens if the IMU gets course alined 
still on. I'm thinking about at the end 

Okay, you're wondering about the situa- 
get the glitch after the burn but while 
running? 

Yes sir, there's no change of terminating 



before that happens and I'd kind of like to have 
of what I might expect the navigation to do. 



CAP COM 



Roger, we'll get you an answer on that, Ken. 



APOLLO 16 MISSION COMMENTARY kl\^}ll CS T 9:13A GET 69:19 231/2 
SC Thank, you, sir. 

CAPCOM 16, Houston. Can you check for us and let 

us know whether Ken is on the biomed? 
SC Go ahead. 

CAPCOM Is Ken on the biomed? We're getting 

some strange readings? Could be a loose sensor. 

SC It's pretty loose now, it's in my 

po cket . 

CAPCOM It's in your pocket? That might account 

for it. 

SC I'm not ignoring your - Yes, I'm not 

ignoring it, I just haven't had a change to stop and put 
it on yet. I'll get to it first chance I get. 

CAPCOM Roger. That's fine. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/19/72 CST: 09:27 GET 69:32 232/1 



S C 

CAP COM 
SC 

CAPCOM Stand 
getting a noisy signal on 



Houston, over. 
Go ahead. 
How 's 



This is 16, over. 



S C 

SIM bay door jet 

CAP COM 

SC 

CAPCOM 
mane uve r . 

SC 

the light switches 
CAPCOM 
SC 

list an d I ' ve got 



your BIOMED look now? 
by a minute. We'll look, 
the BIOMED, 16. 
Okay, Houston. We're maneuvering 
attitude now. 

Roger, covered. 
Don, how do you read me now? 



We're still 



to the 



Read you loud and clear. Yea, we copied your 
Okay. Rog, I had to switch back to the (garble) 



I' 11 



and it has 
c on cur an ce , 

CAPCOM 

CAPCOM 
p owe r , 

SC 

pan camera power 

CAPCOM 
have any pan 

SC 

list says to 
on , th e OP TS 
switches are 

CAPCOM 
power on and 

S C 

good. Back 



just isn t working out, 
Ro ge r . 

Okay, we're going through the SIM 
here a list of verifies and on page 



SMAC power on it, and we haven't been 



door jet check 
1-7 step 10, 



go 



ah ead 
St an d 
Okay, 



and turn 
by one . 
Cas pe r , you 



on it. Wi th your 



It on n ow , 



on 



came ra 



can go 
Hous ton , 
Stand by a minute 



sir 



ahead and turn the 
I'm ready to put the 
Caspe r we don ' 1 



Thank you 
the power. 
Okay, 16. 
data yet . 

Okay, I have't put the power on yet. The check 
stand by for mission in cue. We have the data system 
TV is SCI and we have SMAC power on. Pan camera 
in stand by and off. 

Okay, Casper. You can go ahead 
we'll cue you when to go to boost. 

Okay, powers coming on on mark. 

to gray. 



and turn the 



Okay, Casper. 



Barber poles 
You' re 



CAPCOM Roger, have it 

came ra to boost. 
SC Okay. 

PAO This is Apollo Control. Coming 

scientific instrument module BAY DOOR JETTISON, 
minutes — 14 minutes, that is. Present velocity is 3,872 feet 
per second every increasing, relative to the moon. The current 
height altitude 11,618 nautical miles. Standing by for the SIM 
door jettison. 



p an 



our 



up 
in 



go for 



on SIM b ay , 
about 10 



b ay 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY t\]\^lll 9:45CST GET69:51 233/1 



S C 



over. 



CAP COM 
S C 

CAP COM 
b us es . 

S C 

go ahead and 
CAP COM 

SC 

2, jett. 
SC 

CAP COM 

jet t. 

Sc 

CAP COM 
SC 

CAP COM 
SC 

It goes . 

CAP COM 

S C 

changed much 
CAP COM 
PAG 

referred to 
SC 



give 



Okay, Houston we go for SIM DOOR JETTISON 

Stand by. 
Okay . 

16, we're standing by to arm the SIM power 

Okay, I was going to hold up on that. I'll 
you a logic power to jettison at this time. 
Ro ge r . 

Here comes logic power jet 1 jett jet number 



Okay, they're armed. 
Roger, we saw them armed, 



We're go for door 



Okay, understand GO for DOOR JETT. 
That's affirmative. 
Thirty seconds to door jett. 
Roger, thirty seconds. 
10, 9, 8, 7, 6, 5, 4, 



3, 2, 1 JETT. There 



Roge r . 

Okay, the door went, 
from what we could tell. 
Roger. Got it . 
This is Apollo Control, 
by someone on Apollo 15 - 

We can watch it spinning. 



I don't think anything 



The SIM bay door 



out both the center 



window and Charlie's window, and it's quite a sight everytime it 
comes around, the bright side front really flashes. 
CAP COM Roger. 

PAO SIM bay door was referred to by someone on 

Apollo 15 as the world largest lens cap. At the time of jettison, 
the spacecraft was 11,142 nautical miles out from the moon, 
approaching at a velocity of 3,896 feet per second. 

SC Okay, Houston that was a pretty good bang. 

CAPCOM Roger. 

SC The reason it was is on account of we're 

standing around here in our underwear, you know. That is 
helmets and gloves off. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY i\ 1 19 j 12 CS T 9:55A GET 70:01 234/1 



s o und 



of it was about half 
in the LM and the 
reg - the pressure 



S C I gues s th e 

of what you hear when the - when you're 
CMP ' s in here and he hears the pressure 
relief valve closed on him. 

CAPCOM Roger. 

SC The cabin repress valve, that is. 

SC Okay, Don, All of the SIM bay config- 

urations have been completed if you want to take a look at 
the data and see if there is anything that looks funny to 
you, I can re check it. 

CAPCOM Okay, Casper. Stand by 1 and we'll take 

a look. 



SC 



Okay, and we're going to P52 attitude 



n ow 



us 
i t 



CAPCOM Roger, copy. P52 attitude. 

SC Okay, the door is rapidly receding from 

and it's certainly hard to tell how far away it is, but 
1 plenty far away, certainly no recontact problem. 



CAPCOM 
looks ok ay . 
SC 
SC 

about 15 percent, 
remaining . 

CAPCOM 

SC 



Roger, counted. And Casper, the SIM bay 



Roger, thank you. 
That's a good start, 
we're reading magazine 



And, we used only 
bb, 85 percent 



Magazine BB 85 percent. 
Houston, 16. Our LM CM DELTA 

valve is open. 



is .2 and the pressure equalization 
cryo systems are configured. 

Roger, 



Our 



i f 



ACCEPT 



CAPCOM 
CAPCOM 
you'll go 

SC 
S C 

CAPCOM 
G&N 66314 plus 121 
02 19 7 minus 02522 , 



copied. LM CM DELTA P .2 



16, we ve got an LOI preliminary pad and 

we'll uplink data. 
Okay, going to ACCEPT. 

Houston, 16. Go ahead when you pad. 
Roger, 16. It's LOI preliminary, SPS 
minus 014 , 074 , 2 82563 minus 27808 minus 
ROLL is all zips, PITCH 001, YAW is all 
zips. Noun 44 is 01700 plus 00583, 28008,614, 27935, sextant 
star 16, 2429, 271. The rest of the pad is NA, set stars 
Sirlus and Rigel 132, 196, 006, ullage none, other LM weight 
36, 2 87 , single bank burn time 628. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4719/72 CST: 10:22 GET: 70:28 235/1 



SC Okay, Houston. On the P30 pad read-back, 

preliminary LOI SPS G&N 66314 plus 121 minus 014 074 282563 
minus 27808 minus 02197 minus 025 2 2000001000 01700 plus 00583 
2f;808 614 27935 162429271 Sirius and Rigel 132196006 . No ullage. 
LM weight 36287 single bank burn time 6 plus 28. 



at 



CAP COM 
28008. 
SC 

CAP COM 
CAP COM 
SC 

CAP COM 
CAP COM 



Charlie, let's check Delta-VT. It should read 



Okay, 28008. Thank you. 
Roger, that stands correct. 
16, you can have the computer and back 
Roger. Back to block, Houston. 
Roger. 

And Casper, Houston. We haven't forgotten 
qtiestlon about what happens if the glitch occurs while average 
running. We're still putting together a nice neat summary for 
come up with it later. 

Okay, and I guess it's to tell us what the 
more than anything else and we'd like to know 



are doing 



an d we'll 
SC 

res i duals 
that. 

CAPCOM 
CAP COM 
indicates that 
SC 

BIOMED; Ken's getting suited 
one is it, CPN or heart rate 



to block 



your 
G is 
yo u 



Okay . 

16, we're still seeing intermittent data which 
one BIOMED sensor is probably loose on the CMP. 

Okay, Houston. You've been looking at John's 
up right now with his. Okay, which 
ove r . 



CAPCOM 
A charge. 

SC 
SC 

CAPCOM 
S C 

problem 100 
CAPCOM 
SC 

CAPCOM 
S C 

CAPCOM 
P AO 



to 101.1 



It s EKG, John, 16, you can terminate battery 
Okay . 

Houston, Apollo 16, over. 
G o ahead , 16 . 

Okay, in a minute and 40 seconds, the (garbled) 



Roger, we copy and 



THE CNC says it's okay. 
Sounds good to us too. 
All right. 

This is Apollo Control and 70 hours 
into the mission of Apollo 16. Countdown clock showing 
26 minutes remaining until the spacecraft passes behind 
At the start of the first lunar revolution, with lunar orbit 
insertion maneuver taking place shortly thereafter. The preliminary 
up to the crew by the spacecraft communicator a short 

Insertion burn 



51 minutes 
3 hours 
th e mo on . 



data passed up to the crew by the 

time ago. As the ignition time for the lunar orbit 
at 74 hours 28 minutes 25 seconds. This is subject 
ment. Probably within a few seconds as we get down 
maneuver information which will be passed up about, 
voi ce . 



to some refine- 
to the final 
here comes a 



CAPCOM 



Voice check, 



APOLLO 16 MISSION COMMENTARY klX'^jll CST: 10:22 GET: 70 :2 8 2 35/2 



SC Roger, we're still here. 

CAPCOM Roger, loud and clear. 

PAO The final maneuver pad will be passed up to the 

crew at about 73:20, and at the same time the times for reappearance 
of the spacecraft around the eastern LM of the moon will be passed 
up to the crew with and without a successful LOI burn. There's a 
slight amount of concern about the sun impinging on the SIM bay 
experiments because of the present attitude of the spacecraft and 
the procedure for rolling out of that particular attitude is being 
generated now to pass up to the crew. Get some of the solar heat 
out of the experiments. Standing by for the balance of the 
activities leading up to lunar orbit insertion, this is Apollo 
Control, at 70:53. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 1*119/12 GST 10:48A GET 70:54 23671 



SC Houston, let me read you a note I found 

in the flight plan here right at 38 hours. Over. 
CAPCOM At 38 hours? 

SC That's affirmative. I woke up after 

the first night and I find this note in here from Ken. It 
ss.ys: John, we have had some sort of IMU or CMC hardware problem. 
Right after you went to sleep at 38 hours, the platform 
course alined itself, we got it back with an earth-sun 
alinement. Fortunately, MCC had high belt rate all the time 
and we'll work it out tomorrow. Sleep tight. Signed PK. 
And I got up the next morning and I saw that in there, and 
I said, boy that Ken, sure got a funny sense of humor. 

CAPCOM Yes, I guess we would concur with that 

fvinny sense of humor. We had some guys here laugh all night. 

SC Yes, I guess I didn't believe the note. 

CAPCOM I can understand that. 

SC Hello, Donald. Are you still there? 

CAPCOM We're still with you. 

SC Okay, you want to take a look at the 

biomed then? 

CAPCOM Roger, Ken. We're doing that now. 

CAPCOM 16, it looks like the SIM bay temps are 

coming up a little, we may have to change our ROLL angle. 
We'll come up with an angle for you in just a minute. 

S C Ok ay . 

CAPCOM And the biomed data lookes good now. 

SC All right, sir. And just as a curiosity 

item, you might note that it takes - with 2 of us working 
on putting those things on, it takes 15 minutes to put the 
data on and get hooked up. And I guess by yourself it takes 
about 20 cause you've got to use a mirror to see all that. 

CAPCOM Roger. 

CAPCOM Okay, 16. We want you to go to your 

ROLL of 020 with the same PITCH and YAW angles that you have 
now. And you should be able to do the P52 in the new attitude 
and the high gain should stay locked up. 

SC Roger. Okay - (garble) 

CAPCOM 16, you're very, very weak. Say again. 

SC I said, we're there, I guess your 

temp will be stabilizing now. 

CAPCOM Roger, copy. 

SC Don, how about if we go ahead and do our 

P52's now? 

CAPCOM Okay, go ahead, Ken. 

SC Alrighty, thank you. 

CAPCOM Casper, would you verify that you are 

getting a little bit of the DAP and then the EMP 509 before 
you do the P52. 



APOLLO 16 MISSION COMMENTARY hjl^/ll CST 10:48A GET 70:54 2 36 



sc 

CAPCOM 
SC 

sequence there 

CAP COM 

CAPCOM 
a min ute . 

SC 
SC 

Casper in midpunch 

CAPCOM 
load the normal DAP 



That should work right now. 
Roger. Thank you. 

Yes, I guess you saw us get out of 
little, but we're back on now. 
Roger. Understand. 

Casper, held up on your procedure there 
Okay, holding. 

You're pretty good, you stopped old 



Casper, apparently it's 
before you load the EMP 



necessary to 
b e ca us e on ce 



you ve loaded the Saturn dap B, LM weights and that sort 
of thing will not be accepted by the CMC, so we'd like to 



and then 
ab out 



have you take the EMP out, load the normal DAP 
load the EMP back in. We should have told you 
that earlier, I guess. It slipped by. 

Well, that's okay, I stopped and 
wondered about it, and then I decided I couldn't think 
any reason why it wouldn't work the way we did it. Okay 
we're back in seg now. Now we can start with 509. Is 



of 



that 



affirm? 

CAPCOM 

SC 

CAPCOM 



at it 



You've lo ade d 
Th at ' s f i rm. 
Stand by just 



the normal DAP now? 

a minute. We're looking 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kjl9/12 CST 11:09 GET 71:51 237/1 



CAPCOM 
go ahead now with 
SC 

you picked, Don. 

CAPCOM 
should be j us t 

SC 

SC 

of saying 
CAPCOM 
SC 
m s ure 



Okay Ken, It looks real good and you can 
the EMP and the P52. 

Okay will do. I kind of like this attitude 
It's got the old earth in the telescope. 
Hey, wonderful. Flight board says you 
about over Africa. 

This attitude for esthetic reasons. 



sort 



it s orange. I guess that — that's 



Well 
s ome thin g, 

All right. 

Don, would you ask (garble) to take and 
it's a typical thing I just never noticed. I was 
watching the Optic zero the other night and using 1691 is the 
way to do that and here again I'd watched it and at the completion 
of the zero it looks it went to — (garble) register to display 
now and I'm still in zero I just -- thought that was kind of 
curious. Is that a bit size or something? 

CAPCOM Standby one. We'll look at it. 



SC 

counting. Then we'll 
CAPCOM I 

now? 

SC 

It went from 403 up 
CAPCOM 
SC 

CAPCOM 
SC 

Be caus e we ' re 

CAPCOM 

CAPCOM 
you check your 
w e <ik . 

SC 

CAPCOM 
SC 

CAPCOM 
SC 

turns out that 
the s ame . 

CAPCOM 

SC 

that the TPAC's on 
DSKY, The trunnion 



I've taken it out of zero now that's why it's 
go ahead with the 52, 

understand your taking it out of zero 



it started counting 



strip 



It was out of zero when 
to what you see now. 
Roger. 

And that's due to the trunnion 
Roger. 

Don, is there any reason to torque these? 
getting ready to go to an option one. 
Standby a minute. 

Go ahead and torque them. And Ken could 
-- your mike placement? You're very very 

Okay Don. Is that any better? 
Yes, that's some better, Ken. Thank you. 
And we'll torque them at 2310. 
Roger. 

Don, just out of more academic interest, it 
the TPAC's in the -- in the NOUN 91 's are exactly 

Roger. I understand. 

You know what I was going to say is that -- 
the shaft are within the readability of the 
then seems to be off by about 200, which 



I think is a pretty fine agreement. And for the interest 
for some of those people who were talking about these -- 
optics and whether they drift or not, if you can watch 
1691 right now, you'll find it on -- the fold is manual and 



m 



in direct, and you can watch them drift slowly. And at 



APOLLO 16 MISSION COMMENTARY 11:09 CST 71:51 GET IZljl 

SC low rate I'll go to resolve and they drift at 

approximately the same rate — there seems to be some question 
about that earlier, I thought. Thought the guys in the back 
might be interested in that. 

CAPCOM Roger. Copy. Thank you. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/19/72 11:27CST 71:33GET 238/1 



CAPCOM Okay, Casper for your information, although 

we: had you go ahead and load EMP 509 prior to the P52 it was 
not absolutely necessary at that point because you did this 
P52 under SCS control and anytime you are under SCS control 
that TVC relay is not enabled so you really don't have the 
problem. There's no way the glitch can get to you, but we had 
to have the EMP 509 loaded eventually so we figured we'd go 
ahead and let you get it in now. 

SC Okay, I understand that and thank you very 

much . 

CAPCOM Roger. 

SC But with all this stuff for the next few 

days It wouldn't hurt to keep a list of those things down there 
and kind of stay with me on these things, make sure I don't 
g€;t one of them out of sync. 

CAPCOM Roger, we'll follow you. 

CAPCOM Casper, Houston when you've got a few 

minutes to talk we've got a little philosophy philosophy 
on, the use of EMP509 in lunar orbit. 

SC Okay, could you standby just a minute, 

p le as e . 

CAPCOM Rog, will do. 

SC Pete we moved the eat period up a little 

bit and we're getting all the food ready here. 

CAPCOM Roger. This can standby for quite a while. 

SC Okay, I'll come back to you in about 

ten minutes with all that. 

CAPCOM Okay, Ken, good enough. Thank you. 

SC Okay, Don, I've got some free hands now 

and got my little note pad out and I'm ready to listen and 
copy and discuss anything you've got on this stuff. 

CAPCOM Okay, I guess. Ken the first thing we'll 

t£ilk about is the use of the EMP in lunar orbit, that is when 
ycu are alone In the spacecraft. We do not plan to run EMP 509 
continuously primarily because if you do you don't have gimbal 
lock - true gimbal lock protection. What we will do is we 
will run it during programs that involved TVC ENABLE relay 
cycling, except for P52. That means that we will run it for 
SI'S burns and you already have the procedures for LOI and DOI 
ar.d for other burns the procedures will stay the same except 
that we may change the time sequences for doing some of the 
items. We will also run the EMP509 for P24 and for rendezvous 
and we're having MIT verify the compatibility at the present 
time. We'll come back to you on those with more details later. 
Dviring P52 with a P20 option 5 our current procedures call for 
going CMC free. Instead of doing that what we'll do is we'll 



APOLLO 16 MISSION COMMENTARY h /19 111 11:27CST 71:33GET 238/2 



CAPCOM go to this spacecraft control S CS , put the 

rate switch high, and B-mag mode rate 2 and that way the rate 
damping level is below your orb rate and so your SCS, as far 
as control is concerned, will be equivalent to CMC free. How- 
ever, by going to SCS control - if you want to check back on 
that list of set and reset conditions you'll have it. By going 
to SCS control we eliminate the possibility of getting this 
grid. 

END OF TAPE 



APOLLO 16 MISSION COMMENTARY hJlS/ll CST 11:50 GET 71:56 239/1 



Okay, would you say again how we're going to 
Normally, P20 option 5 we will not use 509, is that 



That's affirmative. 



We will not use 509 during 

we will 



SC 

handle P20. 
c or re ct . 

CAP COM 
P20 option 5. 

SC Okay, and when we come to do a P52 

siiill not use the option, for the 509, we're going to go to SCS 
control and use the rate high and max deadband. Is that correct? 

CAPCOM Okay, rate high and max deadband is okay, but 

the G&C tells me your really, that the deadband you don't need 
to go to max. It's kind of inmaterial which possltion you put 
that switch in. You do need the rate switch in high and you need 
B mag mode rate 2. That way you don't have an attitude control 
situation, you have a rate control situation but the level is 



hi gh 
w:: 11 



enough that it s well above the orb rate and so the SCS 



be equivalant 
SC 

CAPCOM 
SC 



to going 
Okay, I 
Okay - 
I'll leave 



CMC free, 
understand 



high . 

CAPCOM 
on the P2 4 and 
SC 

CAPCOM 



Roger, 
ren de z vous . 

Okay, your doing 
Ken, there's one 
are going to, at some point in lunar 
switching, like manual and automatic 
would suggest in that case that you 



that, thank you. 
it in dead band then in rate 
and we'll get more details to you 



late r 



good w o rk . 

other comment here. If you 
orbit do quite a bit of optics 
and that sort of thing, we 
load EMP 509 before you start 



p.. ay mg 
SC 

means like in 
low , an d it's 
that the only 



with the optics and take it out again when you're finished. 

Okay, anytime we're doing that, I assume that 
when we're doing the landmark tracking in both high and 
my understandings from the comments we've got now 
time 509 can get me in trouble is if I leave inabled 



That in general - 

And it also looses the automatic 
That's absolutely correct. Ken. 



gimbal stop 
Those are 



Thank you very much, 
little "dope pad" has 



Hey , you 
really come 



during thrusting. 
CAPCOM 
SC 

CAPCOM 
the two cas es . 
SC 

might tell Tom Holloway that his 
in handy. That's super." 

CAPCOM He's sitting 

thumbs up right now. 

SC Charlie just asked that everybody lock the 

doors until he finds his - piece of (garble) 

PAO This is Apollo Control. 72 hours 1 minute 

ground elapsed time. 2 hours 15 minutes prior to the time of 
Apollo 16 passes behind the moon. The begining of the first 
lunar orbit. The crew has moved up their meal period a few moments 



Alright sir, 



here smiling and giving me the 



APOLLO 16 MISSION COMMENTARY 4/19/72 CST 11:50 GET 71:56 



239/2 



PAO earlier, than scheduled in the flight plan, 

and are now having their noon meal. Spacecraft presently 6,322 
nautical miles out from the moon, approaching at a velocity of 
A, 281 feet per second. Continuing to stand by as we approach 
lunar orbit. Maneuver for lunar orbit coming up in a few hours, 
about 2 hours and 26 minutes from now. 72:02, this is Apollo 
Cont r ol . 

SC Don, how about if I put off the skin reshield 

thing for another 10 minutes. 

CAPCOM Stand by one. 

SC Okay, we're going to go ahead and get it out. 

CAPCOM Okay. 

SC Shield is off at this time. We'll turn it back 

in 10 minutes . 

CAPCOM Roger. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY M19J12 CST 11:59 GET 72:05 2AG/1 



CAPCOM And 16, I've got a TEI 4 pad if you're ready 

t o copy . 

SC You caught us at desert. 

CAPCOM Roger, we'll stand by, 

SC Thank you, Don. 

SC Okay, Pete. Go ahead with you P30 pad. 

CAPCOM Stand by just a minute, Charlie. Okay, Charlie, 

TEI SPS G&N 41534 plus 064 plus 135 083 07 1413 plus 32896 plus 
11501 minus 03276 181 056 022. Rest of the pad is NA. Set stars 
Sirius and Rigel 131 071 014. Ullage 2 jet 17 seconds. Under 
other 1, burn undocked, 2 assumes no DOI, 3 assumes landing site 
REFSMMAT, 4 with LOI REFSMMAT roll 179 PITCH 183 YAW 014. 

SC Okay, Houston. TEI 4 is SPS G&N 41534 plus 

064 plus 135 083 07 1413 plus 32896 plus 11501 minus 03276 181 056 
022. Sirius and Rigel 131 071 014. 2 jet 17 seconds. 1 is burn is 
undocked, 2 assumes no DOI, 3 landing site REFSMMAT, 4 LOI REFSMMAT 
179 :.83 014, over. 

CAPCOM That's affirmative, Charlie. 

SC Uppedes 6 to 8 here, looking through the telescope 

earth is sure apparent that we live on a pretty planet. The colors 
are just such - lot more vivid than any of the photographs. 

CAPCOM Roger, we understand. We were just enjoying 

some of the beauties of earth ourself. 

SC Nobody new serving coffee, uh ? 

CAPCOM That's affirmative. 

SC We're wise to you new people. 

SC How many pots has the moker gone through already? 

CAPCOM We'll have to get you a count but Jerry says it's 

a nev? record. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h/l^/ll 12:24CST 72:30GET 241/1 



CAPCOM 16, Houston. I've got a map update, rev 

it's about 73:20 in the flight plan and also I've got some 
answers to Ken's earlier question about this glitch and what 
if it occurs following a burn. 

SC Go ahead. 

CAPCOM Okay, map update rev 1, LOS 074 1741 180 

074 31 39. AOS with LOI 074 50 05 without LQI 074 42 08. 

SC Okay 074 17 41 074 31 39 074 50 05 0 74 42 

CAPCOM That's affirmative. Okay, now Ken on this 

other question, as we understood your question you are concerned 
about what happens after 2.5 seconds after the burn when you 
switch back to the RCS DAP and cycle is relayed. What happens 
if you get the glitch and it looks like there are two cases. 
Either you get a yaw glitch of sufficient magnitude to put you 
into coarse aline or you get some kind of glitch that could be 
in roll, pitch or yaw but does not put you into coarse aline. 
If you go into course aline, the nab is no good, and the 
NOUN 85 ' s are no good and in that case we'd 
G 



de gre es 
08, 



ave rage 



good and in 
as soon as possible 



by 



not in course aline, 
still no good. 

SC 

CAPCOM 
SC 

it's only a problem 
CAPCOM 
SC 

CAPCOM 
flight plan 
get these in 
today . 

S C 

CAPCOM 
page there, we want 
SC 

CAPCOM 
the load NOUN 89 . 
SC 

CAPCOM 



cas e 
exiting 



like you to exit 
the program. If you're 



the nab is good but the NOUN 85 ' s are 

Okay. Okay, we've got you. 
Ro ge r . 

I particularly (garble) there 
for recording purposes anyhow. 
Roger, that's correct. 
Okay, thank you very much. 
16, Houston I've got 3 items to go in 
at about 79 : 29 is the first one, and if you can 
that will finish up the flight plan updates for 



xs no trim 



the 



Okay, press on. 

Okay, at 79:29 right at the bottom of the 

to add load EMP509 and at 79 - 

I had over behind load NOUN 89. 

That's affirmative, after, it should follow 



Okay, I've added load 
That's affirmative. 



509 after load NOUN 89 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h 111 GST 12:34P GET 72:40 242/1 



Okay, I've added low 509 after low 

That's affirmative. And at 7938, we 
the verb 48 there and that's not associated 
That's simply because that's redundant, 
in that DAP configuration. 

Ok ay . 

And at point 7942, right after the 



P24 
got 



is completed, 
some more? 



I've got them 



SC 

noun 89 . 

. CAP COM 
want to delete 
wiLth the 509. 
You're already 
SC 

CAPCOM 

mispent update block there, add terminate EMP 509 after 
P2 4 completed. 
SC 

Now let me - is 
CAPCOM 
SC 

wh e re 

about 79 and 29-1/2 
d€;leted the verb 48 
got terminate 509 

CAPCOM 

SC 

SC 

to take some pictures or something, can we stick 
zine November-November, I can't tell right now what that's 
scheduled for or shall we use magazine victor? 

CAPCOM Stand by, we'll let you know. 

SC Thank you, sir. 

CAPCOM Our test period November-November looks 

pretty low on the pad, you should go to magazine victor. 
SC Thank you. 

CAPCOM 16, Houston. We've got a couple more 

words on the LM paint peeling problem. Apparently, it has 
been duplicated now, in a vacuum chamber, and it does not 
appear to be any kind of problem 
con ce me d. 



Okay, terminate 509 after 
that the last one or have you 
That's all of them. 

Okay, let me read them back to you 
to make sure I have it all right. At 
on the page, I've written load 509. I 
which occurs at 7938 and 7941-42, I've 
after P24 is completed. 
That's correct. Ken. 
Okay, thank you. 

And Don, on this first REV, if we wanted 

can we stick with maga- 



SC 



n ow . 



CAPCOM 
just the paint 
SC 

start into the 
CAPCOM 
SC 

is about to go off 
CAPCOM 
SC 

CAPCOM 
SC 

de ere as in g . 
CAPCOM 
SC 

with the nitrogen 
CAPCOM 
SC 
SC 

CAPCOM 



Well, that's 



It' 



as far as the mission is 
fine to hear. Thank 



you 



it's 



Roger, 
itself. 

Okay. Don, we're getting 
secondary glycol lub check. 

Okay, we're ready to follow. 
Okay, the secondary cool lub pump 



nothing leaking. 

ready to 



Roger . 

(garble) on the secondary lub. 
Roger. 

Okay, and we see the on-led temperature 
Roger. 

Houston, 16. Are you all satisfied 
pressures on the SPS? 
That's affirmative. 
Thank you. 

Houston, LM's CM DELTA B is ,2 
Roger. LM CM DELTA B .2. 



again , 



APOLLO 16 MISSION COMMENTARY 4/19/72 GST 12:56 GET 73:02 243/1 



S C Hous t on , 

(garble) it out of window 1, 
shine. It is really pretty. 

CAPCOM Roger. 

SC It's really 

you know you can see all of the 



I just got my head 
and we have a half 



unlocked and 
moon in earth 



(garble) , you can see all the, 
prominent features and little 



sharp craters like, I think I'm looking at Kettler, it 
there in the middle of the mare. It's just beautiful, 
that's all earth shine. 

CAPCOM Roger. 

SC Anditjust,it's 
window. And I've got my hand no more 
You know on the dark side you can see 
think the reason I can see it is that 



s out 
And 



like two thirds of the 
than 6 inches from it. 
a big dark DISK and I 
it's the solar corolla 



that's illuminating around the back side, and I can see a star 



within, well, 

CAP COM 

CAPCOM 
really the moon 

SC 



degree of the Moon's disc. 

that's 



it s maybe within 
Ro ger . 

Could we get the LMP to confirm that 
and not the earth you're looking at. 

Hey, babe, this is really the moon. 



It 



the 



most awe-inspiring sight I've ever seen in my life. Looks like 
the door that just hung out there in the middle of blackness. 
It's really beautiful, Pete. 
CAPCOM Rog. 

SC And you can make out all the features on the 

thing. I can see (garble) you can see up into the (garble) in 
the basins in there, you can even see the outer rings of Oriental 
in the, you can't see the basin itself, but you can see it's outer 
rin gs . 

CAPCOM Sounds beautiful, kids. 

SC And now looking at our present orientation, 

I can tell that our new attitude will be perfect for LOI. 
CAPCOM Roger. 

CAPCOM Ken, just for your information the reading 

that you got when you zeroed the OPTICS on the NOUN 91 sequence 
was considered normal, and it's like a single bit or less than a 



single bit error 
this EMP 509 has 
ren dez vous . 

SC 

SC 

Could you tell me 

CAPCOM 

SPEAKER 
the (garble). 

CAPCOM 

SC 

SC 

CAPCOM Roger, 



, and the other thing I wanted to pass 
been verified by MIT for use with P24 



Okay, thank you 
Don, where do I 
if it's better to 
S t and by . 

If you dial channel 



waste the 2 frames 
use the FF or TT? 



on was that 
and during 



of BHBW? 



6 you can see a plot of 



Magazine TT, Ken, 
We copy . 

Okay, I'm up to 3 exposures on magazine TT, 



APOLLO 16 MISSION COMMENTARY 4/19/72 CS T 12:56 GET 73:02 243/2 



SC Houston, 16. Do you have any objections to 

our going to the burn attitude now? 

CAPCOM Stand by a minute- 

SC Was that affirmative or negative, over? 

CAPCOM Stand by one. 

CAPCOM 16, give us POO and ACCEPT and we'll give you 

your uplinks and then you can maneuver. 
SC POO and ACCEPT. 

CAPCOM Roger. 

SC Okay, Houston, the reason we would like to 

go now is it looks like to me you can't get there without going 
through glmbal lock, but we want to see what the DAP wants us to 
d o . 

CAPCOM Roger, understand. 

CAPCOM Okay, 16. You can start maneuvering and we'll 

help you watch the gimbal lock situation, and I also have an LOI 
pad whenever you're ready to copy. 

SC Go ahead, Pete . 

CAPCOM Okay, LOI SPS G&N 66314 plus 121 minus 014 

074 282722 minus 27816 minus 02196 minus 02562 000 001 000. NOUN 44 
i;3 01700 plus 00583 28020 614 27947. Sextant star 16 2429 271. Rest 
oE the pad is NA. Set star is Sirius and Rigel 132 196 006. Ullage 
none. LM weight 36287. Single bank burn time 628. 

SC Okay, we copy LOI SPS G&N 66314 plus 121 minus 

014 074 282722 minus 27816 minus 02196 minus 02562 000 001 000. 
01700 plus 00583 28020 614 27947. 162429 271. Rest of the PAD is 
NA. Sirius and Rigel 132 196 006. No ullage. LM weight 36287. 
Single bank burn time 628, over. 

CAPCOM That's affirmative, Johnny. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h / 19 1 12 1:19CST 73: 25 GET 244/1 



CAPCOM 


OMNI DELTA 16, OMNI DELTA. 




CAP COM 


16, Houston, how do you read? 




S C 


I have a fiveby here In OMNI 
Roger. You're at fiveby. 16 


DELTA. 


CAPCOM 


, H o us t on , 


vo i ce ch e ck . 






S C 


Roger, fiveby Pete. 




CAP COM 


You're at loud and clear. 


Charlie . 


s c 


Okay, we're going into this s 


extant star 


che ck . 




CAPCOM 


Roge r . 




SC 


(Garble) right in the middle 


there , Ho us ton 


CAPCOM 


Roger, very good. 




CAPCOM 


16, would you stow the high g 


ain antenna 



p 1 e as e ? 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 1:51CST 73:57GET 245/1 



CAPCGM 16, you are go for a LCI, 

SC 16, roger. Go for LOT. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/19/73 GST 2:02P GET 74:08 246/1 



SC 

drive check. 
CAP COM 
SC 

ch e ck , w e ' re 
CAP COM 

SC 

CAP COM 

SC 

CAP COM 
See you on the 
SC 
PAO 

spacecraft has 



Houston, we're preparing for the glmbal 
Ro g e r . 

Okay, we've completed the gimbal drive 
now going to terminate 509. 
Ro g e r . 

Okay, 509's out of there. How's it look? 
Looks real good, 16. 
Okay . 



re a couple minutes from LOS 



16, we 
next p ass . 

Okay, we'll be there. 
This is Apollo Control. Apollo 16 
passed behind the moon 2 seconds early accord- 
ing to the loss of signal clock in the control center here. 
To review some of the upcoming numbers with the lunar orbit 
insertion manuever, ignition time will be at 74:28 - 74 hours 
28 minutes 27 seconds ground elapsed time - about 10 minutes 
from now. The total DELTA V, or velocity change, will be 
2802 feet per seconds - feet per second in retrograde. Apollo 
16, at the end of the burn will be in a lunar orbit measuring 
58.3 nautical miles pericynthlon and 170 nautical miles in 
apocynthion. Total burn time with the 2000 pound thrust - 
20 000 pound thrust service propulsion system engine will be 
6 minutes 14 seconds. With a successful lunar orbit insertion 
burn, the spacecraft will be acquired again by the Manned 
Spaceflight Tracking Network at a ground elapsed time of 
74 hours 50 minutes 5 seconds, but in the remote chance that 
there is not a burn - no ignition for some reason, the time 
without a burn would be 74 hours 42 minutes 8 seconds. The 
estimated impact time for the S-IVB third stage of the Saturn 
5, which propelled Apollo 16 on the way to the moon. That 
impact time now is 75 hours 0703, and because of no tracking 
available over the last day or two, this is an estimate based 
on last predictions. It will not be within the field of view 
of the spacecraft even though they will be coming around the 
front side of the moon at that time. It will be over the 
spacecraft's horizon. The seismometers from the earlier Apollo 
Lunar Surface Experiment Packages left on the Moon by earlier 
missions will be monitored to detect the S-IVB impact, which 
is equivalent to about 11 tons of TNT. Some 29 minutes away 
from acquisition of signal, assuming a nominal lunar orbit 
insertion burn, and 17 seconds away from ignition on lunar 
orbit insertion. Come back up again prior to AOS, or acquisi- 
tion of Apollo 16, as it comes around the east side of the 
Moon. And at 74:21 ground elapsed time this is Apollo Control. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY CS T Q2-,n GET 74 : 33 Ihljl 

PAO This is Apollo Control at 74 hours 33 minutes 

ground elapsed time. The lunar orbit insertion burn, presumably 
still underway at this time having a 6 minute 14 second duration 
an ignition time of 74 hours 28 minutes 27 seconds; and if 
the burn is successful completely normal, the spacecraft will 
come around the east rim of the moon in 16 minutes 30 seconds. 
That would be at a ground elapsed time of 74 hours 42 minutes 
8 seconds. However, if for some reason, the burn is not successful 
or we have no ignition on the service propulsion system engine, 
the spacecraft will reappear much sooner at about 8 minutes from 
now, or at ground elapsed time of 74 hours 50 minutes 5 seconds. 
To repeat again the predicted S-IVB impact time, 75 hours 
07:03. One of the large television rear projection Eidaphor 
machines, it does carry the seismometer trace from one of the 
earlier Apollo Lunar Surface Experiment Packages, and the flight 
controllers here in the controls room will be watching that with 
interest, as we approach the impact time. At 74: 34 and returning 
at the no-burn AOS time in some 7 minutes, this is Apollo Control. 

END OF TAPE 



APOLLO 16 MISSION COMMENTARY CST 2:35 GET 74:41 248/1 



PAO This is Apollo Control at 74 hours 41 minutes 

ground elapsed time. Less than a minute away from the time at which 
the spacecraft should come around the corner of the moon assumming we 
had not a successful lunar orbit insertion burn. The acquisition 
time with the normal burn would be at 74 hours 50 minutes 5 seconds 
some 8 minutes 8 seconds away from this point. Mark. No noise on 
the down link. Apparently the spacecraft did have a successful 
burn. To repeat the acquisition time, with a successful burn 
74 hours 50 minutes 5 seconds. At 74:42 ground elapsed time, this 
is Apollo Control. 

PAO This is Apollo Control less than a minute away 

from acquisition of signal from Apollo 16, and it appears at 
least from the timing, that we have indeed had a successful lunar 
orbit insertion burn, which according to pre-burn planning, should 
produce an oliptical orbit around the moon, with a pericynthion 
of 58.3 nautical miles, appocynthion of 170 nautical miles. We'll 
stand by here for the first words from the crew and the burn report. 
Displays being change here in the control center from the earth-moon 
transit display in the center scribing ploter to the lunar orbit 
plotter. Mark-Zero. Let's leave the line up now. 

PAO Confirmed AOS. 

SC Hello, Houston. Sweet 16 has arrived. 

CAPCOM Roger, 16. Copy you loud and clear. 

SO Okay, Pete. Super double fantastic burn. 

If you're ready, I'll give you a burn status report. 
CAPCOM Okay, go ahead John. 

SC Okay, De 1 1 a- TI G w as 0 6 1 5 b urn 6 1 5 . 1 burn time, 

plus 28039 (garbled and heavy background noise) plus .2 minus 0 
minus .1. Delta-VC is minus 5.5. Fuel 376 ox. 371. 150 unballanced 
decreased. Okay, at ignition, we got a momentary SPS light, then 
it went out, during the burn, the oxydizer pressure read 200, the 
fuel side was a little bit low and was about 165 on my gauge. 
After shutdown the fuel side climbed to 170. The oxydizer went 
to about 202 with an SPS light and we still got it, over, 

CAPCOM Roger, we copied everything except the ROLL 

PITCH and YAW which was blacked out by some noise. 

SC Okay, the TRIM attitude, we did not TRIM. 

The residuals were as we gave you after the burn but attitude 
was 005 358 002 , over. 

CAPCOM Roger, we copy. 

SC And it was a slight transient when the second 

bank was lit, but I don't remenber from prievous burns, you might 
look at that data, but it was super. 

CAPCOM Rog, got it. 

SC And it appeared to me that the chamber pressure 

dropped off just as we brought the second bank on. And as you can 
see we're in 170.4 by 58.3 according to the old computer and that 
babe just rifled it right down the line. 



APOLLO 16 MISSION COMMENTARY k 119/12 CST 2:35 GET 74:41 IhBjl 



CAP COM Eighty. 

SC And everybody is looking out their window. And 

right now we're looking right down at crater King, and it's 
just as fantastic as it always has been. 

CAPCOM Roger. 

SC You can see those little dark, those little 

dark, looks like volcanic black spots up in the north sector of 
it, and you can see the central peeks with a varied, very white 
central peeks covered by lighter grey, grey brown material that 
sort of looks like somebody painted it on there with a, with a 
paint brush. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kjl'illl CST 2 : 4 8P GET 74:54 249 /1 



SC Hey there Pete, your first view at 

Tsiolkovsky from our window is pretty - it's a spectacular 
sight - like a marshmellow float - the central peak floating in 
top of a — 

SC Hot chocolate. 

SC It's like 3 guys - they've each got a 

window and we're staring at - at the ground - it's really - 
this has got to be the neatest way to make a living any- 
bodies ever Invented. 

SC Pete, 16 here. Another pretty sight 

we had before burn was the earth set. It was really quite 
a vi ew . 

CAPCOM We're all sitting here listening to you. 

Te 1 1 us abo ut it. 

SC Pete, you got the pan camera's power 

on ? 

CAPCOM Okay, pan camera's power on. 

SC How did the SIVB look? 

CAPCOM It hasn't happened yet, John. It's 

got another 9 minutes or so. 

SC I trust we're not getting there the 

same time it does? 

CAPCOM I trust. 

SC Okay. 

CAPCOM It's going to hit on the southwest corner 

of Rhineholt - 

SC Say again, Pete. 

CAPCOM Tell Ken it's going to hit on the south- 

west corner of Rhineholt. He should know where that is. 
SC I'm sure he does. 

SC Okay, let me get the binoculars out here - 

playing with them. It's pretty interesting - I'll tell you all 
that time spent with Farouk it's sure really going to pay off, 
cause it does look like old home. 

CAPCOM (garble) 

SC Lawn needs mowing and all that 

CAPCOM Okay, Casper, pan camera power off. 

S C Ro g . 

PAG This is Apollo Control, 75 hours 1 minute 

ground elapsed time. Completely successful lunar orbit 
insertion burn, with a duration of 6 minutes and 15 seconds. 
Reported on board measurements on the lunar orbit 58.3 by 
170,4 nautical miles. We'll continue to monitor this first 
front side pass and lunar orbit number 1 at 75 :02 this is 
Apollo Control. 

SC Pete, looking out at the horizon you can 

really tell your in the highlands, the horizon is really jagged 
look in g . 



APOLLO 16 MISSION COMMENTARY M 19 112 CST 2 : 4 8P GET 75:54 249/2 

CAPCOM Looks like coming up on the rockies, huh? 

SC of course, we're starting to come up over the 

flat lands now, over the Smyth Sea, I remember a land mark 
atract down there on Apollo 10, it's still there. You can't 
really tell by looking at it that the Smyth Sea is any, any deeper 
or lower, than the data shows it is. But in the surrounding 
terrain. 

CAPCOM Roger. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k]\.3111 GET 75 :06 GST 3:00 MC-250/1 

SC — craters and Smythll remind me a lot of 

Coral Atoll. They just got the ridges sticking up and the 
bottoms of them up here to be flooded with the same material 
that's in Smy th . 

CAPCOM We're digging out a map now, 16, to take a 

look at — 

SC We're going to get a close-in picture of 

Humboldt, here, as we come up — because we'll probably miss 
it on the next round. 

CAPCOM Roger. 

SC It's really a fascinating crater, the way 

the dark mare has got in — sort of like a path around the 
edges, and there's a fracture pattern running across it, and 
it has some very prominent central peaks that are very white. 
But it has every contrast and color on the Moon. 

CAPCOM Does it? 

SC Boy, those fracture patterns running down 

through it are white — appear to be white layered fracture 
patterns. Makes It look like somebody has drawn them on there 
with a piece of chalk. 

CAPCOM S-IVB is Impacted. 

SC Okay. 

PAO Seismograph traces beginning to show of the 

S-IVB impact at approximately 75:09, ground elapsed time. 

SC Houston, out my window is fine now. We got 

Petavlus with it's central dome of whitish cap dome, and it's 
a fairly subdued crater, and the lineations running into it -- 
the rilles or whatever they are — just like it's shown on the 
map here, 

SC Some of those central domes are exceptionally 

dark, and they have exceptionally dark material running down 
a white surface — you can see that. 

SC With the binoculars we passed over Langreus 

and you can see blocks on the tops of the central peak, and 
some features that probably are there that I just haven't no- 
ticed before in that central feature. You can see an awful 
lot of — looks like a demarcation where the central feature — 
looks like a crack in it -- has a whole ring of craters that 
come in dots that boundary. And then you see some more of those 
little craters up along near the top of the central lineament 
also. You just don't see those kind of things stand out at 
you without the binoculars. 

CAPCOM Roger. 

SC Also say that the binoculars have good power, 

the maximum you can hold in your hand, you got to get yourself 
set up very nicely for it before you start. 

CAPCOM Roger. 

SC And, we're coming up over the Messier A and 

B craters. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/19/72 CST 3:12 GET 75:18 251/1 



PAO This is Apollo Control at 75 hours 8 minutes 

ground elapsed time. Crew of Apollo 16 still 3 tourists in 
their first lunar orbit observing the features of the Moon, 
calling out various craters as they pass over them. S-IVB 
impacted the lunar surface at about 75:09. Signals are still 
coming to the ALSEP, coming out on the recording graph of the 
normal lunar seismic activity made rather straight line up 
until the time of impact and the strokes of the recorder are 
broadening continuously as the seismic waves travel through 
the Moon to the ALSEP site. Some 55 minutes until loss 
of signal remaining in this first lunar orbit. That's 75:19 
this is Apollo Control. 

PAG This is Apollo Control at 75 :20 . Apollo 

16 Commander John Young becomes the first human to go into 
lunar orbit twice, having flown on Apollo 10 which is a pre- 
courser to the landing missions. Apollo 10 mission descended 
to within about 8 miles of the lunar surface and the, that is 
the lunar module did. Jim Lovell has been to the Moon twice, 
but the second trip, the first having been Apollo 8 the first 
manned lunar orbit mission, the second being in Apollo 13, which 
was an aborted mission and coasted past the Moon and, therefore, 
Lovell did not go into lunar orbit on his second trip. At 
75:21 this is Apollo Control. 



END OF TAPE. 



APOLLO 16 MISSION COMMENTARY CST 3:17 GET 75:23 252/1 



SC 

now, central peaks 
terminator looking 
rugged. 

CAP COM 

PAO 



Houston, we're coming up on Theopolus 
in the shadows and as we approach the 
out towards the horizon it really looks 



Ro g e r . 

This is Apollo control. 



Members of the 

orange team of flight controllers under Pete Frank are be- 
ginning to drift into the room for the change of shift hand- 
over at 4 p.m. central time. We're estimating the change of 
shift press briefing in the small briefing room building 1 
press center for 4:00 somewhat earlier than would be normal, 
normally the case, with flight director Jerry Griffin. 

CAPCOM 16, if you will give us a computer and 

go ACCEPT we'll give you a REFSMMAT. 



alti 



it 



S C 

s carp b oy 
CAPCOM 
SC 

admit the lighting 
CAPCOM 
CAPCOM 
SC 
SC 



You ve got it. Just now looking at the 



! well named to this lighting. 
Ro ge r . 

Looks like the walls are vertical, I'll 
exagerates it but that's how it looks. 
Ro ger , copy . 

16, we're finished with the uplink. 
Okay, back to lock. 

In this lighting you can see the crater 
Descartes and it stands out much bigger than you would expect 
because of the low sun angle. And I've had to look at my map 
in order to make sure that was what I was looking at. And the 
material that runs out of it thats in the area, - the things 
we talk about as being the bright reflected area, in this low 
sun angle adds a much blockler and jumbled appearance than it 
does on any of the high sun photographs. 

Ro ge r . 

It looks very 
clinkery cinder 



CAPCOM 
SC 

a clinkery, a big 
scale. 

CAPCOM Roger, copy. 

SC Yeahabig,a 
it's fantastic boy is that rough. 
SC Okay, Houston 



much like looking down on 
field, but on a much larger 



big rounded surface clinkers 



as we look to the west and 



pass the terminator there a couple of degrees past the termi- 
nator there is one bright stot, a peak standing up which is 
westof,westof . . . 

Charlie, your fading out. 
... really high ground. 
Say again. 

Right after you started talking about 
said someting like west stob you faded out. 



CAPCOM 
SC 
SC 

CAPCOM 

p e ak an d you 
ahead, Charlie 

SC 

may be looking at 
through the shadow 

CAPCOM 
END OF TAPE 



this 
Go 



Yes, the general opinion here is that we 
part of the Smokey Mountains sticking up 

Terrific. 



APOLLO 16 MISSION COMMENTARY h/19 Jll 3:26 CST 75 :32 GET 253/1 



CAPCOM 16, FAQ advises you've got some 

extra film on magazine U U that's VHBW and you can use 
i I; for targets of opportunity and you can use the CEX exposure 
graph and stop down one stop from what you get off the 
graph . 

SC Okay, I hear you. 

CAPCOM Casper, on that last transmission as an 

example, Fll for the CEX you should go to F16 to use with 
magazine UU. 

S C Ok ay . 

SC Don, I'd like to verify how we're going 

to do the P52 again now, any ideas that we'll go to place the SCS 
controls into rate high and dead band has been at the 
proper time I'll - I've got the B mags in rate 2, I'll go 
to SCS control then I don't have to worry about loading 
5 0 9 and I'll just go ahead and do the P5 2 and then when 
we're through I can go back to CMC control, is that correct? 

CAPCOM That's affirmative. 

SC All right sir, thank you. 

PAO This is Apollo Control, at 75 39 ground 

elapsed time. Apollo 16 approaching the lunar terminator 
or sundown; in about A minutes. At the present time, the 
crew is conducting a program 52 realignment of the inertial 
mtiasuring unit - inertial measurement unit in the guidance 
system to repeat again, the change of shift press briefing 
with Flight Director Gerry Griffin will be about four 
o'clock central time at the Houston News Center briefing 
room. At 75 39, this Apollo Control. 

SC Hey, Don, we're trying to set up the 

camera for the next terminator at sunrise, and I though 
I understood what you told me about the settings, but I 
guess I don't. Could you run through that again? I guess 
I just as soon have you give me the proper settings. 

CAPCOM Are you talking about this magazine 

UU that I just called up? 

SC Yes sir, the VHBW. 

CAPCOM Roger, stand by. Ken, they're looking 

it up for us right now, in the mean time I'll try to give 
you the rule again, maybe that'll clear it up some. 
You can use that CEX exposure graph that you have onboard 
and take the readings off that - 

S C Ro g . 

CAPCOM - and then simply increase the stop 

number one stop. For example, if the CEX exposure graph 
calls for Fll and you are going to use the magazine UU 
you should go to F16. 

SC Yes, okay. When you used that example 

I thought you meant that specifically, and I couldn't make 
that correlate. Okay. And Charlie says this magazine is 



APOLLO 16 MISSION COMMENTARY Ml'HJl 3:26 CST 75 : 32 GET 



SC HBW instead of VHBW. 

CAPCOM That's affirmative, he's right. 

CAFCOM Casper, for the terminator photography, 

on the next rev we are recommending you go ahead and use 

magazine SS that's Sierra Sierra. 

SC Okay use the one we planned on. 

CAPCOM That's affirmative. 

SC Okay, thank you. 

END OF TAPE 



APOLLO 16 MISSION COMMENTARY k/19Jll CST 15:36 GET 75:42 254/1 



CAPCOM And Casper, the call Omega is in UU, we 
meant to impart to you that you could use that for targets of 
opportunity- 

SC Rog. Okay, thank you. 

CAPCOM 16, put the high gain on auto. 

SC Houston, did you copy our torquing angle? 

CAPCOM Af irmitative. We got them. 

SC Say again, please. 

CAPCOM Af irmitative, we got them. 

SC Okay, Don, one comment I'll try again and 



take a look at the OPTICS when we get out into double umbra, 
but right now in the telescope I can see the stars now, but 
I still can't see star patterns like we looked at Antares and 
you just couldn't see the Scorpion at all. And that may be 
due to the extreme amount of earth shine that is being reflected 
off of the LM. That LM is like looking at it almost in daylight 
and good gosh the Moon looks like you can see every thing on 
there just like it's really bright. 

CAPCOM Right. Okay, Ken, we understand. 

PAO This is Apollo Control, we're ready to 

switch now to the MSG news center briefing room, for our change of 
shift briefing. During the course of that briefing we'll 
be recording air to ground conversations with the crew for 
playback immediately following. At 76 hours 9 minutes, this 
is Apollo Control, Houston. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kl\^lll 16:04 GST 76:10 GET 255/1 



PAO This is Apollo Control at 76 hours 27 

minutes. During our Change of Shift Briefing Apollo 16 
went behind the Moon nearing the end now of their first 
revolution of the Moon. We accumulated a small amount 
of taped conversation with the crew as they went around 
the corner on this first revolution which we will play 
back for you at this time. 

CAPCOM 16, you are about a couple of minutes 

from LOS, everything is looking good and while you are 
behind the Moon, we'll change shift and pick you up on 
the next rev. 

SC Okay, we sure enjoyed it and we really 

appreciate all of the things that you guys are doing to 
get us into orbit here and I don't - that's the kind of 
help that really does it for us, thank you much. 

CAPCOM Roger, thank you. 

PAO We'll be reacquiring Apollo 16 in 

about 30 minutes. At the present time. Flight Director 
Pete Frank is reviewing the mission status with each of 
his Flight Controlers. Our spacecraft communicator at this 
time is Astronaut Hank Hartsfield and our tracking data 
shows Apollo 16 to to be in an orbit with apolune of 169.9 
nautical miles a perilune of 58.1. At 76 hours 29 minutes 
this is Apollo Control. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY i^/l^/ll CST 16:25 GET 76 : 31 256/1 



PAO This is Apollo Control at 76 hours 57 minutes. 

We're now less than 1 minute from the scheduled time of re- 
acquiring Apollo 16. The spacecraft now in its' second re- 
vclution of the Moon and toward the end of this revolution the 
crew will be performing the descent orbit insertion maneuver. 
The flight dynamics officer here in Control center is presently 
working up the final set of numbers for that burn. They will 
be performed with the spacecraft service propulsion system 
engine, at aproximately 78 hours 35 minutes this will be a 
24.1 second burn and will be targeted to place the spacecraft 
In an orbit of about 59 by 11 nautical miles. We expect we'll 
have the final numbers for that maneuver in about 15 minutes. 
At the present time we show Apollo 16 in an orbit of aproximately 
170 by 58 nautical miles and we've Just had the call acquisiton 
of signal so we'll stand by for a call to the crew. 

SC Hous ton , 16 . 

CAPCOM Hello, 16, Houston. How do you read? 

SC Rog. Read you 5 by, Henry. We just got 

the ten thousandth picture of a beautiful Earth rise. 
CAPCOM Outstanding. 

SC This is really someplace. We had a chance 

to watch you get AOS that time. I know we got lots of pictures 
of it but you're going to have to look at one more. 

CAPCOM 16, Houston, Were you trying to transmit? 

We h eard a little noise on the loop there and looks like our 
data was dropping in and out, looks good now. 

SC Negative, we weren't trying to say anything 

Hank . 

CAPCOM Okay. 

SC We just can't find any words everybodys' 

peaking out the window here. 
CAPCOM Good. 

SC We got all the dump completed and we're 

all dumps are secure. 

CAPCOM Copy. 

SC And I got some pictures on the backside of 

Icarus and the and a black of the Sea of Moscow. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/19/72 16:55 GST, 77:01 GET 257/1 



SC 

of Moscow and the 
terminator we don' 
PAO 

lunar surface have 
we heard from John 
the communication 
that we are using 
for communications 
high gain antenna 
a bit. 



Icarus and the black of the Sea 
material to the north of of us at the 
t think we got (garble) though. 

Those enthusiastic descriptions of the 
come from all 3 crewmen. Most recently 
Young and Charlie Duke. The noise on 
circuit at the present time is due to the fact 
one of the OMNI antennas on board the spacecraft 

The crew will be switching over to the 
soon and that should quiet things down 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k 111 GET 77:08 CST 17:02 MC-258/1 



SC 

How do you read, 
CAP COM 

SC 

mode to standby 
CAP COM 
SC 

before, but the 



Okay, 
over . 

Ok ay , 
Ok ay , 
and power 
Roger. 
Hank, 
mos t — to 



Houston, we have you on the high gain, 



I read you 5 by 5. 



H ank , 
ON. 



I m turning the pan camera to 



I'm sure they have been described 
me the most unique craters up here -- 
over now. Her ejecta blanket is 
interior, but with a black rim 



are two that we're just going 
completely white with a white 
to them. 

SC Houston, 16. 

CAP COM Go ahead. 

SC Hey, Hank, how do the SPS data look? 

CAPCOM Okay, we were just talking about that, Char- 

lie. Probably we had a real nominal burn. Our data down here 
shows burn time of 6 minutes 14.2 seconds, which is right on 
the money. And I got a few words on that PC drop. I understand 
that's completely normal for the first dual bank burn, due to 
some helium bubbles that are normally trapped between the ball 
valves. So, that wasn't unexpected for the first dual bank 
burn, you shouldn't see it again. And as far as the SPS pres- 
sure light that came on -- we warned you earlier to expect that, 
duB to the pressure surge of the tank's pressurizing, we -- you 
were right on the 200 PSI limit -- that triggered it. The se- 
cond pressure light you got, which is apparently still on, is due 

to heat soak back into the tank, — ^ » - - . 

SC Okay, fine. 



about the light. Not that we weren 
to tell you what had happened. 



so it's not unexpected 
We passed that word on 



t expecting it, but 



either, 
to you 
just 



CAPCOM 
CAPCOM 
SC 
SC 

CAPCOM 
SC 

ture of, it's a 
and the central 
you'll see that 



Ok ay . 

16, track mode AUTO on high gain. 
Okay. You've got it. 
Houston, 16, over. 
Go ahead. 

That crater Icarus we got the profile pic- 
big round crater and it has real steep walls, 
peak is a little above the crater walls, and 
profile when you get the picture back. But the 



J ^ ~^ ^ J. = uLiau t-iuiixe wiieii yuu gee tne picture DacK. But the 
shape of the central peak is such that the only Earth analog I've 
ever seen that look like it was sort of a shield volcano... I never 
saw anything like that -- now, I'm not saying the whole thing 
is not an impact, but that central peak is really unusual. 

CAPCOM Roger, we copy and we're also through with 

the pan camera -- you can go power OFF on that. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kll9/12 CST 17:18 GET 77:24 259/1 



SC Houston 
daries down here that cross 
there have been a couple of 
across there . 

CAPCOM 

SC 

air borne geologist 
CAPCOM 

step. 

SC 
PAG 

first of the crater 
and second of the 
SC 



apparently this line of secon- 
the mare gives you the impression 
great big chickens been walking 



Roger. 

That was courtesy of 
and chicken farmer. 
Roger, maybe you had 



Charlie Duke our 



better watch your 



I ' m wa tchlng . 

Those last two picturesque descriptions 
Icarus with it's unusual central peak 
chicken tracks were from John Young. 
Hank 



you can tell Farouk that those 
smooth areas we thought we saw around Isadorius 
Capella are indeed uniquely different in texture. They are 



a chance to 
that sounds 



quite smooth. We'll get 

CAPCOM Hey, 
How are your systems checks coming 

SC 

CAP COM 
PAO 

observation was 
has worked very 



play with them later, 
real interesting, Ken. 



Rog, Hank, we've already finslshed those. 
Ok ay . 

Ken Mattingly's reference on that last 
to Farouk Alboz, one of the geologists who 
closely with the crew and particularly with 



Mattingly in training him for the orbital photography and 
recognition of geologic landmarks on the Moon. 

SC Henry, the amount of terminator movement 

one rev is kind of dramatic up here. Last time around 
Descartes just barely showed as a crater, but show very 
dramatically and now it's - as it moves out its starting to 
loose some of the starkness and I'll get a picture of this 
bright zone and it sure looks right now the material that 
is just to the north of the crater Descartes and that stuff 
that we talked about going between Delambre B and Descartes A 
are in fact extensions of the things that go into the Smokey 
and Stone Mountains. They, right now, look like they have 
a very similar texture. 



an d 



CAPCOM 
SC 

P a Imet t o 
CAPCOM 
SC 



Roger, we copy. 

Hank, it sure looks like we can see Gater 
It's almost straight down. 



doesn't look like 

CAPCOM 
ACCEPT we'll 

SC 

CAPCOM 
your map 
SC 



from here 

Does it look like the map 
Well, that stuff 
it did at high sun. 

Apollo 16, Houston, if you will 
uplink state vector and target load. 
You have it. 

Apollo 16, Houston, I have your DOI pad, 
update, and landmark pad whenever you are ready. 

Okay, go ahead with the DOI pad. 



around the outside sure 



give us 



that 



APOLLO 16 MISSION COMMENTARY klX^Hl CST 17:18 GET 77:24 259/2 

CAPCOM Roger. DOI SPS G&N: 41441 plus 187 

minus 071 078 33 4439 NOUN 81 minus 02053 all zips minus ... 

END OF TAPE 



APOLLO 16 MISSION COMMENTARY h J 19 111 CST 17:34 GET 77: 40 260/1 



CAPCOM 53 all zips minus 00 455 000 2 74 000 00585 

plus 00103 02103 024.2 02038 sextant star 22 2048 217 the rest 
of the pads NA. Set stars Sirius and Rigel 131 071 014 4 jetts, 
15 seconds end of pad. 

Okay, copy, DO I SDS G&N 41 441 plus 187 
39 minus 02 03 53 plus all balls minus 00455 
plus 00103 02 103 024. 2 02 038 22 2048 217 
NA. Sirius and Rigel, west 31 071 014, 4 



Good readback, Charlie. I have your map 



SC 

minus 071 078 3344 
000 274 000 00 5 85 
the rest of pad is 
jetts 15 seconds. 
CAPCOM 

update rev 3 whenever you're ready, Charlie, it's 7905 in the 
flight plan. 
SC 

and a land mark 

CAPCOM 
10 25 , land 
SC 

07 8 48 09, 
36 22 . 

CAPCOM 
and I have 
SC 

the changes in the 



mark 



079 



Alright, why don't you give me the map update 

p ad . 

Map 

pad is T-horizon 

Roger, copy. Map update 
10 25, land mark tracking is 



update, LOS 78 23 17, 78 48 09, 79 



79 34 11 



79 36 22. 
of 07 8 23 17, 
79 34 11. 79 



Good readback. 16, the computer is yours 
your TEI 5 pad for the update book. 

Okay, Hank, before we do that looking at 
flight plan here we got to load the VERB 48 



proper DAP and that's to start 509 and then go 
Can we go ahead and stop the maneuver now and 

clear enough things so we can get a P-52 in 



copy that. 



to put in the 
to the P-52. 
will this attitude 
th e re . 

CAPCOM 
SC 

CAPCOM 
che ck . 

SC Thank you. I was worried about getting in 

same problem we get into after undocking tomorrow where 
might take a special angle. 

CAPCOM roger, understand. Apollo 16, Houston, 

FAO says this is a good attitude. 



S t an d by. 

I'm s o r ry I di dn 

Roger, stand by 



min ute 



Ken 



I'll have 



FAO 

th e 
i t 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY Jl3 Jll GET 77: 47 CST 17:41 MC-261/1 



CAPCOM 16, Houston, are you ready for the TEI 5 

pad, yet? 

SC Rog, go ahead. 

CAPCOM Okay, pad follows: TEI - 5 SPS G&N 39838 

plus 061 plus 119 084 314136 981 plus 35252 plus 12473 minus 
00868 182 056 022 the rest is NA set stars Sirius, Rigel 131 
071 014 2 jets 17 seconds other 1 burn undocked 2 assumes DOI 
3 landing site REFSMMAT. 

SC Rog, TEI 5 SPS plus G&N 39838 plus 061 plus 

119 084 314136 plus 35252 plus 12473 minus 00868 182 056 022. 
The rest of pad is NA, Sirius and Rigel 131 071 014 2 jets 17 se- 
conds. Other 1 is burn undocked 2 assumes DOI 3 landing site 
Ri: FS MMAT . 

CAPCOM Good readback, Charlie. 

PAO This is Apollo Control at 77 hours 54 min- 

utes. During the last few minutes among the sets of numbers 
passed up to the crew by CAPCOM Hank Hartsfield, were those 
they will use In performing the descent orbit insertion 
maneuver, and that burn is to occur at 78 hours 33 minutes 44 
se;conds. The maneuver will be performed using the spacecraft 
service propulsion system engine. It will be primarily a re- 
trograde burn resulting in slowing the spacecraft by about 
203.8 feet per second or about 136 miles an hour. And as a 
result of that, we expect the orbit to be changed to a 58,5 
by 10.3 nautical miles. This is the orbit from which the 
spacecraft will begin the powered descent to the lunar surface 
OE. the 13th revolution. 

SC Houston, do you want to take a look at our 

rotated vector in P40 before we start our maneuver? 

CAPCOM Roger, stand by. 

CAPCOM The P30 looked good. Ken. 

SC Okay, the question was do you want to take 

a look at the rotated vector P40 before we start our maneuver, 
or can we go ahead and start the maneuver? 

SC Houston, did you miss the question? 

CAPCOM Negative, but we're having trouble finding 

an answer. 

S C Oh , ok ay . 

CAPCOM 16, Houston, go ahead and call P40 then 

mane uver . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h/19/12 CST 17:51 GET 77:57 262/1 



CAPCOM 16, Houston, go ahead and call P-40 and then 

mane uve r . 

SC Okay, got enough look now? 

CAPCOM He's looking at it now. Ken. Got a good vec- 

tor. Go ahead, Ken. 

PAO This is Apollo Control at 78 hours 2 minutes. 

At the present time the Apollo 16 crew is in the process of put- 
ting the spacecraft in its proper attitude for the descent or- 
bit insertion maneuver. That burn is to be performed in 31 
minutes 30 seconds with the spacecraft out of radio contact on 
the backside of the Moon. We have about 21 minutes remaining 
before we lose radio contact and in that amount of time we'll 
be monitoring spacecraft systems, flight dynamics officer will 
be taking a last look at all of the numbers passed up to the 
crew to assure that the burn is the precise maneuver that we 
want to perform. Based on the numbers provided and which are 
entered in the computer on board that burn will be 24.2 seconds 
in duration and targeted to give us an orbit of 58.5 by 
10.3 nautical miles. The current orbit is 169.9 by 
5 8.1. 

CAPCOM 16, give us OMNI Delta. 

SC Hey, you got it. 

CAPCOM Roger. 

PAO this is Apollo Control, flight director 

Pete Frank has just gone around the room polling each of the 
flight controllers here, getting a status for the descent or- 
bit insertion maneuver. All the lights came up green, every one 
says we're go and we'll be passing that go up to the crew 
s ho r t ly . 

CAPCOM Apollo 16, Houston, everything looks good 

down here. You've got a go for DOI and the monitoring limits 
in the flight plan are good. 

SC Okay. 

PAO This is Apollo Control, we're coming up 

now on 9 minutes until loss of contact with Apollo 16. About 
19 and 1/2 minutes away from the time the crew will be per- 
forming the descent orbit insertion maneuver. This maneuver 
of course performed behind the Moon we'll be out of radio 
contact and we'll get our first look at the results of that 
maneuver when they come back around on the other side of the 
Moon on their 3rd revolution. this burn is a very critical 
maneuver which must be performed in very pre — within very 
precise limits and p ar ti cul ar lly in the shutdown which the 
computer will signal. An overburn of slightly more that 1 
second would place the spacecraft out of trajectory which 
would impact the Moon if it were not corrected. The normal 
procedure that the crew would follow in the event that they 
do get an over burn is to take out the over burn by using the 
reaction control system thrusters. We'll get about ten minutes 



APOLLO 16 MISSION COMMENTARY U 119 jH CST 17:51 GET 77:57 262/2 



PAO of tracking as they come around the front 

side of the Moon on their third revolution and based on this 
information we'll give them a go no-go to stay in the tra- 
jectory resulting from the descent orbit insertion maneuver. 
If we don't like the looks of the trajectory based on ground 
tracking they'll be told to perform the bailout burn. And 
that maneuver is scheduled at 79 hours 22 minutes 8 seconds in 
the flight plan if It is required and would place the space- 
craft in a safe 62 by — 62.6 by 5.3 nautical mile orbit, again 
this is a contingency procedure only, and would be used only for 
some reason the descent orbit insertion maneuver was not as 
planned and the spacecraft was determined to be in an unsafe 
orbit. The guidance officer has just reported that the crew 
has switched to program 40, the program that they will use 
prior to performing the descent orbit insertion maneuver. 
And everything continues to progress very smoothly, 

CAPCOM Roger, John. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h 119 /ll CST 18:09 GET 78:14 263/1 



SC 


Okay, Houston, we're going to do the gimbal 


ch e ck . 




CAP COM 


Roger, we are watching. 


S C 


Okay, the gimbals are trimmed. 


CAP COM 


Ro ge r , c opy . 


S C 


and 5 0 9 is killed. 


CAP COM 


Ro ge r . 


CAP COM 


16, Houston, we're about 2 minutes from LOS. 


S C 


Roger, 2 minutes from LOS. 


SC 


About 12 from the burn. 


CAP COM 


Roge r . 


PAO 


This is Apollo Control. We've now had 



loss of signal with Apollo 16. We'll be reacquiring the space- 
craft in about 45 minutes. With a good maneuver we would 
expect that acquisition time to be 79 hours 10 minutes 25 seconds 
Without the burn we would be reacquiring about 3 and a half 
minutes prior to that, or at 79 hours 6 minutes 46 seconds. 
As Apollo 16 went around the corner of the Moon everything looked 
good for the maneuver. The spacecraft was in an orbit of 
169.4 by 58.1 nautical miles and the last velocity reading we 
got was 5 368 feet per second. We're now about 9 minutes 17 seconds 
away from the scheduled time that the crew will be performing 
descent orbit insertion. At 78 hours 25 minutes this is 
Apollo Control Houston. 



END OF TAPE 



A:?0LL0 16 MISSION COMMENTARY 4/19/72 CST 18:19 GET 78:25 264/1 



PAO This is Apollo control at 79 hours 6 min- 

utes. We're about 4 1/2 minutes away from the expected time 
of reacquiring Apollo 16 on its third revolution of the moon. 
At which time they should have lowered their orbit to about 
10 by 58 nautical miles. If, however, for some reason they 
did not perform that maneuver we would be reacquiring in about 
30 seconds. The service propulsion engine on this particular 
spacecraft is consuming about 66 pounds of propellant per 
second of burn based on that when next we see Apollo 16 they 
should be about 1 600 pounds lighter and traveling about 
136 miles an hour slower. The descent orbit insertion maneu- 
ver which was targeted to occur at the ground elapsed time 
of 78 hours 33 minutes 44 seconds was to have been a 
24.2 second burn of the service propulsion system engine, and 
this would produce a total velocity change of 210.3 feet per 
second most of which would be retrograde giving us the desired 
orbit of 58.5 by 10.3 nautical miles. And we've passed the 
time of acquisition had they not performed the burn all con- 
tinues to be quiet. We're now 3 minutes away from the ex- 
pected time of acquisition with a good descent orbit insertion 
mane uver , 

This is Apollo control. We should be 
acquisition of signal now. And network reports 
AOS. 

Okay, Houston nominal burn, first DOI 
had that was nominal. 
Ro ger. 

At least in our training. 



on 
h ave 



PAO 
coming up 
that we 
SC 

burn we ever 
CAPCOM 
SC 

CAPCOM 
repor t , 
SC 

clipping the 
W€i got burn report of 
24. 4 plus 2 ball 06. 
so we did not trim, 
minus 2.3 Delta VC 

CAPCOM 
SC SC 



Okay, we're stand by for your burn 



Okay, Henry, it feels like if 
top of the trees off, that's what it 

delta TIG zero. Burn time we got was 
2106 PGX trim attitude 001 2 72 003 



t 



we had - we're 
looks like. 



Residuals were plus , 
fuel 337 ox 346. Over. 
Roger, 16 unbalanced? 
Okay, it jumped up to 



8 plus 0 plus .1 



200 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h /19 / 11 GET 79:11 CST 19:05 MC-265/1 



CAPCOM -- 16 unbalanced. 

SC Okay, it jumped up to 200 increase. 

CAPCOM Roger, copy. 

SC It never really stablized though. Hank. 

CAPCOM Okay. 

SC And a verb 82 last look thought we were at 

10.9 pe ri gee , 

CAPCOM Roger, copy, 10.9. 

SC But I don't think it really knows — but 

the MSFN really knows. 

PAO That last comment was from John Young, 

Earlier we heard from Charlie Duke reporting a nearly perfect 
descent orbit insertion maneuver. Young reported that they're 
on board, Reading show that they had an apolune of -- rather 
a perilune of 10,9 nautical miles. The targeted was 10,3, but 
again that's an onboard reading and we'll be tracking and get- 
ting a reading here on the ground. 

SC Houston, 16, it appeared to us that we got 

an AUTO shut down. 

CAPCOM Roger, Charlie, copy -- AUTO shut down. 

SC You got any preliminary data, Houston? 

CAPCOM Roger, John, the Doppler says stay, we're 

waiting on the short arc. 

SC Okay, thank you. 

PAO John Young's question is in reference to 

stay -- no stay -- that we'll be passing up from the Control 
Center here in the event that tracking data -- we've got about 
2 minutes of it on which the flight dynamics officer will 
make his calculations — in the event tracking data 
showed that we did not get the desired orbit and we're in an 
unsafe orbit, the crew has a maneuver on board that they would 
perform to raise their orbit to a satisfactory level. This is 
a so-called bailout burn which would be performed at 79 hours 
22 minutes 8 seconds or about 6 minutes from now. All indica- 
tions, preliminarily, are that everything is good. Assuming 
that maneuver when as planned, and the orbit is as we would 
expect, Apollo 16 should be at an altitude of about 19 nautical 
miles above the lunar surface accounting for Charlie Duke's 
earlier comment that it appeared to be right down among the 
tree tops . 

CAPCOM 16, Houston, your good on the short arc, you 

have a stay, and we show you 59 by 10.7. 

SC Roger, 59 by 10.7, Thank you sir. 

CAPCOM 16, Houston, could you give us AUTO on the 

high gain? 

SC Roger. Henry, if you remember that little 

real bright crater on the northern rim of Schbleegan that Stu 
and Farook were talking about the other day, we happened to 



APOLLO 16 MISSION COMMENTARY h /13 Jl2 GET 79:11 CST 19:05 MC-265/2 



SC see it right up close to us as we came by 

on this orbit — and we got a couple of (garble) on 
it and that really is an unusual little guy. And it's really 
b eauti f ul . 

CAPCOM Roger, copy. 

SC I probably get carried away with all of this, 

but we've done all kinds of things to see back here. It really 
would be nice to fly that kind of an orbit down low. 

CAPCOM Roger. 

SC And, we're pitching down to our landmark 

track attitude and this is my first chance to point the sextant 
at the surface, and the sextant is just as clear as a bell. It 
is beautiful. You can pick out little bitty features that are 
just as clear — there's no fuzziness, and the telescope's the 
s ame w ay . 

CAPCOM Hey, that's great[ We ought to be able to 

get some good use out of that. 

PAO This is Apollo Control. The landmark track- 

ing Ken Mattingly is referring to os a procedure used on board 
the spacecraft to determine their orbit. It's also a procedure 
that will be used by Mattingly from lunar orbit to track the 
spacecraft on the surface of the Moon, hopefully, and allow 
scientist on the ground to compute a precise location for the 
landing site for the touchdown part of the Lunar Module. We 
now show Apollo 16 at an altitude of 13.8 nautical miles, con- 
tinuing to drop down towards P eri cy nth ion . And the preliminary 
tracking data, the flight dynamics officer reported, shows an 
orbit of 59 by 10.7. We expect that that orbit will be refined 
somewhat as we get additional tracking that's based on the 
first look of the tracking data, but is very close to the de- 
sired orbit of 58.5 by 10.3 nautical miles. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k I \^ ] 11 CST 19:18 GET 79:24 266/1 



SC Ah, Hank out to the, my side, out window 

5 There was one crater here that you could see in 
one section of it, it looked like some outcrop two-thirds the 
way up the crater wall and some big blocks had rolled down the 
into the crater floor and you could see the boulder track all 
the way down. 

CAPCOM Roger, copy. Can you locate that one. 

SC Ah, wait a minute. No I'm pretty lost 

right now. Let me see if I can figure it out. 

SC Ken, while you're maneuvering there we'd 

like to ask you what value did you put in your EMS and what 
did you get on your EMS check? 

SC Houston, 16, that crater I had I think was 

a series around MacLaurin and maybe a little bit further west 
than that. 

Roger, copy. 

Ah, Hank, coming across the mare here it 
of pitot static system cals at Edwards. 
Ro ge r . 



CAPCOM 
SC 

reminds you 
CAP COM 

across huh? 
CAP COM 

h ad ab out the 
SC 



You re really down low screaming 



EMS 



did you copy the question I 



to them, no 



16 , Hous t on , 
Delta V? 

Houston, the Goclenius rille, 
looks like large drop-ins with very subdued sides 
outcrop at all apparent from my position. 
CAPCOM Roger, copy. 

SC And looking on up into the Gutenberg rille 

you can see it cross one crater just climbs right across the 
crater wall. 

Ro ge r . 

So that's Gutenberg Sea. 
can see the wall has down 



CAP COM 

SC 

Sea, H ank , and 
rille. 

CAPCOM 

SC 

CAPCOM 
about the EMS 
S C 

CAP COM 
SC 

CAPCOM 
EMS Delta 



you 



That' s 
dr oppe d 



Gutenb erg 
into the 



Roger, copy. How do 
I'm reading you 5 by, 



you read Charlie? 



I asked a question 



the 
the 



Delt a 
SC 

that. Hank? 
CAPCOM 
SC 

drift in the 
an d the b i as 



Okay, a littler earlier 
Delta V. Did you copy that? 
Negative, we did not. 

Okay, ah 

It read minus 2.3. 

Roger, we had a question here as to how 
V check came out and which value you loaded into 



V counter? 



Standby. Can I call you in a second 



on 



EMS 
w as 



Sure thing. 

It was like 1.8 at shut down because of the 
and I did a check and it came out to normal 
the same. I put in the Delta VT and the same 



thing as we've used before, it didn't look to me like the bias 



APOLLO 16 MISSION COMMENTARY kllS/H CST 19:18 GET 79:24 266/2 



SC was in the less than half a foot per second. 

CAPCOM Roger, copy. We were a little confused 

here because of the value that you had at the end there was 
somewhere in between what we thought it ought to be, depending 
on which setting you put in the Delta V counter. 

SC Rog, it was about 1.6 or something like 

that at shut down. I'll have to look back at the flight plan. 

SC Okay, Houston, the walls - the north wall 

of Capella has striations that are dipping eastward about 
oh, 60 degrees or so all the way across the north face. 

CAPCOM Roger. Copy, Charlie. 

SC Okay, and also Isidorius is the same thing. 

CAPCOM Roger. 

CAPCOM J2 should be on the horizon now, Ken. 

SC Rogj we got the - it's right on the horizon. 

Still haven't picked up the target yet. Looks like it's tracking 
just about right, I have Theophilus going out of the field of 
view now. 

CAPCOM Ken, you're coming up on about 30 seconds 

to TCA. 



END OF TAPE. 



APOLLO 16 MISSION COMMENTARY 4/19/72 CST 19:29 GET 79:35 267/1 



SC 

sc 

CAP COM 
S C 

are going (garble) 
SC 

Gator crater right 
CAP COM 
PAO 

one of the craters 



At 30 seconds to TCA. 

He has the target, Houston. 

Ro g e r . 

Big old hill down the stream from where you 

Guess who is making them marks on 
n ow ? 
I wonder who. 
Gator crater is 



about 700 yards across 
at the Descartes landing site. Ken 
Mattingly obviously taking a landmark sightings on that crater 
at the present time, and as Apollo 16 passes directly over 
the landing site. 

Now that's what I call OJT right there. 
How did the landing site look through 



the 



SC 

CAP COM 
s ext an t? 
SC 



Hank . 

CAP COM 
SC 

pass I ' ve ever 
CAP COM 
CAP COM 

came ra photo 
SC 

CAP COM 
and that same 
SC 

That' 11 be the 
CAP COM 



made 



You have to do that with the telescope, 
Ro ge r . 

I think that was the best high speed 



m a 



SIM BAY 
SC 



Ro ge r . 

16, Houston. I have your map and pan 
pads for 8035 whenever you are ready. 
Okay, Henry, go ahead. 

Roger, T start 080 3801 T stop 0 80 4604 
pad is good for the pan camera. 

Okay, T start 080 3801 T stop 080 4604. 
same pad for both cameras. 

16, Houston, we'd like you to go on and 



ge t 



an d 



attitude so we can get a DSE dump. 

Wilco. Hey Hank, you want me to go ahead 
do this single jet authority or use couples to go to the 
attitude? 

Stand by. Ken, why don't you go 
then we can go single jet. 
Okay, sounds like a good plan. 
16, OMNI Charlie. 

Hank, would you check on one thing 
me.' Would you find out if this method I've been using 
reading out the maneuver times VERB 4 NOUN 1 is in any 
affected by or affects the use of program 509. 
CAPCOM Will do, Ken. 

SC Thank you, sir. And I got a couple of 

minutes here if you would like to go over some of those 
questions you had before now. I wasn't paying much attention. 

CAPCOM Standby Ken, I think they got your answer 

a while ago and it satisfied them, but I'll make sure. 

Okay, I wasn't paying a lot of attention 
I was trying to pick up that land mark. 

CAPCOM Do you have any comments on the land mark 



CAPCOM 
ahead and go couple 
SC 

CAPCOM 
S C 

for 7 
for 
way 



APOLLO 16 MISSION COMMENTARY hJlSjll CST 19:29 GET 79:35 Idl/l 



CAPCOM tracking, did It all go smoothly? 

SC Well, except for the fact that those 

objects are perfect, that's really neat. The target area 
did not look as I anticipated. I think it's a function 
of the low sun angle, but it looked like to me they were far 
more rims around the craters then what - the impression I had 
looking at things on the models. And I did not pick up north 
or south they were in the shadows. So, I guess 
it's possible that I could have been on the wrong crater, 
but it sure looked like to me like I must have been on Gator. 

CAPCOM Roger, copy. 

SC It's still a problem in scaling when you 

look at something like that till you are sure that you had the 
right feel for it. But I think it's pretty obvious, and I 
tViink picking it up tomorrow will be relatively easy. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/19/72 CST 19:41 GET 79:47 268/1 



gam 



m — 



CAP COM 
PITCH plus 
SC 

CAP COM 

SC 



H ank . 

CAP COM 
maneuver completion 

SC 
that . 

SC 

solar monitor and 
do that? 

CAP COM 

SC 
SC 

and the door and 



15, Houston, could you bring up the high 
35 YAW 290. 

Say again your YAW number. 

Roger, 290. And, Ken, there's no problem 

Okay, Hank, 

Roger, they 
time and it 
Okay, thank 



and we're about — go ahead, 

say there is no problem in calculated 
does not interfere with 509. 
you. I've been avoiding using 



Alright, we're about ready to go through 
tiedown release. You folks ready for us to 



Roger, we're ready to go. Ken. 
Okay . 

Okay, Houston, we released the tiedowns 
heard just a very tiny little sound on each 



of those activities. 

CAPCOM Roger, we copy. Ken. 

SC Hank, another piece of questionable data 

that've collected today is on our low pass on the backside 
there we got our color wheel out and we have 2 votes for num- 
vote for number 13. 

Roger, copy. 

And that's over on the backside just past 
number 17 really isn't quite right, it's just 
the closest thing we had and the same comment applies to 
n umb er 13. 

Well I still say 13 was right on. 
You'll never guess who voted for 13. 
The grits have affected his vision. 
That's probably what it is, John. 
Right . 

Hey, Hank, ask Stu who he believes. 
Will do. 

Okay, Hank, we have a SIM bay jett 
I'm going to start deploying equipment. 

Roger, copy. Ken you want to keep 
you're doing there with the switches? 

Okay, I got the mapping camera door open, 
the alpha cover door open, and the mapping camera's going 
and we've just gone through 1 minute of extend time and 
timing the first one. 
CAPCOM Roger, copy. 

SC I'll do the gamma ray mass spec boom se- 

quentially afterwards so I can pay attention to the times. 
Okay, and I've got gray on the mapping camera extend and that 
was at 1 minute and 20 seconds. 



ber 17 and 1 
CAPCOM 
SC 

(garble) and 



SC 
SC 
S C 

CAPCOM 

SC 

SC 

CAPCOM 
SC 

figuration and 
CAPCOM 

posted on what 
SC 

an d 
out 
I'm 



con- 



US 



APOLLO 16 MISSION COMMENTARY U/lS/ll CST 19:41 GET 79:47 268/2 



CAPCOM Roger, copy. 

SC Okay, can you read me on VOX, Henry. 

CAPCOM Roger. 

SC Okay, that's the way we'll operate. I'm 



going to the gamma ray deploy at this time, I'm going to hold 
it for barber pole plus 2 seconds then OFF. Going to deploy. 
Deploy. Barber pole now 1, 2 OFF and it's gray. Gamma ray 
is coming to retract. Mark barber pole and it's gray. 

Okay, going to the mass spectrometer. Deploy -- mark -- bar- 
ber pole 1, 2 OFF, mass spec to retract. Mark -- barber pole-- 
OFF. Okay, they're both in the retract position and everything 
looks normal. The X-ray is coming on -- mark. I've com- 
pleted the gamma ray and mass spec boom deployment and re- 
traction and I'm ready to go ahead with the mass spec deploy- 
if that's okay with you? 

CAPCOM Roger, go ahead. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hll^Jll CS T 19:53 GET 79:59 269/1 



SC I've completed the gamma ray and mass spec 

boom deployment and retraction and I'm ready to go ahead with 
the mass spec deploy, if that's okay with you? 

CAPCOM Roger, go ahead. 

SC Hey, It's deploy on the mass spec and I'm 

tl min g it. 

CAPCOM Give us auto on the high gain, 16. 

SC 5 seconds to stop. Okay, it's off on the 

mass spectrometer, and gain auto. 

SC Okay,Hank,yougotthe mass spec out 

to 8.4 feet . 

CAPCOM Roger, looks good down here. 

SC Laser altimeter is coming on. Mark and 

can I go ahead and put the mass spec experiment on without 
waiting the 3 or 4 minutes? 

CAPCOM Standby. Roger, go ahead. 

SC Okay. Mass spectrometer experiment is 

coming on, Mark. The ION source is going to standby. Mark it. 

SC Can you tell how the Laser is doing yet 

Hank? 

CAPCOM Standby, Ken, we'll take a look. Laser 

looks good. Ken. 

SC How outstanding, 

PAO This is Apollo Control at 80 hours 12 min- 

utes. The Guidance and Control Officer reports that from 
looking at the replay of data from that descent orbit insertion 
maneuver performed at the end of the second revolution, he 
reports that the engine appeared to perform normally in every 
respect and we're currently showing Apollo 16 in an orbit 58.6 
nautical miles by 9.9 and we expect that will continue to be 
refined somewhat. Ken Mattingly has completed a series of 
exercises that deploy certain of the experiments in the service 
module scientific instrument module bay, the SIM bay experiments, 
the gamma ray and gamma ray spectrometer and mas spectrometer on 
25 foot and 24 foot booms respectively were extended to their full 
out positions and then retracted, to checked the operation. 
Mattingly then extended the mass spectrometer to about a third 
of it's length and turned it on. It's about 8.4 feet out from 
the side of the service module now on it's retractable boom. And 
also turned on the laser altimeter. The mass spectrometer is 
designed to gather information on the nature and composition of the 
lunar atmosphere; also to detect contaminants in that atmosphere. 
Such things as the volatile products — 

CAPCOM 2 minutes from LOS. 

SC Alrighty, see you in a little while. 

CAPCOM Roger. Over. 



APOLLO 16 MISSION COMMENTARY 4/19/72 CST 19:53 CRT 79:59 269/2 



PAD 'I'lie musH spectrometer tk-tects such tilings 

as the volatile productH given off by volcanoes, should any 
of those happen to be active around this time, we also detect water 
vapor should that exist in the lunar atmosphere. The other 
experiment activated by Mattingly was the laser altimeter. 
You heard him ask how that was performing. A report from the 
orbital science officer here was that it appeared to be func- 
tioning normally. This device measures the spacecraft altitude 
above the lunar surface and is correlated with panoramic camera 
photographs obtained of the lunar surface. Putting these two 
bits of information together - the photo and the laser altimeter 
data - it's possible to determine within about 6 feet the 
elevation of lunar surface features. We are now about 
45 seconds from loosing radio contact with Apollo 16 as the 
spacecraft passes behind the Moon on it's third revolution. 
We'll be reacquiring - reestablishing radio contact at the 
beginning of the fourth revolution in about 45 minutes. 

SC Houston, 16, do you read? 

CAP COM Roger. 

SC Okay, Hank, I'm up with the biomed. Take 

a quick look at it. 

CAPCOM Looks good. 

SC Okay, Since we are going to put on our LCG's 

tonight, I don't bit put on the -- 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h I \3 111 CST 20:58 GET 81:04 270/1 



PAO This is Apollo Control at 81 hours 4 minutes 

we're standing by now to regain radio contact with Apollo 16 
now in it's fourth revolution of the Moon. This will be the 
last front side pass prior to the time the crew begins their 
scheduled 9 hour rest period. And should be a relatively quiet 
period. And the flight dynamics officer has just reported 
the — that their latest tracking shows the spacecraft to be 
in an orbit of 58.6 by 10.6 nautical miles. As a result of 
that descent orbit insertion maneuver. We're about 10 seconds 
now from regaining radio contact. We've had acquisition of 
s ignal, 

CAFCOM Apollo 16, Houston. 

CAFCOM Apollo 16, Houston, how do you read? 

SC You're 5 by, Hank. 

CAFCOM Roger. Our data down here we worked on 

during the backside shows you're at 58.8 by 10.6. 

SC Okay, and while we were on the backside 

we had a couple of main B interval lights. 

CAFCOM Roger, copy. You want to tell us about 

it? 

SC Stand by, yeah, was--when Ken, was messing 

around with the SIM bay and he'll fill you In. 
CAFCOM Okay. 

SC And we got a little behind on this se- 

quence already Hank, but as soon as I turned the -- had the map- 
ping ON it worked fine. I turned the pan camera ON and as 
soon as I went to operate on the pan camera we got main B 
interval, so I turned it back to stand by and left it there 
Charlie said he saw about 25 volts on main B and concluded 
I'd wait and let you take a look at it. And then we got another 
main B interval some 5 minutes or so later and it again was 
momentary, by the time we looked at it all looked pretty nor- 
mal. Only we checked the fuel cells regulator pressures, they 
looked good and I really don't have any idea what might have 
caus ed it. 

CAFCOM Yeah, all the things we could check, look 

ok ay . 

SC Hank, we got — it might not even be a 

small anomaly but fuel cell 3, the H2 flows running a little 
bit higher than the 02 flow, but the regulated pressure looks 
fine to me. But the other 2 fuel cells H2 and 02 match. 

CAFCOM Roger, we copy, Charlie. 

SC My guess is when you dump the DSE the 

whole story will be right on there probably. 

CAFCOM Okay, check Tom. 

SC When you get the DSE translated it'll 

probably tell you what happened. 

CAFCOM Roger we copy. 

SC Hank, you really can see both the mass 

spec and the gamma ray booms deployed. 



APOLLO 16 MISSION COMMENTARY 4/19/72 CST 20:58 GET 81:04 270/2 



CAPCOM Ro g , understand you can see them both. 

SC That's affirm. Looks like a couple of 

feet of the boom is about all you can see. 

CAPCOM You really got us puzzled with this under 
volt now, because the pan camera runs off the main A. 

SC Yeah, we noticed the same thing. It -- 

you know may net be rational — 

END OF TAPE 



APOLLO 16 MISSION COMMENTARY k 119 Jll CST 21:06 GET 81:11 271/1 



CAPCOM ... this undervolt now because the pan 

camera runs off the main A. 

SC Yes, we noticed the same thing. You 

know it may not be rational, but it just seemed like that 
was the - I touched one switch and got a main undervolt so 
I took it back off again. Decided to let you think about 
it before I added anymore. Possible that it doesn't have any 
conne ction . 

CAPCOM Roger. 

SC I still have the power on it. Hank. I've 

got it in stand by and power on. 

CAPCOM Roger, copy. And Ken, like to verify 

is your n on essential buss on main A or main B? 

SC That's main A. 

CAPCOM Roger. 

SC And Hank, last night we - I think we 

got verification that we could wear the LCGs to bed tonight 
and be all ready to go in the morning. 

CAPCOM That is affirmative. 

SC Okay. Anybody thought anymore about my 

s uit ? 

CAPCOM We thought about it and smoked it over 

and we kind of think maybe we ought to do nothing unless you 
have some real bad trouble tomorrow. 

SC Like if we can't get it zipped. Okay, 

can we use my pliers on it to pull the zipper closed? 

SC Houston. 

SC Houston, 16. Do you read, over. 

CAPCOM Roger, reading you 5 by 5 John, go ahead. 

SC Okay, if I have trouble closing it can 

I use my pliers to get a better grip on it to pull it closed? 
Because it took me the better part of 20 minutes the other 
day to do it, and it usually takes about 2. There 's a place 
on there in the small of Charlie's back where that thing 
has just separated too far apart on the restraint zipper for 
me to pull it closed easily. When he gets on the LCG the 
FCS and UCD bulk in there the suit is going to be farther 
apart than it was yesterday. 

CAPCOM John, we talked to Dave about that and 

he said the big problem is that you can't arch your back in 
zero g as well. He had a lot of trouble too, but on the Moon 
in l/6th g he had no problem at all because the gravity helped 
him arch his back. Does that sound like the problem you 
just couldn't get arched back that far enough to do it? 

SC Got me there, it looked like he was 

arching as much as he usually is. But, you saying that if 
I can't do it in zero g we go on down to the Moon and try it 
in l/6th g? 

CAPCOM That's sounds pretty good, John. We did 



APOLLO 16 MISSION COMMENTARY 4/19/72 CST 21:06 GET 81:11 271/2 



CAPCOM look at a back up procedure here but it's 

a long thing that Involves using a needle and pulling things 
together like your sewing. 

SC Okay, Hank I think to give us every bene- 

fit of the doubt that I will not - I don't plan to wear the 
SOS probably tomorrow I'll just use the LCG and UCD. 

CAPCOM Roger, understand and could you give us 

and a high gain. 
SC There you go. 

SC Hank, also we would like to get permls- 

to fill the drink bags tonight and save a few minutes 
if you think that's gonna be alright. 

Roger, go ahead and do that Charlie. 
Alright . 

Ken, we can't find any connection between 
main bus A and we were wondering - or 
were wondering if when you got the second 



AUTO 



s iLon 
also 



one undervolt were you moving any switches at that 

That's negative. They were both momentary 



CAPCOM 
SC 

CAPCOM 
the pan camera and 
main bus B, and we 
moment ary 
time? 

SC 

main bus undervolts. 

CAPCOM Roger, the first one was a momentary also 

SC It could be or it could be that the sen- 

sor is triggering at the wrong level. It could be that the 
sensor shifted up to something that looks reasonable. I 
wouldn't object - we still got the pan camera power on I 
wouldn't object to it to operate for a second and back off 
go ahead and use a couple of frames just to let you watch it. 

St and by. Ken. 
Ho us t on , 16 . 
Go ahead. 

Is Tom satisfied with his glycol evap 
out. We've got off scale high here. 

Stand by a minute, Charlie. 



ahead and 
CAPCOM 
SC 

CAPCOM 
SC 



CAPCOM 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h Il9 111 GET 81:22 GST 21:17 MC-272/1 



Standby a minute 



Ch arlie . 

coming right against 
you should now monitor 



CAP COM 

CAPCOM 16, Houston, you're 

the top of the scale you're still okay, 
RAD out. 

SC A RAD out is 75. 

CAPCOM Roger, 

CAPCOM 16, Houston, talked with the suit people, 

they don't want you to using the pliers on the zippers. 

I'm just using it to get a better grip with, 
zipper, just to pull with. 

Their concern is over sideload, John, they're afraid 
pi i e rs . 
Ok ay . 

This is Apollo Control at 



not 



for 



the 



the 



SC 
to pull 
CAPCOM 
you to use 
SC 
PAO 
utes . 

CAPCOM 
about this docking 
SC 

CAPCOM 



81 hours 30 min- 



Uh , we would like to talk to you a minute 
re free. 



latch, if you 
Go ah e a d . 

Okay, we've got a real long procedure here. 
I don't think you need to copy it all down. Let me just read 
it through to you once, and kind of maybe discuss it as we go. 
What we want to do is kind of get a look at the thing tomorrow 
and see what the condition of it is. After you disconnect the 
LM umbilical, we would like for you to open the orange LM um- 
bilical connector cover, and inspect the roller pawl. The roller 
pawl, we hope, is engaged in the detent so we would like to find 

the detent, or is it free, or sticking up, and you 
looking in the side of the latch after you remove 
connector cover. Is there any question on that? 



out if it's in 
can do that by 
that umbilical 
SC 

Ing f or . 

CAPCOM 

SC 

CAPCOM 
of the latch. 
An d it c an be 
The pawl is just a 
a little roller on 
has the detents in 

SC 

SC 



Yeah, I'm not sure I know what you're look- 



Okay, when you look in the side there -- 
I'm not at all sure what the roller pawl 
Okay, the roller pawl is on the far left 
behind and above the auxiliary release button, 
identified by the roller on the tip of the pawl 
little arm that sticks out and it's got 
the end of it that rides on the cam that 



xs • 

side 



it . 

Okay . 
Do you 
That ' s 



want to do this before we unlock it? 
affirmative. And it best be done 



CAPCOM 

tomorrow before you get your helmet and gloves on, of course. 
Just take a look at it while -- perhaps while they're bringing 
the LM up. And if you find after we get the condition of that 
If the roller is down in the detent like we suspect that it is 
when you remove the yellow probe umbilical cover on the right 



APOLLO 16 MISSION COMMENTARY h 119 112 GET 81:22 CST 21:17 MC-272 /2 



CAPCOM side of the latch, we would like you to 

look in the right side in there and at the bungee bell crank 
mechanism to see if there's any foreign object damage or anything 
wedged up in there. 

SC When you say remove the cover do you mean physi- 

cally remove it from the spacecraft, or just open it up and look 
underneath it. 

CAPCOM Just open it up and look under there. Ken. 

And this is mainly — these two steps is just an inspection 
we just like to verify the condition of the rollerpawl and 
also the bell crank mechanism on the other side. Has nothing 
to do with the latch, but at least it'll give us an idea of 
what's wrong inside if there is anything. It's not going 
to help you in any way to prepare for unlocking it. To unlock 
it — after you've looked at these two things, we would like 
to know if the latch handle requires force to cock the latch 
on the first stroke — and the second stroke if required. In 
other words, if the handle comes away real easy, as you recall, 
then the thing is already cocked. More than likely, it is going 
to take some force and we would like to verify how this works. 
And if it should require force pull it down and then we want 
to see that the hook comes out to inboard approximately 16 de- 
grees. If the hook doesn't come out, then all you got to do 
is pull down on the handle to the full cock position, and hold 
it and then just reach up and grab the hook, and pull it in- 
board about 16 degrees and the hook should stay there. And 
then you just proceed with normal undocking. 

SC Okay, so the kind of thing you want me to 

look for are information only. Is that affirmative? 

CAPCOM Right, it would help the guys down here to 

try to understand what really happened to the latch. We kind 
of suspect it only got one cock. But if you look in there, and 
look for the roller pawl on the left side and look at the bell 
crank on the right side -- at least that would tell us that 
nothing is jamming it and that the roller pawl is in the right 
direction — right place. Operationally though, prepare for 
undocking — what it really amounts to you just use the normal 
procedure — you pull the latch handle down and cock it if nec- 
essary, and if the hook doesn't come back just hold the latch 
handle all the way down to the full cock position and pull the — 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hllS/ll CST 21:27 GET 81:32 273/1 



you 



CAPCOM operation Is to prepare to undock and what 

it really amounts to you just use the normal procedure - you 
pull the latch handle down and cock it if necessary and If the 
hook doesn't come back, just hold the latch handle all the way down 
to the full cocked position and pull the hook back. 

Okay, I just wanted to keep in mind what 
it was I needed if the time gets crowded. 

CAPCOM Rog. The other things - if there is any 

question on cocking. The only thing you have to do there 
is just pull it down and get the hook out of the way. Do 
have any questions on any of that. 

SC Ah, Hank, we just (garbled). 

Not, not right now. Maybe you want to get 
in there and look at it I'll call and ask you for some 
clarification or something tomorrow. But I think I know what 
you me an . 

CAPCOM Okay. 

SC Ah, Hank, as we came up 

site, in that terrain - the general terrain 
appears to be frothy vesicular looking type 
looking, at this scale. Over. 



towards the landing 
to the east of us 
terrain, real (garbled) 



that 



th en 



going , 



CAPCOM 
S C 

appearan ce 
CAPCOM 

S C 

TEI ? 

CAPCOM 

CAPCOM 

r ^ 

S C 
SC 

CAP COM 



t o 



Roger, we copy, Charlie. 

I'd say that was the Descartes, it has 
it to me . 
Ro ge r . 

And do you have this LM DAP load for us, 

Roger, we're working on those pads now. 
Charlie, we'd like to get a Bat B charge 



data. 

SC 
S C 

CAP COM 
119 097 45 5309 
020 rest of the 
for DOI. Won't 
s e con ds 
Moon at 



Okay , 
Bat B 

16 , Hous t on 



Bat B charge going on. 
is charging. 

I have your TEI 



12 19 block 



Okay , s t andby . 
Okay, go ahead. 

Okay, TEI 12 SPS G&N 39817 plus 061 plus 
plus 31632 plus 10403 minus 02346 181 080 
pad is NA. The set stars are the same as 
repeat unless you want. Ullage 2 jets 17 
other remarks burn, undock, assumes no circ. Longitude 
TIG minus 171.47. Landing site REFSMMAT. 



SC Rog. TEI 12 SPS G&N 39817 plus 061 plus 

119 09 7 45 5 309 plus 31632 plus 10403 minus 02346 181 080 
020 NA Sirius and Rigel and information is same as DOI 2 jets 
17 seconds, burn, undock assumes no circ, longitude of Moon 
at TIG minus 171.47, landing site REFSMMAT. 

CAPCOM Good read back and are you ready for TEI 

night data? 

SC Youspeak. 

CAPCOM Roger, TEI 19. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h/19jl2 21:34 GST 81:39 GET 274/1 



S C Yo u s pe ak . 

CAPCOM Roger. TEI 1 9 SPS G&N 39445 plus 061 

plus 115 111 31 4981 plus 29094 plus 07853 minus 02240 
181 100 017 set stars same as DOI, 2 jets 17 seconds. Other 
burn undecked assumes circ lamda Moon at TIG minus 16009 
end of pad. If you'll give us ACCEPT we're ready to uplink. 

SC Rog, you have it. And read back TEI 19, 

SI'S G&N 39445 plus 061 plus 115 111 31 4981 plus 29094 plus 07853 
minus 02240 181 100 017 Sirius and Rigel 2 jets 17 seconds burn 
undocked assume circ Lamda at TIG minus 1609. 

CAPCOM That was 16009. 

SC Rog. Henry can I assume that the mission 

timer is in sufficient sine and that we don't need to any 
updates there and that the REFSMMAT is good as is? 

That's affirmative. 
Thank you sir. 
Have you got the LM 



CAPCOM 
SC 
SC 
CAPCOM 



n ow 



Roger, we've got it 



DAP 
and 



stuff. Hank? 
we're uplinking 



we're also loading your EMP 509 and I have your DAP if 



you're ready to copy. 



SC 

CAPCOM 
the jet monitor. 
39 329 . Checklist 
re qui re d. 

SC 

are good as is . 

CAPCOM 
a change to your LM 

SC 

CAPCOM 
CAPCOM 
Charlie, it says 
SC 

page 1. 

CAPCOM 
064. The reason 

SC 

SC 

CAPCOM 
index angle of 
SC 

CAP COM 



Go ahead. 

Correction on that, it's not 509 it's 
Okay LM DAP. LM weight 36673 CSM weight 
DPS glmbal trims are good, no trim 

Rog, reading 366 73 39329 and the gimbals 



It's a good read 
Timeline book on 
Stand by. Is it 
Timeline book. 
It's a Chan ge to 
timeline book. 



back, Charlie, I have 
page 1. 

the timeline or activation? 



your undocking attitude, 

book. 

Okay, just had to get it out, go ahead 



Okay, change undocking attitude to 0 
for this is because the docking index - 
Rog, 0284 - 
Rog, 0284 064. 

Rog, that's because of your docking 
minus 3 and 1/2 degrees. 



284 



Copy . 
And I 



you, 
the 



have some flight plan changes for 



CAPCOM Apollo 16, 

position of the 02 tank 50 
SC They are OPEN. 

CAPCOM Roger, copy they 



Houston, we'd like to verify 
watt heaters on panel 226. 



are OPEN. Charlie, 



are you ready to copy the flight plan changes? 



APOLLO 16 MISSION COMMENTARY 4/19772 21:34 CST, 81:39 GET 274/2 

SC What kind of flight plan, LM or GSM type? 

CAPCOM Roger, they're GSM if you want to get then 

Ken, they're for tomorrows activities. 

END OF TAPE 



APOLLO 16 MISSION COMMENTARY kjl^jll GST 21:45 GET 81:50 215/1 



tomorrows 
Ok ay , 



Okay , the 
Go ahead. 
Ok ay , th ere ' 



SC 

CAP COM 
Ksin , th ei r for 
SC 

CAPCOM 
SC 

CAPCOM 
to read 10102. 

SC 

CAPCOM 
CAPCOM 
through gimbal 
SC 

ciLrc gimbal drive 
CAPCOM 
SC 

CAPCOM 
SC 

b (2 cau.s e we'd 

CAPCOM 
vents you from 
after — right prior to the 
DAP, VERB 48 10101 Xllll. 

SC 

After 



LM or CSM type? 
Ro ger , that ' s CSM, 



if you want to get them 



activities 
I'm re ady . 
firs t 



Okay, 10102 for 
Tha t ' s corre ct . 
At 96: 39 write in 
drive check for circ. 

Okay, at 39 load 509 
ch eck . 

That's correct. The 
Go. 

Delete the VERB 48, 
Okay, delete the VERB 
already set it, affirmative? 



one is at 9 6:34 



s a VERB 48 there change R- 1 



VERB 48 or 1 at 96 : 34. 



load EMP 509 leave ON 



That's affirmative 
activating Saturn DAP. 



and leave through 
next change Is at 9 7:15 

48 at 97:15, that's 
And that also pre- 



Okay at 9 7:44 , right 



VERB 49 maneuver there, put in load 



509, 



then Xllll. 
mane uve r . 

CAPCOM 
yours the E member 

SC 

CAPCOM 
the CO mm check 
SC 

CAPCOM 
terminate EMP 
SC 

loading VERB 48. 

CAPCOM 
32 minutes, load 

SC 

CAPCOM 
after P-24 complete 
SC 

CAPCOM 
changes. I hate to 
ctiange here for your 



Okay, you want to load 
the circ burn and ahead 



VERB 48 10101 and 
of the VERB 49 



98:32 prior to 



That's affirmative and Ken, the computers 
programs loaded. 
Alright sir, thank you. 
Okay, next change is at 
there put load EMP 509. 

(garble) comm check load 509. 
Roger and down about 98: 44 after POO and 
after the P-24 is complete. 
Okay, I'll terminate 509, between POO and 



The next change is at 100 hours 



Ro g e r . 
EMP 509. 

Okay, at about 100:32 load 509. 
Roger, and about 100:43 terminate 



EMP 509, 



Okay, will 
Okay, Ken, 
bring this 
SPS burn 



te rmin ate 
tha t' s it 
up again but 
cue card. 



509 after P-24. 
on the flight plan 
th ey ' ve got a 



SC Alright. What might that be. 

CAPCOM Well we had this starting this thing 20 

minutes early before so that we could help you, fire the LOS, 
and we're convinced that you don't really need that much time 
and what we think you ought to do is get the gimbal drive test 



APOLLO 16 MISSION 



COMMENTARY 4/19/72 CS T 21:45 GET 81:50 275/2 



CAPCOM started the main bus is on about 8 minutes 

early rather than 6 minutes, so the change is to where we had 

you 40 minutes or minus 20 minutes, is to change that to 52 and minus 
8. 

SC Okay, do I dare use my ink pen this time? 

CAPCOM I hope it's good for the rest of the bars 
now if we change that to 52 minutes and minus 8 minutes. 

SC Okay, it's no sweat. Thank you. 

CAPCOM Okay, and the next one it will become 
41 minutes and minus -- correction 53 minutes minus 7. 

SC Okay, 5 3 and minus 7 and 52 and minus 8. 

CAPCOM Okay, now earlier we had deleted that 
tape recorder 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/19/72 CST 21:53 GET 81:59 276/1 



CAPCOM Okay, now earlier we had deleted that 

tape recorder high bit rate line there and added it back 
on the back page. And I guess now we need to move it back. 

SC Okay, would you settle for minus 8 so I 

can just leave it where it is? 

CAPCOM Roger, that's good enough. Just do it 

there and delete it from the backside of the card. 

SC Okay, we'll do that. Hank, are we going 

to end up with temperatures that are low enough or would you 
like for me to manually set this temp in valve to a little 
lower temperature. 

CAPCOM Are you talking about the oxidizer pres- 

sure, Ken ? 

SC No sir the manual temp in and I'd like all 

them. 

CAPCOM Oh, that EECOM advises that looks pretty 

good now. 

SC Okay, is it going to get too cold on the 

dark side? 

CAPCOM Stand by a minute. 

CAPCOM Ken, ECON says that the present setting 

should keep you in good shape. 

SC Hank, I guess I would like to run it 

cooler to get the cockpit a little cooler if that isn't going 
to cause any other problems. 

CAPCOM Stand by a minute. Ken. 

CAPCOM Casper, Houston. We'd like to get the 

pan camera turned off. 

SC Okay, you just want to take and turn the 

p ower off. 

CAPCOM Roger, we were trying to look around it, 

but we got pretty high loads on the spacecraft now and we're 
getting close to LOS and it's not going to be time to exercise 
it . 

SC Okay, we'll just turn it off, then . 

Okay, Hank we've got the pan camera power off. 

CAPCOM Roger, Ken and did you happen to notice the 

retrack time on the mapping camera. 

SC Yesslrl meant to get that in. I 

thought it was excessive. In fact I thought it had maybe 
stuck it was about 3 mintues. 

CAPCOM Roger, we copy. 

SC And Hank, I got some film status to give 

you if your ready for that. 

CAPCOM Stand by. Go ahead. 

SC Say again. 

CAPCOM I'm ready to copy. Ken. 

SC Okay on magazine victor we're up to frame 

number 8 sierra sierra frame number 13 tango tango 04. 



APOLLO 16 MISSION COMMENTARY CST 21:53 GET 81:59 276/2 

SC November November 36. 

CAPCOM Roger copy, victor 8, sierra sierra 13, 

tango tango 04, november november 36. 

SC That's correct, sir. 

CAPCOM 16, Houston. For evenly distributed the 

electrical loads when you get on the backside after LOS we 
would like for you to take telecom group 2 to AC 1. 

SC Okay, telecom group 2 to AC 1. 

CAPCOM Roger, that's after LOS. And in regard 

to the mixing valve you could adjust that for an evap out 
temperature of 49 degrees and you ought to be okay. 

SC OK. Is that 49 degrees, the coldest 

temperature, or just how did you - 

CAPCOM If you adjust it right now to an evap - 

SC Okay, Okay, right now for 49. 

END OF TAPE 



APOLLO 16 MISSION COMMENTARY 1^/19111 GET 82:0A CST 21:58 MC- 277/1 



CAPCOM Apollo 16, Houston, we would like to get a 

E MOD, if we can. 

SC On the way. 

CAPCOM Roger. 

CAPCOM And 16, Houston, make sure you get the com 

set up right in your pre-sleep checklist here, or in co says 
they won't be able to command the thing right and we'll have 
to wake you up next time. 

SC Say again. Hank. 

CAPCOM Roger, they're admonishing me to tell you 

to be sure you follow the checklist on setting up the com pre- 
sleep. 

SC Rog, we'll do that. 

CAPCOM Apollo 16, Houston, we're about 2 minutes 

from LS . 

PAO This is Apollo Control. We've lost radio 

contact now with the spacecraft as it passes behind the Moon 
on the fourth revolution. The crew is scheduled to begin a 
nine hour rest period while on the backside of the Moon, and 
we would expect to hear no further word from them until the 
end of that rest period. During this frontside pass on the 
fourth revolution, there were 3 major items covered. I'll try 
to run through those 3, and summarize what to us appeared to 
be the major points. On first reacquiring contact John Young 
reported that they had seen 2 main bus B undervolt conditions — 
as he described it these were transitory events main bus B 
voltage dropping briefly to the point to where it triggered 
a master caution and warning alarm. Normally, main bus B, 
which is one of 2 main busses supplying electrical power to 
the equipment aboard the Command and Service Module, operates 
at about 27 to 28 volts under load. The master caution and 
warning is set to trigger at 26.25 volts, if the voltage drops 
to that level. And in replaying the data tapes, we saw the 
voltage drop to about 26.14 volts. The data tape replay, how- 
ever, showed no indication of a problem with any of the elec- 
trical equipment. One sometimes suspects momentary current 
overloads — a heavy drain of current which would then drag 
the voltage down, but there was no indication that any of 
the equipment was malfunctioning. The one thing the crew 
described that appeared to be coincident with the .voltage drop, 
was the operation of the pan camera. A, however, simultaneous 
data on this camera, when it was operating, showed that the 
camera was functioning normally. At this point after looking 
at all of the data, and considering the loads on both main bus 
A and main bus B, one supposition is that we had a coincident 
series of events, which momentarily overloaded main bus 
B. Such things as heaters coming on simultaneously at the 
same time we had a heavy current drain for the SIM bay acti- 
vities. If this is, in fact, the case, it can easily be 



APOLLO 16 MISSION COMMENTARY M19/12 GET 82: 04 GST 21:58 MC- 27 7/2 



P A.0 remedied by transferring some of the load 

to main bus A -- a simple reconfiguration. And that appears 
to be the most likely cause of the main bus unde rvolt ages , in 
which case we would have no particular problem. One other 
thing that was discussed, was the suit problem. Going back 
to the beginning of this one — Charlie Duke reported last 
night on entering the Lunar Module suited -- getting suited 
up and getting into the Lunar Module that John Young had some 
difficulty getting the suit zipped. The restraint zipper 
closed across the back of the suit — this zipper does not 
maintain the pressure of the suit, but is a load carrying 
zipper that holds all the layers together on the outside of 
the pressure layers. And Duke mentioned in order to minimize 
the problem of getting the suit zipped tomorrow, he would like 
to leave off the fecal containment system. In zipping the 
suit up the first time both the fecal containment system 
and the liquid cool garment were not worn. Duke's feeling 
was that once these additional items were added underneath 
the suit it would increase the problem of closing that zipper. 
And we gave him a go ahead to leave the fecal containment 
system off, and recommend that he make an attempt to get the 
Suit zipped using the normal procedures. John Young suggested 
the possibility of using a pair of pliers that they carry on 
board to assist in it, a recommendation at this time is that 
not be done. Dave Scott, who was by earlier in the evening, 
discussed with the flight controllers a similar problem that 
they encountered, although apparently not quite so severe, 
on Apollo 15. And Dave's analysis of that situation was that 
in zero G it's more difficult to arch one's back without grav- 
ity to help. Arching the back is a method that is used to 
reduce the strain across the zipper so that it is easier to 
get it closed, and it was suggested to Charlie that he make 
every effort to brace himself and get the back arched in order 
to make the job a little easier of getting the zipper closed. 
And we do have a backup procedure that'll be discussed with 
the crew to assist in closing that zipper. If the problem 
arises tomorrow when they're preparing to get into the Lunar 
Module and suiting up. Also CAPCOM Henry Hartsfield discussed 
a procedure with Ken Mattingly for checking out the docking 
latches. One of the 12 docking latches has apparently not 
latched down firmly onto the LM tunnel docking ring. This 
causes no particular concern, but there is some Interest in 
determining why the latch did not close. Mattingly, last 
night, was asked to cycle a device that is connected with 
the latch. This gave the flight controllers an indication 
that the latch, which is cocked prior to docking, was not 
fully cocked, and therefore, did not latch fully. There is 
also the possibility that the latch is broken. In order to 



APOLLO 16 MISSION COMMENTARY h /19 /12 GET 82:04 GST 21:58 MC-277/3 



PAO determine which of these is the case, Mat- 

tingly was given a series of procedures to follow, of which 
W€; hope will provide some information and shed some light on 
whether the latch simply was not fully cocked, or whether it 
is broken or has malfunctioned in some other way. This is 
primarily of concern for future flights. It doesn't 
have a direct bearing on this flight, it's felt that the latch 
will in no way effect undocking and since only 3 of the 12 
Ifitches are required for a firm hard docking, there is no 
pfirticular concern that it will in any way effect the dock- 
ing either. As mentioned previously, we expect to see the 
crew asleep when next we reacquire the spacecraft. That will 
be about 40 minutes. And as Apollo 16 went around the corner 
on the fourth revolution, we showed it in an orbit of 58.7 
by 10,4 nautical miles. At 82 hours 19 minutes into the flight 
of Apollo 16, this is Apollo Control Houston. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k ll9 pl CST 22 :52 GET 82:58 2 78/1 



PAO This is Apollo Control at 82 hours 58 minutes 

We're about one minute away from regaining radio contact with 
Apollo 16, the spacecraft now in it's fifth revolution of the 
Moon. And we expect the crew is in their sleep period at this 
time. They're scheduled to have a 9 hour rest period, beginning 
about 30 minutes ago, while they were on the backside of the 
Moon. However we will have the circuits up live in case they 
haven't begun their sleep period and have any last minute items 
to discuss with Mission Control, before beginning the rest period. 
And network has just called out AOS, acquisition of signal, and 
we see all of the data now suddenly come alive on the television 
display here, the telemetry data from the spacecraft, we won't 
plan to put in a call to the crew, however we will be standing 
by should we get a call from them. 

PAO And the communications engineer says that 

the spacecraft appears to be configured for sleep, the high 
gain antenna is in the proper position, the voice sub carrier 
is turned off, so we'll presume that the crew has begun its' 
rest period. 



END OF TAPE 



APOLLO MISSION COMMENTARY 4-19-72 CST 22:57 GET 83:03 MC-279/1 



PAO This Is Apollo Control at 83 hours 35 

minutes. We now have a little under thirty minutes of 
acquisition time remaining before Apollo 16 goes around 
the corner on the fifth revolution of the Moon and we lose 
radio contact. And It has remained quiet, and no calls 
from the crew, and relatively little activity here in the 
Co::itrol Center - primarily monitoring systems and preparing 
for tomorrow's activities. We're continuing to watch the 
Spacecraft orbit change gradually. We're now showing an 
apogee of 58.8 nautical miles, and a perigee, or pericyn- 
thion more correctly, of 10.5 nautical miles. This crew 
rest period is scheduled to last for about 9 hours. And 
the crew is to be awakened at about 91 hours 30 minutes - 
about 8 hours from now. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kj\^m CDT 23:40 GET 83: 47 MC-280/1 



PAG This is Apollo Control at 84 hours 3 minutes 

now into the flight of Apollo 16. And nearing the end of the 
fifth revolution around the Moon. Now we have about 1 minute 
45 seconds before we loose radio contact with the spacecraft. 
We've heard nothing from the crew. They're in their rest period. 
And all spacecraft systems appear to be functioning properly at 
the present time. We show Apollo 16 in an orbit 10.4 nautical 
miles by 58.8. And at this time in Mission Control we're in 
a mist of a shift handover. Flight Director Gene Kranz and 
his team of flight controllers coming on to replace the Pete 
Frank team. Spacecraft communicator on the up coming shift 
will be astronaut Donald Peterson. And we do plan to have a 
change of shift briefing. We expect that that will start 
in about 15 minutes. The briefing will be in the MSG News 
Center Briefing room. At 84 hours 4 minutes this is Apollo 
Control Houston. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4-20-72 GET 84:52 CST 00:45 MC-281/1 



PAG This Is Apollo Control Houston at 84 hours 

52 minutes into the Mission. We're a little more than 20 seconds 
away from scheduled time of acquisition of Apollo 16. Now on 
its sixth revolution around the moon. We presently show an 
orbit of 58.8 nautical miles by 10.6 nautical miles, meanwhile 
in the Mission Control center, we have had a shift changeover 
of flight control te ams . The white team of flight controllers 
headed by flight director Gene Kranz is now aboard. The 
surgeon reports that he has two of the crew members on his 
blomed, he reported that lunar module pilot Charlie Duke went 
to sleep rather rapidly, whereas command module pilot Ken 
Mattingly was still awake at loss of signal. The crew of Apollo 
16 is now in their rest period, however, we'll leave the line 
up on this front side pass in the event that we do have con- 
versation with the crew of Apollo 16, Our CAPCOM on this shift 
is astronaut Don Peterson. We have acquired data from Apollo 
16 and we'll continue to monitor. This is Apollo Control Houston 
at 84 hours 54 minutes ground elapsed time. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4-20-72 GET 85:20 CST 00:47 MC-282/1 



PAO This is Apollo Control Houston at 85 hours 

19 minutes ground elapsed time. We have some 40 minutes re- 
maining on this front side pass for Apollo 16. Now on its 6th 
revolution around the moon. We've had no communication with 
the crew, presently in their rest period, however, we will 
continue to leave the line up during this front side pass. 
We show Apollo 16 traveling at a velocity of 5546 feet per 
second. Current altitude, 11 nautical miles, the spacecraft 
is presently in an orbit of 58.8 nautical miles by 10.5 nautical 
miles. Spacecraft weight in orbit at this time 76 109 pounds. 
At 85 hours 20 minutes, continuing to monitor, this is Apollo 
Control Houston. 



END OF TAPE 



APOLLO 16, MISSION COMMENTARY, 4-20-72, CST 01:13, GET 85:20 283/1 



PAO This is Apollo Control Houston at 85 

hours and 59 minutes ground elapsed time. At this time 
we've had loss of signal with the Apollo 16 spacecraft as 
it passes above the back side of the Moon. We will take 
down our line at this time and at 85 hours and 59 minutes 
this is Apollo Control Houston. 

END OF TAPE 



APOLLO 16 MISSION COMMENTARY, 4-20-72, GST 02:40, GET 86:46 284/1 



PAO This is Apollo Control Houston at 86 

hours 46 minutes into the mission and we're coming up now 
on acquisition with Apollo 16 now on its seventh revolution 
around the Moon. Apollo 16 is presently in an orbit of 
58.9 nautical miles by 10.6 nautical miles. We expect no 
conversation with the crew on this front side pass. Young, 
Duke, Mattingly now well into their rest period. We will 
leave the line down on this front side pass but we'll bring 
it up should any conversation develope. We do now have 
acquisition with Apollo 16 and are receiving data. At 86 
hours 47 minutes ground elapsed, this is Apollo Control 
Ho us t on . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY CST 03:45 GET 87:52 MC-285/1 



PAO This is Apollo Control Houston at 87 hours 

52 minutes ground elapsed time. Apollo 16 has now passed out 
of acquisition range. We have loss of signal with Apollo 16 
as it passes above the back side of the Moon on it's 7th 
revolution. We show orbital parameters of 58.8 nautical miles 
and 10.4 nautical miles. We had no conversation with the 
crew of Apollo 16 during this front side pass. The crew is 
presently in a rest period. We're at 87 hours 53 minutes and 
this is Apollo Control Houston. 

END OF TAPE 



APOLLO 16 MISSION COMMENTARY, hJlOfll, 04:34 CST 88:40 GET, MC-286/1 



PAO This is Apollo Control, Houston, at 

88 hours 40 minutes into the mission. We're standing by 
now awaiting acquisition with the Apollo 16 spacecraft on 
its eighth revolution around the moon. We presently show 
an orbit of 58.9 nautical miles by 10.6 nautical miles. 
The flight surgeon here in Mission Control reports that 
Command Module Pilot Ken Mattingly and Lunar Module Pilot 
Charles Duke were sleeping very well when he looked at their 
data through the last pass. We are now receiving data from 
Apollo 16. The spacecraft has been reacquired. We're at 
88 hours 41 minutes into the mission and this is Apollo 
Control, Houston, 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hll^jll CST 05:40 GET 89:45 MC-287/1 



PAO This is Apollo Control Houston at 89 

hours 46 minutes into the flight. We now show Apollo 16 
with an orbit of 58.8 nautical miles by 10.4 nautical miles. 
The Apollo 16 Spacecraft has passed out of range on its 
eighth revolution around the Moon. On this past frontside 
pass, we had no conversation with the crew, still in their 
rest period. Our wake-up clock here in Mission Control 
shows that the crew has 1 hour and 43 minutes of sleep time 
remaining before the wake-up call. We're at 89 hours and 
47 minutes, and this is Apollo Control Houston. 



EJJD OF TAPE 



Al'OLLO 16 MISSION COMMENTARY kjl^lll CST 6:27 GET 90: 33 MC-288/1 



PAG This is Apollo Control Houston at 90 hours 

34 minutes into the mission. We now show Apollo 16 in an 
orbit of 58.9 nautical miles by 10.5 nautical miles. We're 
coming up on acquisition of the spacecraft on this the 9th 
revolution. Because we will wake up the crew at some point 
on this front side pass. We will leave the line up alive 
and at 90 hours 35 minutes this is Apollo Control Houston. 
We're acquiring data now. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY MlOlTly 6:28 AM CST 90:34 GET 289/1 



PAO This is Apollo Control, Houston, at 

91 hours 24 minutes into the mission. We're standing by 
now awaiting a wake-up call by Capcom Don Peterson to the 
crew of Apollo 16 . 

PAO We show Apollo 16 presently with an 

apolune of 58.9 nautical miles and a perilune of 10.4 nautical 
mi les . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k / 20 / 12 CST 7:20 GET 91:26 290/1 



CAPCOM Apollo 16, Houston. 

CAPCQM Apollo 16, Houston. 

SC Are you down there this morning, Houston? 

CAPCOM Just fine. How are you 16? 

SC (GARBLED) 

CAPCOM Roger. Got about 3 short items and SIMBAY 

status, if your ready. 

SC Okay, can we hold off on the SIM bay status 

and I'll copy you 3 short items. 

CAPCOM Roger. 

CAPCOM Okay, the first one is based on our evaluation, 

your potassium levels are running a little low, and we'd like to 
recommend that you drink some orange juice this morning. Also, you've 
got a long day a head of you so we'd like to recommend that you eat 
a bit more food. Second item is terminate battery Bravo charge. 
The third item is terminate the j e t - on-moni t o r . 

SC Okay, Don. Okay, Don. Number one I understand 

you comment about the potasium low and all that jazz, we're just 
finishing up breadfast and I think we've eaten almost everything 
that the lemies has to eat, and we've been drinking all the drinks 
every day, and if we get a chance, we'll try to get some more, get 
another juice bag out. We will terminate the battery B charge and 
terminate the jet monitor and I understand the way to do the jet 
monitor is I'll go to, I'll go to the SCS mode (garbled) 37 NOUN 20 
and verify that the NOUN 26 is all zero's again, and I can go back 
to P20, is that correct? 

CAPCOM Stand by one. 

CAPCOM There's not requirement to go to SCS 16. 

SC Okay, I can just call 37 20 without getting any 

firings? 

PAO This is Apollo Control Houston. 91 hours 

30 minutes. That's Ken Mattingly aboard Apollo 16 who has been 
speaking with CAPCOM Don Peterson here in Mission Control. 

CAPCOM 16, just to be sure we're talking the same 

thing to kill the j e t - on -mon i t or , we want to do a VERB 37 ENTER 
30 ENTER, a VERB 37 ENTER 20 ENTER, and zero the NOUN 26. 

Don, I can't get to the updates book where 
that written down, would you read it to me slowly and I'll do 
that terminate right now. 

CAPCOM Okay, it's VERB 37 ENTER 30 ENTER, VERB 37 

ENTER 20 ENTER, Zero the NOUN 26. And, 16, you about 1 minute to 
LOS, and you're looking good. 

SC Okay, and we're taking an extra orange with 

potassium this morning. 

CAPCOM Roger. 

SC Houston, 16, Take a look at that BIOMED off 

of me and see how it, looks, over. 
CAPCOM Okay. 



APOLLO 16 MISSION COMMENTARY hllQjll CST 7:20 GET 91:26 290/2 



sc 


I got it reset, from yesterday. 






CAP COM 


Ken, still looks a little loose. 






SC 


Well, it's not loose. 






CAP COM 


We'll have to take a better look 


at 


it next 


time around, Ken 








SC 


Okay, this is John and the sensors 


are fixed. 


CAP COM 


We've got confusion down here on 


wh 


o we're 


monitoring, John 








CAP COM 


John, the lead we concerned with 


i s 


the sternal 


lead, the one on 


you breast bone. You might jiggle 


i t 


a little bit 



END OF TAPE 



APOLLO 16 MISSION COMME TARY h / 10 / 12 CST 7:30A GET 91:36 291/1 



like 



on 



Jot , 

Okay , 
Ok ay , 

This 
into 



we're doing that. It sure looks 



you might try putting new sponges 



round and 



S C Ok£ 
it's all tight. 
SC 

CAPCOM 
that lead. 
SC 

CAPCOM 
talk about it. 
PAO 

91 hours 37 minutes 
signal with Apollo 16. The last conversation aboard the 
spacecraft was John Young checking on his biomedical sensors. 
We're at 91 hours 37 minutes into the mission and this is 
Apollo Control Houston. 



I did that last night, 
we'll pick you up next 



is Apollo Control Houston at 



the mission, 



We ve had loss of 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hJlO/ll 8:09CST 92:15GET 292/1 

PAO This is Apollo Control at 92 hours 15 minutes 

ground elapsed time and some 13 minutes 12 seconds until Apollo 16 
reiappears from behind the moon in its 10th lunar orbit. 
Gerry Griffin's gold team of flight controllers settled in for 
the day's activities leading up to powered descent and lunar 
landing. The offgoing shift of flight controllers have 
practically all left the room having debriefed their replace- 
ments. There will not be a change of shift briefing. Repeat 
will not be a change of shift briefing, inasmuch as the 
preceding shift was primarily a sleep shift. Apollo 16 still 
in a 59 by 10.6 nautical mile lunar orbit, current velocity - 
o]:bital velocity 5, 355 feet per second, and current altitude 
a1: this point in the orbit 44.8 nautical miles. 11 minutes 
57 seconds to Apollo 16 acquisition. At 92:16 this is Apollo 
Con t r ol . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/20/72 CST 8:21 GET 92:27 293/1 



PAG This is Apollo Control. 92 hours 27 minutes 

into the mission of Apollo 16. Less than a minute away from Apollo 16 
reappearance around the eastern limb of the moon on lunar orbit 
number 10. On this next front side pass, the main concern of the 



crew will be transferring quite a few of the 
equipment into the lunar module, getting the 
for the descent and landing at the Descartes 
6 minutes away, we may be a few moments late 
because of the apparent position of the high 
on the ground by the communications officer, 
tion of acquisition of signal by the tracking network. Flight 
director Gerry Griffin is polling all of his flight controllers on 
the current status and preparation for the landing phase. Getting 
all of the details worked out. Any minor problems, the different 

positions, might have. 
St an din g by . 



pieces of gear and 
lunar module prepared 
landing site, 
getting acquisition 
gain antenna as seen 
Waiting for confirma- 



positions, console 
CAPCOM 
S C 

CAPCOM 

sc 

an d w e ' ve got 



h e re 



process of a little suit donning 
I went to retrack the mass 
came in fine but the mass 



Hello, Jim. 
Morning . 
We 're in the 
one problem, 
spectrometer and gammer ray boom 
spectrometer boom indicates barberpole and has stayed barberpole 
for 10 minutes. I went ahead and enabled the jetts and I'd like 
for you to take a look at the, at the telemetery talk back on 
moon and see if you can suggest something for me to do. 
CAPCOM Okay, we copy. 

- barberpole as a total barberpole. 
Ken . 



the 



SC 

CAP COM 
S C 

CAP COM 



( Garb le) 
We copy. 
Okay . 
16 , th is 



is Houston. We're wondering if 



you've gone through the malfunction procedure of that boom 



retraction on page 
SC 

app rop r i ate . 
CAP COM 
SC 

really appreciate 
you w an t . 

CAPCOM 

CAP COM 
the mass spect boom 
not there already. 

SC 

to ( garbled) . 
CAPCOM 
SC 

CAPCOM 

you had activated all your 
SIM bay configuration. 



1-24 on the systems handbook? 
Well, I looked and didn't fine one 



that was 



Okay, I guess you're right, Jim. 
We're pretty busy as you know, Jim, so 
it if you could talk me through whatever 



Okay, understand. 
16, this is Houston. We'd 
switch to the off position. 



like you to 
That's if 



I ' d 

steps 

put 
it ' s 



Okay, I'll do that and when I do, it goes 

Understand it goes to gray. 
That's affirmative. 

16, this is Houston. We had understood that 
RCS jets. We show you're still in the 



APOLLO 16 MISSION COMMENTARY k 1 20 f 12 CST 8:21 GET ^I'.ll 293/2 



SC Okay, thank you. I have switches with the 

circuit breakers I've left out. 

CAPCOM Roger. 

CAPCOM 16, th Is is Houston. You can go normal 
acquisition procedures on the S-band. 

SC Okay. 

SC Jim, what did you want me to do with that 
high gain? 

CAPCOM We wanted you to go through normal acquisition 
p ro ce dure s . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY A/20/72 CST 8:31A GET 92:37 294/1 



S IM 



n ow , 



16, will you 
You h ave i t . 
6 - never mind. 
Okay, 16. This 
Will you go b ack 



go AUTO on the high gain? 



is Houston. We have 
to retract on the boom 



CAP COM 

S C 

CAP COM 
CAP COM 
bay data 
swit ch? 

S C 

CAPCOM 

CAPCOM 
the talk back 
B arberpo le or 

SC 

Barberpole full. 

CAPCOM Okay, we copy, a full Barberpole 

it partially retracted with inacceptable limits 



Okay, you have retract, Jim. 
Roge r . 

16, this is Houston. Will you check 
on that boom, and tell us whether it's full 
part ial? 

It's the same as it's been, Jim. It's 



We 



s how 
Does 



SC 

that mean your 
CAPCOM 



SC 

OFF position - 

CAPCOM 
retract. 

SC 

CAPCOM 
back to the OFF 
SC 

CAPCOM 
SC 

I could extend it 

CAPCOM 
hold what we have 

SC 

S C 

I've got 
CAPCOM 
S C 



What do you mean partially retracted? 
telemetry point has cinched closer. 
That's affirmative. 

Okay, then I'll put it back into the 
Stand by. Ken. I think we want it in 



I'll leave it 
you could put 



in retract, 
the retract 



sw i t ch 



retract is OFF. 



Okay, 
Okay , 
position. 
Okay , 
Ro ge r . 

You could watch that thing on telemetry - 
enough to clear it and try and retract again. 
Okay, we're within limits. Ken. Let's 



10, 



s o me 



Okay . 

Okay, Jim. On the docking latch number 
observations if you're ready. 

Roger. We're ready. Ken. Go ahead. 
Okay, when I look in under the LM 
umbilical connecter cover, the roller cam looks normal, and 
everything I can see from that side looks correct. When I 
look under the cover on the right side, the probe connector 
cover, I look at the (garble) in the little arm that sticks 
out from the bottom of the can when I compare it to another 
latch, it doesn't stick out as far, in fact the back of this 
part - this innerpiece of the bell (garble) has a part number 
it and it's flush whereas on the other one it sticks out and 
shows the pin, so it looks like it hasn't come over center. 
Sorry I don't have the right part nomenclature. 
CAPCOM Roger, we copy. 

SC If you've got a docking latch on the table 

there somewhere, you can see what I've been looking at. 



on 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/20/72 CST 8:39 GET 92:45 295/1 



CAPCQM Ken, this is Houston. Can you see anything 

that might be abstructing or interfering with that CAM action? 
SC No sir, I can't. 

CAP COM Okay. 

CAPCOM 16, this is Houston. If you've got a POO 

and EXCEPT we'll effect it. Okay just EXCEPT. 
SC You're there. 

CAPCOM Okay 16, this is Houston. You go back to 

f 1 ock . 

CAPCOM 16, this is Houston. Do you copy? 

SC Yes,hegotit. 
CAPCOM Roger. 

SC Houston, we just passed over the good 

landing site and you can see the whole area. Pans out very 
nicely just like the model. 

CAPCOM Very good. Ken. Thank you. 

SC Houston. From my present position -- 

I can't be sure exactly where I am because I just looked out 
the window again, but we passed over a large crater and it has 
3 little domes in the bottom of it with craters and the top 
of them look like very subtle cinder combs. So I'll try to 
mark that guy on the way back. It's one of the cluster of 
two large ones and several smaller ones. 

CAPCOM Roger. We copy. Ken. 

CAPCOM 16, this is Houston. Will you give us 

another reading on that docking tunnel index when you have an 
oppo r tuni ty ? 

SC It is still the same thing, minus 3.5. 

CAPCOM Roger. Minus 3.5. 

SC Re-affirm. 

CAPCOM 16, this is Houston. Will you film the ... 

CAPCOM Go ahead, 16. 

SC Okay. John and Charlie got their suits 

on and they are in the LM. Is there any reason they shouldn't 
go ahead and power up and get some cooling? 

CAPCOM Standby. 

CAPCOM Okay let's proceed. Ken. 

SC Okay we'll proceed. 

PAO This is Apollo Control. Apollo 16 com- 

mander, John Young and Lunar Module pilot, Charlie Duke are 
running almost 40 minutes ahead of the flight plan. And as 
much as they've already donned their pressure suits and they're 
in the Lunar Module, preparing to power it up. Flight plan 
calls for transfer — 

SC (garble) 

CAPCOM Roger. 



APOLLO 16 MISSION COMMENTARY hjlQ/ll CST 8:39 GET 92:45 295/2 



CAPCOM And Ken this is Houston. The reason for 

that undervoltage last night was that the — all the heaters 
just happened to come on at that particular time. 

SC Thank yon, Jim. We were (garble) 

relieve Don at the time. 

CAPCOM I'll talk to you later. 

SC Okay. Did you get my call on the LM 

power, 9307? 

CAPCOM Sure did, 9 30 7. 

PAO This is Apollo Control. Some 25 minutes 

remaining now in this front side pass in the tenth lunar 
orbit of Apollo 16. Before the stilled docked Orion and 
Casper who are on the corner on the western limb of the Moon 
and 9309 still alive on the tenth lunar orbit. This is Apollo 
Con t rol . 

CAPCOM 16, this is Houston. S-band HAWKS, SCI 

switched to off, over. 

SC That's all? 

CAPCOM Roger. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hflQ/ll 9:06CST 93:12GET 296/1 



S C 

an gles , or did 
CAP COM 
SC 

CAP COM 
PAO 



Houston, can I give you some 
you copy them? 

We have them. Ken. 



t arget 



Okay, and we're in the maneuver. 
Roger. 

This is Apollo Control. The maneuver that 
was referred to just then by Ken Mattingly aboard the Command 
Module, Casper, was the maneuver to the undocking attitude which 
has a ROLL 0, PITCH 104, and YAW 0. Just about on time as 
called for in the flight plan, some 14 minutes and 8 seconds 
until loss of signal. This is Apollo Control at 93:20. 

CAPCOM Ken, this is Houston, our plan on the mass 

spec boom is to leave it where it is, and we're going to ask 
John and Charlie to check it after undocking where it is 
requis itione d. 

SC Okay. 

CAPCOM And when I was trying to talk to you before, 

I just wanted to give you the words on that un de r- vo 1 1 age which 
ya'll had last night. The reason for that was the fact that 
all the heaters came on at the same time. Over. 

SC Okay, I guess maybe I jumped the gun, but 

it seemed to me like that master alarm came on instantly when 
I hit that switch and it seemed like the only prudent thing to 
do was to undo what I just did. 

CAPCOM I'm glad to hear that tall thinking. 

CAPCOM And, Ken, if you're - in a few minutes I can 

give you a flight plan update, a very short one. 

SC Could you hold it. I'm in the middle of a 

P90 and canister change, 

CAPCOM Okay. 

PA.0 This is Apollo Control we have confirmation 

that the communications system aboard the Lunar Module is 
activated. We're beginning to get data out of the LM. 

Ken, we have ARIA and select the S-band antenna. 
Okay, Jim, you've got it. 

Very good. We're reading you loud and clear. 
And you're really beautiful too. We are 
We'd have been a little bit further along but 
with John's zipper today. Background noise - 



CAPCOM 
SC 

CAPCOM 
SC 

tape 3676. 
had trouble 
GARBLE. 

CAPCOM 
SC 

CAPCOM 



on 

w e 



GARBLE. 
GARBLE. 
GARBLE. 



Background noise. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY MlO/ll CST 9:21 GET 93:27 297/1 



SC How do you read, Jim? 

CAPCOM Casper, this is Houston. How do you read? 

PAO This is Apollo Control. 5 minutes away from 

loss of signal as Apollo 16 passes behind the moon. Lunar module 

cabin now showing at 5.02 pounds per square inch pressure. Suit 

pressure 4.98 for both men. Cabin temperature 68° F. 



CAP COM 




Orion this is Houston How do vnn rp^^ri'^ 


ORION 






CAPCOM 




little noise 


but 


wti aon L Lnc oig Qisn out cnGrG* 


ORION 




Ok ay, we got signal trace of about 39 on the 


AFT OMNI. 






CAPCOM 




We didn t understand Jy OMNI (.garbled and heavy 


background noise) 




ORION 




(.garble dj 


ORION 




N oi sy isn't it. 


ORION 




I. garb led.; 


ORION 




(.garbled; 


CAP COM 




16, this is Houston. You 2 minutes LOS. 


s c 




Okay, thank you. We've got it. 


SC 




Can you read me, Charlie? 


S C 




Yea. 


s c 




I don't read you. 


SC 




You don't have your audio breaker in, do you. 


SC 




Ye a. 


SC 




Did you turn on your stuff? 


SC 




Yea. 


SC 




How's that. How's that. 


SC 




That's better. Okay, thank you. What was that 


How did you 


fix that. 


SC 




I just put my microphone to my mouth. 


SC 




Okay fine. Talk down for a little bit. 


SC 




I've got my master volume up full. 


SC 




Me too. 


S C 




Okay, where are you at, Charlie? 


PAO 




This is Apollo Control. We've had loss of 


signal as Apollo 


16, still docked at this time, passed behind the 


moon during 


the end of the 10th lunar orbit. The crew of Apollo 16 



considerably ahead of the time-line and getting the lunar module 
manned and checked out. All three crewmen suited at this time. 
Approximately 46, 47 minutes until acquisition. We'll come back 
up at acquisition at the start of lunar orbit revolution number 11, 
lunar orbit number 11, and at 93:35, this is Apollo Control. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY } 1^ 1 11 CST 10:15A GET 9421 298/1 



PAG This Is Apollo Control. 94 hours 21 

minutes into the flight of Apollo 16. Less then a minute 
away now from acquisition of data and voice from the space- 
craft. Coining around now part way through the eleventh 
lunar revolution. The communications with the 2 spacecraft 
have been split at this time, that Is a separate CapCom 
or spacecraft communicator. We'll be talking to Ken 
Mattingly aboard Casper. Ed Mitchell is the command module 
CapCom. Jim Irwin remains as CapCom to communicate with 
Ycung and Duke aboard Orion. During this eleventh revolution, 
we have acquisition of signal. Let's stand by for communica- 
tions with Orion. 

ORION Hello Houston. Old Orion, how do you 

read? Over. 

CAPCOM 
and clear. 

ORION 
th e ch eckl i s t 



Orion, this Is Houston. Read you loud 



Okay, 
We ' ve got 



Jim . We ' re 
the PNGs up 



zipping right on through 
the docked course 



alined done, the landing gears deployed and the only thing 
we haven't done is really what you need to see. And we're 
ready to start in on the S-band checks and bring up the 
steerable. Over, 

CAPCOM Okay Charlie. 

ORION Okay, while guidance is - let me give 

you some angles. We had a VERB 06 NOUN 20 that was done 
ar.d 9420 20. The LM angles were plus 29465 plus 2 8996 plus 
35502. How do you read, Jim? 

CAPCOM Roger, we copy you. Copy of the LM is 

plus 29465 plus 28996 plus 35502. Over. 

ORION That's affirmative. The command module 

are plus 00269 plus 10931 plus 00472. Over. 

CAPCOM Okay, copy. Plus 00269 plus 10931 plus 

00470. Over. 



got 



ORION 
good comm 



That's affirmative 



It sounds like we 



on 



primary stand PR and secondary power amp, 



ve 
I'm 



going secondary S-band PR and primary power S. Over. 



CAPCOM 


Roger. We're standing by. 


ORION 


Ok ay . ( ga rb le ) 


CAPCOM 


Casper, this is Houston. We want narrow 


on the S-band. 




ORION 


Okay, Jim how do you read? Over. 


CAPCOM 


Orion, this is Houston. Go ahead. 


ORION 


How do you read, Jim, Over. 


CAP COM 


I read you, but there is a lot of noise 


and background. 




ORION 


(garble) Okay, we have primary (garble) 



o J" activation time as 
AGS support constants 



933330 and we're standing by for the 
Over. Or let's do the steerables first 



APOLLO 16 MISSION COMMENTARY h I Id / 71 CST 10:15A GET 94 :21 298/2 

ORION and get you the downlink OP memory corap. 

Ove r . 

CAPCOM Okay, we're standing by for the steerables. 

ORION (garble) 

END OF TAPE 



APOLLO 16 MISSION COMMENTARY, h/lQ/ll 10:22CSt 94:28 GET 299/1 



t or 



1 ow 



9 9 



SC 

CAPCOM 
you. 

CAPCOM 
bit rate 

ORION 

CAPCOM 



Loud and clear. 
Roger, Casper. 

Orion , this is 



I have a PIPPA BIAS update 



and then bring up 
Okay . 

Orl on , this 



the 



Houston. We 
high beam. 



want you to go 



is Houston, Pitch should be 



ORION 
c an ' t - wh en 
move on the 
Over. 

CAPCOM 
ORION 
CAPCOM 
AGS abort 
ORION 
CAPCOM 
us 603 83 plus 
ORION 
83 00 565 
CAPCOM 
ORION 
CAPCOM 
ORION 
CAPCOM 
ORION 
closed position 



Okay, Houston, we got the S-band OMNI, I 
I move the yaw drive the yaw indicator does not 
steerable and I do not hear any grinding noise. 



th e 



P 
6 03 



you 



327 



05 11 plus 
12 , o ver . 
224 605 11 



12. 



294 19 



294 19 



Okay, copy. No response on the yaw drive 
That's affirmative. 

Whenever you're ready, Charlie, I'll read 
p r oce ss . 

Okay, go ahead. 
Okay, 22A beginning plus 6 
00 565 minus 327 76 minus 544 
Right. Copy starting with 
76 5 44 12 , over. 

Okay. On 6 73 it was minus 544. 
Rog, that's what I got minus 544 
Good readback. 
Hous t on , Orion . 
Go ahead, Orion. 

Okay, I can't seem to get the yaw out of 
minus 12 on the indicator, and I cannot hear 
this dial just like - and Ken's got the 
follows . Ove r . 

CAPCOM We're reading you, Charlie. We want you to 

go through a little procedure here to essentially get you back 
to a start position. We want you to go to slew on the S-band. 
Check both S-band circuit breakers on 11 and 16. Select pitch 
at minus 75 and yaw of minus 12, wait 30 seconds and then go 
to an acquisition and we'll have some angles for you. 



th e 

it; drive when I move 
Ge;rry drive (garble) 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kH^Ill CST 10:28 GET 94 : 34 300/1 



SC Okay, that's where we are, 

CAPCOM Right, Casper, this is Houston, go to ACCEPT. 

And Orion the angles for your S-band PITCH are 99 and YAW of 16. 

ORION Copy, 99 and 16. 

CAPCOM And Casper, this is 

for you whenever you're ready to copy, 
it's PLSS 14 54, data 03521 PLSS 14 56 , 

CAPCOM Okay, on the 14 5 6 , 

back, Ken. The data is 762 74. Sounded 
And Casper, this is Houston with a back 
y ou' re re ady . 

Houston, this is Orion, 



Houston. I have a bias 
Okay, on the (garble) 
data 76274, over, 
couldn't hear you read 
like a good read back, 
for you whenever 



load 



Orion, this is Houston, 



(Heavy background 
(Garbled and heavy 



(Garbled) 

Going back up, how do 
Roger, we're reading. 



you 
but 



re ad ? 
still 



excess ive 



Okay, was it as noisy on the other transmitter 
amp ? 

I think it's about the same, Charlie. 
Okay, be advised we went throught the 



ORION 
noise. ) 

CAPCOM 
background noise). 
ORION 
ORION 
CAPCOM 
noise down here. 

ORION 
receiver and power 
CAPCOM 
ORION 

steerable set 2 on page 362, and the YAW still does not indicate 
that it's moving, and we cannot hear a grind. No, with those 
angles I get a, that I got of 99 is minus 12, I get a signal 
strength of greater than 3. I went track mode to auto and 
uplink, and when I went track to auto, it sounded like the thing 
is setting up there just constantly oscillating and the PITCH 
needle varies plus or minus 10. The sigma streak stays pretty 
constant. In fact, no matter what position I select on the 

sigma streaks stays up around 38 or so. 
Roger, we copy . 

Okay, could we press on with the AFT OMNI and 
ove r . 

Yea, let's press on. 

Okay, can you get an E-memory dump. We're 
E-memory dump. 

St and by one . 4 



the 



S-band antenna, 

CAP COM 

ORION 
it's configuration, 

CAPCOM 

ORION 
ready for the 

CAPCOM 
END OF TAPE 



AFOLLO 16 MISSION COMMENTARY kll^lll CST 10:33 GET 94:39 301/1 



CAP COM 
bit r ate . 
SO 

the OMNI? 

CAP COM 
SC 

we'll go on and do 
CAPCOM 
S C 

Okay, to do the P52 
SC 

into the darkness, 

CAPCOM 
for you now John, 
ycu'll be able to 

SC 

SC 

SC 

SC 

SC 

CAPCOM 
P27 for you, one 
SC 

CAPCOM 

go back to slew and place the antenna 
Minus 75 and minus 12, Just leave it 



Okay let's bypass that cause we need high 



Okay you can't get a HIGH bit rate on 

Not until we can get through the (garble). 
Okay. You will bypass the uplink? And 
the -- the acid battery checkout. 
( garble ) 

Okay is it okay to the 
as we get into 
can we do the 



Ok ay w e ' re 
have to put 



as soon 
Houst on , 
, over? 

St an dby . 
but you'll 
proceed. 

Ro ge r . ( garb le) . 
Can ' t us e th at. 
Here's the P27 PAD. 
Where's the G&C check list? 
( garble) 

Okay Orion, this is Houston, 
for REFSMMAT and the others are 
Okay, go ahead. 
Standby one. Orion we would 



P52 without the -- 
darkness here? 
P52 when we get 



preparing a REFSMMAT 
it in manually. Then 



I h ave 
state vector. 

like you to 



for slew 
th ere . 



SC 

got it. 

CAPCOM 
this P27 update for 

SC 

CAPCOM 
66315, 75546, 71001, 
30651, 64233, 64471, 



position. 

Tell them okay we've got it. — Okay 



we 



Charlie when 
the REFSMMAT 



you re ready to copy, I 
and state vector record 
I'm ready to copy. 

Okay, index is 2 4, 017, 31 , 125 , 60, 
47526, 02044, 04020, 70164, 73753, 
65647, 63433, 74021, 76063, over. 



h a ve 



22624 
15651 , 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kjl^lll 10:30 CST 94:44GET 302/1 



ORION Okay, readback index 24, Index is 24 01731 

12560 22624 66315 75546 71001 47526 02044 04020 70164 73753 
15651 30651 64233 64471 65647 63433 74021 76063. 

CAPCOM Okay, that's a good readback. I have your 

state vector for you when you' 

ORION Roger, go. 

CAPCOM Okay, if you're 

state vector. Index 21 015 01 7775 77776 
50 001 55 206 21 201 11 314 50 00 662 172 
04076 171 20. Over. 

CASPER Okay, state vector. 21 index 015 01 77775 

77776 576 02 00 301 374 50 001 55 206 21 201 11 314 50 00 662 
172 60 76 004 552 26 04 176 171 20. 



re re ady . 

re ady , 



Charlie , 
5 76 02 00 
60 76 004 



on the 
301 374 
552 26 



CAPCOM 
CASPER 
SC 

CAPCOM 

CAPCOM 
whenever you are 

CASPER 

CAPCOM 
for the S-band. 

ORION 

CAPCOM 
antenna circuit 
try acquisition 

ORION 

CAPCOM 
breaker and try 

ORION 



Right on item 20 it's item 
That's what you've got. 

I have 040 76. 



040 76, over. 



That ' s what 
Ro ge r . 
Ori on , 
all ready 
Okay , 
0 ri on 



this is Ho us t on , 



I have a setback 



what do you want? 
this is Houston with 



another procedure 



Ro ge r . 

Roger. We want 
breaker on panel 11. 
again . 

Roger. It worked. 
After 1 minute you 
an acquisition. 
Rog. 



you to open the S-band 
wait 1 minute and then 



can close the circuit 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kll^lll CST 10:43 GET 9A:49 303/1 



SC 
SC 
SC 
SC 
SC 
SC 
SC 
SC 

state vector by 
numbers, right? 

SC 

CAP COM 
SC 

a flash on 24. 
SC 

The VERB 71 and 
okay ? 



017 31 



(Garbled) As for state vector, okay. 
We'll get VERB 74. 
VERB 71. 

VERB 71. Enter. 
Enter. 24 enter. 
2 4 en te r . 

It doesn't say that. 

Okay, Houston. How do you, you load this 
a VERB 71, and then a 24 enter, then enter the 

No, that's the REFSMMAT. 
St an d by . 

State vector's the 240 cut. See, we've got 

I guess you do a 24, you're going to get it. 
then you've got 24 index. Now, starting with 1174, 



that 



CAPCOM 


Orion, this 


is Houston. Roger, you should 


: existence as 


dead up on the 


PAD. 


SC 


Un ders t and. 


VERB 71 then a 24 enter, then a 


. enter, an d so 


on . 






CAPCOM 


That should 


b 


e cor re ct . 


SC 


Ok ay . 






SC 


01731 enter. 






S C 


Okay. 






SC 


12560 enter. 






SC 


Enter. 






SC 


22624 enter. 






SC 


Ent e r . 






SC 


66315 enter. 






SC 


Enter. 






SC 


75546 enter. 




No, 755 - 


SC 


755 - 






SC 


4 6 enter. 






SC 


4 6 ente r . 






SC 


71001 enter. 






S C 


En t e r . 






SC 


47526 enter. 






SC 


Okay, enter. 






SC 


02044 enter. 






SC 


Enter. 






SC 


04020 enter. 






SC 


04020 . 






S C 


Yea. 






SC 


Ok ay . 






SC 


70 1 61 enter. 




Wait a minute. Have to take 


b ack . 








SC 


We're not allowed to do that. 



APOLLO 16 MISSION COMMENTARY kjl^lll CS T 10:43 GET 94:49 303/2 



SC 

Throw it out, 
SC 

CAPCOM 
SC 

CAPCOM 
entries . 
SC 

h e re . Go ah ead 

SC 



Okay, we'll go back and change that later. 
73753 enter. 
73 - 

Orion, this is Houston. 
7 - 

A reminder of a VERB 33 at the end of your 



6 34 33 enter. 
76063 enter. 



Rog. Understand. We've got a hot mike over 
What are you on, 1207. 

Okay, (garble) okay, 15651 enter. 

SC 51 enter. 

SC 30651 enter. 

SC Enter, 

SC 64233 enter. 

SC Enter. 

SC 64 471 enter. 

SC Go. 

SC 65647 enter. 

SC Enter. 

SC 74021 enter. 

SC 6 what? 

SC 6063 enter. 

SC Go . 

SC Yea, a mistake on 70 - okay, let me see that 

SC It says delete. We got to check it. 

CAPCOM Okay, Orion, this is Houston. We're looking 
at page 1-26 in the G&N dictionary to review the data. 
SC 

th at ' s w rong • 
SC 

CAPCOM 
n umb e r 13. 
SC 

Jim . 



Roger, so are we. Okay, and we've got one 
Yea. 

Yea, we heard that, and we believe that it's 
VERB, oh, let's see, it's number 13. We concur 



SC 
SC 
SC 
S C 
SC 
SC 
SC 
SC 
SC 
SC 



Ente r . 
Enter. 

Okay. Fire one data. NOUN 15. 

Ente r. 

Enter. 

Ente r. 

Enter. 

(Garbled and heavy background noise.) 
Ente r . 

NOUN 15. NOUN 15 and enter. There we go. 



Okay. Okay, let's review it. 

SC Okay, 0731. 

SC Yea. 



A;?0LL0 16 MISSION COMMENTARY kJlQlll CST 10:A3 GET 94: 49 303/3 



SC Go ahead. 

SC Oh darn. You've got to enter every one of 

those. VERB 1 NOUN 1 enter. 117 pre-enter. NOUN 15 enter. 
SC Enter. 

SC Okay. Now enter for each one, okay, now that 

one's correct. Now enter again. Okay, 12560. Okay, 22624, 66315 
75546, 71001, 47 enter. 47526. 

SC Go. 

SC 62044. 

SC Just a moment. That Isn't what it says. 

0;i04A. Okay, mark that one. It's wrong. 

SC Okay, let' s change it right now. 



END OF TAPE 



APOLLO 16 MISSION 


COMMENTARY 4/20/72 10:50CST 94:56GET 304/1 


ORIon 


Change data load component identifier - 


correct data E. Okay, okay. 


CAP COM 


Okay, Orion, this is Houston. Line 11 should 


be 0 2 044 , over. 




ORION 


Okay, feels good. 


ORION 


4020. 


ORION 


Yeah, that's what's wrong. 


ORION 


Okay, fix it. 


ORION 


Okay. Unit component identifier 13. 13 and 


I think it's NOUN 


- Hey, Jim, on the checklist when it says 


load component identifier, we got — 13 is wrong -- what do we 


load in there? 




CAPCOM 


A 13 ENTER. 


ORION 


Okay. 13 ENTER, Okay, load 70 70 0164 


ENTER and the next 


one is 15 - 


ORION 


I don't think it took. 


ORION 


Skip one . 


ORION 


Hey, why don't you do the RCS p re ss uri z ation 


an d I ' 1 1 do the ( g 


arb le ) , 


CAPCOM 


Orion, this is Houston, we'd like you to close 


that circuit breaker and try an acquisition on the steerable. 


ORION 


Okay, it worked. 


ORION 


Hey, Jim, the yaw is still not working. 


CAPCOM 


Understand yaw is still not working. 


ORION 


It's affirmative. 


ORION 


You doing it over? All right, good idea. 


( garb le) 


ORION 


S ure . 


ORION 


Okay, lodging feet has got me go. 


ORION 


( garb le ) 


ORION 


I'll get it. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k/lQlll CST 10:55 GET 95:01 305/1 



s c 


Okay Houston. We're pressurizing RCS 


now . 


CAPCOM 


Roger. I understand you're pressurizing 


RCS ? 






CAPCOM 


Okay, Orion, your RCS press looks good. 


SC 


(garble) through the P52 , Ken. 




CAPCOM 


Roger. 




SC 


Okay it's in. (garble). 




SC 


(garble) got translation report yet. 


Ok ay , 


(garble) off. 


(garble) . 


SC 


Okay Houston we're ready for the RCS 




checkout. I guess we still don't have HIGH bit rate. 




SC 


Houston, over. 




SC 


Houston this is Orion, over. 




CAPCOM 


Orion, this is Houston -- (garble) 




SC 


Ho us ton. 




SC 


This is Orion, over. 




CAPCOM 


Go ahead, Orion. 




SC 


(garble) they are over. 




SC 


No. 




SC 


Do you want us to open the SSP's. No 


don ' t 


do that. (garble). 




CAPCOM 


Standby, Charlie. 




SC 


Excuse me. (garble) 




SC 


(garble) that was what he said, wasn' 


t it . 


S C 


That ain't right. 




SC 


We're going to puff all the RCS into 


the aft 


t ank . It looks 


like to me . 




SC 


Well I just closed it again. 




SC 


Go od. 




CAPCOM 


Okay Orion, the RCS pressure is creaping 


up on system A. 






SC 


Okay it looks all right here (garble) 




SC 


Go ahead, Casper. 

Roger. We're not going there yet. I 




S C 


'11 


tell you when. 




CAPCOM 


Orion, this is Houston. Do you read 


that 


system A manifold pressure? 




SC 


Roger. System A manifold pressure is 




195. 




CAPCOM 


Copy 195. 




SC 


190. Make it 190. 




CAPCOM 


Roger, 190. 




SC 


Thanks, Charlie, you're a genius. 





END OF TAPE 



APOLLO 16 MISSION COMMENTARY h/lQlll GST 11:00 GET 95:06 306/1 



ORION 
ORION 
ORION 
ORION 
ORION 
ORION 



(garble) 
Did you? 

Ok ay . We got it. 

Want me to check the other one too? 
Yes , 

Houston, it looks like parts of the manifold 



pressure -- I hear you're speaking up again, that's why we're 
holding it. 

SC Okay, we -- it does look like it drift 

5 p 0 unds . 

ORION 

CAP COM 
do a P52 here . 

ORION 

ORION 

ORION 

ORION 
last antenna. 

ORION 

ORION 

ORION 



We do a P52. 

Okay, Ken, stay at mid deadband. We'll 

(garble) grand slope. 
Okay? 

Yes. What do you need, Charlie? 
Let me know when we're 37 up on the 



(garble) VERB 32, slowed 3 35 (garble). 
P52 -- can it be P53. 

(garble) Houston, we want (garble) AS 
and (garble) open and under no situation do we want the 
(garble) pressure to exceed 180. 

Ok ay . 

Okay, we closed it. It's (garble) expression 



CAP COM 

CAPCOM 
is 170 now. 

ORION 

CAPCOM 
pe rcen t. 

ORION 

ORION 

ORI ON 

ORION 

ORION 

ORI ON 
It would be -- 

ORI ON 

ORI ON 

ORION 

ORION 

CAP COM 
you do the P52 

ORION 

ORION 

CAPCOM 

ORION 



We copy . 

And RTS in 180 and we're down to 85 

We get what, Charlie? 
P52 . 

( garb le) 

(garble) or whereever it is. 
80 on the first turn. 

Okay, we can't do a P52, we have to do a P5 3 

( garb le ) 
No. 

How do you know? 
I'm looking at DOD. 

Orion, let's do that state vector in before 

It's all in , Jim . 
Ok ay . 

We understand you already have it done. 
32 en te r . 



APOLLO 16 MISSION COMMENTARY k jlQ 111 CST 11:00 GET 95:06 306/2 



ORI ON 


32 enter. 




ORI ON 


There you 


go. 




Got it? 




ORI ON 


We go over 


to the next display, right? 


ORION 


( garb le) 




ORI ON 


(garble) let's do again (garble). 


ORION 


373 enter. 




ORION 


32533 enter. 


ORION 


(garble) 




ORI ON 


353. 




ORION 


Okay . 




CAP COM 


3 31. 




ORION 


331. 




CAP COM 


Yes . 




ORI ON 


You got it 


7 


ORI ON 


We got to 


check the light control, Chai 


ORI ON 


Yes . 




ORI ON 


(garble) 




ORI ON 


There you 


go. 


ORI ON 


(garble) 




ORI ON 


Yeah . 




ORI ON 


(garble) 




ORION 


33195. 




ORI ON 


Again . 




ORI ON 


33197. 




ORION 


Again . 




ORI ON 


33 -- let 


me check that again. 


CAP COM 


Ok ay . 




ORI ON 


Let me check. 


CAP COM 


You got it 


in, I'm sure of it, Charlie. 


ORI ON 


33195. 




ORION 


Commence 33180. 


ORION 


8? 




ORION 


33180 . 




ORI ON 


(garble) 





END OF TAPE 



APOLLO 16 MISSION COMMENTARY kJlQ/ll 11:06 CST 95:12GET 307/1 



10 



the 



35 



ORION 
ORION 
GARBLE. 
ORION 
ORION 
CAP COM 
(garble) 
ORION 



It returned. 
Ok ay . Mark . 
90 16990. Mark 



07 and 170 78 



16950. 170 
165 90 16990. Mark 21 enter. 

Why don't you let GARBLE. 
Heavy background noise - GARBLED. 
Orion, this is Houston. Will you check 
radar operating (garble) 

They're open. Do want the number 



CAP COM 
SC 

CAPCOM 
be closed at this 

ORION 

CAPCOM 

ORION 
(garble) is closed. 

CAPCOM 

ORION 

ORION 

ORION 

(garble) can we move 
on a star. 

CAPCOM 

CAPCOM 

ORION 

ORION 
you in a minute. 



We copied 
(garble) 
Okay, the 
time . 

Ok ay . No 
Ok ay . We ' 
Okay, the 

(garble) 
Ok ay . 
(garble) 
Hey , Jim. 
it out of 



on th e 



that. We know they're open, 
rendezvous radar operator should 
good. 

re closed and stand by (garble), 
rendezvous radar operating 



We got the 
the way or 



rendezvous radar 
can we place it 



S tand by . 

Go ahead and move it back. 
Okay. (garble) 

We're still doing a P52. We'll get to 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h j 1^ 1 11 GST 11:12 GET 95:18 308/1 



S C 

CAPCOM 
STS problem. 
80 p e rcen t . 
go ahead and 
180, over. 

SC 

SC 



( garble) . 

Okay, Orion, this is Houston. 
We want you to transfer out System 
(garble) transfer out (garble). We 



On the 
A down to 
want you to 



transfer now, but (garble) the pressure buildup 



(garb le) 



p ress ure 
SC 
S C 

Plus 26118, 
SC 
SC 
SC 
SC 

16010 (garble) 
SC 
SC 

CAPCOM 



We copy . 
Okay (garble) 
155 . 

Okay Charlie, 
(garble) plus 



80 percent and (garble) 



(garble) 
260, 118. 



260 plus 12, 



Plus 26117 (garble). 
Okay. 

(garble) 30. 

160 17. Walt a minute, 



6057 (garble) 



16182. (garble) 



to 
t o 
on 



16092 (garble) 
Okay . 

Houston (garble) 93 -- 
Orion, Houston (garble), 
do that (garble) check on the back side, 
use that System A (garble) with that is 

open the (garble) — 
(garble) . 

approximately (garble) you'll just be 



We 're going 
We ' d like you 
to close a SOB 



an d to 



System B 
SC 

CAPCOM 
using System A. 
SC 

CAPCOM 
back side, we want 
to close the main 

SC 



Say that again, Jim. 

Roger. For your (garble) check on the 
you to use system A. So we'd like you 
SOB, System B and open the cross field. 
All right we copy. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 1^/20/12 CST 11:17A GET 95:23 309 /1 



ORION 
ORION 

We ' d like an 
CASPER 
ORION 

the park we' 
ORION 
ORION 

for me . 

ORION 
CAPCOM 
ORION 
CAPCOM 

p le te d , you 
ORION 
ORION 

di dn ' t copy 

n o un 6 ' s are 



Roger, we copy, (garble) 
Okay, Ken. We no longer need S-band. 
0 6 n o un 2 0, 

Roger. 5 4 3 2 1 Mark. 

I know why that was, when we started 
re in that hold, see. 

And it parked just to go there. 

That's right. Okay read those numbers 

4933 - 

Orion, this is Houston. 
289 225. Go ahead. 

Roger 491. As soon as you get the P52 
for undo eking, 
we've already completed it. 
Jim, On the torquing angles, we 
less than 1/2 a degree and our 
for command module plus 268 plus 



have the dope 
Okay , 
Okay , 
but th ey w ere 
9 52 3 and 24 



lOy 19 pi us 005 


00503 noun 29338 enter gimbal 28925 35491 


and the torcjue 


was 


about a minute before that on the P52. 


ORION 




Okay, and we're ready to go to RCS 


che ck out ? 






ORION 




Okay, guidance control P 


ORION 




A. 


ORION 




Okay, guidance control 4 jet 


ORION 




4 jet. 


ORION 




Antenna control (garble) 


CAPCOM 




Okay, Orion, we copy that. 


ORION 




Remote control both bands in hold. 


ORION 




Remote control in hold 


ORION 




Remote control in hold. 


ORION 




CHS in 4 disable. (garble) 


ORION 




Ken, we need wide deadband and enable 


hold. 






ORION 




We need wide deadband and enable hold. 


ORION 




Wide deadband attitude hold. 


CASPER 




(garble) 


ORION 




Okay, we're going to RCS checkout. Ken 


verb 76 . 






CASPER 




Go. 


CAPCOM 




Roger , we copy . 


ORION 




Okay, verb 11 now Ken, ENTER, 5 ENTER 


Okay, command 


TCA, 


UP (garble) Okay, that's okay, we're 



not on the firini 
ORION 
CASPER 
CAPCOM 
ORION 
f o rwa rd 



line. NOUN 25 
Good. Okay, 



let me ( garb le) 



It 



all 



Up 



page 



Good 



Command go 



yours Charlie, 
(garble) from LOS. 
Go right, right Jim? Left, 
one. Good. Good. Okay, let 
11 attitude direct closed. 



Good, 



Good . 



Good one . 
me turn the 



APOLLO 16 MISSION COMMENTARY CST 11:17A GET 95:23 309/2 



CASPER Attitude direct CLOSED. 

ORION Verb 77. 

CASPER Verb 77. 

ORION Verb 15 noun 01 ENTER. 

CASPER Roger. Noun 01 ENTER. 

ORION 42 ENTER. 

CASPER 42 ENTER. 

ORION Okay, noun control right. (garble) okay, 

left go right, no you don't go back, go left, good number pick 
up. Good number (garble) That's a good number. Go right. 
Good number. Go left. Good number. Pick it up again. Good 
number. (garble) 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY ii/10ll2 11:22CST 95:2 8GET 310/1 



PAO This is Apollo Control. We've had loss of 

signal toward the end of the 11th lunar revolution of Apollo 16 
still docked at this time, however by the time that the two 
spacecraft come around the front side of the moon again at 
the start of the 12th revolution they will have undocked. I 
have a schedule of ground elapsed time of 96:13, about 4 minutes, 
correction 6 minutes prior to first acquisition on orbit 
number 12 as the spacecraft went around the corner. Duke and 
Young were conducting the reaction control system hotfire 
checks aboard lunar module Orion. There has been some difficulty 
in getting the steerable S-band antenna on Orion to perform 
particularly to yaw to the proper settings for providing good 
communications to earth. However, for revolution 13 which is 
the landing revolution we will have the 202 foot, 2 10 foot large 
communications dish at Goldstone, California in acquisition of 
the spacecraft and all the high bit rate data, voice and all 
of the forms of communication with Orion can be handled through 
the OMNI antennas, provided we do have the 210 foot antenna. 
There was some imbalance between reaction control system regu- 
lator pressures between systems A and B that was the reason 
why the crew was instructed to open the cross beat to allow 
some of the propellant from system A to go into the ascent 
propellant storage tanks. The propellant is not lost in this 
operation. It merely is transferred to another tank. Also the 
crew is instructed to use system A only for the RCS hotfire, 
also to take some of the load off of the RCS system A. We're 
some 45 minutes away from acquisition in revolution number 12 
at LOS Apollo 16 at an orbit measuring 10.3 by 58.9 nautical 
miles and at 95:32 ground elapsed time, this is Apollo Control. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kjl^lll CST 11:39 GET 9 5:45 311/1 



PAO This is Apollo Control at 95 hours, 45 

minutes ground elapsed time. Some 31 minutes away from 
a<:quisition of Apollo 16 as it starts around the front side 
of the moon on orbit number 12. To summarize the apparent 
problem with the lunar module steerable antenna, if by the 
time of power descent and landing the problem has not sorted 
itself out and the antenna is, indeed, out of commission, 
right now, it appears that the crew cannot get the antenna 
to rotate In the yaw movement. It will be possible for 
all data invoice, high bit rate data, to be relate to 
earth through the OMNI antennas starting with revolution 
number 13 which is the landing revolution. The 210 foot 
antenna in Goldstone, California will be the prime site. 
There's no apparent concern here in Mission Control with 
the potential loss of the steerable antenna. Some mention 
as; been made of the fact that the meters that indicate 
antenna position sometimes fail or hang in the one indica- 
tion, when actually, the antenna is properly rotating, but 
over the next two revolutions, this situation should sort 
Itself out. At any rate, loss of the antenna does not 
mean that the landing will be aborted. We're still in a 
go situation. And at next acquisition, the two spacecraft, 
Ciisper and Orion, will have been separated by some 6 minutes 
prior to acquisition. 28 minutes now until acquisition of 
signal from Casper and Orion. At 95:48, this Apollo Control. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h/lO/ll CS T 12:09 GET 96:15 312/1 



PAO This is Apollo Control. 96 hours 15 minutes. 

About 50 seconds now away from acquisition of signal with Orion 
and Casper coming around from the backside of the moon. Separately 
this time. Standing by for confirmation from the network controller 
that the tracking station does have data and down length from the 
two spacecrafts. There will be some trouble shooting around this 
REV on the steerable antenna on Orion, and a further check out of 
the discrepency in regulater pressures on the lunar module re- 
action control system thrusters. We have AOS confirmation from 
network controller. Let's come up on the air-ground circiut to 

wo r ds . 
Orion , 
Ro g e r . 
Roge r . 

Okay, Jim, it was little rushed but we got 
thing bad is I got a pack full of orange juice. 

Okay, we copy, and we'd like for you to go 
procedure here to get the S-band locked up with 



first 



monitor the 

CAPCOM 

ORION 

CAPCOM 

ORION 
done . The only 

CAPCOM 
through another 



this is Houston. How do you read. 
5-5 Jim, and we're sailing free. 



1 1 



y o ur 



John . 



rate. Would you like to take a few notes. 
ORION I understand. Stand by one. 

ORION Stand by one, Jim. 

ORION Okay, we're on one mike still, 

ORION He told us to go ahead. 

ORION Okay, Jim, go ahead. 

CAPCOM Roger, we wanted you to put the steerable at 

PITCH minus 75 and YAW minus 12. In other words, the stowed 
position. We'll track mode slew, wait 30 seconds, and then 
go PITCH of plus 63 YAW of minus 32 and antenna S-band slew. 

acquisition. Over. 
Okay , we copy . 

And Orion, this is Houston, we're - 



Proceed with normal 
ORION 
CAPCOM 
ORION 
CASPER 
ORION 

at that antenna, the 



Hey, Ken. 
(garbled) 
Okay, look 
steer able 



going to move 

CAPCOM 

ORION 

CAP COM 
time . 

ORION 

ORION 
closed, and that's 

CAPCOM 
as long a possible. 

ORION 
cross D is open and 



it in PITCH then 
An d Orion, 
(garbled) 
- find out 



up over, 
an d see 
in YAW, 
this is 



our right side and 



if h ow 
o ve r . 
Rous ton 



look 
I'm 



It s moving. 

We ' d like to - 



what you RCS configuration is at this 



Okay, Jim, we have - 

System A and B are open, cross C is 
it. (garbled) are terminated. 
Roger, we'd like for you to use system A just 



Okay, system A is, system A 
system B is closed. 



X s now open , 



APOLLO 16 MISSION COMMENTARY hll^lll CST 12:09 GET 9 6:15 312/2 



CAPCOM And Orion, have you loaded the AGS aboard 
COM j us t y et ? 

ORION Negative. 

ORION That's negative, over. 

CAPCOM Okay, understand negative. 

ORION We don't have the AGS up yet, Jim. 

CAPCOM Roger, because when you do load those (garble) 

we want you to load nominal values. Data first. 

ORION Okay. 

ORION (Garbled and heavy background noise) controls 
nominal. Okay, we're going ahead with the (garbled) check, Jim. 

CAPCOM Okay, and if the PLSS S-band procedure doesn't 
work for us we're going to ask you to maneuver. Connect the AI 

attitude, where the YAW angle does not have to change (garbled). 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY M 20 111 CS T 12:15 GET 96:21 313/1 



Roger. I understand, 
(garble) Charlie. 
Okay Houston (garble) 

Okay Houston back on the (garble) how 



SC 
SO 
SC 
SC 

do you read? 

SC H ouston (garble) how do 

CAPCOM Orion this is Houston, 

to proceed now with this attitude maneuver. 
MBI angles (garble). 

SC Go ahead. 

CAPCOM Okay the MBI is ROLL 000, PITCH 053, 

YAW 000, the steerable angles PITCH plus 26, YAW minus 12 
ove r . 

Copy. 000, 053, 000, PITCH 26 YAW 



you read? 
We'd like 
I'll 



you 
give you 



SC 

minus 12. 
SC 

12, 51, (garble) 
SC 

CAPCOM 
S C 

CAP COM 
S C 

Orion we've got 
Command Module, 

CAPCOM 

S C 

SC 

CAPCOM 
here . Give 
SC 

CAPCOM 
S C 

10556 , 100045 



Ok ay , H ous t on 
51 and 10 0. 
(garble) , 

Roger. (garble) looks 
(garble) for you. Are 
(garble) NOUN 20's. 
Okay. With Lunar Module, 

29603 plus 28563, plus 35951. 

Casper plus 00004, — 
(garble), 
(garble) 556. 

Okay Jim, how do you read 



we're (garble) check. It 



good . 

you ready 



to copy' 



Orion . 
For the 



Well there's real 



n ow ? 

excessive noise down 



me th e 



Command Module numbers again. 
Okay how do you read now. (garble). 
I can just barely read you, Charlie. 
Okay (garble) Command Module. (garble) 
(garble) 02, 20, over. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kjl^lll CST 12:20 GET 96:26 314/1 



ORION (garble) 

CAPGOM Orion, this is Houston. We (garble) 

latitude. We'd like you to go to (garble) position, 



ORION 
(f;arble). 

ORION 
ORI ON 
CAPCOM 
ORION 
CAPCOM 
CASPER 
CAPCOM 
TCA for you (garble) 

CASPER 
checkout, over? 
CAPCOM 
CASPER 
CAPCOM 
CASPER 
CAPCOM 
CASPER 
CAP COM 
CASPER 
( garb le) . 5 . 
CAPCOM 
ORION 



Okay, we're in latitude and we go to 

( garble) 
(garble) over. 

Charlie, I just barely read you. 
(garble) primary transmitter receiving. 
Casper, Houston, do you read me? 
Loud and clear. 

We just barely hear you but I have a 

Roger, can we now do the DPS p ressurlzation 

Roger, we're ready for DPS press. 
Okay. We'll go ahead with the TCA now. 
(garble) Heavy background. 
( garble) 
( garb le) 

(garble) DPS p res s uri z a tion , 
(garble) 

(garble). DPS pressurized from 1.5 to 

I'll tell you one thing, Charlie, (garble), 
(garb le) 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kH^jll 12:25CST 96:31GET 315/1 



out . 



SC GARBLE. 

SC Heavy background noise. 46 

SC Roger. Landing radar check out, 

ORION There we go, go to landing. 

ORION Radar set for landing power signal light 

Okay, Jim, Houston on the steerable, I mean 
- Orion on the steerable, how do you read, over. 
Man, we read you much better. 
Okay, it worked that time Jim, we got a 
and the steerable is working on the track 



ORION 
listen at me 

CAP COM 

ORION 
4.2 signal strain 
mode auto. 

CAPCOM 
the RCS. 

ORION 

CAP COM 



Very good. I have some words for you on 



Okay, go ahead. 

Okay, let's go normal configuration on your 
RCS and then we want you to transfer 3 percent more out of 
system A as we see the pressure going up on A. 
ORION Okay, transferring - 

CAPCOM And the caution of course not more than 

1 80 on th e amps . 

ORION Okay, the landing radar H dot is only 

reading minus 17 right now. The 8,000 works okay. 



Orion will you give us high bit rate, please, 
Okay, that looks good. You've got high bit 

left. 

Roger. 

Jim, can we try a pitch maneuver back to 
viewing attitude so we'll see if this thing 



CAPCOM 

ORION 
rate biomed at 

CAPCOM 

ORION 
the landing site 
tracks ? 

CAPCOM 

CAPCOM 
uplinks in and then 

ORION 

CAPCOM 
send you an uplink. 

ORION 

CAPCOM 

ORION 
working properly. 

CAPCOM 

ORION Well, it's not 

altitude rate and it's not reading 
The altitude transmitter is 3 
velocity transmitter is 3.7. 

ORION And, Jim, 

card - go ahead. 



S t an d by one . 

Okay, just hold it one, we want to get our 
you can try that maneuver. 
Ok ay . 

Okay, Orion let's go POO and 

Okay , 
Roge r . 
Ok ay , 

Ok ay , 
Wei 1, 



data and we 11 
you've got POO and data. 
Houston the landing radar jets is not 



what's the problem, Jim. 



reading the right numbers 
the right numbers in VERB 



m 
63. 



CAPCOM 
normal voice 



I ra s o r ry 



2, the velocity transmitter - 
the AGS is loaded with the data 
Okay, we want you to select 



AFOLLO 16 MISSION COMMENTARY kjl^lll 12:25CST 96:31GET 315/2 

ORION AGS is loaded with the data card numbers, 

CAPCOM Roger, I copied Charlie. 

END OF TAPE 



APOLLO 16 MISSION COMMENTARY hll^lll CST 12:31 GET 96:37 316/1 



CAP COM 
showing bad data on 

ORION 

CAP COM 

ORION 
8000, but the BLOZY 

CAP COM 

ORION 

CAP COM 

ORION 

CAPCOM 
until after the uplink. 

ORION Okay 
b re ake r . 

ORION 
so we could see the 

CAPCOM 

CAPCOM 
paths whenever you 

ORION 

CAPCOM 
098, 47, all zeros 
01380 plus 00110, 



Orion this is Houston. Are you also 
the tape meter on the landing radar? 
That's affirmative. 
Roger . 

The 8 -- altitude is reading right at 
was only reading 15. I'll run it again. 
Rog er . 

Can I run it while B27 is in progress? 
Standby on that one. 
Yes, I'm sure I can. 

Hold off on that landing radar check 



We'll go off and pull the circuit 



'd like 
site. 



to start a PITCH back down 



Jl m , we' 
landing 

Standby. We're still getting the uplink, 



Orion, this is Houston. I have the abort 
are all ready. 
Okay standby. Okay, go ahead. 
Okay, at the beginning no PDI plus 12, 
, plus 01, 023, plus all zeros, minus 00500, 
01139, 035, all zeros, 273, 59270 plus 01026 



zeros, minus 00494, 09935, all zeros, 10122, 1500. 
profile 10 percent for 26 



seconds full throttle for 



plus all 

Th rottle protixe J.U percent 
remainder LM weight 36673, over. 

OI^ION Okay, Jim. That was a little bit too fast 

but I think I got it all. 098470000 plus 01023 plus all BALLS 
minus 00500, 01380 plus 00110, 01139, 035 all BALLS, 273, 

plus all BALLS minus 00494, 09935 all BALLS, 
that's throttle profile at 10 per cent for 
throttle LM weight 26673, go ahead. 



59, 270, 012, 760 
10122 , 1500, LM -- 
26 seconds at full 



y o ur 



CAPCOM 
j us t con f i rm 
finished with 

ORION 

CAPCOM 

ORION 

CAPCOM 
Charlie, I'm ready 

ORION 
01026 . 

CAPCOM 

ORION 

CAPCOM 

ORION 

CAPCOM 
340, plus 56997, 



Roger. It 



that NOUN 86 DELTA VX 



good readback. Let 
is plus 01026 and we 
and we need (garble) 
check again (garble) 



me 
I 



re 

VERB 74. 



computer. Okay 

(garble) radar 

You h ave i t. 

Okay, read that again, Jim. The DELTA VX, 

DELTA VX NOUN 86 is plus 01026. And 
on the PDI path. 

Okay, I was wrong on that. I got it now 



Okay are you ready PDI? 
Go ahead with the PDI path. 
Okay India 0 -- 
Re p e a t . 

09835, 0468, 11004 plus 00026, 



002, 114 



PDI EARLY JULIET 101, 221500, HELOW 103, 



APOLLO 16 MISSION COMMENTARY k { IQ 1 11 CST 12:31 GET 96: 37 316/2 
CAPCOM 21 all zeros, over. 

ORION Roger Jim. Could we start a PITCH attitude 

now and see the landing site? 

ORION Are you done with our E-MOD, Jim? 

CAPCOM We're finished with the E-MOD dump, but 

we'd just as soon get all these paths up and we're not con- 
cerned about the landing site down here. 

ORION Okay — 

ORION I didn't think you were. 

ORION Okay fine. I'm down through kilo and 

I'll read back starting with India. 098350468, 1104 plus 
00026, 002114, 340 plus 56997, 10122, 1500, 103210000, over. 

CAPCOM Okay that's a good readback and I have 

T2 and T3 for you. 

END OF TAPE 



APOLLO 16 MISSION COMMENTARY h 1 10 / 12 CST 12:38 GET 96:44 317/1 



at 



098 
the 



105 19 
over. 



ORION 
CAP COM 
TDI plus 24 plus 
CAP COM 
ORION 
CAPCOM 
ORION 
59 29 03 
next one 
CAPCOM 
checkout, John, 
24 plus 25 and 
ORION 
CAPCOM 
ORION 
CAP COM 
ORION 
all right in H dot, 
next 2 registers. 
CAPCOM 
ORION 
reading 48 opening, 
I did it, it read 8 



Go ahead. 

Okay. 12 Lima 098 59 2903 105 
25, and T3 Victor 100 42 42 86, 
Orion, will you verify auto on 
It is in auto. 
Ro g e r . 

Okay, in reading back starting 
45 00, November 100 42 4286, go 



19 45 00, T2 
ove r . 

the s tee rab 1 e 



with Lima , 
ahead with 



Okay, we're standing by for the landing radar 
and of course Charlie, he got that T2 at TDI at 
I have an AGS K factor for you. 

Okay, go ahead with the AGS. 
Okay. 00090, all zero's, 00111, over. 
Okay, copy. 9 - 900000111. 
Good read back. 

Okay, there's the data. It's reading 
but it's changing data in the, in the 

Roger, we're looking at it down here. 
And the tape meters, and the tape meters now 
and the altitude meter would, the first time 
thousand, and now it's reading Zero. 
Okay Orion, let's go LOW BIT rate, and we're 



let's go LOW BIT 
I don't think 



Roger. Jim, I don't think it's 
Orion, we'll get back to you on 



Roger. 
And Orion - 
You can see the 
Houston, just a 



data, 
reminde r 



CAPCOM 
losing the steerable 
ORION 

YAW. 

CAPCOM 
radar . 

ORION 

CAPCOM 

ORION 

CAPCOM 
406 to plus Zero. 

ORION 

CAP COM 

ORION 

CAPCOM 

ORION 
test if that's okay 

CAPCOM 

ORION 
locked on right now 

CAPCOM 
if your ready to copy. 

ORION Stand by. Go ahead. 

CAPCOM Okay, ignition at 097 

00681 minus all Zero's minus 00580, over. 

ORION Right, copy. 097401716 

ball's minus 00580. 



tracking in 
the landing 



on the load 405 and 



BIT rate 



Rog. 

And we're ready for HIGH 
Okay, do you have it? 
Roger. 

Okay, I'm going to terminate 
with you all. 
Ro ge r , 

negative, Houston wants them to stay 



the landing radar 



That' s 



Orion, this is Houston, 



I have a circuit PAD 

40 1716 NOUN 81 plus 
plus 00681 minus all 



APOLLO 16 MISSION COMMENTARY hJlQlll CST 12:38 GET 96:A4 317/2 



CAPCOM Good read back. 

ORION Okay, we'll go ahead and go, do the IMU 
(garble) right now if that's okay with you, Houston. 

CAPCOM Roger, we're standing by, John. 

CAPCOM Okay, Charlie, will you. in 404 will you put 
min us 12 345 . 

ORION Roger. 

ORION Okay, Houston, when we do this attitude maneuver 
for this P52, we're going to lose HIGH GAIN. 

CAPCOM Stand by. 

ORION Is that all right? 

CAPCOM I think we're all prepared for it. 

ORION Okay. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hjl^jll CS T 12:46 GET 96:52 318/1 



CAP COM 
John , and we want 

CASPER 

CASPER 
( garble) . 

CAP COM 

ORION 

END OF TAPE 



Okay, you can go ahead and maneuver, 
you to use the RCS system A. 
Okay. We're using system A. 
Okay, Houston, we have you on the 

Orion, this is Houston, go low bit rate. 
We have it. 



APOLLO 16 MISSION COMMENTARY kJlQ/ll CST 12:52 GET 96:58 319/1 



ORION (garble) 01 to (garble). 

CAPCOM Orion, we cannot read you. Will you 

g;o down to us and back up. 

CAPCOM Orion, (garble). 

ORION (garble) copy. 

CAPCOM Okay, perhaps we can read the torquing 

£ingles If you want to give them again. 

ORION The angle difference is minus 905. 

CAPCOM Okay, we copied your 905 but we did not 

get the torquing angles, I hope you all have written it 
d own . 

CAPCOM Orion, this is Houston. We'd like to 

get high bid rate again and some good voice. We'd like you 
to go back to that attitude which we gave you of pressure 
20553 and set in the steerable angles pitch plus 26 of yaw 
ir in us 12. 

ORION Okay, we're in route. 

CAPCOM Just delay the landing radar test until 

we get some good data. 

ORION Okay. 

ORION I guess on that land radar, with the 

circuit breaker in, Charlie is working off the ground -- 
maybe no t . 

CAPCOM Go forward OMNI Orion. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hll^lll 12:57CST 97:03GET 320/1 



th e 



Okay, Ron 
s te e rab le . 

Okay , Jim, 
Over , 

I read you 



let s go back to low bit rate 
we have you now on the steerable 



loud and clear, 



Okay, the P52 went 
060 plus .139 minus 



s uper- 
. 018. 



You sound 

Our torquing 
We torqued at 



an d 



copied. 
,018 at 



On torquing 
96:58:40 . 



Roger , 
minus 0 

Th a t ' s ro g . 

And you go normal voice. 
And the AGS checkout has 
Okay. 

The only thing we haven't 



angles minus 



gone well, 



done is 



ORION 
until we get 

ORION 
how do you read, 

CAP COM 
b eauti f ul . 

ORION 
angles were minus 
96: 58:40 over. 

CAPCOM 
060 plus ,139 
ORION 
CAPCOM 
ORION 
CAPCOM 
ORION 

radar checkout and we'll get to that soon as Ken gets 
with his burn. 

CAPCOM 
radar check out on 
the one I want to 
ORION 
ORION 
left like it's 

CAPCOM 
values we want 
stuff. 

ORION 
the H dot . 

CAPCOM Roger, we copy. 

ORION Okay, minus 495 plus 1860 plus 1331 

on and the tape reader is up in left and it reads 8,480 
think it was locked on the ground or something when we 



ren de z vous 
th rough 



Roger, we're recommending that rendezvous 
the backside and landing radar checkout is 
go through now. 
All right, fine. 



Okay , we ' re 
s uppos ed to be. 

Okay, John, when you get 
to read us the tape meter 



going now. Okay it's up in 



you 



to the 
values 



NOUN 
of H 



66 - 67 
and H 



Okay, it's right on, Houston. It's 8,040 off 



right 
I 

came 



over that low pass due to our communications angle, 
wrong, but that's - it was sure acting funny, 

looking good to us 



I may b e 



CAPCOM 
ORION 
and 345 on the 
CAPCOM 
ORION 

it's p ret ty hard to 
of orange juice and 
o range j ui ce . 

CAPCOM 

ORION 

ORION 

CAPCOM 



Okay, its looning good to us now. 
Okay, we've got 3 zero nouns, 2 transmitter 
velocity transmitter, make that 355. 
Okay, we copy. 

Hey, Jim on those drink bags I tell you 
see things when you've got a helmet full 
zero gravity is something with that 

Well, you've got to drink fast. 
You really do. 

When do we get the 210 (GARBLE) . 
Okay, acquisition on your next (GARBLE). 



APOLLO 16 MISSION COMMENTARY 4/20/72 12:57CST 97:03GET 320/2 

ORION Hey, Jim we had to turn on our window heaters 

for about 10 minutes per side to clear up the windows right 
before undocking. 

CAPCOM Roger, we copy. 

ORION We've been using the - we've been using 

the LOG pump to keep cool in here and it's really neat. 
CAPCOM We copy. 

ORION We've been needing something to keep cool 

I'll tell you. 

CAPCOM We understand completely. 

END OF TAPE 



APOLLO 16 MISSION COMMENTARY l,j2Q,fl2 CST 1:03P GET 9 7 :09 321/1 



ORION Jim, your uplink voice is just beautiful 

in every antenna we got. Over. 

CAPCOM Okay, that's a good data point. 

Unfortunately, the downlink is very very noisy. 

ORION Okay, I wonder what happened. On the 

check - the comm checks we did at 55 hours, of course it 
was closer, but it was real good then, I thought. 

CAPCOM Okay, we unde rstand. It s iust a com- 

pletely different situation, Charlie. 

ORION Okay. 

CAPCOM But your voice is just crystal clear 

right now. 

ORION Roger. 

CAPCOM Orion, this is Houston, with some 

trajectory information for you. 
ORION Go ahead. 

CAPCOM Roger. It looks like you'll be coming 

in about 10 000 feet high at PDI, John, which will be about 
3 to 4 seconds of hover time, and you'll be 17 000 feet - 

ORION Understand. Okay, does that mean that 

we're going to be - at pitch over, we'll be steering from 
south to north? 

CAPCOM That's affirmative. 

ORION Okay, so at pitchover we'll be - you'll 

be targeting us right into the target, but we'll be steering 
from south to north. Is that based on Ken's tracking? 

CAPCOM No, that's not - negative on that one. 

But you'll probably be coming straight in by the time you 
get down to pitchover. 

ORION Okay, thank you. How did our landmark 

tracking turn out? 

CAPCOM Stand by. Okay, the landmark tracking 

looked very good, John. 

ORION Oks.y. 

CAPCOM Orion, will you give us your ED bat 

readout, please. 

ORION The same as always, 37 volts. 

CAPCOM Very good. 

ORION Jim, is guidance going to have any 

gyro drift force? 

CAPCOM Stand by. Okay, no update on that. 

And it looks like your attitude for PDI is very close to 
the one that we'd like for the steerables so we'll try that 
when you come around at AOS. 

ORION Okay, and Jim, on this P52. That 

radar has drifted up into the field of view, but it's no 
sweat just moving it down and smooth. 

CAPCOM Okay, we copy. 



APOLLO 16 MISSION COMMENTARY hll^lll CST 1 : 0 3P GET 97:09 321/2 



ORION And one other thing that - when we put 

those state vectors in there, I guess we didn't have any 
LM vector in chere, and my computer activity light stayed 

I finally figured out what it was. I did 
rid of it. 

Okay, we concur. 
I think that's what it was. 
Everybody's nodding their head down 



s y s te m 



on all the time, 
a verb 66 and got 

CAP COM 

ORION 

CAPCOM 
here. Affirmative. 

ORION 
problem with 

CAP COM 
reg problem. 

ORION 
fuel - j us t 

CAP COM 
figuration for PDI 

ORION 
like somebody to 
during the lunar 

CAPCOM 

J ohn . 

CAPCOM 
RCS p res s ure 



Ho us ton , 16 
A. Is it a 
Yes , that' s 



- what appears to be 
reg problem or what? 
affirmative, Charlie, 



the 



system 



Okay, will we have a - if we use up 
A for descent, is what you want us to do 

Stand by. We'll give you an RCS con- 
when you all come around the corner. 



Okay, well, we'll be back. 



And 



I • d 

w e have 



the 
now 



think about this high APS pressure 
s t ay . Ove r . 

Okay, we're looking at that one too. 

Okay, we are noticing an increase in 
there, but we have enough ullage volume 



to get all the propellant out. 



ORION 


Unders tand- 


Th ank 


you. 






CAP COM 


Orion , 


this 


is Houston. 


Have 


you - 


ORION 


Yes, if 


we're - 








CAPCOM 

1 


E ve r no 


t i ce d 


any change 


in your YAW 


ORION 


Jim, it 


' s s tuck on 


minus 


12. 




CAPCOM 


Okay, and go 


ahead 


John. 






ORION 


I think 


that 


if we' 


' re on 


OPS 


mike 



talking to each other, 1 want to apologize 

It's probably pretty interesting, 
comm was as bad as you said it was. 



Probably 

It was good enough for us to understand 



wh en we re 
r i gh t n ow . 
not if the 

CAPCOM 
you, 

ORION We were afraid of that. 

CAPCOM Okay, Orion. If you see that reg 

pressure creeping up, you can do a small 
would help the situation. 

ORION Understand, we'll do 

a verb 49 for the AGS cal attitude, Jim. 



manuever, which 
that. We'll do 



CAPCOM Okay 
about 2 minutes to LOS. 



And Orion, we're coming up on 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h/lQIll CST 1:15 GET 97:21 322/1 



ORION Roger, 2 minutes to LOS. See you around 

for PDI. 

CAPCOM Orion, this is Houston. For your in- 

formation, the first disc pressure is 215 to 220 — the RCS. 
ORION Roger, understand. 

ORION Jim, is it both system GC climbing? 

CAPCOM Just system A. 

ORION Just system A, right. 

ORION Hey, Jim, I saw the landing site as we 

passed over. We're not going to have any trouble recognizing 
it from the rays. The rays stand out beautifully. 

CAPCOM Very good. Glad to hear it. 

PAO This is Apollo Control and both spacecraft 

have passed behind the moon during the end of the 12th lunar 
orbit. During this past, rather interesting front side pass, 
several nagging problems have cropped up or have been carried 
over from the preceding revolution. One concern is the landing 
radar which in its selftest mode gave some spurious readouts, 
the readouts never agreeing with what the test should be. 
Later on in a repetition of the landing radar selftest, 
the numbers on the onboard display came out as they should. 
John Young speculated that perhaps because of the low al- 
titude at the time of the first attterapt at the landing 
radar selftest, they were getting some ground reflections 
from the lunar surface which caused the selftest to be invalid. 
The selftest of the rendezvous radar has been postponed until 
the upcoming backside pass prior to acquisition on REF 13. 
The steerable antenna situation is still coming in and out 
as the steerable antenna appears to be locked in a stowed 
position. However, with the spacecraft attitude, oriented 
such that the antenna faces the earth, we've had fairly good 
communications during the better part of this front side pass. 
The 210 foot dish at Goldstone will acquire the spacecraft 
at the start of REF 13, and even if the steerable antenna 
is completely inoperative, all high bid rate data communications, 
voice, everything normally carried by the steerable antenna 
through the 85-foot dishes will be available on the ground. 
The lunar module reduction control system regulator situation, 
the crew is still running through some procedures to manage 
the two systems A and B of the reaction control system 
aboard the lunar module to balance the regulator pressures 
for the propellants. System A appears to creep upward 
slightly, periodically, and by opening the cross-feed valve, 
venting some of the propellant into the ascent tanks, it 
appears that the situation will stabilize. The descent 
propulsion system throttle check and the descent propulsion 
system p res s ur i z a tion routines were carried out completely 
normally earlier in revolution 12. Ken Mattingly, meanwhile, 



APOLLO 16 MISSION COMMENTARY hJlO/ll CST 1:15 GET 97:21 322/2 



PAO was given a go to circularize with the 

command module, Casper. Ignition time for this burn is 97 hours, 
40 minutes 17 seconds. It will be a service propulsion system 
burn, 99.5 feet per second. We'll circularize at about 51.8 by 
{)8.2. This is slightly eliptical but because of the 
ve r t i b ra ti on s of lunar orbit, the orbit of the command module 
fshould be almost circular at the time of rendezvous. Acquisition 
A3 minutes, 23 seconds from now, as both spacecraft coming 
around the front side. None of the problems mentioned 
with the RCA reaction control system regulators or the 
steerable antenna preclude the lunar landing. Even if the 
S-band — steerable S-band antenna is completely Inoperative, 
we're still go for landing using the OMNI antennas through 
:he Goldstone 2 10 foot dish. 42 minutes 36 seconds away from 
acquisition on the PDI or landing orbit at 9728 ground 
<?.lapsed time, this is Apollo Control. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h/2Q/12 CST 1:59 GET 98:05 323/1 



PAO This is Apollo Control at 98 hours 5 minutes 

ground elapsed time into the mission of Apollo 16. 3 minutes 
and 50 seconds to acquisition of signal; that is, the two 
spacecraft to come around the moon on the 13th lunar revo- 
lution. Some 29 minutes 24 seconds until ignition for the 
landing phase. Ignition time for PDI or power descent initiate 
is 98 35 04. The descent engine will burn for approximately 
12 minutes 53 seconds. According to the nominal plan, for 
a total velocity change from orbital velocity all the way 
down to zero or landing at the lunar surface of 6698 feet 
per second. The lunar module Orion will slim down at a rate 
that would make a calorie counter envious for at the start of 
PDI, the Orion will weigh some 18 tons. By landing, she'll only 
weigh 9 tons. All of this weight loss, of course, is propel- 
lant. During the descent, the lunar module pilot will be 
calling out numbers that the computer display has displayed 
for him. He will call them out to the commander and both 
men will be in what is call a vox motor voice actuated com- 
munications so that those on the ground can hear their con- 
versation. The lunar module pilot will call out these numbers 
for the angle at which the commander can see the landing site 
on a grid on his window called the landing point designator. 
During the final descent phase of the touchdown, the lunar 
module pilot will be calling out the landing radar readouts 
of H and H dot, that is altitude and descent rate re- 
spectively. The so-called low level of propellant quantities 
will be called out when the propellant quantities reach 5.8 
percent. At that time, the burn time remaining will be approxi- 
mately 111 seconds -- 91 seconds into this margin. There's a 
point called BINGO. This is the point where the commander has 
to make the decision to go ahead and land or to begin vertical 
motion and then abort stage in case it's a no/go situation 
on the landing. He has approximately 20 seconds to make this 
decision to land. The CAPCOM, in this case, Jim Irwin, or 
the Orion, will be make this call of level and BINGO to the 
crew at the appropriate times. Some 19 seconds away from pre- 
dicted acquistion as Orion and Casper come around the moon and 
Casper meanwhile will have circularized. 25 minutes 47 seconds 
from ignition. We should have acquisition now. We're standing 
by for that. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k/lQ/ll CST 2:03PM GET 98:09 324/1 



PAO 
an ten n a on 



It remains to be seen whether the steerable 
the Orion is functioning properly as we come around 



on revolution 13. In any case, whether it works or not, we're 
still GO for landing at this point. Displays here in Mission 
Control have switched from the lunar orbit back ground projection 

plotters of altitude, velocity and so on. 
are driven by radar, for the descent and 
have AOS in lunar module Orion. Let's switch 



plotters to the XY 
Colored lines that 
landing phase. We 
on to air-ground, 

CAP COM 
with the OMNI 

CAP COM 

CAP COM 

CAPCOM 

ORION 

ORION 

CAP COM 
w eak . How do 

ORION 



Houston, I'm reading you. 
an t enn a . 

Orion, this is Houston. How 
Orion, this is Houston. How 
Orion, this is Houston. How 
Hey, Ken. Go off (garble). 
Houston, Orion, over. 
Orion, this is Houston. We 
you read us ? 



We want you to stay 



do 
do 
do 



you 
you 
you 



re ad ? 
read ? 
read? 



read you rather 



can not 



Roger, you 5-5, and command module 
(garble), and we're standing by for ya'lls decision with them, 
over . 

Roger, understand you standing by. We want 
and we'll be requesting HIGH BIT rate 



CAP COM 




you to stay 


with 


short ly . 




ORION 




CAPCOM 




ORION 




CAP COM 




ORION 




CAPCOM 




We'll set yo 


u up 


ORION 




ORION 




about a 600 


feet 


CAPCOM 




ORION 




CAPCOM 




fairly good. 




ORION 




CAP COM 




ORION 




PAO 




possibility 


of a 



the OMNI 



Ro g e r . 

And we're ready for HIGH BIT rate now 
Copy no CIRC. 
We copy, no CIRC. 
Okay, you have HIGH BIT rate. 
Okay, anticipate a wave off, 
for the next one. 
Okay . 

Hey, Ken's right out in front 
so we have a visual on him. 
Ok ay , we copy . 

What attitude do you want us to 
Stay right where you are, John. 



for this one 



of us , maybe 



goto 
It ' s 



for BIT, 
s o un d s 



Okay . 

Orion, we have confirmed forward OMNI. 
Rog, that what you have, forward OMNI. 
Lunar module Orion has been advised of 
wave off for landing on this revolution. 
i:hat the ci rc ul ari z ati on burn on the command module Casper 
uns uccess f ul . 



th e 

It see ms 
was 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/20/72 CST 2:10 GET 98:16 325/1 



CAP COM 
to go back to norma 
ORION 
ORION 

Reg. A lights on th 
going out . 

CAP COM 

ORION 

CAP COM 
and clear. 

ORION 

re meeting problem h 
as I look at him on 
about, oh, I'd say 

CAP COM 
had the problem? 

ORION 

CAP COM 



Orion this is Houston. We'd like you 
1 RCS configuration. 
Ro g e r . 

Jim, be advised we had a couple of RCS 
e back side and my (garble) system is 

Roger. We copy, Charlie. 

Houston, how do you read over? 

Orion, this is Houston. Read you loud 

I don't think we're going to have a 
ere, but we're pointed right at him and 

my LPD . . . Ken is out at 46 degrees and 
800 or 900 feet, maybe a 1000. 

Roger. Can you see those booms that 

Everything is retracted in the SIM bay. 
Ok ay , we copy . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k JlO 111 CST 2:15 GET 98:21 326/1 



PAO This is Apollo Control. We are going around 

ac least one more REV before attempting the power descent initiation 
for lunar module Orion. Ken Mattingly in command module Casper 
Incountered seme problems in preparing for the service propulsion 
system burn for the ci rcularza tion maneuver. Seems that a secondary 
circuit on the thrust vector control system apparently did not 
come up to specifications. So the circulariz ation burn was aborted, 
and we have a wave-off. We'll stand by for the remainder of this 
front side pass as a new circulariz ation burn maneuver is calculated, 
and troubleshooting continued for Ken Mattingly and his problem 
aboard Casper. 

Okay, go ahead 16. 

Alright, Jim. You guys working on some more 



forth 



take 



Oh yea, we are, 
your AGS now if you have 
Yea, Sure do. Stand by 
We'd like to PITCH down 



Charlie, and when 
those. 



you get 



CAP COM 
ORION 
pfLds and so 
CAP COM 
ch an ce , we'll 
ORION 
ORION 
is that possible. 

CAPCOM Okay, you are clear. 

ORION Okay, starting with 5A0 minus 008 plus 

plus 002 plus 006 plus 05 - correction plus 045 minus 088, 
the initial numbers were the same as on the data card flow. 

CAPCOM Okay, begining, it was a read back, begining 

at 540 minus 008 plus 001 plus 002 plus 006 plus 045 minus 088, 
and the inltal values were the same as on the card, over. 

ORION That's affirmative. 

CAPCOM Okay, and on your RCS situation we suspect 

that the first DISK went back side. We would like to 
make sure that the system A pressure, when the sourse pressure 
in system A gets down to 500 PSI, we'd like you to close off 
s ystem A , over. 

ORION Roger. 



to keep Ken in sight, 



001 
an d 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY M20/12 CST 2:23 GET 98:29 327/1 



ORION When you say abort pressure, you mean 
h e 11 urn? 

CAPCOM Afflrmativa. 

ORION Okay, Jim, the helium is holding right 
up there. It's 2400 and that's where it was before we 
started getting off RCS flight. The pressure never has gone 

above about the 205, 210 maybe. 

CAPCOM Okay, we copy. 

ORION All right, Jim, give us a call when 

you want us to go to S-OMNI. 

CAPCOM Roger, we sure will, Chuck. 

ORION And have you got an LOS down for us? 

CAPCOM Ken, is your PAN monitor on? 

ORION Okay. 

ORION Okay, we'll try our radar lockup here 
too again. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k 1 1^ 1 11 CST 2:28 GET 9 8:34 328/1 



CAPCOM Okay Orion let's go a LOW bit rate. 

PAO This is Apollo Control here at Mission 

Control. All of the -- 

PAO This is Apollo Control here in Mission 

Control. All of the options are being considered with the 
current situation in which the thrust vector control portion 
of the stablization and control system, which in turn controls 
the firing and gimbaling of the service propulsion system 
engine. It's being mulled over. The other options would 
be rendezvous over the next couple revolutions and possibly 
using the descent propulsion system onboard Orion for in- 
jecting the spacecraft back into a transearth projectory. 
Over the next several hours this consideration should sort 
itself out. 

CAPCOM (garble) again? 

CAPCOM Orion go aft OMNI. 

ORION (garble) Jim, 

CAPCOM Roger. 

CAPCOM Orion go LOW bit rate. 

ORION We have LOW bit rate. 

PAO This is Apollo Control at 98; 37. The current 

situation in Apollo 16 is a waveoff. That is another revolu- 
tion before attempting a landing. 

CAPCOM (garble) Ken's trying to call you. 

PAO However as mentioned earlier other 

options are being looked at in case the trouble shooting on 
the Command Module — Command Service Module stablization 
and control system fails to pan out to where the circularization 
burn or any other service propulsion system burns could be 
conducted successfully. 

CAPCOM (garble) OMNI. 

CAPCOM Orion forward OMNI. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h /20 /Tl 2:33CST 98: 30GET 329 /1 



ORION Hey, that sounds pretty good. Houston, 

how do you read Orion, over. 

CAPCOM Read you loud and clear, Orion. 

ORION Houston, this is Apollo 16 GARBLE. Heavy 

background noise, (Garble) — PDI . We'd like to try. 

CAPCOM Orion this is Houston the propellant. 

ORION Roger. We wonder if there is any possibility 

of an answer on - we're going to do a P52 and get ready for 
another PDI over. 

CAPCOM Standby, we'll tell you. 

CAPCOM Okay, Orion this is Houston you can go ahead 

with your P5 2 ,John, we're thinking of having ya'll try to get 
back closer together on the backside if GARBLE approach we 
know some more ways we have and if later we decide on that PDI, 
we'll have some more procedures for you. 

ORION Understand. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kflOfll CST 2:38 GET 98:45 330/1 



ORION Understand. 

PAO This is Apollo Control, There's a rather 

busy huddle around the flight director's console here at 
Mission Control as all the options for the current situation 
in the mission are considered. Shall we continue to trouble- 
shoot the problem with the command service module stabilization 
control system or shall we preoceed with rerendezvous and 
ci transearth injection burn at several hours hence. The 
possibility is still open for troubleshooting the problem 
with the system that controls the service propulsion system, 
iind just landing at a later time. We are hopeful that before 
loss of signal on this 12th revolution of Apollo 16 that the 
decision will be made. At 9846, this is Apollo Control. 

PAO This is Apollo Control. Spacecraft 

communicator Jim Irwin in the next few moments should pass 
up to the crew of Orion what the current thinking is here 
in the Control Room on attacking the problems that have 
cirisen in the Apollo 16 mission. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kJlQ/ll 2:49CST 98:56GET 331/1 



PAO This is Apollo Control. Aboard the Command 

Module, Ken Mattingly is troubleshooting the SCS reading out 
what his onboard indications are. Let's listen to that for 
awhile, and switch our way from Orion. 

CASPER I have no NTBC. I'm going clockwise on the 

translation head controller, mark it. I still have no NTBC. 
I'm bringing on the pitch 2 gimbal, mark. I'm checking the 
front wheel down to 0, up to 1, back to 1/2. The yaw front 
wheel is going over to 1 -- and I don't -- let me try it again. 
There it goes. I didn't have the motor on, I'm turning it off. 
I'll turn it on one more time. And stable. I'm taking the 
tram which is now set at a little one on the front wheel down 
towards 0. I move it slowly, it get's a little dynamics, and 
then it stops. I'm going to take it down to 0 at about this 
rate, it oscillates, and now it's diverging, and I'm turning 
the gimbel motor off. I'm going to hold in this configuration. 

CAP COM Roger, copy. 

CAPCOM Ken, what we would like for you to do now, 

is crank up the yaw 2 gimbal again to that stable condition, 
and then let's see what MTVC does to it -- see if that will 
excite the oscillation. 

CASPER It did last time. I now have the gimbal 

on again and I'm going to give it a little yaw and there it 
goes — coming off mark. 

CAPCOM Roger, copy. 

CASPER Would you like to take a look at in accel 

comman d? 

CAPCOM Standby. 

CASPER Understand, standby. 

CAPCOM Roger, Ken, go ahead and let's try in accel 

comman d . 

CASPER Okay, and it's diverging all on it's on in 

accel command. I didn't put any inputs into it. 
CAPCOM Roger, copy. 

PAO This is Apollo Control 99 hours and 1 minute 

ground elapsed time. Flight Director Jerry Griffin is instruct- 
ing the two spacecraft communicators to brief the crew on the 
current situation. And which apparently we have as long as 
5 lunar orbits to make a determination on the feasibility of 
continuing with the landing, or whether we'll have to rendez- 
vous with the two spacecraft back together, and do an immediate 
return to Earth. Assuming that the service propulsion system 
would be inoperative. We're some 14 minutes away from loss of 
signal with the Command Module. We will monitor the discussion 
between the spacecraft communicator, and the crew Orion, and 
Mattingly in Casper. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kjl^lll CSX 2:56P GET 99:02 332/1 



CAPCOM Hello, Orion and Casper, this is Houston. 

Roger. It looks like we're not going to have a decision on 
this REV and we do have a capability of spending about 5 REV' s 
in this configuration before we have to make that decision. 
We would like you all to move into a station keeping position 
and you should be at the closest point of approach at about 
100 hours, and we're recommending a CSM active to move into 
a position and to station keep and we're going to run some 
simulations down here on this TVC problem and get back to 
you. 

CAPCOM Casper, this is Houston. You copied 

too, didn't you? 

CASPER Roger. I'm waiting. I still have some 

of the gimbal motors on and the bus ties so stand by on that. 

CAPCOM Okay, Ken. We'd like to try one more 

thing. There's a remote possibility that the RHC may be 
induced in some noise or transits into the system. We'd 
like you to kill all power to the RHC, turn off both AC and 
DC and repeat the gimbal check at ac accell command and 
see if the gimbal takes off. 

SC Okay, I secured the hand controller by 

just taking normal 2 power to OFF and the rest of the powers 
were OFF, I'm in accel command on YAW and I'm going number 2 
up to start and it's in accel and it's stable. Would you 
like for me to try the thumb wheels. 

CAPCOM Stand by one. 

SC And with a little excitation from the 

thumb wheel it took off again. 

CAPCOM Roger, understand. 

CAPCOM Ken, for that rendezvous we're suggesting 

you use the procedure you worked on there in the similator 
just move it in and when you're at closest approach. 

SC Okay, Hank, we'll do that. Thank you. 

CAPCOM Let me see if there's anything else they 

want to do with this gimbal thing before we shut it down. 
St and by one . 

CAPCOM Casper, Houston, we'd like you to try for 

our data, one more YAW primary, YAW secondary G&N servo 
loop check, gimbal check. 



END OF TAPE 



APOLLO 16 MISSION COMMENARY 4/20/72 GST 3:02 GET 99:08 333/1 



ORION Henry, did you say primary and secondary 

on this G&N drive? 

CAPCOM Negative. Just a second there, 

1 didn't mean to say primary, 

ORION Okay. Can I turn the other three gimbal 

mot or s off? 

CAPCOM Say that again. You were blocked out. 

ORION I'd like to turn the other three gimbal 

motors off if we don't need them. 

CAPCOM Roger. Go ahead and turn those off. 

ORION Okay. I'm now at S and CMC control, 

I'm sitting up 204 and I have program 409 loaded. 

ORION I'm starting gimbal number 2 yaw. Okay, 

it's stable now. I'm going to do a proceed on 204. 

CAPCOM Roger. 

ORION Well, it doesn't look like I got anything 

on time, 

CAPCOM I think (garble) on G&N C control has 

it . 

ORION Okay, let's try it again. Go back over 

e ve ry thin g . 

ORION Okay, I'm coming up. I'm going to 

start it again and I'm going to try it. Now, as soon as I 
turn it — well. My golly, it's dammed itself there. 
It started out wild and it's settled down. Now (garble) 
I'm going to proceed on 204. 

CAPCOM Roger. 

ORION Plus 2 and it's oscillating minus 2 

and it's oscillating about 1 degree each and it's oscil- 
lating in the center. It is not divergent however, now it's 
gone to trim and it's oscillating about plus or minus almost 

2 degrees or plus or minus 1 degree. I'm going to turn it 
off, mark . 

CAPCOM Roger, copy. 

PAO This is Apollo control at 99 hours 

11 minutes into the mission of Apollo 16. To recap the 
current situation, the crews of both vehicles Casper and 
Orion have been instructed to station keep as they come 
to their closest approach during the next pass behind the 
moon, with the command service module being active in the 
rendezvous. We have some five hours to resolve the current 
problem which consists of difficulty by Ken Mattingly in 
getting the thrust vector control system which keeps 
the service propulsion engine alined through the center 
of gravity on the command service module. At the same time 
people on the ground, here in mmission control and over in the 
training building are running simulations to attempt to 



APOLLO 16 MISSION COMMENTARY hl20ll2 CST 3:02 GET 99:08 333/2 



PAG develop a bypass or a workaround for the 

situation that Ken Mattingly has encountered and as prepara- 
tions for the ci rc uluri z a tl on burn. Some 3 minutes away from 
loss of signal. 

CAPCOM I bet if I was at the average g killed 

your E MP . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k 1 2^ 1 11 CST 3:07 GET 99:13 334 /1 



CASPER Okay, thank you. 

PAO This is Apollo Control. One slight correction 

We have 5 revolutions which amounts to 10 hours in which to 
make the decision before the geometry of the two spacecraft 
orbits would dictate no landing, would be out of plane 
with the landing site beyond the capability of the descent 
propulsion system to steer into the landing site. To repeat 
again, that is 5 revolutions Instead of 5 hours. 

CAPCOM Casper, Houston, we are about 2 minutes 

from LOS and when you come around next time in that rendezvous 
just come up on the best OMNI, then we'll get high gain from 
th e re . 

CASPER Okay, Hank, and is there anything else that 

you can think of we can do? We might try and take a look at 
otherwise we'll just be station keeping a hundred feet or — 

CAPCOM We can't think of anything else down here 

Ken . 

CASPER Okay, thank you sir. See you in a few 

min ute s . 

CAPCOM Ken, for your info we uplinked a new 

vector to the LM and we weren't able to get yours in so there 
will be a small difference, a couple feet per second. 

PAO This is Apollo Control. We've had loss 
of signal near the end of the 13th lunar revolution as both 
spacecraft go around the back of the Moon. Flight Director 
Gerry Griffin is having what he calls a tag up with all of the 
console positions here in the control center for a discussion 
of the current situation in Apollo 16. We've had a wave off 
so far. That is the current posture of the mission. Crew will 
rendezvous at the next closest approach time and station keep 
until such time as the resolution is made here on the ground 
whether or not to continue the mission or to re - ren de z vo us , 
dock and do an immediate transearth injection burn. They're 
attempting to work around the problem and the command service 
module thrust vector control circuitry, which apparently bombed 
out on Ken Mattingly when he was preparing for his ci r c ular i z a t i on 
burn. We have some 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/20/72 GST 3:12 GET 99:18 335/1 

jPAO We have some five revolutions in which 

the decision can be made before it would be a definite no go 
for landing. At 99:18 and 46 minutes away from acquisition 
on REV 14 this is Apollo Control. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kilO/ll CST 3:25 GET 99:31 336/1 



PAO this is Apollo Control, 99 hours 31 minutes 

ground elapsed time into the mission of Apollo 16. To recap 
the current situation here in Mission Control Center, various 
considerations are underway on whether or not to continue the 
mission with a later landing or to have the 2 spacecrafts, 
Orion and Casper, rendezvous, dock and do a transearth injec- 
tion burn using the lunar modules' dessent propulsion system, 
this would assume of course that the service propulsion system 
on the command module is inoperative, because of the apparent 
problem in the S CS or stabilization control system, which in 
turn drives and controls the SPS system, aboard the command 
service module. We have something in the neighborhood of 5 
revolutions or about 10 hours in which to reach the decision 
on the outcome of the lunar landing. As Orion came around the 
East limb of the Moon this last revolution in preparation for 
power dessent initiation, they were prepared for the landing 
however Casper, piloted by Ken Mattingly, reported that he 
had not made the ci rcularl z a tion burn. Since that time there 
have been many huddles here in the control room engineers are 
going over drawings in the back rooms simulations are under- 
way here at the Manned Spacecraft Center to determine the 
nature of the service propulsion system control problem and 
hopefully by the time the crew comes around the corner again 
some 31 minutes from now at least some clarity will come out 
of the situation. But as mentioned earlier it may take the 
entire 5 revolutions. The limit of 5 revolutions has to do 
with the orbital geometry because after that time the orbital 
plain of the lunar module would be — would have drifted so 
far away from the landing site that the — there's not ampel 
propellent to steer into the Descartes landing area from the 
present orbit without a plain change. At 99:34 and 30 minutes 
and 30 seconds from acquisition of signal both spacecrafts this 
is Apollo control. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY liJlQ/ll CST 15:50 GET 99:56 3 37/1 



P AO This is Apollo control 99 hours 56 minutes 

ground elapsed time into the mission of Apollo 16. Some 
7 minutes 40 seconds away from acquisition on the I4th lunar 
revolution. To recap again the current situation in the mis- 
sion, the ci rcularizatlon burn for command module Casper was 
aborted when Ken Mattingly discovered some de s crep an ci es in 
the backup system which control the service propulsion engine. 
We still have a good prime system, that is a guidance and 
navigation system aboard the command module, however, we would 
be one failur--' ;iway for the very critical transearth injection 
maneuver which requires a fairly lengthy burn and a stable 
engine bell from the service propulsion system; therefore, 
quite a few people here in Houston and at the spacecraft 
manufacturer in Downy California are looking into the ramifi- 
cations of the backup system having apparently failed would 
this present any structural strain on the spacecraft if the 
engine bell went to full YAW, and would we be able to do a 
successful transearth injection with this engine. As all of 
these questions are answered the decision will be made whether 
or not to continue with the landing phase or to rendezvous 
and do a transearth injection burn using the descent engine 
on the lunar module, Orion. We have about 5 revolutions or 
some 10 hours in total time in which to make this decision. 
This, again, is dictated by the orbital mechanics. The fact 
that the lunar module would drift away from the desired ground 
track for the landing site at Descartes during any time passed 
these 5 revolutions. The gold team of flight controllers will 
stay on duty in the control center for the landing if a 
decision is made to land. If the decision is made to rendez- 
vous and do a docked descent propulsion burn to bring the 
spacecraft home. Pete Frank's orange team will take over. 
Some 4 minutes 37 seconds now away from acquisition and at 
100 hours even this is Apollo control. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h / 20 / 12 CST 15:57 GET 100:0 3 338/1 



PAO This is Apollo control 100 hours 3 minutes 

ground elapsed time. Less than a minutes away from acquisi- 
tion of Orion and Casper coming around the east Lim of the 
Moon on the 14th lunar revolution. Standing by for acquisi- 
tion here half a minute away. The atmosphere here in the 
control room is reminiscent of the period just after the 
cryogentic oxygen tank incident on Apollo 13, 10 seconds. 
We're waiting confirmation from the netword controller that 
we've had acquisition. We have AOS, lunar module. Lets stand 
by now for resumption of communications between the control 
center, Jim Irwin capcom and the crew of Casper and Orion. 

Houston, Orion, how do you read. 
Orion, this is Houston reading you loud 



noise 



ORION 

CAPCOM 
an d clear. 

ORION 
tenths of a 

CAP COM 
cess ive noise 

ORION 
tenths of a mile. 

ORION 
possible velicity 
wi th us . 

CAPCOM 

ORION 

CAPCOM 
have an answer. 

ORION 
probably be awhile 

CAP COM 

CAPCOM 

ORION 

CAPCOM 

ORION 
Pressure helium is 



Roger, sameo Jim. 
mile out from Casper now. 

Say again, Charlie 
d own h e re . 
I say our range to 



We're about seven 

We still have ex- 
Casper is about seven- 



And he's opening at 2 1/2 
to go up and above and come 



he put in so me 
down and get 



Ok. ay , we copy . 
The total is sliding. 

Okay 16 this is Houston. We still do not 
The people of working very feverishly. 
Orion, roger. Okay thank you. It'll 
before we get station keep it anyway. 
Ro ge r . 

St and by , Ken . 
Houston, Orion. 
Go ahead, Orion. 

Okay, we've got a RCS system A red light, 
looking lik e ... 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kJlQ/ll CST 16:02 GET 100:08 339/1 



ORION Okay, we got an RCS system A reg light 

Pressure helium is looking like 2300. The propellant is at 
210, the fuel manifold is ox manifold correction, make it 215 
or 220, and everything else looks pretty good. Pressures are 



holding up a 

CAP COM 

CAP COM 
loud and clear 

CASPER 

CAPCOM 

CAP COM 
where you got 
range? 

ORION 
Do you want us to 

CAPCOM 

ORION 
ab out if we 



- do you think the VERB system is gone? 

Roger, it looks that way to us, Charlie. 
Yes, Casper, this is Houston. Read you 



Okay . 

Roger we copy, Ken? 

Orion, this is Houston, we're wondering 
estimate of seven tenths of a nautical mile 



the 



We got the rendezvous radar locked on it. 
turn it off? 

No, tha t ' s fine . 

Houston, Orion, John and I have been talking 



like to probably 
and then we'd get 



get the land this thing, we'd 
ought to think about going to sleep first 
up in a full EVA tomorrow. 

CAPCOM Roger, we concur down 

CAPCOM Okay, Casper, this is 

recommending that you null the line of sight rates and 
fire 5 feet per second toward the LM. 



here . 
Ho us t on . 



We * 



re 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/20/72 100:13GET 16:07CST MC-340/1 



CAP COM 
CAP COM 



We copy you. Ken. 

Okay, Ken, we show you coming up on perilune 



n ow , 



so it'll be effecting your apolune. 



CASPER 

CAP COM 
we're hoping that - 
accurate. Ken. And 

CASPER 

CAP COM 
to the LM? 

CASPER 
level and 6500 feet 

CAP COM 
below and about one 

CASPER 

CAP COM 

CASPER 

CAP COM 

CASPER 
the re and he's 355 

CAP COM 
vinced that we want 
5 feet per second. 



That's affirmed. 
Okay, that sounds good Ken. 
- we think your state vector 
you'll be at perilune in 15 
That's affirmative. 

Ken, can you give us your position 



By th e w ay , 
was fairly 
minutes . 



Yeah, he's ahead of us, and I show 
out and opening at 3 feet a second. 



relative 



him abo ut 



copy your position, he s ahead, 
mile . 

opening at 2 1/2 on 1678. 



Okay, we 
nauti cal 
And he's 
Ro g e r . 

Three feet a second 
Okay, stand by. 
Okay, on the COAS , I' 
59 from local vertical. 
Okay, Casper, this is Houston, we're con- 
you to fire directly at the LM — about 
We want to get a positive close-in rate 



on the tape meter, 
ve got him bore sighted 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kjl^lll CST 16:12 GET 100:18 MC-341/1 



CAP COM 
at the LM, about 
closing rate. 

SC 

now , how ab out 
CAP COM 
SC 

CAP COM 

SC 

CAP COM 

SC 

Okay. No that 
thDse transients 
(Garble) 

CAP COM 

ORION 

SC 

bad DAP. 



We're convinced that we want you to fire direc 
feet per sedond. We want to get a positive 

Okay, it looks like the DAP isn't stable 
if I give it a VERB 46? 
Roger, we copy. 
Is that a good idea? 
Ken, we show you in 3. 
I am now but I wasn't 
Ok ay . 

Does that mean I'm clear to do a VERB 46? 
still doesn't work. I thought maybe I had one of 
For some reason everytlme we pick up CM/C/O. 



Orion, lets go low bit rate, 
You have it. 

Okay I got it under control 



Jim, I had a 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k I 1 11 CST 16:17 GET 100:23 342/1 



PAO A maneuver Mattingly was attempting was a 

5 foot per second line of site RCS maneuver toward the lunar 
module right now he's ahead and below the lunar module by 
about one nautical mile straight line distance. We would like 
to reemphasize that this will be strictly for a station keeping 
lunar landing is still not positively ruled out at this time 
depending on what decision is made on the - with reliability 
of the stabilization and control system to control the SPS 
engine on the service module. Continuing to monitor air ground 
from both spacecraft this is Apollo control 100 hours 
2 4 min ute s . 





ORION 




(Garble) . 




CAP COM 




(Garble) . 




ORION 




Okay, I guess - Houston do you want me to 


li ne 


of sight 


all 


the way in. 




CAPCOM 




Give me the range and range rate reading 


n ow . 










ORION 




Roger that's (garble). 10 000 feet loading 


at 3 


feet a second and we have a line of site ready. 




CAPCOM 




Re ady t o copy . 




CASPER 




Roger Charlie I'm standing by for instructions 




CAPCOM 




Yes Casper this is Houston. You should 


know 


the line 


of 


site rate s . 




CASPER 




Okay, you want me to keep them null and 


go all the way 


in 


Is that the idea? 




CAPCOM 




Roger, keep a positive closing rate. 




CASPER 




Okay, might be expense but we'll do 


tha t 










ORION 




Okay, why don't you tell me what to do 


the re , John . 








ORION 




Okay. Thrust down and I'll tell you which 


way 


the needle 


move s . 




ORION 




That's the wrong way, Ken. 




CASPER 




That's sure towards the Moon. 




ORION 




Were you thrusting? 




CASPER 




That's affirm. 




ORION 




Okay, thrust away from the Moon. That's 


doing it - a little more. You didn't get it corrected. Ken. 




CASPER 




How ' s tha t now? 




ORION 




Alright it's just not moving very much 


at all. 








CASPER 




Okay, that's a good place to stop. 




ORION 




No, it's going to be expensive to do this, 


but your going 


to 


have to thrust up. 


I' ve 


CASPER 




Okay, I just need some guides as to when 


got it null. 






ORION 




Okay, you don't have it null. 




CASPER 




How's that? 




ORION 




That's - you've got (garble). 



APOLLO 16 MISSION COMMENTARY kjl^lll CST 16:17 GET 100:23 342/2 



CASPER 

ORION 

CASPER 

ORION 

CASPER 

ORION 



How the range rate. 

3 feet a second close. 

Okay . 

Your at 66 RC. 
Still going down? 

That's affirmative. You've got it to 



3 milliradiance you've got it to 2 milliradiance , you've got 
it to 2 milliradiance - now you've got it. Ken killed it. 
CASPER Okay. 

CASPER Looks to me now like I'm drifting the 

other w ay . 

ORION Not according to my needle. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kJlQ/ll 100:28GET 16:22CST MC- 343/1 



CASPER 

way . 

ORION 
CASPER 
CASPER 
ORION 

6,300 feet. 

CASPER 
ORION 

( garb le) 

ORION 
CASPER 
CAP COM 



It seems now like I'm drifting the other 

Not according to my needles. 
Okay, I'll believe your needles, 
(garble) 

Three and a half feet a second, and you've 
Ok ay . 

(garble) activity here, so I can tell what 



Okay, you're rates are nulled essentially. 
Okay. Thank you. 

Orion, request to you select the secondary 
transmitting receiver. 

CASPER Okay, Houston, the Orion said that they had 

already selected the secondary. 



ORION 
CAP COM 
ORION 
ORION 
CAP COM 

1 1 . 

ORION 
4 feet per second. 
CASPER 
CAP COM 



Okay, Houston, how do you read now? 
I read you loud and clear, Orion. 
Okay, you're 5 by. 
How's the problem looking? 

16, no answers yet, we're still looking at 
Okay, Ken, you're at 5600 feet closing at 



Okay . 

Okay, Orion, this is Houston. We would like 
you to open the primary power amp circuit breaker on 16. 
ORION It's open, Jim. 

CAPCOM Okay, Orion, let's go high bit rate. 



END OF TAPE 



APOLLO 16 MISSION 


COMMENTARY 4/20/72 CST 16:27 GET 100:33 MC-344/1 


CAP COM 




Okay, Orion, lets go high bit rate. 


OR ION 




Right, you have high bit rate. 


CAP COM 




Roge r . 


ORION 




Gee, Ken, you're getting a line of sight 


rate y ou ' re 


going 


to have to thrust a little towards the Moon. 


Can we try 


this ? 




CAP COM 




Okay, we can't hold high bit rate, request 


you go b a ck 


to low bit rate, Orion. 


CASPE R 




that the right direction. 


ORION 




Needles didn't move. Ken. 


C A C "D T7 "D 

(j Ab r t K 




That's the right direction. 






Okay, that's up for me it looks like it 


O Ugh t t o b e 


down 


for you . 


CAP COM 




That sounds pretty good. Ken. 


L. Ab r Ji K 




Ok ay . 


r* A D r* AM 
Li Ar L< Un 




Orion, this is Houston, could you give us 


a range and 


ran ge 


rate readout? 


U K i U N 




Okay, 4900 feet, closing at 5. 


CAP COM 




Okay, 4900 closing at 5. 


ORION 




You got the line of sight rate (garble) now, 


^en • 






CASPER 




Okay. Man this is expensive. 


ORION 




Range nulled again. 


CAP COM 




They are nulled right now. 


ORION 




Okay. We're going to keep going this way 


and can we have some fuel point at which to cut off and switch 


over to LM power? 




CASPER 




Might be you can use it. 


CASPER 




It's really showing and I don't know how 



iiany more we're going to see on our way in. I'm reading -- 
of course the gages don't tell you exactly what it is but I 
have -- it's 65% you will not need. And all this stuff that's 



going to be in the lead plain, Houston, you got any thoughts 

3n a cut off point on the RCS. 

CAPCOM Stand by, Ken. Okay, well your at 4,000 

feet now at 5 feet a second. Ken. 

CASPER Okay, don't believe the instruments — 

CAPCOM And your line of sight rate is starting 

to build a little in the other direction. You've got it now. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/20/72 CST 16:32 GET 100:38 345/1 



CAPCOM Orion, this is Houston. Is the CSM above 

you or below you? We hope he's directly ahead. 

ORION He's 45 degrees above us. 

CAPCOM 45 degrees above. 

ORION Above the local vertical. 

CAPCOM Roger. 

ORION And he's got a 5 foot a second close rate 
and his line of sight anulled on the radar. 

CAPCOM Roger. 

CASPER And they look like they're killed completely 
on the optics too. Going to need your checker light here in 

a minute. You're just getting a little glance on right now. Okay, 
thank you. 

ORION Boy those rates look steady as they can be. 

ORION And we really got it killed. 

ORION (garbled) 

ORION And I guess we'll just come up along side 
( garble d) 

ORION That seems like a fair thing 

CASPER Alright. 

ORION Hey, Ken, you're going to have to thrust 
down a hair. 

CASPER Down to your right. 

ORION (garbled) 

CASPER Yeah, that's what I mean. You would 

thrust up. Okay, I think I got it killed again. 

ORION Looks pretty good. 

CASPER What's that closure rate now? 

ORION 0 5 feet a second. You're off 3 and a 
half feet a second now at 3000. 

CASPER 3 and a half feet per second. 

ORION Roger. 

CASPER Okay, all I've got is the tracting light 

on, I've lost the rest of your image. 

ORION You're gonna have to thrust a little more 

to kill that rate the same way. 

ORION Okay, that got a lot of it, but not all of 

i t . 

ORION Okay, you got most of it. 

CAPCOM Okay, Casp er, this is Houston, you might 
pick up a temperature caution light on your Quads but it's of 
no consequence. 

CASPER Okay, yeah I see B is up high, is that due 
to the thruster activity. 

CAPCOM Affirmative, Ken. 

CASPER Or is that due to heater? 

CAPCOM I think it is thruster activity. 

CASPER Rog. 



APOLLO 16 MISSION COMMENTARY kll^lll CST 16:32 GET 100:38 345/2 



CAPCOM Orion, this is Houston. Will you give us 

another range and range rate, John? 

ORION We have 3100 feet at 3 and a half. 

CAPCOM Okay, 3100 at 3 and a half. 

ORION Roger, at angle 68 degrees to local verti- 

c:al now. 

CAPCOM Understand 68 degrees. 

ORION Okay, Ken you got a slight rate going 

to the south according to my needle. 

CASPER Okay, let's watch that (garbled) 

before I start working on it, we haven't had any (garbled) to 
fiull up before 

CASPER How's the line of sight rate doing now, 

over. 

ORION 
CASPER 
ORION 
CASPER 
ORION 
CASPER 
e ction . 

ORION 
CASPER 
ORION 



Holding, the vertical is holding right on. 
Yeah, and range rate? 

You're at 3000 feet at 3 feet a second. 
Okay . 

4800 feet. 

Well, we must be going in the right dir- 

Yeah, you're going to get there. 
Yup. 

You better have 2 miliratings to the south 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY i^JlOIll CS T 16:39 GET 100:45 MC-346/1 



CAPCOM 

CASPER 
means I go to 

CAPCOM 

CASPER 

CAPCOM 

CAPCOM 

CASPER 

CASPER 

CAPCOM 

CASPER 

CASPER 
in the opposite 

CAP COM 



You do have 2 mi li ratings south. 
Okay, I'll take some of that out. That 
the south right? 
Yes . 

(garble) 

Yes, that's got most of it. 
Go ahead, 
(garble) 

(garble) lower engines. 
Okay, that's got it. Ken. 
Ok ay . 

Okay, it looks like I'm picking up a rate 
direction in the inflight gimbal. 

No, your not — you don't have any rate 



yet 



CASPER 
CAP COM 
CASPER 
(garble) whether. 



Okay . 

According to my needles . 
Alright. This is very much like the 
because of the deadband laying here. It 



looks 



like it takes a long time to pick up one of those readings. 

CAPCOM Orion, this is Houston, we want you to 

get the rendezvous radar and the tracking light off as soon 
as it's fe as able 

ORION 

n ow . 

CAPCOM 

CASPER 
to th e s o uth . 

CASPER 

ORION 

CASPER 

CASPER 
You still show 

CAPCOM 
sighted (garble) 



it s to conserve power. 

Roger, we will. It's not feasable right 

Well we understand. 

Okay it looks like I may be a little more 
Okay, Houston (garble) 
( garb le ) 

Well our needles don' 
Okay . 

Gee, I show quite a drift 
no out of rate 

Yeah, I don't show any and 
in that hole and I don't show 



t show it 



rate now, 



Joe 



I ve got you bore 
in motion there 



either. Just a little south, Ken 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY M20/12 100:50GET 16:44CST MC-347/1 



going to take 



ORION Just a little now. Ken. 

CASPER Okay, just like now I'm 

some of that out, 

PAO This is Apollo Control. Flight Director, 

Jerry Griffin, has instructed the CAPCOM to tell the crew that 
at acquisition of signal on rev 15 -- that's in spite of the 
next revolution — they'll be given a go no go for a landing 
on rev 16. Hopefully be that time the situation will have 
resolved itself on the thrust vector control system which 
drives the SPS. Apparently there is a problem in the yaw gimbal 
accuator in the service propulsion system. The decision has 
not yet been made, and hopefully will be made prior to the time 
of acquisition of signal on revolution 15. Some 19 minutes 
remaining in this 14th revolution. Add to that 47 minutes of 
backside pass, and at -- start of that rev we'll either be go for 
landing for immediate rendezous docking, and subsequent return 
home. This is Apollo Control at 100 hours 51 minutes. 

ORION (garble) closure rate. 

CASPER John, put a second on the tape meter. It 

didn't close the first half. 



ORION 

need a little 

CASPER 

ORION 

k ay . As long 

CASPER 

ORION 

CASPER 

CASPER 

ORION 

CASPER 

ORION 
I 



more 



Well, that's what I was just wondering -- 
p 1 us X. 

Okay, say when and how much. 
Okay, I'm going to put in foot plus X. 
as we're using brut force we might as well. 
Ok ay . 

Okay, that's about a foot. 



0- 



re 10 



000 feet at 
it w o rke d ! 



2. 



Ken, you're 
CASPER 
ORION 

in all . 

CASPER 

another foot 
ORION 
CASPER 

n or th . 

ORION 

CASPER 

ORION 

my (garble) 
CASPER 
ORION 



going 



Ok ay , you 

There you go -■ 
How about that? 

Yeah, I can see the LM in earth shine now. 

Okay, fine. You're getting over behind us 

to have to thrust toward us a little 

Okay, what's my range rate now? 



more 



Ok ay , 
per sec on d. 

Okay . 



You're at 2000 feet, but it's hard to close 
another foot. You can add 



give me 



Now you re starting to build a rate to the 



pi ane 



I don ' t think 
Yeah , I don ' t 
It just looks 
direction. Do I 

Yep, 3 feet a second, 10 000 feet 
Okay . 



those people are as good (garble) 
think you're quite as good, 
like I need to start reversing 
have a positive closure rate. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY Ml^lll CST 16:49 GET 100: 55 348/1 



ORION 
de finitely. 

CASPER 
with the COAS, 
ORION 
CASPER 
ORION 
CASPER 
ORION 
CASPER 



Okay, Ken you are moving toward us 
Okay. I'm getting you centered back up 



Okay . 

Hey you guys 
Say again. 
Do I still h ave 
That' s 
Okay . 



do I have a closure rate 



c lo s ure 
affirmative 2 feet 
Looks like the old 



of sitting here looking at itself. I m going 



sort 

ahead and use the CMS (garble) 
working out pretty good, here, 
indicator out of line. 



COAS on this thing 



rate ? 
a s econd. 
CMS is just 
to go 
That' s 



Fi ne . 
(Garb le) . 
Just a few 



ORION 
Your at 1500 feet 

CASPER 
looks pretty good 

ORION 
pretty good here. 

CASPER 
LM the re . 

ORION 

CASPER 

ORION 
1400 feet now . 

CASPER 

ORION 
an d I see you 

CASPER 

CASPER 

ORION Yes, it 

CASPER Okay. 
CAPCOM Orion, this is 

about 10 minutes to LOS and I have 
general plan when it's convenient. 

Go ahead. 

Okay, when you come 
we'll give you a go or no 



I think it's the (garble) 
you've got 4 mil 11 radi an ce so 
drifting in my COAS 



far, 



Okay, 
n ow 

I'm j us t barely 
here. 

Okay, we'll just drifting 
Do you see me at all. 
Yes sir and in your side I can see the 



in my COAS. You 



feet a second. Ken your about 



( garb le) 



Okay . (Garble) . 

Okay, and I' d say you were more 
drifting slowly across the (garble). 
Rog, and I can't (garble). 
(Garble) . 

still 3 milli radi an ce lower, 



Houston. We're showing 



ORION 
CAPCOM 
REV, REV 15 
And we'll be 
have pads for 
ORION 
CAPCOM 
CASPER 
CAPCOM 
in AUTO dump 



some words for you on our 



up on AOS on the next 
go for another try. 



looking at PDI at REV 16 and at that time we'd 
you on procedures. Over. 
Ok ay . 

And, Casper, this is Houston. 
Go right ahead. 

Roger, we want you to verify that your 
on the water. That's pressure relieve . . . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k I IQ I 11 CST 16;55 GET 101:01 MC-349 



CAPCOM This is Houston. 

CASPER Go right ahead. 

CAPCOM Roger. We want you to verify that you're 

in auto dump on the water, that's pressure relief in a number 
2 position, that's vertical. And if you have an opportunity 
to get av7ay from the controls there we'd like you to manually 



dump the water to 
about 17 minutes. 

CASPER 
wait till we 

CAP COM 

CASPER 

ORION 
starting to 



the backside. That should require 



10% on 
Ove r . 

Okay, I am in auto dump and I'll have to 
daylight to go down there I think 
Di d you copy . 
( garb le) 

Okay, Ken, the line of sight range is 
-- You'll have to thrust down a little I mean 



a little. That 

CASPER 

ORION 
th ous an d fee t 

CASPER 

ORI ON 

CAPCOM 
c on f i gure f o r 

ORION 
pull (garble) 

ORI ON 

ORI ON 

CASPER 

CASPER 

ORION 

CASPER 

CASPER 

CASPER 



fixed it. 

Ok ay . ( ga rb le ) 
(garble) 25 feet 
app roaching . 

(Garble) 
(Garble) 
Orion , th is 
RCS Bravo, only. 

Roger, will 



up 



per second. You're at 



we 'd like you to 



is Ho us t on , 
Ove r . 

open the (garble) 



crossfeed and 



We ' re 
Ok ay , 9 9 0 
Ro ge r . 
( garble) 
(garble) 
(garble) 
H o us t on , 
( garble) 



Con f i gure d , 

feet n ow . 

Got the line of sight range? 



Casper. (garble) 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h/lO/Tl GST 17:00 GET 101:06 350/1 



CAS PER 

ORION 

CAP COM 
2 minu'tes until LOS 
and Ken perhaps you 

ORION 
rate is null. 

CASPER 
710 feet feet per 
c opy Casper. 

CAP COM 

CASPER 

CASPER 

ORION 



(Garble) COAS here 

You' re upside down compared to (garble) . 
16, this is Houston. We're showing about 
and if you give us a range and range rate, 
can repeat it for us. 

Okay, 710 feet closing 2 feet a second 

Did you copy that Houston. The range is 
second the rate is null. Houston, do you 



Roger, 
Ok ay . 
Ok ay . 
Yes , I 



we copied down here, thank you. 



but 



it's 



Earthshine (garble). 
ORION Okay I 



can tell that I've got you, 
Rog. all sorts of (garble), 
have good comin. Man you just 
disappear got the spotlight on. I tell you the spotlight isn't 
nearly as good as earthshine, I'm really surprised. 

PAO This is Apollo control. We have loss of 

signal with both vehicles as they pass behind the Moon during 
the end of revolution number 14. At the start of revolution 
15 the crew of Apollo 16 still at this time station keeping 
in the two vehicles will be given a GO/NO-GO decision for 
power descent and landing during rev 16 which will be some 
4 hours from now. If the decision Is go and all of the 
maneuver timelines will have to be read up to the crew during 
the front side pass of revolution number 15. If the decision 
is no landing then the crew would precede to rendezvous, dock, 
and prepare the spacecraft for return home. To recap the 
situation the planned ci rc ulari z ati on maneuver by the command 
service module back prior to AOS on revolution 13 was aborted 
by Ken Mattingly when he discovered that the backup system, 
the stabilization and control system which in turn controls 
the gitnbal actuators on the service propulsion system ap- 
parently had a malfunction in the YAW direction in other words 
the driver that moves the engine bell left and right apparently 
had some exercusions of several degrees and fairly rapid 
amplitude, fairly rapid succession. Simulations are underway 
here at Houston and the command module simulator and some 
structural tests are underway at this time at the manufacturers 
plant Downey in California to determine if indeed the problem 
would present any structural hazard to the spacecraft should 
the backup SCS system have to be used in SPS burns, keep in 
mind please that the primary system the G &N system is still 
in perfect condition, but the mission rules call for both 
systems being operational before we have a go for landing. 
Some 44 minutes remaining now until acquisition and rev 15 
during the next three quarters of an hour the decision should 
be firmed up on a go for landing GO/NO-GO decision. And at 
101 hours 14 minutes ground elapsed time into the mission of 
Apollo 16. This is Apollo control 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hJ20/12 CST 17:38 GET 1^)1:^4 351/1 

V \ 

PAO This is Apollo Control 101 hours mln ute s 

into the mission of Apollo 16. 14 minutes before the start 
of revolution number 14 around the Moon. At which time 
shortly after the spacecraft, which now should be nose to nose 
station keeping, will come around the east limb of the Moon. 
They will be given a GO NO/GO decision from the ground on 
whether or not to make the landing during the succeeding 
rev - revolution, or lunar orbit number 16. To recap again, 
the source of the current situation and delaying the landing, 
the secondary Hack up system, which actually acts as a 

tillar for the large 20 000 pound thrust engine in the service 
propulsion system, or the main engine on the command service 
module, has experienced some difficulties in the YAW mode or 
the left and right motion of the engine. The engine is moved 
up and down, left and right by what are called gimbal actuators. 
This back up system in the command module guidance equipment 
Is used if there is a failure in the primary system, which is 
called the guidance and navigation, or the G&N system. And 
the flight mission rules call for both systems to be functioning 
perfectly before a landing is committed. Simulations at 
the manufacturers plant in California and in the command 
module simulators here in Houston have been under way for the 
last several hours to determine the possible effects of having 
this oscillation - left to right oscillation - by the engine, 
whether or not it would damage the spacecraft structurally. 
Some initial times have been generated here by the Flight Dynamics 
people on the maneuvers for a landing should the decision be 
made to continue with the landing. The command module ci r- 
cularization burn would be made at 1:03, 22:05. The power 
descent ignition or the start of the landing phase would be at 
104 , 17:20 ground elapsed time. These times are subject to 
change within a few seconds one way or another. To repeat 
again, some 11 minutes from now the two spacecraft will come 
around the front side to start a lunar orbit number 15. The 
spacecraft communicator will pass up to the crew the GO NO/GO 
decision for landing during revolution number 16. The crew 
has requested that if a landing is made that the EVA be post- 
poned until after they can have a sleep period. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hH^Ill 101:50GET 17:44CST MC- 352/1 



PAG This is Apollo Control 101 hours 50 minutes 

ground elapsed time. Manned Spacecraft Center Director, Dr. 
Christopher C. Kraft, Jr., just came back into the control 
center after having attended the meeting by management people 
in one of the back rooms, and the situation is go for landing. 
To reaffirm we do have a go for landing in revolution number 
16. That decision will be passed up to the crew at acquisi- 
tion of signal some 7 minutes from now as they come around 
the front side of the Moon. The new maneuver, timewise, will 
be read up to the crew for ci rculari z ati on by the Command 
Module and power descent and landing by Lunar Module Orion. 
To repeat again — we are go for landing. This Apollo Con- 
trol at 101:51. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kll^lll CST 17:50 GET 101:56 MC-353/1 



PAO this is Apollo Control, 101 hours 56 minutes 

ground elapsed time in the mission of Apollo 16. Less than 2 
iiinutes prior to acquisition of signal with Orion and Casper 
coming around from the rear face of the Moon. On the 15th 
revolution. As the conversation begins with the crew the word 
that we're go for landing will be passed up to the crew. Ap- 
parently during the simulations here and Downy in California 
it has been determined that the oscillations in the backup con- 
trol system which controls the motion of the large engine on the 
service p r op ul f ^n system, would present no structural hazard 
to the spacecrait. The backup system is go at this time and 
we've had no problem at all with the primary system, the G&N 
system as it's called. To repeat again the preliminary time 
for the command module circularization burn would be 103:2205 
for the power dessent initiation 104:1720. Standing by for 
acquisition some 20 seconds from now. Ten seconds away. New 
flight control team schedule being posted on one of the Idefor 
p roj e ctors . 

PAO you hear noise on the down link, waiting 

for confirmation from the network controller that we have solid 
lock on with the spacecraft. 

ORION We got AOS, lets see. 

CAPCOM Orion, this is Houston, 

ORION Hello, Houston. 

CAPCOM Roger, I have some switches and circuit 

breakers we want you to take care of to try to improve the 
comm situation. I'll give them to as soon as you're ready to 
copy . 

ORION Go ahead. 

CAPCOM Okay, we want on panel 12 track mode switch 

OFF, on panel 16 primary transmitter receiver circuit breaker 
open, S-Band antenna heater circuit breaker open, S-Band an- 
tenna comm circuit breaker open, and primary S-band power am- 
plifier open, then on panel 11 ac buss S-Band antenna open. 
Ove r . 

ORION Okay, turn off the track mode on 12 track 

mode OFF, is that right Jim? 

CAPCOM That's right, track mode switch OFF on 

;p ane 1 12 . 

ORION Okay, you'll have to find another name for 

that switch--oh okay we got it. 

CAPCOM It's been a long day. And Did you copy those 

circuit breakers, Charlie? 

ORION He's got them, we'll get them now. 

CAPCOM Okay, and you do have a go for another 

;:ry here at PDI on REV 16 and I have some words on that prob- 
lem with the PBC whenever you all are ready to copy. 

ORION Well I'm all ears, I don't know about. 

Ken. 

CASPER Looks, good. 



APOLLO 16 MISSION COMMENTARY 4 /20/72 GST 17:50 GET 101:56 MC- 35 3/2 



CAPCOM Okay, Orion can always tell Casper what his 
problem is but it looks like an open circuit in the rate feed- 
back and your servo loop. We've run exhaustive test down here 
on the West coast and the East coast, and c on t r o 11 ab 1 i t y aspect 
on structural aspect and everything looked 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 17:55 CST 102:01 GET h/20/12 35A/1 



CAPCOM Out here in the west coast, on the east 

coast on c ont rolab il i ty aspects and structural ability 
aspects. Everything looks satisfactory. On Apollo 9 we 
ran a similar test - was run as you probably remember 
and if such a - such a problem did occur up there, you 
could expect oscillation the course of the gimbal but 
you could expect a steady attitude there would be a limit 
cycle. So we're convinced down here that we have a 
satisfactory control mode if we have to revert to that 
one . Over . 

ORION (garble, heavy background noise.) 

CAPCOM Yeah, I hope Casper caught it. 

ORION Okay, Jim one thing - Jim, could you 

go through that switch just one more time - CB list one 
more time a little bit slower? 

CAPCOM Okay, Charlie on the circuit breaker 

list on panel 16 it was primary (garble) S-band antenna 
heater, S-band antenna comm, primary S-band power N and then on 
panel 11 just one AC buss S-band antenna - 

ORION Okay, we've got them all. 

CAPCOM Okay, understand that's complete - 

CAPCOM Okay (garble) let me give you some 

(garble) on this rev - read some pads up to you that will 
update and then we want you to repeat them to Oscar 1 and 
then you'll pick up on the timeline book thats (faded out). 

ORION Roger, copy. 

CAPCOM And some more information, if you'd 

like to copy it I have two sets 102 3550 and perform 
400 plus 3 after the P52 and for the P52 use the same 
stars as the P52 in the timeline book. And, of course, 
after the uplinks to you VERB 47, over. 

ORION Right, we copy all of that one thing 

you want us to do option 3 before the option 1? 

CAPCOM Negative, just the option 1. 

ORION Okay, okay, we're ready to copy. 

CAPCOM Okay, we're standing by for the pads. 

ORION All right, and - 

CAPCOM Orion, will you turn S-band ranging 

switch OFF? 

ORION Ranging is OFF. 

CAPCOM Let's go high bit rate. 

ORION You are high bit rate. 

ORION Is Casper going to get a little sep 

maneuver here? 

CAPCOM Yes, we'll be giving that and I have 

12, T3 aborts pads. If you're ready to copy Charlie. 

ORION Stand by. Okay, go ahead. 

CAPCOM Okay. Lima 10442 1664 111 03 30 00 T2 

at PDI plus 24 plus 54 and then T3, vector 106 25 11 81 , over. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hJlQ/12 102:06GET 18:00CST MC-355/1 



CAP COM 

ORION 

CAPCOM 

ORION 

CAPCOM 

ORI ON 
and we have Lima 
17 81 , over. 

CAPCOM 



— 81, ove r . 

Alright, same thing on Mike again. 
Okay, Lima is lOA 42 16 64 , over. 
Copy that, also Mike. 
Okay, Mike is 111 03 30 00, over. 
Okay, copy P2 it would be TE I plus 2454, 
104 42 16 64 111 03 30 00, November 106 25 

Roger, on November there it's seconds 1181, 



o ve r c 



04 



ORI ON 
CAP COM 
ORION 
CAP COM 
plus 00 0 



Kil o 



36 



p 1 us 



109 04 
ORION 
002 114 340 
CAPCOM 
Orion, we've turned 

ORION 
me d off. 

CAP COM 
all zeroes, plus 01 
plus 00 114 0 11 39 
zeroes minus 00 494 
profile 10% in 26 
ORION 

o ve r . 

CAP COM 

ove r . 

ORION 
all zeroes, minus 
08700 01 026 plus 
45 00 — 



C opy , 11 . 

And I have the PDI pad when you're ready 
Go ahead. 

Okay, here's India 
36 002 114 340 plus 56 9 80 
3000, over. 

Copy PDI pad. 
5 6 9 80, 10 7 0 5 
Roger, and now 
the biomed off 
Okay , go ahead 



first. 104 17 2 3 29 11 
Juliett 107 05 45 00. 



104 17 23 29 11 GO plus 000 
45 00 109 04 3000, over. 
I have the note PDI plus 12, 



Okay, you got the old bio- 



Okay, and here's note PDI plus 
023 plus all zeroes, minus 005 
035 all zeroes, 2 71 08700 plus 
105 18 all zeroes 107 05 45 00 
seconds pull throttle for remainder. Over 
Roger, copy. Give me the noun 42 begin, 



12 104 30 

0 0 01384 

01 026 all 
Throttle 



Roger, noun 42, 013 84 plus 00 114 Oil 39 

Roger, copy 104 30 0000 plus 01 02 3 plus 
005 00 01384 plus 00 114 0 11 39 0 35 000 271 
all zeroes minus 00 494 105 18 0000 10 7 05 



END OF TAPE 



PAOLLO 16 MISSION COMMENTARY hjl^lll CST 18:05 GET 102:11 MC-356/1 



ORION 00 494 105 18 0000 107 05 4500, over. 

CAPCOM Good, readback, Charlie. I have AGS 

support conscience when you're ready. 

ORION Stand by. Okay, I'm ready to copy. 

CAPCOM Okay, Orion, we're going to hold up, 

we've got to get some high bit rates. Orion, select down 
voi ce b ack up . 

ORION Houston, how do you read down voice back 

up , ove r . 

CAPCOM Orion, this is Houston, I read you very 

very weak. We want you to go to POO and data, we're going 
to send you some uplinks and we do not want you to transmit 
until the uplinks are complete. 

ORION Understand, we have POO and data. 

CAPCOM Orion, we want you to go to down voice 

back up. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k/lO/ll CS T 18:10 GET 102:16 357/1 

CAPCOM Orion, this is Houston with the new set 

pad and circ pad whenever you are ready. 

ORION Okay we're still getting uplink. 

CAPCOM Okay, no transmission. 

CAPCOM You guys should maintain radio silence 
up t h e re . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kjl^lll CST 18:15 GET 102:21 358/1 



ORION (Garble), 

CAPCOM Alright, Orion we have the uplinks in and 

I'm ready to give you the AGS abort constants. 

ORION Okay, stand by. Go ahead. 

CAPCOM Okay beginning with 224 plus 60529 plus 

29402 plus 60406 plus 00572 minus 32664 minus 54401 and we 
want you to reload 373 with plus 08574 change 254 to plus 
08817, over. 

ORION Okay, Jim we copy starting with 224 

plus 60529 2940n 60406 00572 32664 54401 load 373 with plus 
08574 254 plus 08817, over. 



662 



P ad 



CAPCOM 
and 6 73 
ORION 
CAPCOM 
if your 
ORION 
CAPCOM 



That's a good read back and, of course, 
are minus . 

That's affirmative. 

Okay, and I have the SEP pad and circ 



re ady 



Go ahead. 
Okay, SEP 



pad is 10230 all zeros 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h / 2Q / 12 CST 18:20 GET 102:26 MC-359/1 

CAPCOM At 102 30 all Os and on this clrc pad, 

ignition 10 3 21 42 43 NOUN 81 plus 00 69 1 plus all Os minus 
00 435 , over. 

ORION Okay, hopefully that's a sep pad, TIG of 

1032143 plus 00069 correction plus 00691 minus all balls 
minus 00435, over. 



CAPCOM 


Roger, that's the circ pad, the other the 


first one was the 


Sep pad. 


ORION 


Okay, just a TIG. Okay, we're going to 


get to work, start 


loading this AGS stuff. 


CAPCOM 


Okay, and after you load those AGS support 


conscience you'll 


be clean to pick up on the time line book 


at the circ burn. 




ORION 


Roger, after the P-52. 


ORION 


Ask them for a new DAP load or DAP (garble) 


it doesn't make any difference. 


ORION 


Why don't you do that, John, while I. 


ORION 


Okay . 


ORION 


I think we're alright but I got to load 


this stuff. 


ORION 


Houston, do we have a new LM DAP weight? 


CAP COM 


S t an d by . 


CASPER 


Or is that worth fooling with? 


ORION 


When we PITCH up like this I feel like I'm 


going backwards. 


In a (garble) burn inertia pull. 


CASPER 


Got to have (garble) 


CAPCOM 


Orion, this is Houston, we'd like you to 


open AC bus A taperecorder on panel 11. 


ORION 


Okay, it's going open. 


CAPCOM 


An d I have a FIFA bias 


ORION 


Okay , it's open . 


CAP COM 


when you're ready to copy. 


ORION 


Stand by. Man, go ahead. 


CAP COM 


Okay, address 1456 data 03141, over. 


ORION 


Okay, 156 mag U and the data. 


CAPCOM 


03141, over. 


ORION 


Roger, 1456 address 03141. 


CAPCOM 


Go od re adb ack . 


ORION 


We're entering that now. (garble)901 9 enter 



14569 enter load 0 314 -- 031 41 . That number I guess. Meanwhile 
(garble) 

CAPCOM Orion, this is Houston, we'd like you to 

open the update link circuit breaker on panel 11 and go to 
normal voice configuration. 

ORION Rog, update link 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h/2Qll2 CST 18:25 GET 102:31 360/1 



ORION Okay, Houston, Orion. How do you read 

normal voice, over. 

CAPCOM Very good. Much better, Charlie. 

ORION Okay. 

ORION Can you say something about our trajectory 

now? Are we still 17 000 feet south, the same as before. 

CAPCOM Standby, John, we'll have some words for you, 

ORION Okay. 

ORION And I assume you want to use both systems 

for PDI , both I^r:; ' s . 

CAPCOM We're still talking about that down here, 

John . 

ORION Okay. 

CAPCOM Orion, this is Houston. At the present 

time it looks like you will be coming in 16 000 feet high and 
about 20 000 feet south. 

ORION Okay, understand. 16 000 high and 20 000 

£> o u th . 

CAPCOM Roger. 

ORION Jim, Johnnie and I just laughing, we'd like 

to go back to the SIMS, please.. 

CAPCOM So would we. 

ORION Glad you turned the biomed off. 

ORION Houston, okay to do that P52 now? 

ORION Houston, are we clear to do the P52 now? 

CAPCOM Roger, as soon as you're in darkness. John 

Mas just - advisory, option 1. 

ORION Understand. Option 1 and we're going to 

gyro torq ue it. 

CAPCOM Roger. 



END OF TAPE 



/ 



/ 



APOLLo/ 16 
f 

aft OMNI^ now 
/ CAP COM 



ISSION COMMENTARY 4/20/72 CST 18:30 GET 102:36 361/1 
Jim, we had P52 we've got you on the 



ORION 



t o 



the old one 
CAPCOM 
ORION 
had ever commented 
around. 

CAPCOM 
CAPCOM 
another procedure 
ORION 
CAPCOM 



Ro ge r , we c opy . 

That one you read about was pretty close 
just a couple of degrees, right? 
That's affirmative, 

Man, when those jets turn on Jim, nobody 
before but it really horses this old thing 



Roge r . 
Okay, Orion 
we wanted you 
Go ahead. 
Ok ay , we want 



power amps circuit breaker on panel 11 
loose comm when you open that and then 
it and then we'll reestablish comm. 

ORION Roger, copy. We'll 

finishes marking. 

CAPCOM Okay. 



this is Houston. We have 
to try with the comm problem. 

you to open the secondary 

and, of course, you'll 
after one minute close 

do that after John 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h 1 1^ 1 11 CST 18:35 GET 102:41 362/1 

CAPCOM Orion, this Is Houston. How do you read me 

ORION Loud and clear. 

CAPCOM You're loud and clear to. 

CAPCOM Roger, could you give us your NOUN 93's 

we had lost data at that point? /; 

ORION Yes, sorry about that Jim. Here they are: 

the star angle difference was 4 balls 1 minus 4 balls 1, the 
torquing angles were minus .067 plus .198 plus .050 torque 
at 104 42 25. 

CAPCOM Roger, copy NOUN 93 is minus 0.067 plus 

. 108 pi us .050 over. 

ORION That's affirmative. 

ORION Hey, Houston, I don't know where Ken is 

at this point when we messed up into our P52. I trust he is 
still keeping an eye on us. 

CASPER Are you Ken. 

CAPCOM (garbled) trust to. 

CAPCOM And Orion, this is Houston. A reminder on 

the 400 plus 3 and a VERB 47. 

ORION Roger, we already did that. 

CAPCOM Okay, very good. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h/lQIll CST 18:40 GET 102:46 363/1 



CAPCOM 
your mike a little 
lower than Johns. 

ORION 

CAPCOM 

ORION 
turned my head I 

CAPCOM 

ORION 



Charlie, this is Houston. Could you put 
closer your volume seems to be a little 



of them up everytime I 



better in 
I had s ome , 



Okay, how's that? 
That's better. 
Okay, I had one 
get orange juice. 
Ro g e r . 

It's de 1 i ci o us , 
your mouth than floating around the 
CAPCOM I know what you 

ORION 
orange shampoo with 
CAPCOM 
ORION 
impressed with that 
sure looks exactly like the L&A. 

CAPCOM Okay, Charlie 

the orange juice problem, did you 
ORION Well, I think 

command module water had a lot of 
course, when I put my suit on it sort of compressed every- 
thing and everytime my mike comes by and grabs the valve it 
bends it down just slightly which is enough to cause some to 
squirt out due to the pressure from the suit. Over. 

We copy . 

I have the same problem all the time in 



Jim, but it's 
cockpi t . 
mean. I wish 
As a matter of fact I've already had an 
the helmet on. 

I guess that's better than no shampoo. 
Yes, I think your right. We were really 
landing site from 10 miles, anyway, it 



we're kind of curious 
have a bag failure? 
it must be the valve, 
air bubbles in it and, 



ab o u t 

The 
of 



CAP COM 

ORION 
one g . 

ORIONM 
on your visor and 

ORION 
how do you read? 

CAP COM 
concerned about - 

ORION 

CAPCOM 



Yes, 1 g though, you bend over and it's 
you can lick it off. 

transmitting VHFA simplex, 



Casper, Orion 
Charlie, this 



IS 



Houston, we're kind of 



Casper, Orion - - 

- how much orange juice might have spilled 
out. We're concerned about the amount it might have got in 
the suit loop and its affect on the LIOH canister. 

ORION Jim, most of it for some reason floated 

up under my helmet - I mean my Snoopy hat and I'm pretty 
sticky around the temples and all and I don't think anything 
most of it stuck right in my helmet and the suit loop flow 
is not enough to drive it down into the suit. And I don't 
feel like I'm wet at all down in that area. Over. 
CAPCOM Okay, thank you, Charlie. 

ORION Yes, I don't think there is any of it 

in the suit loop to amount to anything. Looking at Charlie 
I can tell where most of it is. 

ORION Yes, Ken I was just seeing how you read 



APOLLO 16 MISSION COMMENTARY k 1 1^ 1 11 CST 1840 GET 10246 MC363/2 

ORION we're all set to go for your CIRC. Okay, 

what kind of sep maneuver did you do? Alright thank you. 
CAPCOM Orion, let's try biomed left. 

END OF TAPE 



APOLLO 16 MISSION COMMENTARY h / 2Q 111 CST 18:45 GET 102:51 MC-364/1 
CAPCOM --biomed left. 

ORION Okay, you got Johns arrhythmia. 

CAPCOM Roger. 

ORION Houston, Orion, I'd like to confirm that 

in system A we have enough ullage volume to get all the pro- 
pellents out of the tank. Over. 

CAPCOM That's not correct, Charlie, we'll give 

you the exact number in here shortly. 

ORION Okay, we're still looking at 2000 by 21 

circs PSI on the helium. 

CAPCOM Orion, this is Houston, in answer to your 

question, Charlie, if you were to lose source pressure right 
now you could get 35% out. 

ORION Okay, we only have 50% remaining. 

CAPCOM Understand. And at 35% is enough to 

complete the mission. 

ORION Okay, do we have a double failure here 

on the 2 REGs and that loop? 

CAPCOM That's affirmative. 

ORION Okay, so what's holding us is that check 

valve that unseats at 2, about 225 and reseats at 2 12? 

CAPCOM That's correct, Charlie, and really you 

should have about 60% in that system. Your gauge has an 
error. 

ORION We cop — Rog we copy. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h JlO /ll 18:50 CS T 102:56 GET 365/1 



ORION Houston, Orion. 

CAPCOM Go ahead, Orion. 

ORION Right, Jim, we watched Ken's 

dump and I can see why that thing really gives 
it really comes out of there like a water hose 



w as te wa te r 
FIDO fits. 



CAPCOM 

ORION 
I hope they come 
li gh t in g . 

CAPCOM 
p i ctures of it, 
half to LOS. 

ORION 

CAPCOM 



Okay, we copy. 
And we took a picture 
out to show you that, we 



of it or two and 
had p ret ty good 



Good, we hope you have some good 
and we're showing about 2 minutes and 



Rog, AOS 
S t an d by 



t i me p 1 e as e . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h I IQi 1 11 18:56 CST 103: 02 GET 366 



ORION good lighting. 

CAPCOM Good, we hope you have good pictures 

of it, and we're showing about 2 minutes and a half to 
LOS . 

ORION Rog, AOS time please. 

CAPCOM Stand by. AOS for rev 16 is 103 51 25. 

ORION Roger. 

PAO And we've had loss of signal as Apollo 

16 spacecrafts Orion and Casper have passed behind the 
Moon. Nearing the end of lunar orbit 15, some 47 minutes 
before spacecraft come around for the 16th revolution 
and subsequent landing which is now scheduled for ground 
elapsed time of - actually the ignition for PDI, powered 
descent initiation will be at 104 17 23 with the landing 
some 12 minutes later. The powered descent will have 
a total velocity change of 6 70 3 feet per second. The 
crew has been advised that is the crew of Orion that they 
will be about 16 000 feet high above the normal flight 
path at the time of powered descent, and some 20 000 
feet south of track. However, the lunar module guidance 
system will guide the spacecraft to take these discrepancies 
on normal landing. After landing the crew will then have 
a sleep period prior to beginning the first EVA which 
at this time is scheduled to begin at 118 hours 30 minutes 
ground elapsed time or about 10:30 a.m. tomorrow morning 
central time. The decision on whether or not the EVAs will 
be their full length a total of 21 hours will be made during 
the night while the crew is asleep. Such factors as the 
consumables remaining such as battery power et cetera in 
the lunar module will have an effect on this decision. 
To go back and recaptulate, the reasons for the delay in 
landing as Ken Mattingly on his ci rcul ari z ation burn during 
revolution number 13, he experienced a oscillation in the 
yaw mode for the service module engine during checkout and 
it turns out that the secondary serval loop or one of the 
circuits for the yaw glmbal drive which can be controlled 
by either the G&N system or the stabilization and control 
system which is a backup mode apparently had this 
oscillation in it. Subsequent simulations and tests here 
and across the country have found that there is no potential 
structural hazard to the spacecraft even if it were necessary 
to go to the mode where there might be some chatter oscillation 
in the yaw gimbal. Gimbal is the yoke on which the engine 
is mounted one for pitch and one for yaw and the thrust 
vector control system in effect acts as a tiller for 
turning the engine much as you would use a handle on an 
outboard motor to direct the thrust of the propeller; the 
thrust vector control aligns the engine through the center 



APOLLO 16 MISSION COMMENTARY kH^Ill 18:56 CST 103:02 GET 366 /2 

PAG of gravity of the spacecraft. At 103 

09 Into the mission of Apollo 16 this is Apollo Control. 

END OF TAPE 



APOLLO 16 MISSION COMMENTARY klKijll GST 19:43 GET 103:49 MC- 36 7/1 



PAO This is Apollo Control, 10 3 hours 49 minutes 

ground elapsed time. Less than 2 minutes before Apollo 16 space- 
craft Orion and Casper, come around on the 16th revolution. Some 
27 minutes away from ignition for the power dessent and subsequent 
landing which should take place around 8:23 P.M. central standard 
time. Ignition for the dessent to the lunar surface Is now pro- 
gramed for a ground elapsed time of 104:17 23 seconds. As Cas- 
per comes around the corner it should have circularized its or- 
bit around the Moon with the burn maneuver for ci r culari z a t i on 
having taken place at 103:22 ground elapsed time, some half hour 
ago while the spacecraft was behind the Moon. The lunar module 
Orion weighing some 18 tons now will weigh half that amount at 

this weight loss is propellent that 
engine. Here in the control center 
the center display panel in 
changed around from lunar or- 
we have CSM AOS as confirmed 



touch down, some 9 tons, all of 
will be consumed by the dessent 
all of the scribing plotters in 
the front of the room have been 
bit tracking chart to show the - 



by the network controller. We'll come up live now wtih the 
air to ground circuit to monitor the next hour and half front 
side pass on REV 16 and hopefully a successful landing. 
ORION Hello, Houston -- 

Orion is-- 
16 here. Loud 
Okay , I h ave a 
Ok ay , Jim I — 

on panel 12 where you get the function to 
panel 11 update a link circuit breaker closed. 
Update a link is closed, switch to 



CAPCOM 
ORION 
CAPCOM 
ORION 
CAP COM 
range and on 

ORION 
r an ge . 

CAPCOM 
report. 

ORION 
at 123:42 

CAP COM 
bats are 
ORION 
CAPCOM 
ORION 
ORION 
CAPCOM 
ORION 
CAP COM 



an d clear, Jim. 
couple of — 



on 



ED 



Roger. And I'm standing by for your 

And, Jim, okay, we got the assent bats 
The ED bats are go at 37 volts. 

Roger, copy. The assent bats 103:42 and 
good. And I have a PDI — 

And we were on averter 2 for awhile. 
Copied, you were on averter 2. 
Go ahead. 
Go ahead. 
Okay, -- 

Just for a little while. 

India 104 17 24 66, data 2 31 plus 56 990 



Ove r . 



ORION 
CAPCOM 



Copy, 104 17 2 466 plus 
Good readback. 



56 



2 31 p 1 us 
990, for 



56 
2 31 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h/lO/ll 19:49 CST 103:55 GET 368/1 



ORION 

CAP COM 

ORION 

ORION 

CAP COM 
DATA we'll send 

ORION 

CAP COM 

CAP COM 
words for you 

ORION 

CAPCOM 
roll trans at 
and on the RCS 
y o ur 



on 



th e 

of 



Okay was that 5 6991 or 0, Jim? 

56990 

Okay . 

Do we have an uplink, Jim? 
Roger, if - you have POO if you go to 
you some uplinks. 

Okay you have it, POO and DATA. 
Okay, they're on their way. 
And Orion, this is Houston with a few 
RCS ignition. 

Okay, go ahead. 

Roger, John, you can anticipate a slight 
end of ignition because of CG position 
course, we want normal configuration and 



OFF? 



RCS quantity 


system A is OFF because of 


the 


high 


;ure in that 


system it's off by 


ab 


out 13 


percent. 


ORION 


Okay . 










CAP COM 


- 13 percent mo 


■re 


t h an 


in di 


c a te d 


ORION 


Un de rs tan d. 










CAP COM 


Orion do you have 


a VERB 


33 


on th 


ORION 


That' s af f irmati 


ve 








CAPCOM 


Ok ay . Let's do 


an 


enter 


on 


that , 


CAP COM 


We ' ve lost h igh 


bi 


t ra te 


w e 


h ave • 


ORION 


VERB 33 entered. 










CAP COM 


We have one more 


u 


p 1 ink 


to s 


en d . 


ORION 


Okay . (noise) 










CAPCOM 


Orion , will you 


turn the 


f un 


ction 


ORION 


Function is off. 




Whi ch 


one , 


Jim? 


CAPCOM 


That' s the S-band 


f uncti 


on s . 




ORION 


All of then? 










CAPCOM 


Negative, the on 




th e r 


angi 


ng sw 


ORION 


Okay, its going 


off . 







DSKY ? 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k jlQ 111 CST 19:54 GET 104:00 36 9/1 



CAPCOM Orion, this is Houston. We want batteries 
to read OF F now. 

IRION Roger. 

CAPCOM Roger. Put a little more load on the 
as cent Bats. 

ORI Right battery 3 is OFF. 

CAPCOM Roger. 

ORION Jim, could we YAW right a little bit and 
point that OMNI right at you, would that help? 

CAPCOM Standby. 

ORION Hey, any word on the uplink, Jiin? 

CAPCOM Why don't you put in that YAW maneuver. 
YAW right 20 degrees, that might help. 

ORION Roger. 

ORION Here's YAW right 20. 

CAPCOM Roger. 

ORION Jim, how about reading that up to me and 
I'll copy it down. 

CAPCOM Looks like we're getting good data now 
Charlie, standby. 

CAPCOM We're uplinking now. 

ORION Okay, Jim, I think we'll start the - John 
says we'll start the PDI from zero YAW since the OMNI is pointinj 

right at you. That be better for you? 

CAPCOM Standby. 

CAPCOM Okay, Orion, we're finished with your com- 
puter. 

ORION Okay. 

CAPCOM Okay, Orion, this is Houston. That zero 
YAW looks okay. 

ORION Alright, fine, thank you. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kjl^lll 20:00 CST 104:06 GET 370/1 



ORION 



Call P63, John. How do you read us now. 



Jim . 



CAPCOM 
ORION 
CAPCOM 
ORION 
ORION 
configuration card. 



and clear, 
loud and clear 



okay ? 

and clear. 



Lo ud 

Read loud and clear on vox. 
Yes, sir, John, you're loud 
Ten minutes . 

Okay, let's check the DPS 
CB 11 DECA gimbal A/C closed (garble) 



clos ed index 
closed. SCS 
AEA. 

ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
descent command 
ORION 
ORION 

an d 



5 closed. CB 16 displays and override logic 
(garble) step control all closed except the 



All closed except the AEA. 

Okay 2 5 degrees a second. 

25 degrees a second. 

(garble) control auto commander. 

Auto commander. 

(garble) translation of 4 jets. 

4 jets valve couple on engine gimbal enabled 
ove r ri de off. 
Off, go. 

Fourth stage reset Deadband 



attitude control 3 to mode 
ORION Go. Okay, 

computer mark in the PGN PNG's 



control PNGS AGS auto. 

On highball landing radar 
guidance AGS mode select 



Altit ude 
39 . 



altitude rate. Impression 1220 ambient pressure 



CAPCOM 
RCS configuration 

ORION 

CAP COM 

ORION 
that went on 

CAPCOM 

ORION 
verfied FDAI Oil, 
NOUN 20, please. 

ORION 

ORION 
pi us 1 going in. 

PAO 

of Orion is 



Orion you can configure for normal 
n ow . 

Okay, system A is on. 
Ro ge r . 

Hey, Jim we got RCS 
pressures are good though. 
Ro ge r . 

Okay, John, the DET is set okay FDAI 
trim it up a little bit. VERB 40 



A re g light when 



Got it Charlie, (garble) 

AGS and PGNS are aligned at the zero, 
And the needles to (garble) 433. 

This is Apollo Control. While the 
going through their predescent checklist 



410 400 



crew 

a word on the command and service module, Casper. The 
ci r cul ar iz ation burn was on time. The current orbit is 
53,1 by 67.8 nautical miles. Back to Orion. 

ORION Okay, we are cleared down to 5 minutes 

At 5 minutes, we close the landing radar breaker. Right, 
(garbled sentence) second trans mission also cuts in and 
out. The old Earth is sure pretty. 



APOLLO 16 MISSION COMMENTARY l^/2Q/12 20: 00 GST 104:06 GET 3 70 /2 



CAPCOM Orion bring battery 3 on at minus 5 

ORION Roger, copy. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hno/ll CST 20:05 GET 104:11 MC371/1 



ORION 
PAO 

scent phase all the 
will be reading off 
of numbers actually 



Ro ge r, copy . 

This is Apollo control. During the de- 
way to touch down the lunar module pilot 
numbers out of the computer. Three sets 
one the angle at which the commander should 
look through the grid on his window toward the landing site. 
The other numbres have to do with the vertical velocity or 
descent rate and horizontal rates these are all coming out 
of the computer he reads them to the commander back to Orion. 



ORION 
CAP COM 
ORION 
CAP COM 
ORION 
PAO 
final Stat us 
for a go for 



trim - 



of all 
PDI. 



. 82 . 

Say again the reading 
Adaptive transmitter. 
Roger, copy 3.4 and 3, 
Corre ct . 

Flight director Jerry 
the positions here in 



on the velocity . . 

3 . 8. 
8. 

Griffin taking a 
the control center 



on , 



th in g 



on 



30 



CAP COM 


Orion, your go for PDI. 








ORION 


Roger, go for PDI. 


And go for 


f in al 


ORI ON 


No. 










ORI ON 


Looks better than it 


did. 








ORION 


Go ahead and enter. 










ORION 


En te r 










ORI ON 


Go, watch is set and 


wound. 








ORION 


She che cks . 










ORI ON 


About a second off h 


e re . 








ORION 


Okay, stand by for 2 


min ute s 


, Joh 


n . 


ORION 


Roge r . 










ORION 


Ok ay , good . 










ORION 


Target about 10 miles it looks 


11 


ke . 


ORION 


Excellent. Okay, 2 


min u te s 


mas 


te 


r arm 


ORION 


Master arms on, two 


ligh ts , 


Ho us t 


on . 


CAP COM 


Roger, copy 2 lights 










ORION 


PGNCS in mode select 


, 367 is 


in 




Ne xt 


is at 30 


seconds, John. Turn the 


P age . 








ORION 


Hey, Jim you want us 


to t urn 


th 


e 


ranging back 


CAP COM 


N e gatl ve . 










ORION 


Okay, we're In voice 


b a ck up . 








CAPCOM 


Ro ge r . 










ORION 


5 0 s e con ds . 










ORION 


Okay at 30 we had en 


gine arm 


th 


en 


we - 



second engine arm goes to descent, then we ullage burn. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hjl^lll 104:16 GET 20:10 CST 372 



ORION 




5 0 s e con ds . 




ORION 




Okay, at 30, we had engine arm, then 


we 


30 seconds enigne arm goes to descent then we ullage. 




i Ku J— OK ay. It 


s in 


arm descent — 








Arm is descent altitude light velocity 


i X g 11 L . 








DTJ T DM 




No 111 1 fipf' T) 1 11*^ X 




O R T ON 




Upon ignition you start push button 


i f 


we get ullage. 








ORION 




Ul lage? 




OR T ON 




Auto ullage. 




ORION 




B RAVO . 




0 RI ON 




Ok ay . If It starts. 




ORION 




It's s tarted 




OR TON 




It says command over-light is on. 




n R T O M 
U K i U IN 




Put your throttle in min. 




L Ar L OM 




Roger, we copy. 




U K X U IN 




All right. Descent Engine command over 


ride master arm 


off 






r\ TT- ~r *^ ivT 

ORi ON 




Master arm is coining off. 




CASPER 




Standby for throttle up, thrust to 




weight is okay. 








UKi U rJ 




22 , 2 3, 2 4, 25 , 26 , throttle up 




UKXuN 




On time .' 




U K 1 U IN 




Feel that beauty come on! 








Roger, we copy. 




ni? T ri M 




The thrust to weight is good — 




nnn foci- — — 


they 


w ere righ t on I 








You're looking at a minute. 




n p T r» M 




Say, Jim, at pitch over do you want 


me 


to on APS OMN T 


or 


stay forward? 




L* /ir U U JM 




Stay forward and you've got to go at 


on e 


n 13 T n w 
U i\ 1 U IN 




Ro ge r . 




U xt _L U IN 




Hey, we're way high, John, we got to 


get 


^ T_T n LJlJ'DTT ri^ /- » Vi 

QUwii, n ay nxgii 


on 


the H dot. 




U K 1 U IN 




All right, all right, just a minute 




uiiarxie. uown 


to 45 aire ady , 




n T3 T nw 




Does it look good? Passing 1:30. 




p A P r HM 




Okay, Orion, I have a 169 (garble). 




HT? T n W 
U K. X U IN 




Double H dot almost — 




O P T HN 
W Iv X W IN 




Go ahead. 




PAP r* riM 




Plus 0 0 80 0. 




U K 1 U IN 




Plus 00 800. 100 feet 




p A P r n M 




an d you go 




PAP roM 




Excuse me John. 




ORION 




Okay that's centered. Dead centered 




ORION 




Passing 2 minutes 




PAO 




Some 180 miles to go to the landing 


site 


ORION 




You yaw out here at 3. 




ORION 




I can take that out when we get it 




( g arb 1 e ) . 






ORION 




Hey, the PGNCS is tracking right on 


Jim. 


CAPCOM 




Ro ge r . 





APOLLO 16 MISSION COMMENTARY h/lOHl 104:16 GET 20:10 CST 3 72 /2 



ORION 

CAPCOM 

ORION 

ORION 

ORION 

CAP COM 

ORION 

PAO 

ORION 

ORION 

CAP COM 

ORION 

ORION 

ORION 

ORION 

ORION 

ORION 

ORION 
light at this time. 

CAP COM 
ORION 
ORION 
are out at 50 K» 
ORION 
ORION 
CAP COM 
ORION 
PAO 
ORION 
CAP COM 
PAO 
ORION 
CAPCOM 
PAO 
ORION 
little bit in altit 
ORION 
CAPCOM 
ORION 
ORION 
difference now. (g 
CAPCOM 
ORION 
ORION 
ORION 
CAPCOM 
ORION 
Right on. 
PAO 



f o ot a s e cond 



within at a 10th of a 
Roge r. 

It's three minutes, propellants -- 
Pressures are holding good in the DPS 
All oxidizer pressures look good. 
Orion you're go at 3. 
Roger, go at 3. 

One hundred thirty five miles down range. 
Roger, we copy. 

And there's still 37 volts, Jim. 
Roger, we copy. 

Velocity lights out, Charlie. 
-- on transmitter, probably -- 
We got a -- 
Watch it now 
(garble) 

What now, Charlie? 

I said, there's no way to get the altitude 

Orion, you go at 4. 
We ' re 50 000. 

Look at that altitude and velocity lights 

Isn't that amazing? 
Copy that Houston? 
We c op y . 

Look at that data, Houston. 
Ninety miles to go. 
You won't ACCEPT it? 
Okay, you have a go to ACCEPT. 
Horizontal velocity 3200 feet per second. 
Hey , it's in . 
Roger. 

Descending at a 112 feet per second. 
AGS and PGNCS will be getting off a 
ude n ow . Up da te . 
At 5 minutes. Coming in like gangbusters. 
Rog, and you're go at 5. 
Ro g e r , 

39 000 hey, look at that 136 feet 

arble ) 

AGS tracking about a thousand high. 
Roger, you get there. 

Six minutes, we should be at 32 000 -- 
It's not back on profile but almost. 
John, you're go at 6. 

Forty-five percent right on, Roger. 



Thirty-nine miles to 



go- 



APOLLO 16 MISSION COMMENTARY kll^lll 104:16 GET 20:10 CST 372/3 



PAO Passing through 33 000 feet. 

ORION It is 6 30, it should be at 30 000, mark it, 
32 000, 6 30, okay, looking good, John. 

ORION That angles getting down there. 

CAPCOM Throttle down 7.3 

ORION Understand 7.3- 

CAP Roger. 

ORION (garble) mark it, 

CAPCOM (garble) 

ORION Seven minutes, (garble) go 104 down 28 000 

still about a thousand high, it looks like. 

ORION It's starting to look pretty good.. 

ORION Down 22 3, setting up ready, the AGS 

ready at 14 K, then I do a 360 and then turn the camera on 
Breaker is in. Throttle down. 



ORION 




On time 


PAO 




Sixteen miles to go. 


ORION 




Jim? 


CAP COM 




Loud and clear. 


ORION 




Do a clip in a little bit, John.. 


ORION 




Ok ay . 


ORION 




Twenty-one thousand coming up on 


8 min ute s . 






CAP COM 




Roger, you're go at 8 


ORION 




I can see the landing site from here. 


Ch ar lie . 






CASPER 




Go at 8, John's got a visual. 


CAPCOM 




We copy. 


ORION 




One-hundred and thirty we're right 


on , John . 






ORION 




What ? 


ORION 




Right back on profile. 


ORION 




How does it look to you? 


ORION 




— r i gh t in th e re . 


ORION 




Okay, standing by to update the 


AGS . 






ORION 




Had a little roll steering here. 


CAPCOM 




Monitor descent one ■ 


ORION 




Roger, descent one. 


ORION 




Hey, Jim, we got about a 3 degree roll 


command in. 






CAPCOM 




Ro ge r . 


ORION 




enter 360 minus 01 72 Denter 36 7 is 


c omin g up , 


an d I 


'm starting the clock, I mean the camera. 


CAPCOM 




Go at 9 . 


ORION 




Ehey , we're under 12 000, John. Go at 


9 coming down at 


a 182, a little steep, hey we're going to 


be right on 


it. 


just about right on, maybe 10 feet -- 


10 000 feet 


stand by. 64 at 8200 PRO -- 


ORION 




Pitch over — 


ORION 




Pitch over -- hey, there it is -- 


Gator, Lone 


star 


ri gh t on . 



APOLLO 16 MISSION 

ORION 

ORION 
North Ray, looks 
John, there's not 

CAPCOM 

ORION 

ORION 

ORION 
profile. 

ORION 

to be a little fast 
ORION 
ORION 
ORION 
now looking good 



COMMENTARY 4/20/72 104:16 GET 20:10 CST 372/4 
Call me the PGNCS, Charlie. 
Okay. 38 degrees. Palmetto 
ike we're going to be able to 
too many blocks up there. 

Rog, you're go for landing. 
Okay, 4000 feet, 42 LPD, 3900 
Two to the south, Charlie. 



in s i gh t , 
make it 



Ok ay , 
An d w 



it's in . 



f ee t 
feet 



on 



re 



41 LPD 30 000 
coming right down -- it's going 
41 LPD 2000 feet 60 on profile. 



It looks 
Ok ay . . 

Forty-two LPD, couple more in, 1400 feet 
Out of a 1000 feet right on pro- 



^^"''^ ' dropping out the bottom now, 800 feet 30 down. 

Okay, Houston, we're going to be just 



ORION 
a little long, 



CAPCOM 
ORION 



Spot 



Ro ge r . 
-- but 



we re just now a beam of Double 



John 



300 



CAPCOM 
ORION 
ORION 
ORION 

Okay , 
ORION 
ORION 
comes the shadow 

of clicks up, 5 down at 130 feet, 
looking good. Perfect place over 
big boulders -- not too bad, okay 



22 down at 500 feet 



the left. 



Copy . 

Tw en ty- th ree , 
Okay. 

The big blocks over here to 
feet, 15 down. 

Okay, okay take over Charlie. 
Okay. Okay, fuel is good -- 10%, there 
Okay 200 feet, 11 down, give me a couple 

two forward, no more drifting 
here, John, a couple of 
80 feet down at 3 
. down at 3, 50 feet, down 
at 4, give me one quick up backing up slightly, okay 2 down 
standby for contact, come on let her down, level off, let 
her on down, okay step 6% plenty fast, contact, stop! BOOM 

Arm. Wow.' Wild Man look at that. Okay 413 - - 

Well, we don't have to walk far to pick 
in front of them, open, close, open, close. 

Old Orion has finally hit it, Houston, 



looking super. There's dust okay 



PROBE Engine 
ORION 

rocks , we ' re 
ORION 

FANTASTIC'.' 

ORION 

left and see 



up 



( garble) 
(garble) 



- can look right out to the 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h 111 CST 20:24 GET 104:30 373/1 



ORION Orion is finally here, Houston. Fantastic! 

1 can look right out to the left and see (garbled) and we're 
about — 

CAPCOM You're left OMNI, you're right? 

ORION Okay, you got it. Hey, we're forward to the 

north of - forward and to north of Double Spot I guess about 200 
meters to the north and maybe 150 meters to the west. Not flat 
lands, though, Houston. 

CAPCOM Roger, I copy 200 meters north and about 15 0 

me te rs west. 

ORION Man, I can see all the way to the ground 

just like flying the LTV, piece of cake. 
CAPCOM Thats good. 

ORION Ascent Pressures look good. 

ORION Okay, ascent helium monitor, cycle, I did. 

02 ascent sleepy. FantasticI Perfect precision is plane 
and one on the plains of Descartes. 

CAPCOM Well. 

ORION Hammerstock I better go easy on this land to 

radar circuit breaker, huh? 

DUKE Yeah, don't - okay that's the right one. 

The camera's off. 

Hey, it sure ain't flat, John. There's 
that ridge to the north. 

YOUNG Yep, sure is. 

DUKE All we got to do is jump out the hatch and 

we got plenty of rocks. 

YOUNG Houston -- 

DUKE Boy, it sure looks like you could make - 

let's see, Crown Crater from here; I can see Ray Crater from here. 
Got it. Boy! I almost had apoplexy, that program alarm and that's 
your radar breaker. 

YOUNG Charlie's about had - Charlie's got nothing 

but a ridge to look at. 

CAPCOM Sounds beautiful, John. Wish I were there. 

DUKE There's a ridge out in front of us to, John. 

Yeah, there's a ridge in front of us, one to the side of us and 
my guess is we're in a subdued old crater that's got a lot more 
crate rs . 

CAPCOM Roger, we Copy. 

DUKE What a neat place! 

DUKE Say, Jim, this ridge in front of us does 

look like a subdued crater and it may be the raised rim about 
50 meters in front of us, about oh - 4 or 5 meters tall. That's 
30 or 40 percent of the surface is covered with boulders that 
are maybe half a meter in size. Out in front of us and to the 
right, where we landed - 

YOUNG Wait a minute, Charlie. 

DUKE We gonna stay, Houston? 

CAPCOM Standby. 



APOLLO 16 MISSION COMMENTARY 1^/20/12 CST 20:24 GET 104 :30 373/2 



CAPCOM Everything's looking okay up to this point, 

John. We'll give you a final word here shortly. 

DUKE Hey, we were coming down pretty good until 

I hit the stop button, and then it fell out. 

YOUNG No, the engine stopped. 

CAPCOM I know exactly what you mean. 

YOUNG It's really nice to have your shadow out 

there, every little bit helps. It's a good altitude to look 
out . 

YOUNG Now, that was super. 

YOUNG Makes us (garbled) batteries all looking 

good, EPS's looking good ascent quantities are looking -- 

DUKE The way these rocks are laid in here out 

my window, I guess they come from South Ray. 

YOUNG There's some bigles out there. We've got 

right out in front of us about 100 meters, at my 10:30 position. I' 
got one that must be 3 meters across. 

CAPCOM Orion, you're stay for T one. 

YOUNG Understand. Okay, stay for T one. 

DUKE P68 John, and I'll get the AGS going. 

YOUNG 4 14 plus 2, then 400 4. 

DUKE Hey, Jim, my hat's off and a case of 

beer to FIDO. I'll tell you that target was just beautiful. 
Boy! you guys just burned us right in there. 

YOUNG That was the superb. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY ^120/12 CST 20:29 GET 104:35 MC-374/1 



go 
42 



ORION 

CAP COM 

ORION 

ORION 

CAPCOM 

ORION 

ORION 
on in there chip, 
plus 16 64, Pro. 



That was superb. 
Ve ry good . 

Where it says we are, I believe it. 
Hey, Jim, our NOUN 4 3s are minus 896 - 
We have them, Charlie, 
plus 15 52. Engine stop reset? 
Engine stop reset. Hey pro, pro P-12 



Okay take time for T- 2 is 
Those numbers are good. 



10 104, plus 



mode 



NOUN 



that 

o f 



not 



ORION 
ORION 
cont rol 
ORION 
ORION 
ORION 
ORION 
ORI ON 
was a 
t r o ub 1 e 
ORION 
ORI ON 
that FS 
CAPCOM 
ORION 
mi dd 1 e of a 
CAPCOM 
ORION 
ORION 
squashed a 
ORION 
left w in dow 
CAP COM 
ORION 
think the Rover 
hill. 

CAP COM 

ORION 
ORION 
a some 



numbers are good. 
Auto, auto, pro, 



okay, PNGCS 
t 



Those 
Yeah. 

33, you got. 6 minutes, we're counting down. 
Boy, this is really a nice place. 
Try that 1/6 G, Charlie. 

My restrain harness has just got me anchored 
Oh, that's what the trouble is. 
Okay, AGS are set, 410, standing by. Man, 
sup. It's about level, we're not going to have a bit 
getting out — 

Yeah, it' 
It sure 

s moo t h , 

Say again, John. 

It's not that FS smooth, we're in the 
field 
Roger . 

There's Crown crater up there. 
It did a little block. We may have 



s going to be neat — 

is not — it's not smooth 



it 



block 



few, 



Jim, we got Crown crater out, John's 



An d , 
about 9:00. 

Ro ge r . 

And just looking at it from here, I don't 
going to have any trouble going up that 



we re 
good 



Glad to hear that. 

I Could be wrong. Slopes tend to fool you. 
It looked good going North Ray, too. There 
big blocks on the rim but (garble) tracks it looked 



It lo ok e d good, 



ORION 
second, Charlie. 

ORION 
is not as long as I 
like we're right on 

ORION 



G amma ray 



Turn on the water for 



Okay, that's a good idea. That shadow 
thought it was going to be. It looks 
top of the ground. 

Yeah, we dldn't--it's not very far. Man 



we got 
Jim. 

CAPCOM 
standing by here 



lot of rocks, that's for sure. How's it looking 



It's still looking good, we're just 



APOLLO 16 MISSION COMMENTARY k]lQlll CSX 20:29 GET 104:35 MC-374/2 

ORION I wish I could tell you what kind of rock-- 

I wish I could tell you what kind of rocks those are, Houston, 
But some of them are very white and dog gone if I can see, I'm 
not close enough to them but and I see one white one with some 
black, can't tell whether that's dirt or not. 



END OF TAPE 



APOLLO 16, MISSION COMMENTARY, 4-20-72, CST 20:34, GET 104:40 375/1 



see, I'm not close 
one with some black 



it, but it could be 



angular too, Joe, 



SC and doggone if I can 

enough to them but - and I see one white 
can't tell whether that's dirt or not on 
a white breccia, (garble) such a thing. 

CAP COM We copy. 

SPEAKER Everyone of them are 

and they're all angular, they're (garble) gray, I believe. 
There's a pretty one over there, without any dust on it at 

all. At about 50 m , by those 3 little craters - 

in fact, Houston, when I told you that I thought this terrain 
might be very spectacular, boy I was just kidding, it really 
is something looking at that mountain. That is a big mountain 
Ch ar li e . 

Yes, we're within 2 minutes, John. I 
is really - 
Thats got to be that big bright stuff. 



you, it 



more 



t ak e 



DUKE 
agree with 
DUKE 
CAP COM 
ORION 
DUKE 
CAP COM 
checklist, I have 

DUKE 
th e re ? 

CAP COM 
in order 
DUKE 
DUKE 

the re s t r ai n t 
YOUNG 
CAP COM 
S C 

CAP COM 
SC 
SC 
CAP COM 
PAO 

down time 1042936 
SC 

CAP COM 

SC 

CAP COM 

copy the changes? 
DUKE 
CAP COM 



Orion, you re stay for T2. 
Right, super. Thank you. Stay for T2 . 
Let's go to Foo, and then ICS PTT. 
Okay, Charlie, when you get the surface 
some changes that we want to take care of. 
Stand by, there probably are a few, aren't 



a few and we'll have a few 
give you maximum stay time, 



is a lot nicer when you 



Yes, there are 
to conserve power to 
I'm ( garlb e) 
That one big G 
h arness off . 
Houston, are we go for DPS vent? 
That's affirmative, go ahead. 
Okay Houston, master arm's on 2 lights 
Roger, 

vents (garble) 
vents far. 



De s cen t 
Descent 
Roger. 
This is 



Apollo Control, unofficial touch- 
ground elapsed time. 
Okay, go ahead. 
Close descent reg 1. 
Descent reg 1 closed. 

Charlie, did you say you were ready to 
Yes sir, go ahead. 

Okay, on 1-2 in the right column there 



about half way down the S-band, pitch and yaw set, you can 
scratch that and the business about peak, in other words 
we're going to stay with the OMNI. Over. 



APOLLO 16, MISSION COMMENTARY, 4-20-71, CST 20:34, GET 104:40 315/2 
DUKE Okay, I copy. 

CAPCOM Okay, the next change is on 1-3 down at 

the bottom of the page on the battery reconfiguration. Instead 
o;: battery 2 off, we vjant battery 3 off reset. Next line 
down, battery L should be CDR instead of LMD and of course 
the talkback should be CDR after that. Next line down should 
be battery 4 off reset. Over. 

DUK.E Okay, we copy all that, BAT 3 off reset, 

BAT loony to commander, talkback commander, BAT 4 off reset. 
Q^Te r . 

CAPCOM Okay, then the next page on circuit breakers 

1-4. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h/lO/H GST 20:39 GET 104:45 MC- 376 /1 



SC 

CAP COM 
b re ak e r s 1-4 
ora Pane 1 11 , 



- re s et . Ove r . 

Okay, then the next page is on circuit 
The first change is on the first row there, 
S-Band antenna. The third one down there from 



the left should be open. And then on the second row, when - 
Mission Timer on the second row should be open. Then drop 
down to the fourth row - LGC DSKY should be open. 

SC Okay, copy. S-Band antenna open, first 

row. Second row, Mission Timer open. Third row - fourth - 
nothing. Fourth row, LGC DSKY open. 



CAP COM 
CAP COM 

SC 

CAP COM 
probably. Okay, on 
verter 2 open. Over 

S C 

verter 2 powering 

CAP COM 
program is to not 

S C 

CAPCOM 
SC 

CAP COM 
the right column 
verter - Instead 

S C 

CAP COM 
the left colu mn . 
be to best OMNI, 
selected right now. 

SC 

S-Band to best OMNI 
CAP COM 



That's correct. 

Okay. Next page, 1-5. 

Is that everything? 

No, I've got one - a couple more, 
1-5 on the fourth 



In- 



row , P anel 16 , 
open. We got In- 



our power-saving 
on the s urf ace . 



Okay . In ve r te r 
the AC ri gh t n ow . 

Okay. Well, part of 
have the AC powered up 
Ok ay . Th at ' s f ine . 
And the next change - 
Somebody's got - 

And the last change is on Page 1-7 on 
there, about 4 lines down, we want In- 
of Inverter 2, we want Inverter Off. Over. 
Okay. We copy Inverter Off. 
And then, the last change is on 1-8 in 
We want Track Mode Off and S-Band should 
which I believe is the one you have 



with 



V o u r 



Okay, we've got Track Mode Off and 
And that's the end of the changes 
are we going to press 

advised that 



on 



up to that point. 

S C Ok ay , Ji m , 

the first rev checklist? 

CAPCOM Yes, go ahead. An d b e 

stars should be good as published. 
SC That sounds pretty good. 

CAPCOM Okay, Orion. I have some more changes 

to that Surface checklist whenever it's convenient for - 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k 1 1^ 1 11 CST 20A4 GET 104:50 MC-377/1 



Okay, Orion, I have some more changes in 



CAP COM 

that surface checklist whenever it's convenient for someone 
t o copy . 

PAO This is Apollo Control and Orion is safely 

on the ground at Descartes. Having landed at 104:29 : 36 ground 
elapsed time. In local time that's 8:23 P.M. time of landing, 
not to far away from the planned landing point. After the crew 
las a chance to power down the lunar module, do some housekeeping 
they will have a sleep period which will begin at about 107 
hours, about 2 hours and 10 minutes from now. With EVA 1 starting 
tomorrow morr.n.g at about 10:30 A.M. central standard time. 
This is Apollo Control at 104:51. 



CAPCOM 
DUKE 
like to . 

CAPCOM 
DUKE 
you to. 

CAP COM 
DUKE 
I really want 
is the better 
CAPCOM 
DUKE 
Looks nice out 

DUKE 
;;he axis plus 
CAPCOM 
them. 
DUKE 
CAPCOM 
CAPCOM 

on the oxide 
DUKE 
CAPCOM 



Fellows to sleep first. 

That suits us. You probably gathered we'd 
So would we. 

Yeah, it's been a hard days night for 



You deserve a good sleep 
Jim, I feel exactly like I 
to get out but I think that this 
part of the valor here. 

Good. Glad you - - glad you 



th o ugh t I would, 
dis cres tion 

think that. 



th e re 



37566 



Man, it s really tempting though, it really 

get ' urn my 04 7 



Okay, Jim, if you did 
0 53 with minus 7366 7. 

Give me those values again Charley, 



on 



I did't 



copy 



vent 



Plus 37566 minus 7 366 7. 
Ro g . I copy . 

Okay. Orion, we're ready to terminate the 



Ok ay . 
Ro ge r . 



Going closed. Ox vent barber pole 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4-20-72 GET 104:56 CST 20:50 MC-378/1 



SPEAKER Jim, would you like to — guys like to take 

one amp worth of power and let me see if I can get this steerable 
going, that landing might have knocked something loose. 

CAPCOM Standby. 

SC Cracked Charlie's fillings, we know that. 

After you fly with Navy pilots for 3 years, you know what the 
feeling is. 

CAPCOM Yes, I know it exactly. I think we'd like 

for you to try to get the steerable up, If you can. 

SC Alright, we'll do that. Okay Jim, it didn't 

work. I was looking at the shadow and the pitch goes around 
nicely. You can watch it move — it oscillates quite a bit be- 
fore itdamps but the yaw, I can't get to move at all, so I 
guess it's belly up. 

CAPCOM Okay, and we assume you got all the necessary 

circuit breakers in AC and DC. 

SC Ro g . I put the AC bus S-band in and I put 

the S-band comm in and the pitch moves fine but the yaw does not 
m o ve . 

CAPCOM Okay. We copy. 

SC I'm going to power it back down. 

CAPCOM Okay and Charlie when you get a 

chance if you're free, I can give you the rest of the changes 
coming up here in the next few hours. 

SC Okay, John is marking on (garble) here and 

go ahe ad , I copy. 

CAPCOM Okay, I don't want you to you know introduce 

any light there that might hurt John but the first change and 
— we're recommending perhaps you want to tear out a blank sheet 
of paper there so you can write down the sequences and the page 
number of these things so you won't be confused. 

SC It just so happens that the back of the data 

card book is blank. Go ahead. 

CAPCOM Okay, sequence number one is on page 1-9 — 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4-20-72 GET 105:01 CST 20:55 MC-379/1 



SC It just so happens the back of the data card 

book is blank. Go ahead. 

CAPCOM Okay, sequence number 1 is on page 1-9 and 

that's configure CAM for stay and that should occur about 105:10 
and if you look at page 1-9, if you have it handy. Over. 

SC Standby. Okay,Igotit. 

CAPCOM Okay, you're aware that you won't have your 

mission timer so we're going to have to keep you on time in here 
At — you see the eat period there on the right column — we want 
to skip that unt-'l you all get your suits off. And we -- the 
next sequence „i number 2 of course, and that's on page 2-1 and 
you can turn to that page and that should occur at about 105:38. 
And we'll keep you on time and at the -- so that's cabin prep for 
EVA, just to get things stowed properly and then at the bottom of 
2-1 go to page 3-4. Over. 

SC Okay, copy 2-1, then finish that page and go 

to the 2 3-4. 

CAPCOM That's right and then of course sequence 3 

is on page 3-4 and that's doff suits. And that doff suit should 
occur at about 10 5:58 and at that point you all 
there where you can eat and we can brief you on 
surface plan. Over. 

SC Rog. That sounds super Jim, 

with that -- those changes and in this briefing, we'd like a word 
about our lunar stay looks like and etcetera. Sure you all can 
get all that? 



be in a position 
the res t of the 

We '11 press on 



sit 



ven t 



CAPCOM 
SS 

down up 
CAPCOM 
Orion . 
SC 

CAP COM 
SC 

CAPCOM 

look real good 
SC 

C AP C OM 
SC 

is in the window and 
good . 

CAP COM 
angles for you for 
SC 

CAPCOM 



Th ey 



Okay, we understand. 

For some reason, it's remarkable but once you 
here the calm just clears up beautifully. 

Very good. Okay, let's terminate the fuel 

Fuel vent's (garble) 
Roger. 

Okay Houston, you want a target? 
Standby. Roger, go ahead and torque Orion 

( garble) 
Ok ay . 

Boy these are really neat optics. The Earth 
looking right at the star, that's really 



m 



0 ve r , 



S C 

CAPCOM 



Orion this is Houston, I have some torquing 
the IMU. 
Roger, go. 

Okay, X is 2 86.25 , Y is all zeroes, Z is 087 

2 86.25 all balls 087. 5 7. 
That's a good read back. 



5 7 . 



APOLLO 16 MISSION COMMENTARY 4-20-72 GET 105:01 CST 20:55 MC-379/2 



S C 

changed quite 



Okay Jim, ray 544 
bit. It's minus now 



is 5 through 546, 544 
.116. 545 is plus 052. 



546 is minus .068. 
they were plus 006 
CAPCOM 

s c 



dump , 



CAPCOM 
S C 

CAP COM 



That was after the CAL . Before the CAL 
and plus 045 minus 088. Over. 
Roger, I have them Charlie. 

And I guess we're ready for the E-MEMORY 

St andby . 

Say when, Houston. 

Okay, we're ready for the E-MEMORY dump. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h/lQ/Tl CST 21:00 GET 105:06 MC380/1 



CAP COM 
S C 

CAPGOM 
SC 

CAP COM 
SC 



S t an d by. 

Say when, Houston. 

Okay. We're ready for the E Memory dump. 

It's on its way . 

Roger. 

And Jim, that AGS on lunar align for 



a couple of minutes there put 
1/2 a degree from the PGNCS. 



me within about less than 



Roger. 
Orion , 
Ro ge r . 
This is 



We copy . 
you're stay for T- 3 . 
Stay for T- 3 . 
Apollo Control. 105 



CAP COM 
CAP COM 
SC 

PAD This is Apollo Control. 105 hours 

6 minutes - 

SC - power down. 

CAPCOM Okay, I copy. 

PAG We ' ve had loss 

Command Module, Casper, as it went 
that frontside pass, the Command Module Pilot Ken Mattingly 
was passed some flight plan updates for the Orbital Science 
Phase on the Mission. Orion, meanwhile, at Descartes land- 
ing site, is going through the post landing checklist, all 
the power-down procedures to conserve electrical power, and 



of signal from the 
behind the Moon. During 



we re still up and 
SC 

Ho us t on ? 

CAP COM 
Houston. Say again. 

SC 

CAP COM 
SC 

CAPCOM 
S C 

That's a sad feeling 



live at 105: 06. 
You really want 

Go ahead, Orion 



to do this, don't you, 
Orion, this is 



It works . 

What was that, John? What worked? 
It goes right into gimbal lock. 
Okay. Good show. 

Yeah, I thought you'd like that, 
just to watch that thing go over. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hJlQ/ll CST 2 105 GET 105:11 MC-381/1 



YOUNG And Jim, the old ED bats are hanging 

in there at 37 each. 

CAPCOM Okay. We copy and I have a T17 to T2 1 

when you're ready to copy. 

YOUNG Go ahead. 

CAPCOM Okay. T17, 106 25 05.65. 11 8, 108 2 3 36.87. 

T19, 110 plus 22 plus 08.13. T20, 112 plus 20 plus 39.04. 
T21, 114 plus 19 plus 10.65. Over. 

YOUNG Okay. T 17 , 10 6 25 plus 05. 65. Then 18 , 108 2 3 

36.87. 19 is 110 22 08.13. 20 is 112 20 39.04 21 is 114 
add 19 minutes 10.65 seconds. 

CAPCOM Good readback. 

DUKE Jim, I have a question for you. I'm on 

page 1-5. My circuit breaker power down. Row 3, it has us 
pushing in the - - leaving the primary S-band in a comm, power 
amp and transmitter receiver closed. We have them open right 
now. What would you prefer? 

CAPCOM Stand by. 

CAPCOM Okay. Charley leave those open. 

DUKE Uh , Roger. And also the S-band antenna is 

open and I'll leave that open. How about the cabin fan control, 
do you guys want that one closed? 

CAPCOM Stand by. 

CAPCOM Orion, go ahead and open that cabin fan 

cont rol . 

DUKE Roger. It's open. 



END OF TAPE 



APOLLO 16, MISSION COKMENTARY, A-20-72, CST 2110, GET 105:16 382 



SC Jim, in my 2 o'clock position about right 

on the rim of that little ridge we described earlier there's 
a fresh little crater that is about 10 meters across and it - 
it's just loaded with little 30 - 40 centimeter ]flocks around 
it. 0 ve r ■ 

CAPCOM Okay, we copy. 

SC Looks like you could see these blocks in 

the walls of that little crater. Looks like the thing is 
going to be pretty blocky in the regolith. 



CAPCOM 
S C 

The surface looks 
to power down the 

CAP COM 

SC 

li o us t on ? 

CAPCOM 
it. Ro ge r , 

SC 



Ro ge r , we copy . 

Houston, it really is bright outside, 
almost white to me. Okay, Jim, we're about 
AC. 

Ro g e r . 

You want these MESA heaters on high. 



ORION , 



Stand by. Stand by, we're thinking about 
keep the MESA heaters on high. 
MESA heaters on high. 
PAO This is Apollo Control at 105 hours 20 

minutes. Here in mission control we've completed a shift 
handover. Flight director, Pete Frank has relieved flight 
director Jerry Griffin. And we will have a change of shift 
press briefing in about 15 minutes. This briefing will be 
held in the main auditorium. Building 1, and that's about 
15 minutes from now. The crew aboard ORION on the 
lunar surface at Descarte at the present time is completing 
their post landing checklist, getting the lunar module con- 
figured so that they can begin a rest period prior to their 
first extravehicular activity. The original flight plan 
called for them to begin EVA Immediately after landing, however, 
because of the landing 3 revolutions late, we're approximately 
6 hours later than planned. The crew suggested and mission 
control concurred that it would be wiser to have them try to 
get some sleep before going out onto the lunar surface. The 
flight planning is progressing an hour at a time, a page at a 
time on the flight plan, and a day at a time. Right now, we're 
planning for the first EVA to be essentially a normal EVA. 
There has been some discussion of possibly curtailing or 
deleting EVA 3, however, no decision has been reached on this 
at the present time. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4-20-72 GET 105:24 CST 21:18 MC-383/1 

Houston, the checklist says put function 
from range to range. It's in all 3 sets. How do you want it? 

CAPCOM I'm not reading you very well. Something you 

did has caused a lot of noise down here. 

We turned the power amp off. (garble) 
CAPCOM Okay ORION, you better turn the power amp 

back on so we can hear you a little better. 

SC How do you read now Jim? 

CAPCOM Loud and clear Charlie. 

SC Okay, we'll leave the power amp on or in 

secondary. Do you want the function switch to range as check- 
list calls -- it's in off-reset now. 

CAPCOM Standby. Okay ORION, you can go to range on 

that. 

PAO This is Apollo Control at 105 hours 28 minutes. 

We're about 22 minutes away from reacquiring the Command Module 
CASPER. The lunar module on the surface is in a stable configura- 
tion, everything looks good at this time. We're presently ready 
to begin the change of shift news briefing in the main auditorium 
at the Manned Spacecraft Center, Building 1. We'll switch to that 
at this time. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/20/72 CDT 22 47 GET 106:5 3 MC-38A/1' 



We had the crew switch to 
separator and got the same 
bit of trouble shooting, 
a blockage in the system 
any indication of water 



but 



PAO This is Apollo Control at 106 hours 53 minutes 

During our change of shift news briefing we've had a pretty steady 
flow of conversation with the crew. Initially, John Young while 
they were going through the post landing checklist getting the 
lunar module figured for their stay. And for the sleep period 
Young reported that they had a - - an 02 sub-light. This is 
a light that would indicate some sort of a problem with the 
water separators and there are two of them on the lunar module. 
Only one of which is required at any time. These remove 
moisture from e atmosphere of the LM cabin by centrifuging 
the moisture o lu of the air. That's a spinning blade type 
device that spins the moisture out. And looking at the data 
we on the ground we able to see the separator had slowed 
down quite a bit. Infact it almost stopped it rotation. The 
initial reaction was that perhaps there had been a slug of 
water In the suit curcuit and this large slug of water had 
simply bogged the separator down, 
the secondary - - or to the second 
indication. After going through a 
it appeared that perhaps there was 
not - - not water. We didn't have 
in the hoses when the crew a - - upended the suit hoses. 
Nothing ran out of them. And by going through a series of 
different configurations, I was determined that the check 
valve - - cabin check valve was apparently not working properly 
and by simply changing the position of this valve which is 

able to get rid of the problem, 
discussed with the crew and also 
problem. And we see no impact to 
this. The LM telling you controller 
to get by with the situation as it 
was and it would cause no problem. Now also we've had quite 
a bit of description of the lunar surface out the window from - 
both Duke and Young. At the present time the crew is preparing 
to begin their first meal on the lunar surface prior to beginning 
the sleep period. We'll play back the accumulated tape that 

about 35 minutes of it. And then get caught 
follow conversations live. 
Jim. Houston. Over. 
( garble) 
Jim . Orion . 
Go ahead, Charley. 

Had a long day here. Could we doff 
the cabin configuration and all? 
Okay. That's fine with us Charley. 



perfectly acceptable we're 
You'll hear this situation 
hear the resolution of the 
the mission as a result of 
said that we would be able 



w e 
up 



h a ve stacked 
and continue 
DUKE 
SPEAKER 
DUKE 
CAP COM 
DUKE 
suits b e f o re 

CAP COM 
ah e ad . 

DUKE 



up 
to 



we do 



th e 
Go 



Oh, Hello there Tony 



APOLLO 16 MISSION COMMENTARY iij2Q/12 CST 2247 GET 1 0 6 : 5 3 M C- 3 8 4 / 2 

CAPCOM Yeah, that's swell. Yeah, good evening 

fellows. Outstanding job. Real nice. 

DUKE Dan, wait till you see the rocks of this 

p 1 a ce . 

CAPCOM I've been listening to you. Sounds great. 

DUKE Tony - - 

CAPCOM It's going to be enough to make geophysicist 

sit up an d c r ow . 

DUKE Laughing. You already done that. 

ORION You've never seen so many rocks, you never, 

you never seen so many rocks Tony. Some biggies too. 

CAPCOM Uh , really sounds fine. I'm getting green 

again. I tell you I wasn't green about 3 hours ago. 

DUKE I'd say you've earned your pay today. All 

those guys that (garble) and figured out all that earned their 
pay today I'll tell you that. 

YOUNG Hey, Tony tell John Covington that this 

thing is a piece of cake compared to his light weight training 
uni t . 

CAPCOM Okay. I'll sure do that. He's running 

around here somewhere. 

"^OUNG You Just see Charley Just picked up his 

130 pound back pack with one hand. Be advised Tony we changed 
our mind on doffing suits since we got some stuff behind the 
ascent we're gonna go through the normal configuration. 
We're doing the cabin configuration for stay now. 

CAPCOM Okay. We carry that 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hJlQ/ll CST 22:52 GET 106:58 MC-385/1 



We copy 
Ho us ton . 



that. 
We ' re 



down to get ting 



ORION - since we got the stuff behind the 

engine - ascent engine, we're going to go through the 
riormal configuration. We're doing the cabin configuration 
for staj' now. 

CAP COM Okay. 
ORION Okay, 
rid of the arm rest. 

ORION By the time we 

full, I don't if we're going to be 
CAP COM Right. I know 

ORION Okay, Tony, my 

dosimeter reads 21109. 
CAPCOM 
ORI ON 
b us ines s , I 



get this junk bag 
able to open the door 
what you me an. 
passive - my personal 



o ar t 



them 



felt 
ORI ON 
CAP COM 
ORI ON 

of (garble) 

CAPCOM 

ORION 



taken 

th ere , 
from 

aire ady 



Okay. 2 1109. 

When I went through that jettison 
like I was throwing away half the cabin. 
Minus 22050, Houston. 
Okay. 2 20 50. 

Okay, Houston, before we do the ETV 
the cap prep we are going to take our suits 

Okay . 

If we'd been smart, we'd have 
off at the first part of this thing. 
CAPCOM Before you get your suits off 

you may want to bring that 500 millimeter forward 
behind the engine cover there. 

ORION Tony, we're ahead of you. We 

did that. And, we got everything out from back here, and 
I'm putting up the ISS now, and we'll be - John's 
getting his stuff off. 

CAPCOM Good show. 

ORION Okay, Tony, we've got three 

here now and John's out of his suit. 

CAPCOM 
around. 

ORI ON 
of lying there 
data here now? 
CAPCOM 
ORI ON 
Ok ay , I re ad you, 
CAPCOM 
ORION 



off 



of us in 



And, I assume, all three are walking 

No, not exactly, one of them is sort 
Tony, are ya' 11 getting the high bit rate 



Yes , 
Okay 
T ony . 
Ve ry 



we do Charlie. 
John should be 



back up here 



good, Don. 
I guess our opinion of this operation 
::ight about here is that the coolant is really marginal 
in the suits, and we'd like to get permission to get a shot 
of cold water through the suit loop, even with the power 
down situation, to keep us from sweating so much. Would 
that be okay? Whenever we're doing something in the 
£;uit work in the cabin. 



APOLLO 16 MISSION COMMENTARY hllQIll CST 22:52 GET 106:58 MC-385 



Okay . 
Ye ah , th ere ' 
Well, thank 
seconds worth then 



We have to talk about that here 



s no problem 
yo u. Just a 
quit. 



with 
shot 



Orion, Houston. 
Go ahead, Tony. 



CAP COM 
CAPCOM 
ORION 
like mayb e 3 0 
CAPCOM 
ORION 
CAPCOM 
like to go to Auto. 
OKI ON 
CAPCOM 
Cabin . 

ORION 
CAPCOM 
ORION 

Sep light. Isn't that because we have 
or something while we're in this mode? 

CAPCOM Copy, John, we're working it. 

CAPCOM Yeah, the suit gas dlverter valve 

chattering and making a sort of a purr. Okay, John, we 
like you to switch water separaters. 



that, John . 
you know. 



Okay . 

Roger. 
Ok ay . 

Ok ay , 
Okay . 
Ok ay , 



On your cabin gas return, we'd 

Auto on the cabin gas return. 
And on the suit gas diverter, to 



it's pushed to Cabin, 



H o us t on , we 



ve got an ECS 
got to go to 



H2 0 
Sep 



1 s 
' d 



ORION 

CAPCOM 

ORION 
light in he re. 

CAPCOM 

ORION 
configuration is 
is in Auto, we're on 
release is in Auto. 



Okay, we're in full to 
Ok ay . 

Okay, we've still got a 



Sep 2 . 
water separate 



Okay , 
We've 



we copy that . 
got the - Let 



me 



tell you what our 
the cab gas return 
primary LiOH cartridge, the suit figure 
We're in (garble) push to cabin, and our 



here. We're in full sep 2, 



hoses are stowed 

CAPCOM 

CAPCOM 
climbing up 
It's j us t a 

ORI ON 

CAPCOM 

ORION 

CAPCOM 
the water in 



against the bulkhead. 
Okay, we copy that. 
Okay, John, Separater 
there. It looks like it will 
bit s 1 ow . 

Ok ay . Fine 
Orion, Houston. 
Speak, Tony. 

Okay, I - They're thinking you 
the hose problem. They'd like you to 



speed is si owly 
make it up alright 



may have 
drain the 



hoses down toward the floor. Maybe 
out of there. They'd also like you 



th e blue hose 
ORI ON 

re ad ? 

CAP COM 
ORI ON 



and make sure you 
Okay, Tony, 



get 
I'm 



5 by, 
Ok ay . 



Ch arlie . 
This ECS 



we can get some of that 
to hold your hand over 
a good flow, 
back up. How do you 



- on - 



END OF TAPE 



APOLLO 16, MISSION COMMENTARY, k-20-12 , CST 22:58, GET 107:04 386/1 



ORION Okay, this EPS on the P LS S to cabin, it 

jsounds like to me that there's a flapper valve or something 
chattering back in there that is sort of - perhaps stagnating 
the flow in the loop. 

ORION Yes, that is what it sounds like to me 



Okay, are you getting flow out of the 

That's affirmative. We're getting it out 
1 the same way that Charlie does, it's got 



1: o o . 

CAP COM 
b 1 ue hose? 

ORION 
of there but T 
something trapped in there. 

CAP COM Okay. 

ORION It's coming out in pulses. Matter of fact, 

]. measured play - I can make it play what it sounds like for 
you. Now what you hear there is the microphone - is the mike 
brought up against the hose and hose blowing against the 
nicrophone. It's not a contant thing, it just sort of chatters 
like some valve in there is not doing its thing. 

Okay, we heard that, John. 
Charlie's is the same way. 

Okay, John, we'd like to go back to egress 
converter and give us a mark when you do it. 
Ok ay , 3 2 1 mark . 

that's egress on the 2 gas converter. 



on 



CAPCOM 
ORION 
CAPCOM 
the 2 gas 
ORION 
ORION 
CAPCOM 
ORION 
CAP COM 
CAP COM 



Ok ay , 
Okay . 
Fl ows 
Ok ay , 
Okay , 



good in 2 gas converter, 
copy . 

we understand all your noise went 



£.w a y , 
PLS S 



ORION 

to Cabin valve 
CAPCOM 
ORI ON 
c f course. 

CAPCOM 
ORI ON 
figured and it 
St owed like it 
than we could. 
CAPCOM 
ORION 
works . 

CAPCOM 
to go back to s ep 1, 
ORION 
CAP COM 
ORION 

on Bag A, Charlie's 



Yes, it doesn't chatter anymore in the 
Okay . 

Okay, the suit separater light is off now. 



Okay. 

Charlie's got the (garble) hundred con- 
it was 
lot harder 



works, which I'm not surprised since 
was expected to hit like a = - hit a 



Okay . 

One of those 30 G bags. I doubt a camera 
Okay, John, at your convenience we'd like 

You got it . 
Okay . 

Okay, Houston, I'm up to frame number 30 
camera and I just finished shooting sort of 



APOLLO 16, MISSION COMMENTARY, 4-20-72. CST 2258, GET 107:04 386/2 



ORION 
th is pi ace is 
CAP COM 
ORION 



a partial pan out the front window. Man 
- its - its - its not anywhere flat around here. 
Very good, John. A 30. 



believe we're going 



It's rolling terrain. I really don't 
to have any trouble at all getting up on 
the side of that hill, although the slope - I don't know - 
the slopes up toward Canyon look like maybe 20 degrees. We'll 
have to take that very carefully 



CAP COM 
ORI ON 
but from there up 
CAPCOM 
ORI ON 
very (garble) 



as 

b lock field 
CAP COM 
ORI ON 
ORION 
to it we'll 
up on t op o f 
CAPCOM 

EVA. 

ORION 
ORION 
ORION 
flat spot to 
terrain with 
CAP COM 



Ro g . What about (garble). 
The (garble) is pretty, is like about 
to Secho and Echo it gets 
How about boulders. 
It is just like - it is 
on Stone - Stone Mountain. 



rather s teep 



10 de g ree s , 
th e re . 



likely described 
We landed in a 



you k n ow . 

Ri gh t . 



be ab 1 e 
it , 



Can you see any up on Stone? 
No , s ure don ' t . 
Yes , mayb e th ere 
to tell better. 



is, when we get closer 
I see some funny shadows 



de p loy 
4 or 5 



Any problems transportability out on the 
I told you - 

It will be a piece of cake, I think. 
Tony, the problem looks like finding a 
the ALSEP. It's just hummocky, rolling, 
me te r ri dge s . 

Yes 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4-20-72 GET 107:09 CST 23:03 MC-387/1 



ORION (garble) Tony, the problem is looks like 

finding a flat spot to deploy the ALSEP. It's just Hummocky 
rolling terrain with 4 or 5 meter ridges 

ORION 



to be on th e s i de 
ORION 

J ohn . 

ORION 
::eet access the 
mayb e 5 p e rcen 
back towards 



Yeah, a hundred meters from here, it's going 
of a hill. 

We can probably put it over the left there 



Tony, I looked out -- down to about 4,000 
North Ray area. There was some large blocks, 
. f the surface up around the rim but if you look 
Palmetto they really petered out in a hurry and I 



- - ^ J ^ -M- ->- J ^ %- ^ %^ \u uui^ -J- LL <a I i u 

think we're going to be in good shape going that way. 
CAPCOM Good show. 

OI^ION One final comment here till I get back to 

work about -- in my one o'clock position about 30 meters out. 

Just beyond the LM shadow about twice as far as the LM shadow 

there is a secondary crater with a large meter size block still 
in it. It looks like if formed the secondary and its got black 



an d 
cin d 



see 



get 



black 



white -- the top 3 percent or 5 percent of the block is 
white and the appearance below that is solid white. Over 
CAPCOM Very good. 

And those black and white blocks you can 

th e p lace . 

Is the crater round or is it oblong. Can you 



o ve r 



ORION 
them all 

CAP COM 
a direction? 

ORION 



Yes, it looks like to me it came from South 
its oblong stoved in towards Palmetto -- just like those ones 
at the cape that they dug out with a bull dozer. 
ORION I guess I have to stick to my earlier guess 

we were about, maybe 200 meters North and 100 meters long 
Double Spot. 

ORION The Northern most crater of it. But we'll 

see as soon as we get out because this is the first place I was 
at on a geology trip that I thought I knew where I was when 



Ray, 
d own 

th at 
p as t 



ti me 



ever 

I started. 

CAPCOM 

ORION 

CAP COM 

ORl ON 
do that at a 

CAPCOM 
if you c o uld 
ALSEP . 

ORION 
is right in front 
don't know what's 
a hundred meters, 
tell whether there 



Oh come on, you always got it. 
After about 2 or 3 hours we always got it. 
Are you through with your cabin prep there? 
Charlie's loading the EPB, can't but one guy 
because it's too crowded over here. 

Okay, the one thing we would like you to see 
decide before you get out is where you would put 

Well, we'll keep looking at it but the trouble 
of us about 50 meters there's a ridge and I 
on the other side of that ridge. Out about 
I can see alot of blocks and -- but I can't 
are craters out there or not because we're at 



APOLLO 16 MISSION COMMENTARY 4-20-72 GET 107:09 CST 23:03 MC-387/2 



ORION zero phase and I just don't think we can 

make a prediction at this point. 

CAPCOM Okay, copy that. 

ORION Those blocks around South Ray are about the 

widest blocks I've ever seen they're around the rim of that 

one . 

CAPCOM Okay, and John about the time we saw that 

separator spin down, we saw a rise in the suit loop pressure, 
we'd like you to confirm that you connected to the suit hoses, 
blue to blue and red to red. The stowage on the wall. 

ORION Now Tony, that's affirmative, blue to blue 

and red to red. Okay it was on the wall. Now they are dis- 
connected. The blues are disconnected at this point. 

CAPCOM Okay, we copy. Just to put your mind at 

rest a little about EVA 1, we're looking at a pertty nominal on 
EVA 1. We'll probably give you some new targets for the UV 
camera, and we can do that real time and we won't have the TV 
when you get out. We'll get it when you get to the crew up 
but otherwise it looks pretty -- pretty nominal right now. 

ORION Roger Tony. Okay Tony, I've got the EVA maps 

out and as I can see gather here, we got 2 -- 



END OF TAPE 



APOLLO 16, MISSION COMMENTARY, 4-20-72, CST 2308, GET 107:1A MC- 388/1 



as 

Is 



CAPCOM (garble) real time, and we won't have the TV when 

you get out, you'll get it when you get to the Cool rocks- 
But otherwise, it looks pretty nominal right now, 

Roger, Tony. 

Okay, Tony, I've got the EVA maps out and 
- gather here, we got 2 maps and 1 return chart, 
you agree with? 

I'll see, wait a second. 
Okay, Charlie, that looks good here. 
Okay, I'm going to leave the optimistically 
traverse maps in the cabin. 
Alright . 

Okay, Tony, the ETB is stowed in my corner. 
Okay, very good. 

And you know in training, I could barely 
It's 1/6, its 1 finger. 

Maybe this tells me we should do more work 



ORION 
ORION 
"- can see 
that what 
CAPCOM 
CAPCOM 
ORION 
leave the walking 
CAPCOM 
ORION 
CAP COM 
ORION 
lift this thing. 

CAPCOM 
on l:he Moon. 

ORION 
you no w , T ony ? 
CAPCOM 
ORION 
he re , we got th e 
and I guess were 
Okay? 

CAP COM 
list change 
It's in the 
ORION 
CAPCOM 
10628. 



Oh 



I'll say. How is the ECS looking to 



Right now it's looking pretty good. 

Okay, Tony, we've done all of your sequence 
suits off and stowed, the cabin configured, 
ready to go to an eat period and bed down. 



a check 



Okay, I ve got a little bit of 
I'd like to read up to you here when you're ready, 
surface checklist. 

Go ahead. 

Okay, this debriefing with Houston will 



be £1 1 



The time now is 10635 , so we're 



real close on 

that. Your eat period is to start at 10643. And then the 
personal 2 and H20 recharge we'll skip. The feed water re- 
charge we'll skip. On to the next page. The pre-sleep at 
10 72 8 and we'll skip the computer work there, that first 
line in the pre-sleep. And the rest period will begin at 
107:53 and number 8, the next step will be at 115:53. That 



wil]. be post sleep, 
the way down on the 
the eat period will 

ORION 
go on page 3 7, 

CAPCOM 
or niy number 8 
three quarters 



post 



Again in that section three quarters of 
page, we'll skip the computer work. And 
be at 116:18. 

Hey, you lost me, Tony. Okay, here we 
sleep. Go ahead. 

Rog. Post sleep on page 37. Step 8 there, 
is at 115:53, that's post sleep. And then 
of the way down that page under post sleep there 
is some computer work, pro verb 37, we'll drop all of that. 
Eat period will begin at 116:18 and the last line on that column 



APOLLO 16, MISSION COMMENTARY, 4-20-72, CST 2308, GET 107:14 MC- 388/2 



CAPCOM is top off trace 02, we'll delete. 

Okay, on the EVA 2 planning with Houston, we'll skip all 



that and then we'll 
don suits at 117:03 

ORION 

CAPCOM 
go to page 2-5. 

ORION 

CAPCOM 
and then from then 

ORION 

CAPCOM 

ORION 



don suits on the next page 3-8. We'll 

Okay, and at the end of that page - 
We copy. 

Okay, and at the end of that page we'll 



EVAl at 117:53 



the time? 



Okay . 

Okay, then we'll prep for 
on we're nominal. 
Okay, at 2-5, what was 
117: 53. 

Okay, copy. Let me go through this now. 

- EVA debriefing with Houston 
the eat period. Turn the page 



Okay, we've doff the PGA's we're 
comes next as step 2. Step 3 is 
Step 4 - go ahead. 

CAPCOM Okay, just to get our steps numbered 

straight here, I guess assigning numbers to these things 
Debriefing with Houston is step 4, eat period is step 5. 
And the times you read are right. And then 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4-20-72 GET 107:19 CST 23:13 MC-389/1 



CAPCOM And I guess assigning numbers to these things 

said debriefing with Houston is step 4. Eat period is step 5 and 
the times you read were right and then the presleep is step 6 and 
the — each number goes on from there. 

ORION Okay, Presleep is 6, then we wake up for post- 

sleep and that's number 7. 

CAPCOM Rog. Rest period is number 7. 

ORION And we get -- oh okay, rest period is 7, I 

see. Okay. And then 8 is post sleep. 

CAPCOM That's affirmative. 

ORION And skipping the computer activity stuff, 

number 9 is the eat period and we delete the top off the PLSS, 
we turn the page, we skip — well we skip EVA 2 planning, we 
turn the page and step don suits is next. 

CAPCOM Right that's number 10. 

ORION And then Step 10. Okay, then we go to 25 

and we're just about back to nominal then. 

CAPCOM Rog. And that's step 11 on 2-5. 

ORION Copy. 

CAPCOM Okay, have a good meal. 

ORION Okay, Tony let's -- let's do the debriefing. 

We don't really I'd like to describe for a LM window description, 

we had so much practice at that, I'd like to see how I could do. 

CAPCOM Aw, have at it, we'll take any words you've 

got. We expended all our questions a few minutes ago with John, 
and in fact I didn't even have to ask any, he just answered them 
all, so but press on. 

ORION Okay, looking out at 12 o'clock on the 

horizon there is a very hilly subdued region, well let's say 
hilly terrain at 12 o'clock. It goes on out of view around to 
11. It's a rolling with white pock marked craters there and I'd 
£; ay that's maybe 50 to 100 meters above the surrounding terrain 
where we are. You move around from 1 to 3 o'clock approaching 
the -- at about 1 o'clock I would say we can see maybe a kilometer 
or so but it might be very deceiving on that distance and we see 
nore rolling terrain similar in Albido, it's a light gray with 
fresh craters being white. As we come on to 3 o'clock 2:30 to 
3 the near ridge that was on our map so that blocks out North 
Ray and Stone Mountain is a correction, Smoky is really there 
and it's about a -- oh a 3 to 4 degree slope and the ridge maybe 
goes up 10 to 15 meters. As we come into the near field at 12 
o'clock it excuse me at about -- in front of the lunar LM maybe 
SO to 100 meters there's this other low ridge that we described 
heyond that we can see a depression or -- and then it rises again 
to another ridge, which is probably -- goes into Spook Crater. 
I think I can see Spook on the horizon at about my 12 o'clock 
position. As we -- that is Boulder covered. The largest boulder 
I see Is perhaps 2 to 3 meters in width and they're angular and 



APOLLO 16 MISSION COMMENTARY 4-20-72 GET 107:19 CST 23:13 MC-389/2 



ORION those are — there are 3 of those boulders 

and one is at 12 and the other 2 are over at about — on that 
second rise away from us at about 1:30 and I'd say those boulders 
are smaller down to 1 meter cover maybe 1 percent of the 
surface. The t raf f i cab 11 i ty out that way looks good as far as 
the boulders go. It's going to be up and down though. As we 
come into 2:30 from 50 to 15 0 meters, I've already described 
that bright fresh crater with the small blocks around it, more 
cobbles really. Beyond that, there are 2 other craters, which 
sort of trend into this depression that runs north south here. 
There's a boulder beyond that at 2:30, which is partially 
buried, it has a good fillet on the south side to the north 
side and to the east side there's no filley at all. As we 
come on into 3 o'clock in the near field I see a good size 
crater perhaps 30 meters to 50 meters at 2 o'clock on the in- 
board side, that's my side of this ridge and we have maybe 10 
percent of the surface covered with blocks, less than half a 
meter. Over. 

CAPCOM Very good Charlie. Where again was this 

boulder with the fillet. 

ORION It's at about 2:30, it may be a couple of 

hundred meters out — 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hll^lll CDT 2319 GET 107:25 MC-390/1 



DUKE You know the surface covered with blocks 

by less than half a meter. Over. 

CAPCOM Very good Charley. Where again was this 

boulder with the fillet, 

DUKE I - - it's about 2:30, maybe a couple 

hundred meters out. And it's on the - - on this side of 
the ridge that trans east west here and it blocks out Smokey. 

CAPCOM Okay. Could it be sliding down the ridge 

and that's why the fillet's on the South. 

DUKE That might be the reason. I was just going 

to say, it's down slope so that might have been what happened. 

CAPCOM I got you. 

DUKE Though the slope doesn't appear that steep 

Tony . 

CAPCOM Okay. How about the buster area, can you 

identify that? 

DUKE Well, that's really - - We sure saw it on 

descent. I don't see ±t right now. There's a bright ray - - 
a bright crater to the right, maybe 50 meters of what I think 
is Spook which is probably Buster. I really wouldn't swear 
to it. 

CAPCOM Okay. Can you tell boulders over there? 

DUKE There's not a one as far as I can see. 

CAPCOM Okay. 

CAPCOM Very good Charley, you're right up to your old 

p e ak . 

DUKE Coming down on - - Okay, coming down Tony 

on descent it looks - - as John has described there's a distinct 
ray pattern across our landing site from south ray and the 
boulders get -affectively disappear by we get to Palmetto. 
And then they don't reappear again till almost the blank of 
north ray. As you can see that depression that trans out 
without a north ray. And you can see the ridge line that I 
think will be an excellent way to climb up to north ray in 
Che rover. And this was all from 5000 feet so I might be a 
little off on that, but at least the general impression was 
good. We could see Doglegs, we could see Cat, all of the 
craters that were on this stop were plainly visible. Hopefully 
they'll be so when we start navigating on the ground. 

CAPCOM Very good. You were mentioning the boulders 

and the rays and South Ray. The ray itself, could you map 
out what extent it was or was it just the whole general area. 

DUKE It was a pretty wide ray coming across here, 

I would say it goes from our position perhaps to Spook. And 
maybe behind us maybe another hundred meters or so, 

CAPCOM Very good. How about left-right extent, 

did it go all the way back to south ray? 



APOLLO 16 MISSION COMMENTARY kJlQ/ll CDT 2319 GET 107:25 MC-390/2 



have to ask John that, I couldn't 
biggest blocks that I saw was 
a hundred meters to 200 meters 
Volkswagen size. 



go 

t ri e d 
to 



DUKE Well, you'll 

see out that way. As we - - the 
when we flew over which is maybe 
behind us. And it looked like a 

CAP COM Very good. 

DUKE John is off comm momentarily, he'll be back 

up in a little bit. And I'm going to start the chow. And Tony 
I wouldn't give you 2 cents for that orange juice as a hair 
tonic. It mats it down completely. 

CAPCOM That might be the point. We'd like to 

your suit gas return back to cabin. Give it a try. 

DUKE Okay. We'll try it in cabin. We also 

this in orbit and we got the same sound Tony. We're going 
cabin now. Mark. Okay, again it's the same sound. 

CAPCOM Okay, we'd like to go back to egress. 

DUKE Hey, Tony. I tell you what it is. I just 

opened the cabin gas return and it stopped it. What is was 
that the cabin gas return check valve is not working right. 
The flow is great now. Our configuration is suit gas diverter 
push cabin and cabin gas return to open and everything sounds 
no rmal. 

CAPCOM Okay. We'd 

DUKE Okay. Have 

what meal you want us to eat? 

CAP COM 

CAP COM 

DUKE I 
CAPCOM I 
first lunar meal 



like to leave you that way, 
you guys got a suggestion of 



your 
I don * t kn ow 



We're working that one. 
Okay . 

got day 5 , meal B , 
guess we'd like you to 
I guess thatdeserves 



just go ahead with 
some champaign 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hJlQ/ll GST 23:24 GET 107:30 MC 391/1 



ORION Okay, I've got Day 5, Meal B. 

CAPCOM I guess we'd like you to just go ahead 

your first lunar meal. I guess that deserves some 
champagne. I don't know, 

ORION Well, like John said earlier, we're 

definitely not going to get scurvy; we've got so much orange 
drink h ere . 





CAPCOM 




Ro ge r . 




ORION 




Okay, Tony, we're going to eat Day 5, 


Me al 


B. 








CAP COM 




Okay, was that Dog? 




ORION 




Bravo as in boy. 




CAP COM 




Rog. 




ORION 




Houston, John finally found his spoon. 




CAPCOM 




Very good. 




ORION 




Hello, Tony. There goes COMM. Tony? 




CAPCOM 




Go ahead. 




ORION 




I can't see how far the (garble). I 


j us t 


ass ume 


that 


this is a blocked field we're in from of South 


jiay . 


It goes about 100 meters out at 10 o'clock and goes 


o ve r 


a ridge 


an d 


disappears. The next time I see it, it's 



at South Ray; which is, you know, pretty far away from here. 

South Ray is a doggone interesting crater. I wish we could 

get to it. The boulders on the west rim of it are just thick 

and white as they can be, and in the middle of it - you know, 

on your map where it looks like it's a depression - there 

appears to be a brown - a sort of a gray patch of dirt or 

Jiomething that was thrown out of that side of it. And then 

on the north there's another ray of very white boulders coming 

out of it. Of course, we could see the ray pattern long be- 

;:ore pitch over. At 22 ,000 I was able to get my nose up 

against the window and see the clue to where we were was 

South Ray. Because at 22 ,000 and at a 60 degree pitch angle, 

we couldn't even see Stone Mountain or any of the things in the 

rear, but you just didn't have any doubt in your mind it was 

that big crater. And the way the pattern went, you work your 

around the pattern. We'll use the same gauges to find out where 

we're going to land that we used on the L&A. The inverted V off 

of Stubby, Cove, Trap, Stubby, Wreck, Trap and works into Cove, 

Hidden Valley and into Spook and from Spook off those small craters 

into Double Spot. Now, I think we ended up landing right 

around one of the smaller craters that sort of form a hook 

off the side - the far side of Spook, going back into Double 

Spot; and I think we're about 50 meters from it at 9 o'clock, 

but - 

CAPCOM How about the albedo? 

ORION I can't - 

CAPCOM How about the albedo? 



APOLLO 16 MISSION COMMENTARY kllQilll CST 23:24 GET 10 7:30 391/2 

ORION Tremendous difference in albedo. The 

North Ray is pure white - South Ray is pure white and it 
blends into a gray, and then over here by us, it's almost 
totally gray. I guess you - I just get the feeling that 
these rocks may have come from somewhere else. There's a 
big subangular rock that I see at 10 o'clock, no at 11 
o'clock at about 100 meters that I would sure like to go 
over and look, because it looks like it's just one big 
piece of whatever rock it is 

CAPCOM Charlie, I was wondering about - - 

ORION Oh, and I do happen to see a white 

glass in the bottom of it. 

CAPCOM I was wondering about the albedo on 

your surface chart. The strips and things, whether the 
lay - whether the rays are as obvious as they are on the 
high sun angle chart that you're carrying or whether they 
look very much different at the low sun angle. 

ORION No they're not, I don't think, I can 

- I can see from here down to Survey Ridge, and - 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4-20-72 GET 107:35 GST 23:29 MC- 392/1 



CAPCOM That much difference at the low spin angle. 

OKION No, they're not I don't think. I can -- I 

can see from here down to Survey ridge and it is Albido on there 
j. s alot lighter. It's a general gradual downslope from our landing 
point to Survey ridge and it looks like it drops maybe a hundred 
iieters and then starts to go right back up Smoky Mountain. I 
guess you could see on a contour map where the low spot is. 
Okay, there are some strange looking craters over there on 
Stone mountain and the Albido contrast is really — really pro- 
nounced in thorn craters. There's some -- it may be a function 
of shadow, we better wait til we get over there. I hesitate to 
say, they almost look like big -- well they must be impact craters. 

CAPCOM Okay, I was just wondering about whether you 

could recognize whether your on a ray by Albido as well as the 
boulder content. 

ORION I think you're going to be able to but boy, 

you're not going to pick up a contact -- it's just going to -- 
it's — you know it fails out into something. 

CAPCOM Outstanding, that's better than (garble) 

ORION We might be able to work across the 

contact. But you mainly would do it by the white boulders in the 
ray I think. I can see on the ridge lines -- from here I can see 
3 different rays out of South Ray, I believe. Have to go down 
l:here and look at it to make sure. They seem to be riding on the 
ridge lines although that's probably deceptive because I can't 
Eiee down in the — I can't see down in the rolls. 

Tony, one other comment from us, distances are pretty deceiving 
here for me. I'm looking out over John's shoulder and it looks 
like to me you could through a rock into South Ray from our present 
position, which is — I know impossible. A second comment has to 
do with the orbital, since we got so much look at the ground 
sailing around waiting to come down. Everywhere that we could 
see — everywhere we saw the ground, which is just about the whole 
sunlit side. In the crater walls and on the ridges you had to — 
we had the same lineation that the Apollo 15 photography showed 
on Hadley, Delta and Hadley Mountains. It was really remarkable 
how in the crater walls primarily, and in the ridges -- it gave 
5'ou the impression that it was a fracture pattern that was all 
trending parallel to the -- concentric around the craters, in 
the craters and on the ridge though they were sort of either 
parallel to the ground or at some dip be what that may. Over. 
CAPCOM Okay, very good. 

ORION And I'm looking out here at Stone Mountain 

and I got a picture of it and it looks like its got — looks like 
somebody has been out there ploughing across the side of it. The 
tienches just look like one sort of terrace after another, right 
up the side. They sort of follow the contour of it right around. 

CAPCOM Any differences in the terraces? 



APOLLO 16 MISSION COMMENTARY 4-20-72 GET 107:35 CST 23:29 MC- 392/2 



No Tony, not that 
could be raised out of 



I can tell from here. 
Stubby or something like 



ORION 
Those terraces 
th at . 

CAPCOM Okay, you mentioned 2 different rock types. 

ORION I can see Stubby has a -- right at the edge 

of Stone, Stubby has got much steeper walls going off of Stone 
Mountain than I originally imagined it. It's — I don't think 
Stone Mountain came up to Stubby and stops. 

CAPCOM Okay, you think Stubby is punched into the 

( garble) 

ORION Well, that's my 

again it's — the thing is so steep 
Mountain right now from a good half 

CAPCOM Okay. Go ahead 

mentioned 2 rock types the black 



guess from here but 
that the whole side 
of it is in shadow. 
Charlie, one thing, 
and white ones and 



then 

of S t one 



you 
th en 



the 



all white ones. Do you see anything else. 



END OF TAPE 



APOLLO 16, MISSION COMMENTARY, 4-20-72 , GST 2 334, GET 107:40 MC- 393/1 



CAP COM 
twc rock types, 
white ones. Do 

ORION 
the LM here, just 
the foot pad that 
either that or an 
we get out . 

CAPCOM 

ORION 



Go ahead Charlie. One thing you mentioned 
the black and white ones, and then the all 
you see anything else? 

Yes, there was one right out in front of 
right down at the - just to the right of 
looks like a breccia to me, Tony. Or - 
indurated regolith. We'll tell you when 



Okay . 

Tony, we'll give you an analogy of what 
that black and white rock looks like. It's really a gray 
and white and looks like a granitic rock with very large 
crystals to it, though I kind of doubt that. 

CAPCOM Outstanding. You're really wetting our 

appetites. 

ORION There are really some interesting rocks 

out here. I see some that are pure snow white and we've 
got the whole - we get the whole run of them. It's hard 
to tell at this sun, with this sunlight, which is so bright 
on the surface just exactly what color these things are, 
even with 
I swear I see one 
better wait until 
s ur e . 

CAPCOM 
ORION 
water, 
CAPCOM 
ORION 
ORION 
a 1 o ok 



the naked eye. You know, it s very deceptive. 

out there with some pink in it, but we'd 
we get out. We'll pick it up and make 



cold 



Tony? 



Roger, I understand. 

What do you call tomato soup made 



with 



t ake 

50 to 100 meters 
0 10 and 9. 

CAPCOM 

ORION 

ORION 

like w e ' re in 
it look s like , 
CAP COM 
ORION 

in te re s ting , 



Aw f ul . 

John says cold tomato soup. 

Hey, Tony, when you get a chance, could you 
at that ridge at 12 o'clock, which you described as 
out and see if that continues on around 



look 
what 



Yes, it does. 

Okay, continues on around to my side. 
John's original observation was that we 

old subdued crater and that's really 



lock 
those 

w ay 

it • ! 



a b ig 
Tony 
Okay 
Man , 
Tony . 



those black and vhite rocks really 



CAPCOM 
ORION 

- it almos t 



I just can t wait to grab one of 
I tell you, Charlie, we feel the same 



In fact, the impression you get is that 
looks like the color of labradorite. 



APOLLO 16, MISSION COMMENTARY, 4-20-72, CST 2 334, GET 107:40 MC393/2 
CAPCOM Oh, Charlie. 

ORION Tony, I guess it's really a bluish cast. 

It's instead a real black to me, but in this sun it looks bluish. 
CAPCOM Right, we understand. 

ORION Well, we'll bring small one of each. I'll 

tell you one thing, I'm glad we brought the rake, because 
we really can do it. 

CAPCOM Very good. 

ORION We can get a rake sample out in front 

of the lunar module in one scoop. 

CAPCOM Okay, and when you get a chance, we'd 

like you to stow those hoses. I guess we don't have enough 
friction in there and the water separators are running wild. 
Okay, and if you can pull yourselves away from the window 
there, we'd like you to hold to the schedule and start pre- 
sleeplng in about 20 minutes. 

ORION How can we start presleep in 20 minutes 

when we haven't even gotten to eat yet, Tony? For goodness 
s ake . 

CAPCOM Okay. Hey, the backroom gave you a bravo 

on your descriptions there. 

ORION I'm like a little kid on Christmas Eve, 

Tony . 

CAPCOM (garble) 

ORION It really is neat to have a gravity field 

around to set stuff on. That is really the cat's meow. HA HA! 

ORION Okay, the hoses are hooked back up, Tony. 

You should see some decrease in the separator. 

CAPCOM Okay. 

CAPCOM I think I know how you feel, Charlie. 

I'm pretty turned on myself. 

ORION Tony, how is CASPER doing? 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/20/72 CDT 2339 GET 107:45 MC-394/1 



DUKE And don myself. 

DUKE Uh , Tony, how is Casper doing? 

CAPCOM Say again Charley. 

DUKE How is Casper doing? 

CAPCOM Uh, everything's fine up there. I just 

look over occasionally. He's been keeping me so occupied here, 
but they've got no problems. 

^UKE Boy, you can't imagine how nice this 1/6 

j^ravity is. This is the first time I've been able to eat soup 
without knowing whether I was going to eat it or take a bath in it 
And Tony, John and I just like to give our thanks to back room 
guys and everybody that worked so hard on Casper's problem 
giving us a chance to get here. 

CAPCOM Rog, Charley, I think everybody around here 

appreciates their job. 

DUKE Gee, I'm sure glad somebody was able to 

come to that conclusion cause it sure look black there for a 
while, didn't it? 

CAPCOM You betcha. 

DUKE I'd like to get sombody to put into words 

that (garble) in the sky and tell us to let's make it a little 
more nominal from here on out. 

CAPCOM I'm all for that. 

DUKE That was to much like a sim. 

CAPCOM Orion. Houston. 

DUKE Go ahead Tony. 

CAPCOM Would you verify that the 02 demand re gs 

are in cabin? 

DUKE It's ve ri fled. 

CAPCOM Okay. We copy that. It looks like the 

pressure was droping down a little bit. And while you're eating 
there I might brief you on a couple of things. At about 108 
hours which is about time you'll be going to bed there, the 
RCS pressure will build up to the front where you'll get an 
RCS light again. And just reset, there's nothing to worry 
about. And then sometime just before you wake up in the 
Korning you may very well get a second caution light and alarm 
when the thrush pressure - - heat and thrust pressure gets 
built back up to 1700. And if you go to helium monitor on 
the temp press gage there that'll go away. There's no way we 
can inhibit that. 

DUKE Okay, Tony. Thank you. 

CAPCOM Okay. 

YOUNG Okay, in other words we're going to wake 

up twice tonight already, uh . 

CAPCOM Yeah, probably. The first one should go 

off before you get to bed though. But that second one will 



APOLLO 16 MISSION COMMENTARY h I IQ 111 CDT 2339 GEJ 107:45 MC-394/2 



probably come on before - - just before 
Okay. How much sleep from the time when 



CAP COM 
you should wake up 
DUKE 

we start to bed do you want us to get? 

CAPCOM 8 hours. You're going to stay in an 8 

hour rest period. 

DUKE Okay, Tony. We're about to fill the drink 

bags and what we're going to do is refill the ones we had 
this morning. Use with just plain water. Over. 



DUKE 

CAPCOM 
to figure out - - 
It's ri gh t th e re , 

DUKE 



Copy that Tony? 

I already copied that, we're just trying 
wonder why you're not using the gator ade ? 
wonder if you - - 

Well, we drank one bag. Okay, we drank 
one bag. The stuff we filled from the command module this 
morning we drank. And that leaves us with two bags for two 
subsequent EVA's. And we could fill one of the other bags 
and just drink water on the 3rd or whatever you want us to 
do . 

Oh, we don't care. Do whatever you want 
is f in e . 

Yeah, we'd rather save the fortified stuff 



CAPCOM 
there . Wate r 

DUKE 
till the last 

CAPCOM 

DUKE 

CAPCOM 

DUKE 
tonight ? 

CAPCOM 

DUKE 



Okay. We understand. 

Okay, Tony. What's our GET right now? 
107: 31. 

Okay. What - - who do you want on biomed 



Okay, Charley 
That's what I 



been looking at me since landing so we 
CAPCOM Okay. 



It's your turn, 
was afraid of. Okay. You've 
'11 just stay right here, 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4-20-72 GET 107:50 CST 23:44 MC-395/1 



ORION We'll just stay right here. 

CAPCOM Okay. Okay, while you^re worrying about that 

your comm configuration for the night will be S-band power 
amplifier secondary at present. The telemetry will be low, voice 



will be down voice backup, range will 
ORION Okay, staring, go 

CAPCOM Okay, it's S-band 

at present, telemetry low, voice will 
off 



an d you 
ORION 
telemetry low 

CAP COM 
Charlie. Try 
ORION 

Ove r . 



re on 



b iome d . 
Thats 
Thank you. 
Okay, 
it again. 

Okay , 



be off and you're on blomed. 
through that again, 
power amplifier secondary 
be down voice backup, range 



down voice backup, biomed lights, 
you're pretty weak there for a second 
down voice backup 123454321 
much b et te r . 



Okay , that' s 
Go ahead. 
Okay, at your 



con ven len ce 



Charlie Houston. 

I have some changes 
ch ecklis t . 



CAPCOM 
ORION 
CAPCOM 

to your emergency liftoff checklist in the surface 
Just give me a call when you're ready to take it. 

ORION Standby. Tony I'm ready to copy, if you'll 

i^lve me a page- 

CAPCOM Okay, it's in the surface checklist 11-1. 

ORION Okay, you speak. 

CAPCOM Okay, on the PGNCS activation -- it's down 

in the bottom left hand side. The last entry there is go and 
hold till standby light off, cross that line out. And add the 
line underneath CB of circuit breaker, panel 11, LGC / DS KY- CLOS E . 

ORION Okay, go ahead. 

CAPCOM Okay, on the second column, they have a 

correction to the checklist, it says circuit breakers 16, -- 
circuit breaker panel 16 and inverter 1 close, that 

should read circuit breaker panel 11 inverter 1 close. Then we'd 
Like to insert — 

Ok ay , got it. 

Okay, and we'd like to insert underneath 
breaker panel 16 inverter 2 close and inverter 



ORION 

CAPCOM 
-hat line, circuit 
s wit ch to 2 . 

ORION 

CAPCOM 



Okay, 
Ri gh t 



in ve r te r 
Okay on 



to 2, cross out Inverter 1 



11-2 underneath on the left 
hand upper side you have asterik CB 11 and 16 underneath that line 
write in P ephemeris update if available for MSFN. 



ORION 
CAPCOM 
ORION 
1706, enter 
CAPCOM 
ORION 



and don 



Okay is that an uplink or do we load? 
S t an db y . 

Okay Tony, John thinks it's plus 25 907 
't load the ephemeris and I think that's 
Roger Charlie, that's correct. 
Okay, go ahead, any other words? 



en te r 
CO rre ct 



APOLLO 16 MISSION COMMENTARY A-20-72 GET 107:50 CST 23:44 MC-395/2 



CAPCOM Right on — I've got on your circuit breaker 

configuration here, I've got some that will be open and you mights 
as well note that they will be open and that's okay, so on 11-3 
panel 11, first line there, S-band antenna will be open. 

ORION Keep going. 

CAPCOM Okay, and on 11-4, 4 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/20/72 CST 23:50 GET 197:57 MC-396/1 



CAPCOM 
will be op en. 

ORION 

CAP COM 
S-Band antenna will 

ORION 

CAPCOM 
the set-up for your 
all that out; and 

ORION 



-3. Panel 11, 1st line, S-Band antenna 



Keep going. 
Ok ay . An d on 
be op en . 
Okay, go ahead. 
Oksy, and we go on to 
steerable antenna and 
that's the end of it. 

Okay. We copy all of those updates 



11-4, 4th line. Panel 16, 

11-6 now. You have 
you can just cross 

The 



only one I don't understand is on 11-1, 
:ion, (garble) - we crossed out the probe 
DSKY closed and right before that it says 

CAPCOM Okay. You're right, 

our part. Just cancel out our addition. 

ORION Okay. No problem. I just thought maybe 

iiomething went by me, there. 



on the PGNCS activa- 
and added an LGC 
LGC DSKY closed. 
That's an error on 



Right. 

Okay, Tony, if that's everything, we're 

to bed. 

Good show . 

Okay, we're through with everything 
here, and we're all set to let you go to bed. You're going 
to bed, I'll have you know, a whole 5 minutes early. I guess 
the government can allow you to have that time off. 

ORION Okay. I'll be on comm, John will be 



CAPCOM 
ORION 
ready to go 
CAP C OM 
CAPCOM 



off 



to turn 



off the lights now. 
you tomorrow, and 



we re 



comm, and we re going 
CAPCOM Okay. We'll see 

sure looking forward to it. 

ORION Hey, so are we. Guess what. You turn 

all the lights off and it doesn't get dark. It's daylight 
outside. Hey, Tony, one final word. Our ECS configuration 
for sleep is push cabin, cabin gas return in Auto, and the 
rest of the thing is advertised. Over. Correction - cabin 
gas return open. 



CAP COM 

ORION 
for the great job 
seems to be pretty 



Okay, that looks good here. 

Okay, Tony, we'd like to thank everybody 
of regrouping, and getting back to what 
nominal from now on; and we'll see you in 



give us 



the morning. I guess you can 
the squawk box here. Over. 

CAPCOM Okay, I'll sure 

and I'll whistle something here. 

ORION All right. Good night 

CAPCOM Good night. 

ORION Houston, Orion. 

CAPCOM Go ahead, Charlie. 



reveille call over 



do that. I'll come in 



APOLLO 16 MISSION COMMENTARY h/lQ/ll CST 23:50 GET 197:57 MC-396/2 



ORION Well, I guess I can't scop talking. One 

final observation, Tony, is that due to the lack of dust that 
we had on landing and the fact that we can see blocks embedded 
in the side of these craters, here, 1 kind of got the distinct 
impression that the regolith is not too thick around here, and 
we ought to maybe think about where would be the thickest 
place to - in order to get the drill in. Over. 

CAPCOM Okay. That's a good observation. From 

the films you've seen of other descents, do you think the 
dust was less than any of the others? 

ORION Well, John will have to really comment 

on that, but as far as my side goes, the little I looked out 
there was by far - we could see - or, I could, on my side, 
see right on down through it - the dust film. 

CAPCOM Okay, and from your - listening to your 

descent, it sounded like you picked it up about 90 feet. 

ORION It was a little bit less than that. It 

was about 80, maybe 75. 

CAPCOM I have a feeling you and I could just 

sit up all night and talk about this. 

ORION Well, that's all you're going to hear 

from me. Good night. 

CAPCOM (laugh) Okay, good night. 

PAO This is Apollo Control at 10 7 hours and 

59 minutes, and at this point, we have caught up with all 
of the back-log of tapes that was accumulated during the 
change-of-shif t press briefing and which continued to pile 
up on us as we were replaying the tapes that we had already 
accumulated. We are up to date now and standing by live, and 
we believe that third good night, or at least hope that third 
good night, was the final one. We don't expect to hear from 
the crew now for about 8 hours aboard Orion. We are in 
contact with Ken Mattingly aboard the orbiting Command 
Module - Command Service Module, Casper; and we'll be pick- 
ing that up and standing by until Ken Mattingly completes 
this revolution and goes behind the Moon, and we expect 
he also before much longer will be getting a rest period. 
Based on the data received from the Lunar Module Guidance 
6i Navigation System during the landing, we have come up 
with a set of landing coordinates which agree very closely 
with the estimation that John Young gave of the Spacecraft's 
position. Our coordinates from the calculations here on 
the ground show the Lunar Module Orion to be located about 
430 feet west and about 900 feet north of the planned tar- 
get point. If I remember correctly, Young estimated that 
they had come down about 200 meters west and about 100 
meters north of a crater very near the landing site, and 



APOLLO 16 MISSION COMMENTARY hll^lll CST 23:50 GET 107:57 MC-396/3 



that crater was Double Spot Crater, which is just slightly 
to the south and west of the LM site. So the two numbers 
would be very comparable. The numbers that I gave, the 430 
feet west and 900 feet north are with respect of the landing 
site - the numbers that Young used. His estimate was 200 
feet - or 200 meters, rather - west of Double Spot Crater and 
100 meters north, which is about the same location, as best 
we can tell, as that we have computed. The coordinates of 
this landing point would be 8 degrees 59 minutes and 13.2 
seconds south and 15 degrees 30 minutes 48,6 seconds east. 
We do expect that these coordinates will be updated, par- 
ticularly if Ken Mattingly is able to get some tracking data 
from orbit. Using the GSM sextant, he plans to try to take 
some landmark sightings on the landing site and will also get 
an additional fix based on crew observations once they get 
out and get a chance to look in a little more detail at the 
surrounding landscape. At this point, we'll switch over to 
our second air-to-ground line and stand by for any conversa- 
tion with Ken Mattingly aboard the orbiting Command Module, 
Casper. 



END OF TAPE 



APOLLO 16, MISSION COMMENTARY, 4-21-72, CST 2A:00, GET 108:06 MC397/1 



CASPER 
ORION 
CASPER 
Okay, that should 
PAG 



Yes, here comes our old friend, Langrenus 
Okay, Ken, we need barber pole plus 4. 



don ' t you ? 



You need a little barber pole, 
be 1 plus what we have. 

Astronaut Stu Roosa is serving as spacecraft 
communicator for the command module. Our spacecraft communicator 
for the LM is Astronaut Don Peterson. 

CASPER Hey, Stu, if I put 30 frames on this 



Crozier I won't get that first strip of (garble) 



away 
le s s 



think about doing 
the pictures with 
this one mag. 

ROOSO Okay, 
that. Ken. 

CASPER Okay, 
start , 

ROOSA Okay. 
ROOSA Okay, 
in te r f el ome t e r and try 



You 

with the inte rvelomete r and taking 
overlap and try to squeeze it all onto 



the 
mag 



CASPER 
up . Come up on 

ROOSA 

CASPER 
I got 165 and the 
strip of Crozier. 

ROOSA 

CASPER 
N o vemb e r . 

BOOSA 

CASPER 
out here real fast 

CASPER 
try to pick up 

ROOS A 



Okay , 
Crozier. 
Ok ay . 

Well> it looks 
magazines empty. 



stand by. Let's take a look at 
I got a couple minutes before I 



Ken, you can go ahead and disregard 
to get them both on that same 

thank you very much. I'm all set 



like I ran 
an d I just 



out anyhow, 
finished the 



Okay, I copy that, 
(garble) magazine. 



November - 



Ok ay . 

An d I'll 



go see if I can get Papa Papa 



Okay, Papa Papa is out and loaded- 
Descartes to (garble) with him. 
Rog. 



I'll 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY l^llljll CDT 00:15 GET 108:21 MC- 398/1 



(Mus i c) 

PAO This is Apollo Control at 108 hours 21 minutes 

Ue have heard no - - nothing further from the crew aboard the 
lunar module Orion, Charlie Duke and John Young since we last 
Si ai d good night. But we do have about 40 minutes of acquisition 
::lme left with the command module, Casper which is presently 
in an orbit 66.8 nautical miles by 53 nautical miles. And 
occass ionally we are etting bits and pieces drifting through the 
communications of what sounds like Marshall music that 
Ken Mattingly is playing on the onboard tape recorder. And as 
the level reaches the high enough point that is triggering his 
vox, the voice operated relay and the communication system 
and we'll get a snatch of it here and there. Mattingly at the 
present time is getting caught up on his normal flight plans 
and we expect he will be caught up by about 109 hours 30 minutes 
at which time he's scheduled to begin an 8 and half hour rest 
period. At present time he's involved in keeping the SIM bay 
operating and taking a series of photographs. And at about 
109 hours 17 minutes he is scheduled to start in on the p re - 
sleep checklist. We'll continue to stand by live for conversation 
between Ken Mattingly and CAPCOM, Stu Roosa. We'll be in a 
record mode for any conversations with the lunar module and we'll 
play those back following their receipt. Should we hear anything 
from Young or Duke aboard the lunar module - - 

(Mus i c) 

MATTINGLY And another strange sight over here, I think 

it's Annbell, it's where it's suppose to be ending the strip. 
But there's another crater here that looks like it's flooded, 
except this same flooded material seems to run up on the outside. 
You can see a definite patch of this stuff that's run down in- 
side an old crater. And that material at least lays on top of it, 
but it lays on top of things that are outside and higher. It's a 
very strange operation. I guess we'll have to wait and let 
someone that knows what they're talking about look at the pictures. 

CAPCOM Al right. Ken. Sounds real Interesting. 

MATTINGLY Man, this place in unbelievable. It's really 

something. Everywhere you turn, it's something new. And let's 
see if we can get in the old SS on Ptolemieus here. 

MATTINGLY Well I'll tell you what. I' m going to have 

to skip Ptolemieus. The terminator is still on the rim. 

CAPCOM Okay. 

MATTINGLY Just for kicks though, I'm going to show you 

one on frame SS, that is really facinating. And I'm just 
under the eastern rim of Ptolemieus. I just mentioned last time, 
I'm going to take a little strip of these. Man, that ought to 
be good enough. Okay, I took it up to 20 frames and I used 
about five of these on SS. And what I took it of was this 



APOLLO 16 MISSION COMMENTARY hjll/ll CDT 00:15 GET 108:21 MC-398/2 



MATTINGLY material that's on the eastern rim of Ptolemieus 

It has the same textural appearance in the - - that we saw in 
the Descartes formation. That being the stuff coming from the 
crater Descartes running north yesterday. An entirely different 
appearance than the rest of the terrain in the low sun. I think 
there may be some interesting comparison there. 

CAPCOM Okay. Ken. Got that. And you're approaching 

30 s e con ds to - - 

MATTINGLY Okay, going to end up pan camera off here 

s omewhe re . 

CAPCOM Rog. You are by my mark, you'll be 

25 seconds. Mark. And, Ken just turn the cameras off there 
then before you continue on with those steps. I want to say 
something about those procedures on down at the bottom. I'm 
showing 7 seconds. 

MATTINGLY Okay. 

CAPCOM And Mark. I 

and mapping camera. 

MATTINGLY Okay. There - 



show T stop. That's the pan camera 



Stand by 
image motion off. 



An d off. 
Hey, thank 



I '11 

you 



wait 30 



seconds before I take the 
Stu, that was a big help. 

CAPCOM Rog. And - - we're going to delete on those 

procedures there, the mapping camera retract, and the mapping 
camera laser altimeter cover closed. We're going to leave 
those out all night and we'll have a plan tomorrow on how 



we re going to 

MATTINGLY 
c or re c t ? 

CAP COM 

MATTINGLY 
going to stand by 

CAP COM 

CAPCOM 
going to let 
that as i s , 

MATTINGLY 
work too today 

CAPCOM 



handle the mapping camera. 

Okay. You do want the laser 



off 



Is that 



That's affirmative. 
Okay, the laser is off now. 
and the image motion is coming 
Jolly good. 

And Ken, a couple of other items 



Mapping camera 
off . 



We ' re 

the Bat A charge all night, so we'll just leave 

Okay. Those batteries kinda put in a day's 
Rog. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4-21-27 GET 108:30 CST 00:25 MC- 399/1 

ORIOtt Okay, I see that we're going to have AOS 

on the next pass before we get -- before the sleep period starts, 
£:o I think I'll wait and give you my film summary at AOS, if that's 
okay. It'll take me that long to sort it all out I'm afraid. 

CAPCOM That's okay Ken. 

CASPER All I was planning to give you was how much 

was left in each mag. 

CAPSOM Say again Ken. 

CASPER All I was planning to give you was how much 

is left in each magazine. 

CAPCOM Hey, that's jolly. 

CAPCOM And CASPER Houston. 

CASPER Okay. 

CAPCOM Okay 1 got a couple of things. Ken one is 

we would like to delete that film status report. We would like 
for you to start your rest period just as soon as you can after 
LOS and let us pick up any talking about the film or anything like 
that for tomorrow. 

CASPER Oh, very well. (garble) 

CAPCOM And another thing, we're noticing indications 

here that your screens here on your 02 return hoses and also the 
suit circuit return valve. You might take a look at those 
tonight and see if they need a little cleaning. 

CASPER Okay, I've been cleaning the suit circuit 

return screen every night and its been getting pretty dirty so 
I'll check it again tonight and the other hoses, I've got a -- 
except I didn't have a screen for the inlets. I capped the inlets 
and just used the outlets to keep stuff from -- we got so much 
junk here I didn't want to get stuff inside the hoses down through 
the suit fans and to clog up the other filters. 

CAPCOM Okay. 

CASPER I'll put the interconnects on the inlets and 

just let the air blow out of the hoses and take it all in through 
the suit circuit return. That might give you a little higher 
press uri z e . 

CAPCOM Okay, we concurr with the configuration and 

but we have noticed the 02 flow creeping up slowly, indicating 
that it would probably need a little h o us e c le an i n g on that screen. 

CASPER Yes sir, thank you very much. I'll catch 

that b aby . 

CAPCOM Okay. 

CASPER I'll tell you this is -- a man shouldn't get 

paid for doing this. 

CAPCOM Yes, it really sounds great Ken, I think the 

difference in the Earth crawcent sure must made a difference, the 
way you're talking of earthshine versus the way I thought. 

CASPER Oh, it's fantastic. You can see the whole 

thing. It's really something. I'm going to try that — that's 



APOLLO 16 MISSION COMMENTARY 4-20-72 GET 108:30 CST 00:25 MC- 399/2 



CASPER the reason I wanted to try and get these 

earthshine pictures in this time before the Earth gets any smaller. 
Because it really isn't nearly as dramatic tonight as it was 
last night and I don't know whether thats the altitude or what, 
but if I (garble) run these booms out and what else. Got to turn 
the pan camera off. Okay, if you'll give me a call on those. 

CAPCOM Rog. I'm watching for you on the boom deploy 

Ken. You got a little less than 5 minutes. 

CASPER Okay, you know something else that I'm not 

real sure about. It sure looks to me as though the Earthshine 
is not as bright on this mare. I guess it's just this mare that's 
over around Fra mauro and so forth is just darker and maybe it's 
my night adaptation that hasn't taken affect yet, but I got the 
distinct impression that (garble) it's alot brighter when you 
get over to the western LM. 

CAPCOM Okay, got that Ken. 

CASPER I don't think I understand that. I tell you, 

I thought this was kind of appropriate here a few minutes ago I 
was playing Berillios symphony fantastique and looking at this 
fantastic sight and floating along here. It's just unbelievable, 
it's so much fun . 

CAPCOM Yes, it sure sounds like it, in fact we were 

catching a little of your music occasionally there. Didn't 
sound as good as Ride no paint but I guess it'll do. 

CASPER (garble) Well, I've been listening to old 

paint kind of music for 3 days of PTC but it was good old paint, 
I'll have to admit. I enjoyed it. 

CAPCOM And CASPER Houston. 

CASPER Go ahead. 

CAPCOM Okay, what we'd like to do now Ken is go 

ahead and put out the booms now and as soon as you have them out 
go ahead and start the — start your P20 running right now. It 
looks like we might be cramped a little bit to get your uplinks 
in and we want to make sure that we get — all of the uplinks 
completed here. 

CASPER Okay, in other words you want me to cancel 

the Earthshine. 

CAPCOM Yes, that's what we are saying Ken. We're 

just afraid we might be cutting it kind of tight on the uplink. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4-21-72 GET 108:39 CST 00:33 MC-400/1 



CAPCOM I — that's what we are saying Ken, just 

afraid we might be cutting It kind of tight on the uplink. 



CASPER 

CAP COM 

CAPCOM 
to off. The lens 

CASPER 

CAP COM 

CASPER 
and put the booms 

CAPCOM 
as you complete 



that ' s in wo rk 



and we can take the pan 
camera power is off. 



camera power 



P20 



re 



Alright , 
Okay . 
Okay Ken 
is St owed . 
Ok ay . P an 
Ok ay . 

Okay, and I guess I might as well go ahead 
out h adn ' t I . 

Rog. We'd like to have 
that, let's go ahead and do 
showing at 108 plus 50. Let' 
Okay, I'm already going 
Oh okay . 



those out 
the — go 



s don ' 
th ere . 



m 



s pm 



that we 
CASPER 
CAP COM 
CASPER 
it around. 

CAPCOM Okay, very good. 

CASPER And I guess I'd like to 

figuration but what you think 1 should have 
while you're ready to go to bed, 
status and let me cross check it 
something . 

CAPCOM Okay. We'll get that for you 

CASPER Holy Smokes. 



and as soon 
into the 
t wait for that 



doing a manual roll to get over there and 



have a SIM Bay con- 
at the end of 
what mechanical and electrical 
to make sure I haven't forgotten 



END OF TAPE 



APOLLO 16, MISSION COMMENTARY, 4-21-72, CST 00:39, GET 108:45 MC 401/1 



CAPCOM And Casper, Houston, we've got 

bay configuration when you're ready. 

CASPER Okay, go ahead. 

CAPCOM Okay, it is your normal 

with a change in the first digit of the top 
to change that 0 to a 1. You will now have 



that SIM 



minus 11111, 
CASPER 
CAPCOM 
CASPER 

ri gh t they ' re 
CAPCOM 



sleep configuration, 
line . We going 
a configuration 



Second line is normal 01222. 

Okay, minus on 1 01222. 
Ro g . and we'd like 

And follow the inlet screens and your 
- go ahead. 

Okay, I copied your 
BD roll for sleep tonight 
CASPER Okay, you'd like to 

does the general RCS picture look? 
CAPCOM We're in good shape. Ken, we're down 

little on the flight plan, but we're riding 168 above the 



an d we'd like 



How 



Thank you sir. 



bit on the screens 
do a BD roll. 



Ok ay 



on the flight plan we're down 
Okay . 
An d , 

(garble) afternoon. 

It'll all get done. You're 



re d line . We ' re - 

CASPER 

CAPCOM 

CASPER 

CAP COM 
job, Ken . 

CASPER 
this afternoon. I 
decided that if it 
to tak e it. 

CAPCOM Yes, well I tell you, the traces 

up to the time that you turned off the gimbal motors 
a classic divergent curve, right out of the textbook 

Yes. Yes, I couldn't believe it 
I was back in floody simulator. 
Yes, I think there has been a 
suit today. Wish we could just 



a minus 133. 



doing a great 



Well, I'm just real sorry about the delay 
wish I had known more about it. I'd already 
was just oscillatory and stable I was going 



on those 
w e re j us t 

when 



lot of p eople 
forget this 



CASPER 
I saw that thing. 

CAPCOM 
talking about SIM 
one . 

CAPCOM But, hey, I got 

here while we're chatting, I'd like 
presleep checklist that we'll not bump 

CASPER Okay, thank you. 

CAPCOM And, Ken a couple other - or one other 

item here, you might get a leg up on your presleep checklist 
and check the optics power off at your convenience. 



a couple other reminders 
to remind you on your 

up the cabin tonight. 



CASPER 
min ute . 

CAPCOM 
just wan ting 

CASPER 
n i gh t , 



t o 



Okay, I'll get that stuff in just a 

Okay, I wasn't trying to hurry you, I 
toss in a little reminder there. 

Yes, thank you, I think left it on last 



APOLLO 16, MISSION COMMENTARY, 4-21-72, CST 00:39, GET 108:45 MC401/2 

CAPCOM That isn't what I was trying to say. Ken. 

CASPER Laughter- Well, you know what was going 

on Last night and this morning. Everything you said was true. 
I got a garbage can in here that's bigger than me. 

CAPCOM Rog. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k IHIll CDT 00:A5 GET 108:51 MC-402/1 



CAPCOM And we'd like to have OMNI Charley now. Ken 

and when get the attitude you can reacquire with high gain. 
CASPER Okay. Yeah, that is better. (Music) 

CASPER Hey Stu, I kinda turned the tank off this 

morning when you tried to give us a SIM bay status report. I 
think this morning wasn't a convenient time. But, I'd be very 
happy to hear one of those tomorrow to see what we're finding 
out . 

CAPCOM Okay. We'll give you a good one tomorrow. 

CAPCOM Okay, Ken. Just at this appearance it 

appears that everything is swinging along alright with them 
but we'll have a good scientific readout on it tomorrow. 

CASPER Alrlghty. 

CASPER Hank said something about a - - about the 

clock update. Are we going to do that tomorrow or tonight? 

CAPCOM That'll be done tomorrow Ken. What we'd 

really like for you to do is get to resting. Go into your 
sleep period just as soon as you can here. 

CASPER Rog> I'm working on the pre-sleep checklist 

n ow . 

CAPCOM Okay. 

CAPCOM Casper, Houston. Would you give us the 

high gain just as soon as you can and go ACCEPT. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kllllll CST 00:54 GET 108:59 MC 403/1 

CAPCOM Casper, Houston. Would you give us a 

High Gain just as soon as you can and go ACCEPT? 

CAPCOM Okay, Casper, If you'd give us wide-beam 

width and ACCEPT, please - we're about a minute and a half 
from LOS. 

CASPER Okay, you've got ACCEPT. You want wide 

in Auto or what (garble)? 

CAPCOM Rog. That's wide in Auto, Ken. 

CAPCOM Okay. Ken, If you can read, we'd like 

for you to go br.CLk to Block and load your jett monitor routine 
manually . 

PAG This is Apollo Control at 109 hours 2 

minutes. We've had loss of radio contact now with Apollo 16 
Casper, as the Spacecraft went around the corner on its 
e ighteenth revolution. And when we reacquire in about 
45 minutes. Ken Mattingly should either be in his sleep 
period or about to begin. We last heard from the crew 
aboard Orion on the lunar surface at 107 hours 53 minutes, 
or a little over an hour ago, and they should be in the midst 
of an eight-hour sleep period at this time. We have an ad- 
ditional update to the landing coordinates for Orion based 
on the crew's o ut- th e-window observations and report of the 
terrain features that they were able to see out the window. 
Our best estimate now is that their actual landing site - 
-Landing point - is 656 feet west of the target point and 
459 feet north. At 109 hours 3 minutes, this is Apollo 
Control Houston. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4-21-72 GET 109:46 CSX 1:40 MC-404/1 



PAO This is Apollo Control Houston at 109 hours 

47 minutes into the mission. We have just acquired data on 
CASPER, now on its 19th revolution around the moon, meanwhile 
in the Mission Control Center, we have had a shift handover. 
Flight Director Gene Kranz and his white team of flight controllers 
now manning the console here in Mission Control. We will leave 

the line up on this front side pass of CASPER and at 109 hours 

48 minutes continuing to monitor, this is Apollo Control Houston. 



CAP COM 
CASPER 
CAP COM 
Houston, how do you 
CASPER 
CAP COM 
CASPER 
CAPCOM 
CASPER 



Go ahead CASPER 
Houston CASPER 
Go ahead CASPER 
read now. 
Loud and 
Okay . 

Okay, I'm ready 



This is Houston, 



CASPER 



clear, Don. 



to give you accept. 
Okay, go accept, we're ready to uplink. 
Okay, standing by. And I'd like to verify 
the cryo configuration with you and make sure that I'm leaving 
battery A on charge over night. There's no lithium canister 
change tonight and looks like when you get the uplink in and I 
give you VERB 74, we'll be through. 

CAPCOM I believe that's right. Standby one. 

CASPER Houston, we concur with battery A, we'll stay on charge 
all night. There's no LIOH change and on the cryo configuration, 
the 02 and H2 tanks 1 and 2 AUTO, tanks 3 off. 

CASPER Okay, that's just what we have. 

CAPCOM Rog. 

PAO This is Apollo Control Houston, 

53 minutes ground elapsed time. Our CAPCOM here in 
is Astronaut Don Peterson. Meanwhile, Phil Shaffer 
the team of flight controllers who are working with 



109 hours 
Mission Control 
is heading up 
CASPER. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k HUll CDT 1:48 GET 109:54 MC-403/1 



CAPCOM 
in for tonight. 

CASPER 

CAPCOM 

CAPCOM 
and that winds it up. 



CASPER 
guess that's it. 
CAPCOM 
CASPER 

this . 

CAP COM 

CASPER 
like this . 

CAPCOM 

CASPER 
ni gh t . 

CAPCOM 

P AO 



Casper, Houston. We need an E mod and turn 

Okay. She's coming at you bit by bit. 
Ro g e r . 

Okay. Casper, we recommend you go BD roll 



Yeah, thank you very much. Okay, Don I 
I'll see you folks tomorrow. 

Okay, Casper. Pleasant dreams. 

You must know somebody to get a shift like 

Say again Casper. 

You must know someboy to end up with a shift 



Ah, I'm afraid you're right. 
Well, have lots of coffee anyhow. 



Good 



Good night. 

This is Apollo Control Houston at 110 hours 



1 minute ground elapsed time. That - - 



END OF TAPE 



APOLLO 16, MISSION COMMENTARY, 4-21-72, CST 1:55, GET 110:01 MC406/1 



PAO This is Apollo" Cont rol Houston at 110 

hours 1 minutes ground elapsed time. That was Don Peterson 
and Ken Mattingly conversing there. Command module pilot, 
Mattingly got his turn in call for the night. However, we 
will continue to keep the lines up live in the event we 
should hear any further conversations with Ken Mattingly 
aboard the command module, CASPER. We're at 110 hours 2 
minutes ground elapsed time, this is Apollo Control Houston. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k Jlljll GST 1:56 GET 110:02 MC 



PAO This is Apollo Control Houston at 110 

hours 21 minutes ground elapsed time. The Flight Surgeon 

here in Mission Control just reported over the Flight 

Director's loop that Ken Mattingly, aboard the Casper Space- 
craft, has just dropped off to sleep. We're at 110 hours 

22 minutes into the Mission and continuing to monitor. This 
is Apollo Control Houston. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4-21-72 GET 110:23 GST 2:16 MC-4G8/1 

PAO This is Apollo Control Houston at 110 hours 

58 minutes into the mission. We've had a loss of signal with 
the spacecraft CASPER as CASPER is passing now around the back 
side of the Moon on its 19th revolution. As we reported earlier, 
Command Module pilot Ken Mattingly appears to be sleeping, dozing 
off to sleep shortly after he was given the go ahead to start his 
rest period. Meanwhile in the Mission Control Center, the flight 
control team is studying the various options for the lunar surface 
activity ahead and the lunar orbit operations and we would ex- 
pect at least a first cut on a flight plan update before the end 
of this shift. We now show 4 hours and 54 minutes of time 
remaining before the crew aboard ORION, before John Young and 
Charles Duke get there wake up call. We're at 110 hours 59 minutes 
into the flight and this is Apollo Control Houston. 



END OF TAPE 



APOLLO 16, MISSION COMMENTARY, 4-21-72, GST 2:57 GET 111:04 MC 409/1 



PAO This is Apollo Control Houston at 111 

hours 4 minutes into the mission as the spacecraft CASPER 
passes above the back side of the Moon on its 19 revolution. 
We read it's orbital parameters at 67 nautical miles by 53 
nautical miles. We're at 111 hours 5 minutes ground elapsed 
time and this is Apollo Control Houston. 



END OF TAPE 



OLLO 16 MISSION COMMENTARY kHUll CST 3:39 GET 111:A5 MC 410/1 



PAO This is Apollo Control Houston at 111 

hours 46 minutes into the Mission of Apollo 16. We are now 
acquiring data on the Spacecraft Casper as it comes around 
the front side of the Moon on its 20th revolution. We pres- 
ently show an orbit for the Command Module Casper of 67 
nautical miles by 53 nautical miles. Command Module Pilot 
Ken Mattingly, like the two Lunar Module Pilots, is in his 
rest period. We'll stand by, however, and continue to 
monitor, in the event any conversation should take place. 
We now show John Young and Charles Duke having 4 hours and 
6 minutes of time remaining before their wake-up call. 
We're at 111 hours 47 minutes, continuing to monitor, and 
this is Apollo Control Houston. 



END OF TAPE 



APOLLO 16, MISSION COMMENTARY, A-21-72, GST 3:42, GET 111:48 MC411/1 



at 112 
up a short 
lunar module 
Don Peterson. We'll play that conversation 



ORION. Over, 
go ahead. 



PAO This is Apollo Control Houston 

hours 42 minutes into the mission. We just picked 
c on^'e rs a ti on between Charlie Duke aboard the 
ORION, and CAPCOM 
for you now . 

ORION 

PETERSON 

ORION 

(garble) (garble) 10 
guys e xpe c te d ? 

ORION 
back, to sleep. 

PETERSON 
we want you to open 

PETERSON 
row 3 under heaters 

ORION 

PAO 



Hello, Houston, 
ORION, Houston, 

A (garble) go we had another MA 
to 15 percent quantity is that what 



you 



Okay, if you guys are happy. 

Okay, Charlie, we've got one 

Stand by please. 
The rendezvous radar operate 



we'll go 
circuit breaker 
(garble) 11 



Okay, we got it (garble) 

This is Apollo Control Houston 112 hours 
44 minutes. That was Charlie Duke aroused briefly from 
his sleep aboard ORION. He had noted an RCS pressure light 
on, double checked with mission control to see if the 15 
percent was a proper number or an anticipated number. Don 
Pete:rson, the CAPCOM, checked with the flight control team 
here; and responded yes it was what we expected. We're at 
112 hours 45 minutes into the flight of Apollo 16. We show 
3 hcurs 7 minutes until official time of wakeup for the crew 
aboEird ORIAN and this is Apollo Control Houston, continuing 
to men it or . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h 111/ 11 CDT 4:38 GET 112:46 MC-412/1 

PAO This is Apollo Control Houston at 112 hours 

55 minutes into the mission. We've just had loss of signal 
with the command module Casper as it passes over the back side 
of the Moon on it's 20th revolution. We're at 112 hours 56 
minutes and this is Apollo Control Houston. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4-21-72 GET 112:56 CST 4:48 MC-413/1 

PAO This is Apollo Control Houston at 113 hours 

43 minutes now into the flight of Apollo 16 . We're a little 
over a minute away at this time from acquiring Command Module 
CASPER on its 21st revolution around the Moon, so at this point, 
we'll bring the line up live and continue to monitor. This is 
Apollo Control Houston. We are now receiving data from the 
spacecraft CASPER. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY CST 5:38 GET 113:45 MC-414/1 

PAO We are now receiving data from the 

Spacecraft Casper. We're at 113 hours 45 minutes ground 
elapsed time. This is Apollo Control Houston. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kllim MC-415/1 



/ 
/ 



This tape not transcribed. Entire text 
of tape is repeated on tape 416/1. 

APOLLO 16 MISSION COMMENTARY CDT 5:55 GET 114:00 MC-416/1 

PAO This is Apollo Control Houston at 114 hours 

15 minutes ground elapsed time. At this time I would like to 
repeat our previous announcement that Flight Director Gene Kranz 
has just completed a status discussion with flight control team. 
A first cut preliminary flight plan has emerged. Our present 
plan is to shoot for the 3 EVA's. Each of about 7 hours duration 
EVA 1 is set to start at 119 hours 28 minutes ground elapsed 
time. EVA 2 start time lAl hours 43 minutes GET. And EVA 3 
about 165 hours 30 minutes ground elapsed time. Each of these 
EVA's would be separated by rest period of 8 hours in essence 
surface activity would be flopping back to Apollo 15 tight 
schedule. The traverses for John Young and Charles Duke would 
be much like the planned pre-mission taking into account the late 
landing time. If this plan continues to hold good the lunar 
liftoff will be at 177 hours 28 minutes ground elapsed time. 
Needless to say the consumables outlook for Apollo 16 is favorabl 
The closest consumable item aboard Orion is water in the descent 
system. And this is 5 to 6 hours above the 3 EVA margin and even 
this could be increased if needed by cutting down electrical 
power or using from the ascent system to the equivalent of 8 
hours. In summary our out look to this point is good. We show 
our wake up clock in Mission Comtrol shows 1 hour 36 minutes 
till time of wake up and our ground elapsed time 114 hours 17 
minutes. Continuing to monitor this is Apollo Control Houston. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4-21-72 GET 114:19 CST 6:13 MC-417/1 

PAG This is Apollo Control Houston at 114 hours 

56 minutes into the flight of Apollo 16. We've had loss of 
signal with the Command Module CASPER as it crosses over the 
back side of the Moon on its 21st revolution. At 114 hours and 
56 minutes, this is Apollo Control Houston. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY Mlljll GST 7:26A GET 115:31/1 418/1 



PAG This is Apollo Control Houston at 

115 hours 32 minutes into the flight of Apollo 16. Our 
countdown clock in Mission Control shows some 21 minutes 
until official wakeup time for astronauts John Young and 
Charles Duke aboard the Lunar Module Orion. However, 
our Flight Surgeon here in Mission Control reports via his 
biomedical instrumentation that Lunar Module Pilot Charlie 
Duke appears awake so we will stand by with the line open 
and live in the event he hears from Orion before the of- 
ficial wakeup tiiT.e. We're at 115 hours 33 minutes ground 
elapsed time and this is Apollo Control Houston. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY Ullljll CST 7:44 GET 115:50 419/1 



site 



did. 



ORION 

h an dove r 

CAP COM 

Why did 
ORION 



(garble) cheerup. 
about 20 minutes ago? 

Hold on I'll check 
you get King there? 

Okay you (garble) - 



uplink a little bit drop the uplink and 



static and that's 
I picked up EKG 
CAP COM 

did. 

ORION 
ORION 
s t a tus rep o r t I'll 
CAPCOM 
PAO 

Control from the 
ORION 



Did you guys have a 

Okay yes I guess we 

While you've got the 
a big blast of 



why 



I picked up the EKG -- and that's why 
about 20 minutes ago. 

Okay. The docs ' over here say yes you 



Let me give you 



you re ready 



Yes , okay 
Okay, Tony, if 
give it to you. 
Okay we're ready, go ahead. 
That's Charlie Duke talking 
Lunar Module Orion. 

(garble) did not eating the 



— s t an db y . 

for the crew 



to Mission 



rye bread. 

everything else and add a food stick into that also. For 
my meal I ate everything but the rye bread and add a drink 
bag and a food stick. That's the EVA beverage, add that 
and the food stick. From that occasion John had none and he 
got 7-1/2 hours of good sleep and for me I had a second all 
and I slept for about 6-1/2 to 7 hours, I think, and it 
good, o ve r . 

CAPCOM Okay we copy that. Sound real fine 

you got John to eat one of those food sticks? 



At e 



was 



real 



You 



me an 

ORION 

CAPCOM 

PAO 

position in Mission 

ORION 
woke him up 
s t an d it any 

CAPCOM 
line it's wake 

ORION 
t i mes , o ve r . 

CAPCOM 

CAPCOM 
for the LM liftoff, 

ORION 

CAPCOM 



not 



Bel i e ve it or 
Outs t an din g . 

That's Tony England manning the CAPCOM 
Control at this time speaking with Orion, 
(garble) in the — we just had -- I just 

ago, as a matter of fact. I couldn't 



just a sec on d 
1 on ge r . 

Ve ry good 
t ime . 



Now you're right on the time 



up 



Houston we're ready to copy our lift-off 

Okay standby one. 

we've got the flight data 



T24 , 
126 , 

be 



Okay Charlie 
LM (garble) . 
(garble) . 
Okay. T22, 16T , 



55 , T25 , 122 , 25 , 28, T26 , 22 



29, 51 , T2 3, 118 , 2 8 , 
24, 00, T2 7, 



22 



120, 26 

22, 32. This assumes GT update of 001148 and Ken will 
getting that update in about 2 hours. 

ORION Okay. Understand starting with the 22, 

116 plus 29 plus 51, 118 plus 28 plus 22, 120 plus 26 
plus 55 , 122 plus 25 plus 28, 124 plus 24 plus 0 0, 126 plus 22 



APOLLO 16 MISSION COMMENTARY kjll/ll CST 7:44 GET 115:50 419 



ORION 
of 11 minutes and 

CAP COM 
kin update to your 

ORION 

CAP COM 

ORION 

CAP COM 
In cross in g out 
Like you to put 

ORION 
"hank you much. 

CAP COM 

ORION 

CAP COM 



plus 32 and then assume the GET update 
48 seconds for Casper, over. 

Okay that's a good readback and we have 
Lunar surface checklist. 
Go ahead. 
Okay on 11-1. 
Go ahead. 

Okay I guess we were too quick last 
that PRO, hold until standby light off. 
that back in. 

Okay. T>-" ' 



ni gh t 
We ' d 



Okay on 
St andby 
Okay . 



Don't worry we d of done that, 
page 11-2. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k/21/12 7:51CST 115:58GET 420/1 
ORION Go ahead. 

CAPCOM Okay, under that PSM there is update. We'd 

like to have the note. 

CAPCOM PSM rest should be used only in the event 

of LGP flash PMC clock sync is required. And when it registers 
Rl 0011 R2 133 46 R3 256 21. 

ORION Okay, say Rl and R2 again. 

ORION Okay, Rl 00011 R2 133 46. 

ORION Okay, mode is PSM VERB to be used only in 

event of LDC PMC clock sync Rl 0011 R2 133 46 R3 256 21 and that's 
what we got loaded or is that what we've loaded this morning 
t o syn c up . 

ORION Okay, that's what you'd have to load the 

sync up after they fix the PSM time. 

ORION Okay, thank you much. 

ORION Okay, and that's the end of that and I'll 

brief you on the traverse whenever you are ready. 

ORION Let John get on the COMM. It'll be a 

couple of minutes before the eat period. We'll give you a 
call while we're eating. 

CAPCOM All right. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kllllll CST 7:57 GET 116:03 421/1 



PAO This is Apollo Control, Houston, at 1116 hours 

7 minutes into the flight of Apollo 16. As you've heard, the 
crew aboard Orion are now awake and CAPCOM Tony England in 
Mission Control has had some conversations and passed up some 
pad data to lunar module pilot Charlie Duke. Meanwhile, in 
the Mission Control Center, the flight planners are pressing 
ahead further in this activity, and also, refining the flight 
plan itself. We now show the transearth injection burn at 
a time of 222 hours 21 minutes ground elapsed time. We're at 
116 hours 7 minutes continuing to monitor, this is Apollo Control, 
H o us t on . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kllXlll GST 8:02 GET 116:09 422/1 



ORION Hello, Houston. Good morning. 

CAPCOM Good morning, John. 

ORION You worked all night, Houston? 

CAPCOM No, no. I went home and sacked out. 

ORION Good. Okay. Go ahead with your EVA stuff. 

CAPCOM Okay. Now these are the backroom's best 

guess. That Spook sampling maybe compromised by that ray 
from South Ray that you described, but since we're mostly 
interested in local feeling on EVA-1, you'd probably have 
to spend a little time trying to differentiate between second- 
aries coming in from South Ray and local material. You 
described most of the Ray material as being very angular. 
One or two may be rounded blocks for local material. At Flag 
again, you may have the same problem since (garble) over 
there, we really couldn't tell and we don't want you to feel 
bound to Plum Crater there at Flag; if there's another place 
on the rim of Flag where you're more likely to get local material, 
feel free to head for it. 

ORION Okay, we'll do the propellar and the Ray 

will be a pretty good job, if it's all right. 

CAPCOM All right and there's the (garble). 

ORION (garble). 

CAPCOM I'm sorry, John, go ahead, 

ORION It sure looked all right at pitch over 

th e re . 

CAPCOM Right. And I guess we'd like you to go 

ahead on a normal EVA-1 there and not worry too much about the 
local blocks in the LM ALSEP area, we'll try to pick them 
up at the end of the EVA-1 or at station 10 in EVA-2, 

ORION Roger. 

CAPCOM And again, on the traverse, itself, we'll 

skip the TV getting out, since we won't have AC and all and high 
gain, and so you don't have to worry about deploying the TV 
and tripod and we'll leave the TV for Charlie when he gets 
the LCRU out. We will need a few more words during the ALSEP 
deploy or, correction - during the LRV deploy, since we won't be 
able to watch it. And our best guess on the ALSEP area is 
still sort of northwest of you there, but it will be completely 
up to you whatever looks best. And again, on the use of the UV 
camera will - we'll give you real time update from it. 

ORION Okay. I guess we're going to have to put 

the UV a little closer to the vehicle because of the current 
(garble). Probably won't make a lot of difference there. 

CAPCOM Okay. And if you guys are all for it and 

everything, we're still trying to crowd in the EVA's. 

ORION What do you mean, are we all for it? 

CAI'COM Well, I just thought I'd give you a chance 



APOLLO 16 MISSION COMMENTARY kjlXlll CST 8:02 GET 116:09 kll 1 1 



CAPCOM to put your vote in. 

ORION I'm not for crowding them in, but let's 

do th ree c f ' em ! 

ORION Tony, Charlie, please pass on to the 

ALFMED PI the sun proves that you can see those light flashes 
an the lunar surface just like translunar code and you can 
also see into lunar orbit in weightless periods. Over 

CAPCOM Okay, did you notice any change in frequen 

ORION They're about the same as the (garble) 

experiment we ra;! , but they were about the same as they were 
in lunar orbit. 

CAPCOM Okay, understand, they were less than in 

the experiment but about the same as in orbit. 

ORION Yeah, and I think there was about, let me 

say I maybe saw 10 before I went to sleep and I think I got 
to sleep pretty fast so, they aren't really too numerous, but 
you can see them. 

CAPCOM Okay, very good. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hllljll CST 8:34A GET 116:40 423/1 



PAG This Is Apollo Control Houston at 

116 hours 42 minutes into the flight of Apollo 16, we've 
not heard for awhile from Lunar Module Pilot Charles Duke 
or Commander John Young, aboard Orion. Apparently, the 
2 crewmembers are having breakfast. One correction to an 
earlier number, we identified 222 hours - 

ORION I think we're down to 117 03. What 

time have you got 

CAPCOM 

ORION I say, we're down to 117 hours and 3 

minutes, we're ready to don suits, what time have you got? 
CAPCOM 116 42 . 

ORION Okay, we're going to go ahead and do 

Understand that when we get it on and get the PLSS 



I'm sorry, John. Say again 



i t 



on 



we'll dress and go ahead and get out cause we don't have 



very good way to keep time in here. 



CAPCOM 
here, we'd like you 
lit tie bit , though . 
ORION 
CAPCOM 
ORION 
CAP COM 
S-band antenna 
ORION 
CAPCOM 
CLOSED. 

ORION 
CAPCOM 
ORION 
CLOSED. . 

ORION 
CAP COM 
match the indicated 
ORION 
CAPCOM 
ORION 
CAPCOM 
PAO 

was based on 
however, is based 



Okay, understand, 
to mess with your 



Okay, do you want 
If you're re ady . 
We 're re ady . 
Okay, circuit breaker 
CLOSED. 

It's CLOSED 
Okay, panel 16 on the 



We do have a procedure 
steerable antenna a 

to do that n ow ? 



panel 11 AC BUS B 



comm, S-band antenna 



CLOSED. 

Displays , CLOSED. 

Displays CLOSED and meter S-band antenna 



be 204 hours 30 

ORION 
my needle here, 

ORION 

ORION 
an d n ow it's on 



S-band antenna heater breaker CLOSED. 
Okay, on the steerable manual controls 
an gle s . 
Ok ay . 

Okay, the track mode to slew. 
Track mode to slew. 
Stand by a second, please. 
The 221 hours or 222 hours 21 minutes 
a nominal flight plan TBI, Our present plan, 
on a 1 day early return and this would 



minutes for the transearth injection. 

Watch it, John, I just got a jump on 
on t he audio. 

Yes . 

It's always been stuck on 12 before 
min us 75 . 



APOLLO 16 MISSION COMMENTARY h/21/12 CST 8:34A GET 116:40 423/2 



h ere 

knob 



the 



ORION 
there, of course 

ORION 
Ho us t on ? 

CAP COM 
another problem 
ORION 
CAP COM 
liircuit breaker 

ORION 
a f r ai d of. N c v 
CAP COM 

We had 
to fully 
ORION 
CAP COM 
ORION 
CAP COM 
fully clockwise 
ORION 
CAP COM 
ORION 
CAP COM 
ORION 
CAPCOM 
;:f the S-band 
ORION 
ORION 
ORION 
CAPCOM 
i:hat procedure 
ORION 
CAPCOM 
fstart the mode 
ORION 

indi caters 
CAPCOM 
a t min us 12 . 
ORION 
CAPCOM 
circuit breakers 
panel 11, S-band 
ORION 
CAP COM 
ORION 
CAP COM 
ORION 
CAP COM 
ORION 
CAPCOM 

open . 



But it 
you d on ' t 
Ok ay, 



doesn't look like it 



75 out 



know with the PITCH, 
what do you want to do with it now. 



h e re 



Stand by 1 on that. We're working on 



(garble) Working another problem. 
Okay, we'd like you to close inverter 
select inverter 2. 

That' 



an d 

Okay , 
it's b ack 

Okay, we 
track mode 



you got 
to 12 , 
'11 
to 



it 



s what I was 



start 
si ew , 



drawin g 
set the 



a p roce dure 
PITCH control 



counter clockwise. 
It is . 
Ok ay , t rack 
It's OFF, 



mode OFF. 



Okay, now set both PITCH and YAW knobs 



It is 
Okay , 
Ok ay . 
Okay , 



go to track mode slew 
And the antenna didn' 
we understand, it did 



t move, 
not move, 
y aw . 
an d see 
closed. 



both 



YAW 



Negative, either in pitch or 
Okay, look on your panel 16, 
antenna circuit breaker is open or 
It's closed. 

Wh at a bunch of bullshit, 
(garble ) 

Okay, we're just going to back out of 
Let's go track mode off. 
(garble) Charlie. 

And match indicator to angles and 
circuit slew. 

Tony, with the track mode to off, 
are minus 75 . 

Okay. Okay, set your pitch at 180 and 



It's set. 

Okay, and go through and we'll pull the 
that you set for this procedure that's on 
antenna closed, pull it open. 

Ok ay , it's open. 

Okay, on 16, S-band 

Say, Tony. 

Okay, John. 

Go ahead. 

Okay, the S-band antenna 
Go ahead. 

Okay, displays open, and the heaters 



antenna open. 



open. 



APOLLO 16 MISSION COMMENTARY li/21/12 CST 8:34A GET 116 : 40 42 3/3 



an d 



2 off 



ORION 
CAP COM 
in ve r te r 
ORION 
CAPCOM 
ORION 
angles for lock 
CAPCOM 
ORION 
CAPCOM 
should be a 
for lock on 
it when you 

ORION 
in YAW, he 
ORION 
ORION 
doesn't sound like 
ORION 



on 



good an 
We ' re 
get out 

can get 



It's op en . 

Okay, inverter 2, circuit breaker open, 
Rog. That's done. 

Okay, let's press on with your suits. 
Okay, Tony. What are the nominal 
air and on this attitude? 
I'll get those. 
Ok ay . ( garb le) 

Okay, the 180 and minus 12 we gave you 
gle. And that's for photography, not 
going to have you take a picture of 

Roger. Wh en Charlie moves the needles 
it to oscillate it in plus. 
Plus or minus what? 

Plus or minus 3 degrees- The antenna 
it's moving. It sort of sounded jiggly. 
What are you doing now, Charlie? 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kilXjll CST 8:44 GET 116:50 424/1 



CAPCOM Okay, John and Charlie, we'd like you to 

press on with the EVA work -- if we mess with that S-band 
anymore, we'd do after the EVA, I've got a note here; I 
don't know whether it's right or not but it says that you 
won't be able to hear the yaw motor. 

ORION Okay, but Charlie is looking at it out 

the window and it's not moving. 

CAPCOM Okay, there's a latching mechanism in 

the thing there that should have released when the thing was 
uns towed and we ' re going to try to have you take 
of it because a lot of it polks out there and we 
from the picture whether that latch 
be a little bit of slop in there so 



released and 



a picture 
can tell 
there should 



ORION 


I understand. 






CAP COM 


Maybe you 


could 


drive it a litt 


le bit. 


fO RI m 


Ok ay , on e 


copy check, we're rea 


dy. 


ORION 


( garble) . 








ORI ON 


Okay . 








ORION 


( garb le) 


( He avy 


background) . 




ORION 


( garble) 


( He avy 


b a ck g r oun d) . 




ORION 


You should 


see me hold up this 


s tit ch 



without breaking move with one hand while Charlie is unzipping 
it with one hand. That's really neat. 

CAPCOM Right 
G b ack he re . 

ORION Yeah, 
this is. 

ORI ON 

ORION 

ORION 

ORION 

ORION 

CAP COM 

ORI ON 

ORION 

ORION 

CAP COM 

ORION 

CAPCOM 

ORION 
to you. 

CAPCOM Okay. If it's not too late on Charlie's 

helmet there, there's a few people that just want to make sure 
they washed it out with water to get that orange juice out before 
he puts that anti-fogging stuff in there. 

It's never too late to do something like 

do it . 

Okay . 

You could've done it last night, you ass hole 



Bring some of that 1 stretch 
You earth people don't know how nice 



Got it . 

Where are we going to stow them? 
(garble) (Heavy background), 
(garble) first. 

Got to put these (garble) in first. 
Put your flashlight in first. 
Yes ( garble) . 

We already got down here this morning (garble) 
(garble) . 

Yeah, how about this other problem? 
(garble) . 
Charlie, Houston. 

Charlie is putting on his suit. I'll talk 



ORION 
that. We'll 
CAP COM 
ORI ON 



APOLLO 16 MISSION COMMENTARY GST 8:44 GET 116:50 424/2 



ORI ON 


They want 


you 


t o 


wash it off 


with water 


J. c J \j \X dll y 


antl-fogging in 


the 


re . 






ORION 


Huh ? 










CAPC OM 


Roger, John, w 


e copy that. 




ORION 


What did I 


s ay 


? 






CAP COM 


Roger, we' 


re j 


us t 


giving you 


a hot night. 


ORION 


Are we on 


mike 


7 


CAP COM 


Yes , you s 


ure 


are 






ORION 


( garble) . 











END OF TAPE 



APOLLO 16 MISSION COMMENTARY hj2\n2 8:55CST GET 117:01 A25/1 



ORION 
to s a ve time . 

ORION 
want to go normal 

CAP COM 

ORION 

ORION Isn't going to 

PAO This is Apollo 

4 minutes since liftoff. The crew 



GARBLE (background noise) . Want to do it 



Do you want to 
voi ce ? 
St andby 
GARBLE, 

T „ ' 



be in down voice or do you 



o needing with their 
Control Center here 



(Background noise). 

be very long. 
Control Houston 117 hours 
aboard ORION, John Young, 
EVA preparations. Meanwhil 
in Houston detailed plannin 



Charles Duke p 
in the Mission 

for the first 2 EVA' s is in progress. Consumables will be 
closely observed during this period and leaving the third EVA 



as an 



open option but at the same time aiming toward that 



We ' 
i s 



possibility, 
time and this 

ORION 

CAPCOM 

ORION 

ORION 
old GARBLE. 

ORION 

CAPCOM 

ORION 

CAP COM 

ORION 

ORION 

CAP COM 

ORION 
GARBLE. It's where 

ORION 

ORION 
can't - GARBLE. 



re at 117 hours 5 minutes ground elapsed 
Apollo Control Houston. 
2 and 4 ones . 
Okay, 2 and 4 ones. 

My entire pitch 5 pounds you're (GARBLE). 
Heavy background noise (GARBLE). Go to th 

Al 1 ri gh t . 
Orion, Ho us t on . 
Go ahead. 
Verify aft OMNI. 
Aft OMNI Charlie. 



We're on aft OMNI. 
Okay . 

You're GARBLE, really bad. Right there, 
the GARBLE dips up GARBLE. 
Okay, right now and - 
Charlie could you straighten up 



a little I 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h/21/12 9:04CST 117:11GET 426/1 



You're a good boy, Charlie, you can go 

for it n ow . 

Okay, got it. That's it. Okay. Okay. 
Pull it through this. Now. 

Got it. Ha! Ha! Ha! Well, here we go 
(garble). There is just no way for a human being to get this 
crinkle out of there because he ain't got three hands - four 
hands does a good job. One to pull up a zipper and two to 
hold the crinkle, or three hands. 

CAPCOM Orion, Houston. 

ORION Go ahead. 

CAPCOM At your convenience we'd like you to switch 

lile canisters and jettison to use them. 

ORION Okay. You want to switch the lile canisters 

uni t . 

CAPCOM And we have some changes to your surface 

checklist and your EVA cue pack. 

ORION No, but they go in - report Charlie. 

O^ION Okay, and leave the bracket for the 

c an i s t e r . 

Understand, leave the brackets for the LOI 

c an i s t e r . 

CAPCOM That's affirmative. 

^^^ON Okay, go ahead with the changes. 

CAPCOM Okay, on your EVA 1 cue card. 

ORION Go ahead. 

CAPCOM Okay, on EVA 1 PREP - right hand column 

3rd line it says COMM modulate FM. 

EVA 1 prep right hand column. Okay, modulate 
FM. Do you want to change it too? 

CAPCOM Right, we want to delete the modulate FM 

and delete power amplifier primary. 

ORION Okay. 

CAPCOM Okay, about halfway down that column under 

COMM it said telemetry biomed off? 
ORION Yep. 

CAPCOM Okay, delete that telemetry BIOMED OFF and 

2 items later it says recorder on - delete that line also. 
ORION Okay . What else. 

CAPCOM Okay, standby a second. 

O^ION (Garble) Yeah, that's right they are 

hard to beat. (Garble) No, they want to do it now. Okay, Houston 
we re in secondary. On that LOH jazz, Charlie is changing it now. 

CAPCOM Okay. 

Weaken it, Charlie, there is too much (garble). 
What (garble) comm you got? 

CAPCOM Okay, John on the backside of that EVA 1 

and the EVA post - 

ORION Okay. 

^^^COM Okay, it's on the bottom half of the card, 

left hand column, third line up - it says telemetry biomed left 



APOLLO 16 MISSION COMMENTARY kllXlll 9:04CST 117:11GET 426/2 



ORION Okay. 

CAPCOM Delete that line. 

ORION Okay. 

CAPCOM Okay, go to your surplus check list, page 



3-4. 



ORION Verb and checklist page 3-4. Go ahead. 

CAPCOM Standby one. Okay, left hand column near 

the bottom of the page it says on Houston gear telemetry, 
PCM. low, delete that line. And delete the next line S-band 
voice downvoice backup, delete that also. 

ORION I wasn't going to stick it in there until 

you got that thing sharp. Okay. 

CAPCOM Okay, John, we've got very poor comm, we're 

going to have to drop the link for a minute here, we'll be back 
i-n a minute . 

ORION Okay, I missed all you said about that 

page 3-4. Do you read me? 

CAPCOM Rog, I just now - I'll come back to you in 

a minute with 3-4 again. 

ORION Okay, philosophically speaking I would like 

to get all these changes in before one or the other of us puts 
on a pressure suit because we're in energy conservation mode 
of operation now and I'd like to keep it that way. 

CAPCOM Right, I sure do agree with you John. 

ORION Okay. Okay, Houston the LOI canister GARBLE 

we're back on the primary. 

CAPCOM Okay, we copy. 

ORION Okay, John has got his suit on and he's all 

laced up. He's got a shot of water. 
CAPCOM Very good. 

ORION That was good, how I know it. What to go 

ahead with the checklist changes or you want to - me to don my 
suit . 

CAPCOM I'm trying to get an answer here. 



SND OF TAPE 



APOLLO 16 MISSION COMMENTARY hll\ll2 CST 9:15 GET 117:20 427/1 



2 3 
in 



ORION 

ORION 

CAPCOM 

ORION 

PAO 

minutes since 



Coming in? 
( garble) 
(garble) 

(garble) ' 
This is Apollo Control, Houston, at 117 hours\ 
liftoff. The crew aboard Orion moving forward 



f rom 
t urn 



the 



w e 



•11 



their EVA preparations. Meanwhile, in the Mission Control 
Center, a shift turnover is in progress. Pete Frank's Orange 
Team of flight controllers in the process of taking over. 

CAPCOM Okay, on page 3-4, the bottom left-hand 

two lines, palametry TCM low and S-band voice downvoice backup, 
delete both lines. Okay, on the right-hand column, of 3-4, the 
third line from the bottom, it says cabin gas or turn auto, 
change that to open. Did you get that Charlie? 
ORION I copy. 

CAPCOM Okay, on page 3-6, the fifth line 

bottom on the left-hand column. It says cabin gas or 
auto change that to open also. 

ORION Okay, Tony. 

CAPCOM Okay, we got it for now. Later on 

have to change the cue cards for EVA-2 and 3 but that's 
the extend of the checklist change. We've got one note for 
We're going to have a change to the material — to the 
that you bring up during the transfer on the EVA-1 and 
catch you before you go up and remind you about 
ORION Okay. (garble) later. 

CAPCOM Okay, good show. 

PAO This is Apollo Control, Houston, 

minutes ground elapsed time. Following the shift 
be no change of shift briefing. I repeat 
change of shift briefing. 

(garble) I hope I never have to 
(garble) over there. 
( garb le) . 

Okay, (garble) first. 
It's bigger than me. 
You mean it's bigger than I 
Ok ay . 

Okay, Houston, (garble) off 
( garb le ) 

Charlie, you're very weak. Say again 



you. 
gear 
I' 11 



25 

the re will 
will be no 
ORI ON 
ORI ON 
ORI ON 
ORI ON 
ORION 
ORION 
ORION 
ORION 
ORI ON 
CAPCOM 



it 



11 7 hours 
ch an ge , 
there 

do that. 



am 



comm , 



END OF TAPE 



APOLLO 



16 MISSION COMMETNARY 4/21/72 CST 9:25 GET 117:31 A28/1 



ORION 
I ORION 

ORION 

ORION 

CAPCOM 

ORION 
g TO und noise) , 

CAP COM 

ORION 

CAPCOM 
tho ugh . 

ORION 
some trouble with 



Make it (garbled and heavy background noise). 
Okay, Houston. 
(Heavy background noise.) 
Houston, how do you read, over? 
Oricn, Houston. Go ahead. 

Ken's been trying to (garbled and heavy back- 
Okay , ( garb le d) . 

You're very weak, Charlie. 
H ow ' s th a t . 
You're still weak, 



I think we can copy you 



Okay, look, 
the comm here. 



We ' re 
Hank . 



going to 
Are you 



probably have 
sure you want 

to stay in (garble) or just exactly what. We're ready to go into 
the (garble) the lunar S-band (garbled and heavy background noise) 

CAPCOM Okay, we think this is the system with the 

best signal margin, I guess we'll have to stay with it. 

ORION Okay, you'd better think about the (garble) 

comm then and we're thinking maybe we could sort of go with (garbl 
you guys when we get out on the surface. 



CAPCOM 

ORION 

CAPCOM 

ORION 

ORION 

CAPCOM 
dry out your helmet 

ORION 

ORION 
ri gh t ? 

ORION 
of thrust pressures 

ORION 

way or the other you 



How 
lo ud 



are 
and 



you coping us , 
clear, Tony . 



Charlie , 



Right . 
You' re 
Okay . 
(garbled) 

(Garbled and heavy background noise.) 
And Charlie, we would like to remind you 
pretty good before you put 
( garb le d) 

This is Charlie. You want 



that anti-fog 



to 

on , 



to check the OPS 



You've got 6 thousand pounds 
makes any difference. In one 



Okay, Charlie. 

( garb led) 
I don ' t see it 
d get out, it's going to be cluttered. 



Ri ght . 

ORION There you go, Charlie. 

CAPCOM Okay, Orion. We're going to have a site hand 

over, and maybe our comm will get a little bit better. 

ORION Okay. Hey, and look what I forgot to do. 

Idiot. Charlie see if you can (garbled). 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hll\ll2 CST 9:35 GET 117:41 429/1 



going 



ORIOK 
CAPCOM 
normal voice and 
CAPCOM 

ORION 
CAPCOM 
are too weak 
to downvoice backup 

ORION 

ORION 

ORION 

CAPCOM 
We'll have to press 

ORION 

ORION 

ORION 
check for (garble). 

ORION 

ORION 

ORION 

ORION 

ORION 
pose to be 

ORION 

ORION 

ORION 
b arb er . 

ORION 

ORION 

ORION 

ORION 

ORION 

ORION 

ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 



' 11 help. 
Houston, 



We ' d like to try the 



(garb le) 
Orion , Hous ton , 
maybe it 
Orion 

Loud and clear, 

Now, we can hear you down there 



how do you copy us 



to use. Standby one 



We 



but you 



re going to go back 



(garble) Have to. 
(garble) Charlie. 
Houston, Orion (garble) how 
Now, you're very weak there 
with it this w ay . 
(garble) . 

Okay, Charlie, (garble). 
Okay. (garble) Heavy background. 

I don't understand that (garble). 
What are you doing? 
(garble) 
Ok ay . 

Ye ah , w e ' re 
back up there. 



do you read ? 
Charlie . 



(garb le ) 



out of seat but you are sup- 



I ' m what ? 

(garble) into this thing? 

Okay. (garble) and then go right on to 



Okay . 
Two up . 

I'm sorry Charlie 
Look like it's on 
Okay . 
Charlie 



Haste makes waste 
Ch arlie. 



w ay 



you got a hold of a foot some 



we go 
h ap p e n s , 



Charlie (garb le) . 



Okay. There 
(garble) . 
See what 
Okay . 
Got it. 
( garb le) . 
Ok ay . ( garb le ) 
Okay . 
( garble ) 
( garb le) 
Le t ' s go 
So do I. 

Why don't we run the water? 
Man, it don't take long. 



spacecraft hoses or keep the 
on spacecraft hoses. Okay. 



w a te r . 



APOLLO 16 MISSION COMMENTARY hlll/ll CST 9:33 GET 117:41 429/2 

ORION Okay. 

ORION Okay, (garble) 

END OF TAPE 



APOLLO 16 MISSION COMMENTARY CST 9:45A GET 117:51 430/1 



good . 
1 



ORION Okay, that's 

ORION Okay, Tony, we're down to 

CAPCOM Charlie, this is Houston, 
a hard time copying you. John's a little bit 

Would you check that your mikes are up to your mouths or have 
J ohn s ay it? 

ORION (garble) Our mike is up to our mouths 



( garble) 

the (garble) 

We ' re having 
better th ere . 



n ow 



CAPCOM 
ORION 
ORION 
CAPCOM 



n ow 



ORION 
CAPCOM 
25 minutes . 
ORION 
He ' 8 



Okay , 
Ok ay . 
Tony, 
Lo oks 

Okay 
Your 



that's a little better. 

how are we doing on time? 

like you're a little bit ahead right 



comm check should come in about 



Okay , we don 
probably got a watch 



t really have a 



here, but we're 



that, 
wa t ch it. 

CAPCOM 
the chance, we'd 
ORION 
CAPCOM 
p roce dure s . 

ORION Okay, go. 

CAPCOM Okay, the steps we've 

3 zips, talk back barber pole, bat L, LMP 
bat 1 OFF RESET, talk back barber pole. 



feeling 
not ab le 



for 
to 



Roger. Understand 
like to put the lunar 
Understand. Lunar 
Right. If you want 



that. When you get 
battery on the LMP bus 
bat on the LM bus. 
I'll j us t re ad the 



got 
ON . 



here 
talk 



are bat 2 
back LMP. 



ORION 
Commanders bus 

CAPCOM 

ORION 

ORION 

ORION 

ORION 

ORION 

CAPCOM 
well en o ugh to 

ORION 

ORION 

CAPCOM 



on th e 



It 



you're saying, but if 



Charlie says that was OFF power 
probably won't hurt anything. 
Okay . 

Is that okay with you guys to do that? 
What are you hitting there, Charlie? 
(garble) 

Okay - how come you're not talking to them? 
Can you hear me? 

Well, Charlie, we're just not reading you 
understand what you're saying there. 
How ? 

How do you read now Tony? 

I can hear you Charlie, cause I know what 



wouldn't be able to 

ORION 
n ow Tony? 

CAPCOM 

ORION 

CAP COM 

ORION 



you say anything different, I'm sure I 
copy . 

Let me cover up my mike. How do you read 



About the s ame . 

Do I sound pretty bad too 

Say again, John? 

S ay again , John . 



T ony 



APOLLO 16 MISSION COMMENTARY kjlim GST 9:45A GET 117: 51 430/2 



ORION Do I sound pretty bad? I must. What we're 

trying to find out is if we have a c omm problem before we start 
getting into this any further. 



that 



the 



CAP COM 
you've done 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
bag. ( garble) 
ORION 



Alright, we understand. Would you verify 
the battery management on 3-9. 

You did the battery management, right? 

Yes, I'm done . 

That's completed, Houston. 

Close that bag. Here we've got (garble) 

Are you going to leave the bag? 

Yes. (garble) I'm just going to leave 

Houston, do you read 4 in OMNI any better. 



Stand by 1. 
( garble) 
Okay, Charlie 



I guess we'd like you to 



F, Charlie. 

Ok ay . It mus t 



They want you to go to 
Okay, I'm F OMNI now. 
Charlie , 

This is Apollo Control at 118 hours 
expect we're probably going to have to live 



Ove r . 

CAPCOM 
ORION 
CAPCOM 
go back to F. 
ORION 
ORION 
have unlocked 
P AO 

2 minutes . We 

with our rather marginal communications during the time that 
the comm is coming to us through the LM oinni directional 
antennas. Of course, we've had a problem with the Lunar 
Module steerable antenna. We're not able to use that. This 
is the larger high gain antenna, which we would normally 
use on the lunar surface. At the present time our ground 
station is Madrid, Spain, which has an 85 foot antenna, and 
the feeling from our communications engineer is that this 
is probably about as good as the communications will be 
until the crew gets out, gets the lunar communications relay 
unit in operation at which time we should see a rather 
dramatic Improvement in the communications. 

ORION If we can get it open. You don't get 

the handle all the way open. It'll never come any further 
than this Charlie. 

ORION That's unlocked right there. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY h/ll/ll 9:56CST 118:02GET 431/1 



ORION 

ORION 

ORION 

ORION 
It's sort of 

ORION 

ORION 

ORION 
drip battery 
locked. (Garble) 

ORION 



Roger. Move that cam. 
(Garble) (Heavy background noise) 
All right. Okay. All right. Yaw is good. 
What is this thing around the backup, Charlie? 
shallow water. 
Yeah . 

Roll Charlie. Roll the water (garble). 
Okay, PLSS water connection is off. This 
is locked. Banning cable is locked. Antenna is 
Make i t (garb le) . 
(Garble). Okay. (Garble) burn in, rog? 



(Garble) ( b ack g r oun d n oi s e ) . (Garble) around that way, Gerry. 
Okay, There we go. Okay. Hoses are above the bort strap. 
O^^ION (Garble) Okay. (Garble) All set. 

Go , 

This is Apollo Control at 118 hours 8 minutes 
and it appears to us that the crew is pretty much on their 
EVA preparation timeline. They are making about the progress 
we would expect and it looks as if at this point that they will 
be^fairly close to starting EVA 1 at about 119 hours, 20 minutes. 
We 11 continue to follow their progress and give you an update 
on that f o r on ce . 

Okay, Charlie, there's off, off, trump is 



off. 



85 00 



ORION 
P ump 
ORION 
ORION 



is off, 



Okay. Oh, look at that. (Garble) 
Houston, what site have you got on 



that - 



CAP COM 
cop y it. 

ORION 

CAP COM 
right into the mike 

ORION 

CAP COM 

ORION 

ORION 

CAP COM 

PAO 



Charlie, I can hear 



you talking, but I can't 



Can you hear me, Tony? 
Yes, John I can, if you 



talk slowly and 



Okay, that's what I'm doing. 
Okay . 

Charlie's got his PLSS on. 
Okay, Tony (garble) I've got my PLSS 



on 



Very good, we copy that Charlie 
This is Apollo Control that last report from 
Charlie Duke indicates that he has his portable life support 
system, the backpack that supplies oxygen and cooling water, 
removes the carbon dioxide from the suit loop on. John Young 
at this point is suited and is beginning to get into his 
portable life support system. 



Over . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hnUll CST 10:06 GET 118:12 432/1 



ORION Okay, the battery is in and locked. 

The battery Is locked. Controls are all off. The (garble) 
is locked. The controls are clear and the hose is locked, 

ORION See how that thing takes a set fold 

it up in there (garble) right there Charlie. (garble) behind 
you (garble). What? (garble) Charlie. He didn't believe it. 
Here let me take that thing off. Turn around this way. Can 
yon turn around this way? Okay, turn around this way. We'll 
see. Yes. Yes. How are you doing? Okay. Yes right here. 
Okay. Okay. now about another shot, Charlie. Okay. That's 
good. Okay, can you get my hose? Got it right here. Okay. 
::here's one little (garble), Charlie. Okay plus DELTA. 
Did we have our radar standby breaker in or out, Houston? 

CAPCOM Say again, John. 

ORION Should the radar standby breaker be in or 

Q U t ? 

CAPCOM Okay, we'll check. 

ORION Okay, Tony, we are starting the plant 

COM check momentarily, over. 

CAPCOM Okay, you're very weak but readable, 

Ch ar lie . 

ORION Okay (garble) mode S-band to BR, ICS to TR. 

PAO This is Apollo Control. The procedure 

the crew is going through at the moment is the Lunar Module 
Communications Check. They'll go through the various communi- 
cations modes to see that all are functioning. As we've 
said previously we expect the communications to be rather 
difficult until we get the Lunar communications relay unit 
in operation with its high gain antenna and its wide band 
antenna, at which point we would expect to see a rather 
significant improvement in the communications. That piece 
of equipment should be brought into operation a little over 
an hour after beginning the EVA. 

ORION the EVA. 

CAPCOM And Charlie we'd like that radar standby 

□ reaker closed. 

ORION Okay it's closed. EVA uplink (garble) 

and able. Better mark those off. Can't reach it. Uplink 
(garble) and Able. Okay. S-band my 3-band's VR, ICS to 
VR, relay to off, (garble) MATCH A to ZR, received. Okay. 
Middle lock. Okay. (garble) audio breakers closed. Okay 
going to A. (garble) get a turn-on of S-flag G, a 
press flag 0, an 02 momentary a PLSS 02 pressure gauge graded 
at 85 percent. Check with B&U. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kllXlll GST 10:17 GET 118:23 433/1 



ORION 
ORION 
ORION 
CAPCOM 



the 



i t 



background there. 
ORION 
ORION 
CAPCOM 
the squeal that 

ORION 
Your not keying 
ORION 
ORION 
CAPCOM 
You sound better 
ORION 
PAO 

crew onboard 
list prior 
pretty much 



Charlie, 
Gosh ! 
Ho us ton , 
Charlie, 



I don ' t re ad 



you 



now do you read you LSD. 
we hear you. You have a 



squeal in 



ove r 



I di dn ' t hear 



Okay , 



The 
ch e ck 
to be 
th em 



coming out on 
ORION 
ORION 
CAPCOM 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
and B to of f . PLSS 
ORION 
ORION 
ORION 
ORION 
NOUN 85. 

ORION 
ORION 
CAPCOM 
ORION 
CAPCOM 
ORION 
transmode . 
ORION 



Yea, I know. How do you read 
Can you read anything? 
Now we're coping you Charlie, 
time though . 

Over. I know what it is. (garble) 
at all. 

Houston, am 1 keying over? 
You are n ow . 

Yes, you are Charlie. How do you copy 
than you did on LM comm. 
( garbled) 

This is Apollo Control at 118 hours 25 minutes 
Orion, at the present time is going through the 
to depressurizing their cabin, and they appear 
on the revised flight plan, which would have 



us 



119 hours 
think I'm 



n ow 



the lunar module at about 
I cleaned them out and I 
(garbled) 

Okay, we copy that, Charlie. 
I can ' t help it . 

They said they copied that, John 
Oh . 

Nothing we can do about it 
Okay . 

Okay, we read. 
Okay . 
CB 11 
Okay, 
Mo de , 
CTT to maintain. 
Righ t . 
We go to B. 
Th e re ' s B . 

We have a (garble) and a PLSS tag, to 

Okay. (garble) PLSS 02 (garble) are 
(Garbled and heavy background noise.) 
Say again, Charlie. 

(Garbled and heavy background noise.) 
All we're coping you, but you're weak. 



20 minutes 
okay now. 



comman d 
command 
Charlie, 



audio open , 
audi o ' s op en 
your breaker 



VHF A to off 



PLSS 02 
98. 



Okay 
(garble) 



We 



re reading you 5-5. We're in 



APOLLO 16 MISSION COMMENTARY kjlYlll CST 10:17 GET 118:23 433/2 





ORION 


Comm check with the LMP in. You do the coram 


ch e ck 


now . 






ORION 


Hello, Houston. How do you read, over. 




GAP COM 


Okay, John. You sound good but again your 


w e ak 


also. 






ORION 


Okay, I'm hollering as loud as I can. And 


my microphones 


are right in my mouth. 




CAP COM 


Right, I can hear it bouncing against your 


tonsi les . 






ORION 


Okay. We'll switch over into AR now. 




ORION 


How now, Houston. 




CAP COM 


Okay, just like before. 




ORION 


Do you read, Charlie. 




ORION 


Okay, Houston. Your coming in beautifully, 


I ony , 


5 - 5 . 






CAP COM 


Very good. Actually your comm is better now 


th an 


for both 


of you than it was when it was on the LM. 




ORION 


Okay, great. Okay. 




ORION 


Ok ay . 




ORION 


Okay, Houston. My 02 (garble). 




ORION 


So is mine. About 99. 




ORION 


(garb le) 




CAP COM 


Okay, we copy that. 




ORION 


Okay. (garble) 




ORION 


Okay. S-band mode mark TM. Go. 




P AO 


This is Apollo Control. The crew continuing 


with 


their communications checks. At the present time they are 



using the communications system in their portable life support 
system, the back pack, and it's being relayed to us from the 
back pack through the LM communications system. And our estimate 
now on the begining of the first EVA is that they could make it 
about 15 minutes early if they continue at the pace they are 
going now. That would put them out of the lunar module at about 
119 hours 5 minutes. 



CAP COM 


Okay, we don't expect it 


till you get on the 


( garble) . 






ORION 


Ok ay , fine. 




ORION 


Okay. Toll as required. 


Circuit breaker 16 


cabin VCS repress 


clos ed . 




ORION 


Go , 




ORION 


Repress closed, verify. 


We'll stay in Delta 


B to open. 






ORION 


Go. 




ORION 


S-band Delta B number 2. 


( garble) 


ORION 


S-band 2. 




ORION 


S-b an d 2 op en . 




ORION 


Okay. Switch band selector to 2. 


ORION 


Stand by ECS caution and 


order step lights 


comr on in about 


a minute . 




ORION 


Ok ay . 





APOLLO 16 MISSION COMMENTARY kllYlll CST 10:17 GET 118:23 433/3 



ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 



(garbled) to EGRES, standby. 
Go , 

(garble) gas return to EGRESS, standby 
Go, 

Suit circuit released to auto, verify. 
Go. 

Okay. Your 102 hours OPS 



first, Suit isolution valve actuate (garble) 



ok ay 



into 
they 



) let me 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
P AO 
their 
carry 



connect your OPS 
Fine, and 
Yea. 

Th e re ' s a 
Okay . 
The re ' s a 



off. (garble) 
you. 

SET light. 



a min u te . LMP 
Their both up 



oxy gen 
on t op 



SET light, Houston. 
(Garbled and heavy background noise.) 
The crew at the present time is, their getting 
pert systems, the backup oxygen supply that 
of their back pack. Following that, they will 
be putting on helmets and gloves and getting set to begin depres- 
surizmg the cabin after a series of checks there 
ORION (garble) 

A few moments ago, Charlie Duke asked about 
television. We passed the word up that we do not expect television 
until they get the lunar communications relay unit in operation. 

END OF TAPE 



APOLLO 16 MISSION COMMENTARY 4/21/72 CST 10:27 GET 118:45 434/1 



ORION 

ORION 

ORION 

ORION 
Ue still (garble) 

ORION 

ORION 

CAP COM 

ORION 

ORION 

ORION 

ORION 

ORION 

ORION 

ORION 

ORION 

ORION 

CAPCOM 

ORION 

ORION 

ORION 

ORION 

ORION 

ORION 

CAP COM 
do that (garble). 

ORION 

ORION 

ORION 

ORION 
(garble) visor (g 

ORION 

ORION 

ORION 

ORION 
get it on wheneve 
that' s going tow 

ORION 

ORION 

ORION 

ORION 
way to the 

ORION 

ORION 

ORION 

ORION 

ORION 

ORION 



(garble) lock. 

Okay, now we're receiving. 

Okay . 

John, why don't you sack us some water, 
to go. 

Okay, just a minute. 

(garble) you might get Charlie. 

How's that? 

That's better. 

Ok ay . 

Okay . 

Got it? 

No. 

(g arb le) 

(garble) lock 30. 

(garble). And I'll get us a cool one. 
Ok ay . 

That's pretty smart, Charlie. 
Brace this here for a little bit. 
All right. 

Man, you're doing it. 
Okay . 

Okay, I'm turning off 
Okay . 
Let ' s see 
Let ' s keep 



the water. 



still do that, let's 
till we get down here 
position MIC. 



if we could 
doing that ' 
Okay, PLISS fan is on, 
Okay, (garble) is clear. 
That has it Jim. 

Don helmet, check flight bag position 
arb le) . 

(garble) helmet to the very back. 
Can you get it Charlie? 
(garble) here John. 

Let me try to get it on where -- try to 
r you get it down. I can see it. Oh, man 
ith it ( garb le) . 

Give it a t ry . 



(garble) . 
(garble) . 
Make sure 



the (garble) goes down all the 



back here 



This should be effective. 

But it feels like right over there. 

Same place as yesterday (garble). 

Ye ah. (garble). 

(garble) 

Let me put it on for you. I can see what 



APOLLO 16 MISSION COMMENTARY kllljll CST 10:27 GET 118:45 434/2 



ORION 
ORION 
ORION 
your head first 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
CAP COM 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
aren't you? 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
good don't it? 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
(garble) and we 
the PLSS hoses. 
ORION 
CAP COM 
ORION 
ORION 



you -- 
Okay . 

Just hold your head back. Get it over 
Watch out for the mike. 
Yeah, get that end tied. 
Now why don't you try it, John. 
Okay now we don the leaver. 
Okay going to (garble). 
I'll put yours on first. 
Careful we don't drop this glove. 
Yeah, I know it we'd be (garble), 
(garble) . 

That looks pretty good, John. 
Okay . 

Get it back on back? 
It is (garble), 
(garble) get mine out? 
( garb le) 
All righty. 

(garble) got it, Charlie. 

You're a little top heavy with the PLSS 



I feel a little bit -- 
(garb le) 
(garble) 
Ok ay . 

Turn around. 

Man, is that water cold.' 



Ooh, ooh. Feels 



Hey, can you get my tool harness straps? 
The re ' s one . 
Okay . 

Want me to get the other one? 
Okay . 
Got it. 

Okay. Hold on. Got this one? 
( garb le) . Down . 
See the other one? 
( garb le) 

Okay, SCG we got that and we're open to 
can disconnect the hoses and then connect up 

Ok ay . 

Okay, the pump is open. 
Okay . 

(garble) got yours, huh. 



APOLLO 16 MISSION COMMENTARY kll\lll GST 10:27 GET 118:45 434/3 



ORION 
ORION 
ORION 
would it? 

ORION 
ORION 

a 1 1 . 

ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 

(garble) in 
ORION 
ORION 
ORION 

checked yours 
ORION 
ORION 
ORION 
ORION 
ORION 

i;onne ctors . 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
CAPCOM 

;p ret ty well. 
ORION 



Yeah 



Throw that backup in there (garble). 

That's all right. It won't bother you 

No. 

Is yours? Well, put it back there on the 



I am , 
I 



Yeah . 

Ok ay , it's on 
An extra four 
S upe r , p ush . 
Okay, 10 minutes. 
Guess what? 
Be auti f ul . 
( garble) . 
In. And locked. 
Okay, we got your 



the wall, 
inches on 



this hose, 



hoses. (garble) okay, 



lo ck 



Okay. Helmets and visors alined and locked. 
0-2 connectors should be locked. 
0-2 connectors have been locked. I 
, Charlie. 

Pressure valves locked. 

Pressure valves locked. 

Boulder connectors locked. 

Boulder connectors locked. 

Boulder locked. We just checked COMM 



Locked. 



Okay, go to vertical. 
Okay, vertical. 
We verify CO configuration, 
(garble) turn the page. 
Couple minutes away, 
(garble) configuration. 
Okay . (garble) . 

Did you read all this, Houston? 

We sure can, Charlie. We're following 

And John. 



you 



:e;nd of tape 



APOLLO 16 MISSION COMMENTARY kllllll CST 10:38A GET 118:55 435/1 



ORION 

ORION 

ORION 

ORION 

ORION 
there anywhere, 

ORION 

ORION 

ORION 

ORION 
as Flash Gordon 

ORION 

ORION 

ORION 
one of those. 

ORION 
b o 1 1 om one . 

ORION 

ORION 
ORION 
ORION 
ORION 
ORION 
but that's ok ay 

ORION 
in , is yo urs in 
ORION 
ORION 
ORION 
ORION 
c 00 lin g . 

ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 
ORION 

say? 



do 



(garble) 

That John, (garble) 

Okay, my (garble) are on and off, Charlie. 
Okay, and I haven't started mine yet. 
You don't see one of those white gloves down 
you? 

don't Charlie. 
On the floor, anywhere? 
see on e . 

Ah ! He re it is . I ' 11 be 
with these gloves on. 

Hardly get the old fingers in them. 

do it for you Charlie? 
try this one, I need to get 
can you push them? 
push the top one, you push the 



No, I sure 
( garb le ) . 
No I don ' t 
(garb le) . 



Wan t me • to 
Hey let me 
Okay, now push. 
Okay, I'll 



as fancy 



Okay, there we go. (garble) 
Okay . 

Keep going, 
S upe r job, 
Let ' s 



it Charlie, 



, I think I've got 
Tom. Thank you. 
get that first connector check. 
Okay, wait a minute. It's a little loose 



Okay, (garble) okay 05 PLSS converter is 
(garble)? Yea. Check mine. Yea. Completely in. 
Completely in, Charlie. 
Okay, (garble) the clips off. 
Yes, mines off. Okay. 

Yes, mines on 2. Okay go ahead. Hey that's good 

Don't understand why I can't get cool. 
Circulate that (garble) 
Go ahead. 

Okay, pulse rate A and B to regress. 

Okay, press 02 on. Okay, (garble) 

Okay, fine, (garble) 

(garble) from 31 to 34 Charlie. 

Okay. How about the 02 flag, what does it 



It doesn't say nothing. It says 02 flag 



ORION 

straight in (garble) 

ORION Okay. 

PAO This is Apollo Control. Flight Director 

Pete Frank has just checked with his LM environmental systems 
engineer to see if we're ready for cabin depress - cabin 
depressurization and a report came back - we're GO for 
depressurization. 

(garble) Okay, mines off the tank. 
ORION Okay. There's 3. 

ORION Mine is 3 by. My regulator is 32. 



AFOLLO 16 MISSION COMMENTARY k CST 10:38A GET 118:55 435/2 



ORION 


Grabbing the wrong valve there. 


ORION 


Who me? 


ORION 


No , I di d it . 


ORION 


Okay, I'll start in a minute. 


ORION 


Houston, can you give us a mark at the 


end of a minute? 


Roger. I started the clock when you sail 


CAP COM 


ill was off. 




ORION 


Okay, mines off. 


ORION 


Boy, mines tight as a drum, John. 


ORION 


Yes, and mines leaked about, better pull 


it: down some. 




ORION 


Start at 382 down to about 372 now. 


ORION 


Mine are off to about a tenth also. 


ORION 


Oh, that feels good. The pressure point 


on the leg went 


away, John. There's no pressure. 


ORION 


Hey, when's the minute up Tony? 


CAP COM 


Okay, there's the minute now. 


ORION 


Took a long time. 


ORION 


Okay, I'm down to 37. Okay, mine are 


off 1-1/2 , Tony . 




CAP COM 


Say again yours Charlie? 


ORION 


(garble) Can't hear Charlie. 


ORION 


. 15 , righ t Charlie ? 


ORION 


Yes . 


ORION 


Feels like you're down to me. Back over 


a little bit, Charlie. You're off. 


ORION 


Okay, check mine off. 


CAP COM 


Okay, Orion, we're GO for DEPRESS. 


ORION 


Roger, GO for DEPRESS. 


ORION 


Your's are OFF Charlie. 


ORION 


Okay. Okay, read them. 


ORION 


(garble) cabin repress to OPEN 


ORION 


Okay. Don't need to close the comm TV 


breaker, I guess 




ORION 


No . 


ORION 


Okay, cabin repress valve to close. 


ORION 


Okay, go. 


ORION 


Overhead aboard dump valve open and auto 


at 3-1/2. 




ORION 


Okay, I'll get this one. 


ORION 


Okay. Have you got it open, Charlie. 


ORION 


Not yet. ( garble) 


ORION 


Okay, here we go, that's 4-1/2, 4, 3-1/2 


okay. Closed. Okay, gone of 3-1/2 LM suit circuit locked 


up at 4.3 (garbl 


e) 4.9 slowly. Okay. 


ORION 


Try to open for dump valve, Charlie. 


ORION 


Okay, you ready? 


ORION 


Yes . 


ORION 


Okay, here we go. It's open. There. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY 2/21/11 10:48CST 119:05GET 436 /1. 



ORION 
ORION 
ORION 
H ous t on . 

CAPCOM 
ORION 
CAPCOM 
ORION 
supposed to 
ORION 
ORION 
Charlie? 

ORION 
ORION 
ORION 
we'd be in 
ORION 
ORION 
ORION 
ORION 
able to 



GARBLE. 
Yeah . 

That ' s what I ' ve 



got. The p ress ure ' s ',at one 



be able 



Say again Charlie. 
Cabin pressure is down 
Roger, we copy. Roger 
A few minutes after we 
to open the for forward hatch. 
Now we're down to 5 tenths, 4 tenths. 
You want to put that back to R before 



to 1. 

we copy . 
started that, 



we were 



we get out 



it say 



t r o ub 1 e 



What does 
No, not. 

Better leave it closed -- 



if we had 



a wait 



open 



be 

I've got the handle down, 
open , Hous t on . 

ORION Wait a 



Now you don't really want to open that. 
You want to leave one in open then? 
We got it. The overhead is in open. 
Okay, John it's two tenths you ought to 
that beading. Here she comes. She's coming open 
I know it. There it is. Hatch is 



minute, wait 



minute, okay I got it 



Look at that stuff stream out of there. 

^^I'^N Okay. Forward hatch open, PLSS is open - 

partially open go ahead. 

Okay, forward hatch open, PLSS is open 
partially open, Can you get it? 

O^^ION Okay, it's off. Okay it's yours. I don't 

think you need GARBLE, Charlie. Drink of water? 



ORION 
you? Turn around 

ORION 
GARBLE. 

ORION 
P AO 

front hatch open, 
that Young can get 



You Sure 
Ch ar li e . 

Okay, wait 



are great with those GARBLE, aren't 
a minute. I'll try to turn around 



will get 

they get 

ORION 
ORION 
ORION 

out. Okay, 
CAPCOM 
ORION 
ORION 
ORION 

feedwater to 



Okay, there we go. GARBLE. 
This is Apollo Control the crew has the 
It sounds now as if they are maneuvering so 
in position to get out. We expect that we 



■, to an hour and a half, after 



television about an hour 
on the lunar surface. 

If you would turn sideways, Johnny -- 
If I could turn sideways I'd be happy GARBLE. 
Okay, you'll have to turn sideways to get 
rest until feedwater pressure comes out. 

don't have any telemetry here, 
have any telemetry here. Oh, 



let ' 



Wei 1, we 
We don ' t 
GARBLE . 
How long 



start feeding the cooling? 



Is it supposed to take to get 



yeah . 
the 



\^OLL0 16 MISSION COMMENTARY Ijlllll 10:48CST 119:05GET 436/2 

4 



\ 



out , 
will 

of 
t o 



ORION 
CAPCOM 
ORION 
P AO 

steps on 
be about 
the lunar 
about 100 
ORION 
ORION 
ORION 
w ay s , like I 
get out unless 
ORION 
ORION 
to do. Okay, 
ORION 
ORION 
clear. 

ORION 
ORION 
CAPCOM 
ORION 
me see if it" 
ORION 
ORION 
cooler. 

CAPCOM 
ORION 
ready to get 
CAP COM 
ORION 
ORION 
ORION 
ORION 
ORION 



minute s . 
About 4 minutes. 
Ok ay . 

This is Apollo Control when the 
the lunar surface, the temperature on 
90 degrees Fahrenheit in the sun. In 
module and the shadow of craters, it 
to 150 degrees below zero Fahrenheit. 
GARBLE . 
Okay , fine . 

You can't get back in that corner 
am. You can't - you aln 
you can get around. 

Baby, that's as 
So do 

get out and I'll put in the -- 

I've still got a Flag A, you do too. 
The GARBLE is clear, very minor, isn 



crew gets 
the surface 
the shadow 
will be down 



t goxng 



to be 



No , 

ab 1 e to 



s i de - 



far 
. 1 



as I go, 



I, but that's what we're going 



you 



You don't have any flags, Charlie, 
Okay, Houston, the H20 flags have 
Okay, we copy that. 

Okay, to go to intermediate orbit 
s working. 

It's w ork ing . 
Houston, can we go to 



to have 



mm e 



flared , 



just 
2 and let 



intermediate on the 



Okay, Houston are we 



Ch arlie 



Rog, that's okay. 
I feel mine working, 
out - we're ready to get out. 
Okay, let's go. 
Hey, why don't you go on up 
Take care of the EPP Charlie. 
I'll give you that when you get out. 
Got to get my PLSS antenna right. 
No, not quite not now. It comes later. Okay, 
Okay, PLSS is over on - partially over onto the 



okay . 



get your feet out, 

porch. Come this way a little bit. Okay, you've got your 

Your right corner is on the door over there. Throw your 



PLSS 



hung 
rear 



up . 

en d — 
ORION 
ORION 
ORI ON 
ORION 
ORION 
ORION 



th e re 



1 1 



you go , 
Okay , 
Okay . 
Okay , 
Ok ay , 
Ok ay , 
Ok ay , 

Houston I'm standing out on the porch I've 
hand and just sort of looking around here. 



you got 
Charlie . 

Can you stand on the porch? 
wait a minute. I'll get the 
that's the jet bag. 
GARBLE. 



EPP now 



okay are you ready to go 



Okay 



got the ETB in 
my golly what 



one 



APOLLO 16 MISSION COMMENTARY h/lllll 10:48CST 119:05GET 436/3 

a view. 



CDR 

was talking about 
ORION 
LMP 

CAP COM 
LMP 

out , Hous t on . 

CAP COM 

LMP 

CDR 
Charlie . 

LMP 



I can see the big boulders Ch^arlie^ 

Howfarbackisit? ' \ 

Hey, Houston how do you read me over. 
Hey, you sound good there. ' - 

Okay, I guess Johnnie's about out, about 

Very good. 

He's on the porch. Very good. 

Take old ETB and go down the steps here 

Okay . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hUlIll CS T 10:56 GET 119: 14 437/1 



y OUNG 


Boy . 


YOUNG 


Isn't that nice. 


. - YOUNG 


(garble) TV is hanging right in there. 


Y GUN G 


(garble) is on the ground. 


■ ' - DUKE 


(garble) on the ground? 


YOUNG 


No, the EPB is, though. 


DUKE 


It's touching the ground? 


YOUNG 


Yeah . 


CAP COM 


And John, verify your information. 


YOUNG 


Oh, yeah. I got the MESA, excuse me. 


DUKE 


There goes the MESA. 


YOUNG 


I'll shake the (garble). It's at the 


bottom, Charlie. 




DUKE 


I s aw i t . 


YOUNG 


Are you okay? 


YOUNG 


Oh , boy . 


DUKE 


Hey, hurry up. 


YOUNG 


(garble) I'm hurry'n. 


YOUNG 


Okay . 


Y OUN G 


Hey, (garble) mysterious and unknown 


Descartes. (Garble) 


Apollo 16 is going to change your image. 


YOUNG 


I'm sure glad they got (garble). That's 


where it belongs. 




DUKE 


Okay, recorders off, (garble) utility 


powers are off, side 


1 panels are off. Here I come, babe. 


YOUNG 


Okay. Sit back and (garble) under the 


engine barrel. 




YOUNG 


I don't see any, oh, look at those beautiful 


rocks . 




YOUNG 


I don't see any particular -- we roped 


the probes off going straight down. 


YOUNG 


The probes standing straight up. 


YOUNG 


Okay, great. Oh, is this ever neat, Charlie. 


DUKE 


Ok ay , I'm out . 


YOUNG 


Don't come out till you see what we just 


passed o ve r . 




DUKE 


That was a big rock, I tell you. 


YOUNG 


No, that was a big hole. 


DUKE 


A hole, huh? 


YOUNG 


You ain't going to believe this. 


DUKE 


Okay, close the hatch. 


YOUNG 


Okay . (garble) . 


DUKE 


Okay, Tony, how far do you want me to close 


th e h a tch ? 




CAP COM 


Okay, just pull it snug, Charlie. 


YOUNG 


How do far do you want it closed about, Charlie 


DUKE 


What'd he say? 


Just pull it snug. 




YOUNG 


(garble) here. 


DUKE 


( garb le) . It is . 


DUKE 


Hot dog, is this great. 


CAP COM 


Sounds great. 



APOLLO 16 MISSION COMMENTARY CST 10:56 GET 119:14 437/2 



Look 
a 50 



ECB, 



DUKE You can see the -- you can the (garble). 

YOUNG No kidding, Charlie. 

DUKE You can see the shadows just great. Wow. 
at that landing. You know it's got a big rock maybe about 

centimeter rock with the right leg -- the left leg. 

YOUNG (garble). 

DUKE That was a slight miscalculation on the 



YOUNG Yeah. 

DUKE Fantastic. On this first foot on the 

lunar surface is super, Tony. Okay, Tony, we're making 
little footprints here about half inch deep -- not kicking up 
really very much. We're going to have to pull that MESA up, 
John, it is too low. 



the 



YOUNG 


Yeah , 


I kn ow it. 












DUKE 


Let ' s 


do that ( garble) , 










YOUNG 


Okay , 


let me get these 


b 1 an k e t s 


down . 


DUKE 


Okay . 














ORION 


Wow , 


is this ever 


s upe rb . 








YOUNG 


I'll 


p i ck it up . 












DUKE 


Ok ay . 














YOUNG 


N ow , 


where do you 


w an t 


it? 








YOUNG 


Ab ou t 


r i gh t he re ? 












YOUNG 


Wait 


a minute . Yo 


u got 


a -- 


losen 


this here 


g • 

DUKE 


I know i t . 












PAO 


The crew at the present 


time 


i s 


removing 


thermo blankets 


f r om 


the modular e 


qulpment s 


t o rag e 


as s emb ly . 


YOUNG 


Wait 


a minute, Charlie, 


let 


me 


get 


i t . 


DUKE 


Okay . 












DUKE 


(garble) is superb 












DUKE 


Go od 


Lord, look at 


that 


hole 


w e 


almos t 


e d in . 
















CAPCOM 


The MESA blanket. 


John , 


that 


yo 


u usually 



fold up and put away there, we'd like you to put 
TV until you use the TV. 

Roger. 

Get that thing, John? 
(garble) turn off, straight 
Wait until the (garble) comes up. 
Houston, how do you get this MESA 



it over the 



YOUNG 
DUKE 
DUKE 
YOUNG 
YOUNG 

thing up ? 
DUKE 

we can't get 
DUKE 

low case. 

CAPCOM 

it th e re . 



up ? 



Tony, we need to jack the MESA up 
the lock of f . 

The MESA is touching the ground. 



b 1 ank e t 



an d 



Bel ow 



You should be able to just pull up on 



APOLLO 16 MISSION COMMENTARY kllllll CST 10:56 GET 119:14 437/3 



YOUNG 
YOUNG 
YOUNG 
DUKE 
YOUNG 
MESA and let me 
DUKE 
YOUNG 
YOUNG 
cord. Pull down 
DUKE 
YOUNG 
DUKE 
Y OUNG 
DUKE 
YOUNG 
DUKE 
YOUNG 
DUKE 
YOUNG 
DUKE 
DUKE 
YOUNG 
l=t me see? 

DUKE Yeah- 
DUKE Tony 
black line. 

CAP COM 
YOUNG 
DUKE 
DUKE 
don ' t you see 

YOUNG 
s uppo s e to be 
YOUNG 
DUKE 
don't take -- 
it. Why don't you see if 
There you go. Keep going. 

PAO Charlie, 
be ab 1 e 



Ok ay . 

That's why I thought. 
Are you going to get in? 
(garble) the black strips, don 
Wait a minute, Charlie, get up 
pull this cord. 

I just did that, John. 
You're not pulling back, you 
Charlie, pull down that way. 



t you? 
on the 



re pulling. 
Tighten up 



the 



just pull in a straight line 



Right here? 
No, right -~ 
Okay . 

See what I'm talking about? 
Yeah . 

Don't fall down now. 

Looks like it's hung on the side here 
It's not working. 
Not y et . 

Well, the heck with it. 
Wait a minute. 
No, I can't get it. 
You want to move out of 



Le t ' s go on 



the way and 



you just pull straight up on the 



Why 



w as 



Why 
got 



We're checking on that. 
Some block, you have to 
I think so too. 
John, let's see if we 
if you can pick it up. 

Look at that red line 
at . 

Okay I'll pick up the 
Okay, let me see if I 
okay, I got it. Why don 



Ch arlie . 
re le as e , 



Charlie 



can do it with this 



on there where it 



MESA okay, 
can get this 
you — no 



thing — 
I' ve 



you can pull that (garble) 



you 



sho uld 
YOUNG 
DUKE 
YOUNG 
DUKE 
DUKE 
CAPCOM 



there should be a green 
to pull up on that'll lift it. 
Okay, Charlie, keep lifting. 
Is that enough? 
Keep going. 
Ok ay . 

Okay, we got it 
Outs t an ding . 



strap that 



That' s great, 
Tony . 



APOLLO 16 MISSION COMMENTARY i^l21/12 GST 10:56 GET 119:14 437/4 



YOUNG 
we'll put the 
us e it. 

YOUNG 

DUKE 

YOUNG 

DUKE 

YOUNG 

DUKE 

YOUNG 

DUKE 

DUKE 

YOUNG 



(garble) MESA blanket (garble). Okay, 
white blanket over there for such time when we 

How far is the LRV, Charlie? 
Don ' t know . 

We have to get our first antennas up. 

Okay, here. 

We don't need that. 

But I got to get it out of the way. 
Ok ay . 

Get this other stuff. See (garble) 
Yeah, I put your antenna up. 
Okay . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kjlim CST 11:06 GET 119:24 438/1 



partially out 



Okay I got clear flags 94 percent 

coo lin g . 

I got clear flags (garble). 
Well Houston here we are. 
Boy the old Arkaty Plans are 
there are rocks all over the 



at least 92 percent. 
Hey, Johnny, come on. 
85. 

Go get my antenna. 
Okay . 

Okay you're doubling 



DUKE 

CAP COM 
o J: you. 

DUKE 
3.8 — ment a 

YOUNG 

DUKE 

l:.t tie ( garble) . 
thing- Tell you, 
de: s crib ed . 

YOUNG 

DUKE 

YOUNG 

DUKE 

YOUNG 

CAP COM 
C:DR' s Imbrium. 

DUKE 

YOUNG 

DUKE 

YOUNG 

DUKE 

YOUNG 

DUKE 

DUKE 

saw that big hole 
YOUNG 
DUKE 

there's a within 3 
there's a hole, a crater, 
10 meters deep -- 5 meters maybe 
on the side. Okay, the drill is 
and it runs . 

CAPCOM 

YOUNG 

DUKE 

YOUNG 

CAPCOM 

YOUNG 

from the 



And we'd like the EMU check from both 



an d 



S leepy 

really some- 
place as we 



we didn't get the 



95 per cent. 
Do you see it 
Yes I s aw i t . 
Duck, Charlie, 
Sir . 
Duck . 

Ok ay thanks . 



Charlie? 



m 



to get the drill out. Man I never 



goxng 
right there. 

Yes that's the one I was telling you about. 

Tony, right behind the LM here, 

meters of a foot — (garble) foot pad 

-- there's a crater that is probably 

But 30 degrees for angles 



out- the drill is out 



from being 
big ho le . 

DUKE 

DUKE 

not p re- r e le as ed. 
YOUNG 
DUKE 

on that side also 



Very good. 
Charlie, I'm 
Okay, you be 
The (garble) 
Okay . 

Charlie, if I 
SIM bay here. 



off on the LRV. 
inspecting it. 
stems are out. 



I guess 



get 
I' 



m 



40 feet back 
going to fall 



to the 
■ M that 



Okay, you give me the table. 

Okay, antennas are all parallel. (Garble) 
(Garble) brake it. The (garble) are blocked 

Yes, how about that. Being the one -- 

Okay, Tony, the paint beneath the -- 
below the steerable antenna is peeled off just 



like 



APOLLO 16 MISSION COMMENTARY kll\lll CST 11:06 GET 119:24 438/2 



^UKE on the other side. I don't see anything 

wrong with the steerable, I guess it's just won't work. 
CAP COM Okay. 

DUKE Had to reset both sets of -- okay. 

CAPCOM. Charlie, we'll have some pictures for 

you to take in the steerable later, but we'll get that when 
you take your pen. 

DUKE Yes, I was planning on that. Okay, John, 

yes, the walking just takes time. 

YOUNG Yes, it takes both straps. 

DUKE Here, I'll help you on this other side. 

Man, it worked beautiful landing. I'm glad you weren't too -- 
Phew me, you were going for -- you were landing going for -- 

YOUNG That's what was worrying me. 

DUKE Okay, here's your strap over here, John. 

YOUNG Okay. 

DUKE Yes, look at that big rock under there, it 

looks like a vesicular basalt to me. The black one. 

DUKE Tony, the engine vail was about 6 inches 

off the ground and it's not crushed at all. 

CAPCOM Okay. 

YOUNG Awaywego. 

DUKE I'm going up towards Stoney. Get in the 

Ro ve r . 

The crew now getting ready to deploy the 
lunar roving vehicle. 

YOUNG I'll just run over here and grab this 

string, Charlie, and pull on it a little. Okay, both those 
(garble). On your spring up there, there's tension on it. 
right? 

DUKE Yes. 

YOUNG Okay, let's just make sure that I checked 

all these things . 

DUKE Okay. 

YOUNG 
3 or 4 (garble). 

DUKE 

latch is engaged. 

YOUNG Verify those one more time. 

DUKE (garble) Verify your outrigger cables 

(garble). Both of them okay, (garble) and back away from 
the deploy area. Okay Charlie. 

DUKE Ready. 

YOUNG Yes, here we go. (Garble) loose. The 

bottom pins released too. (Garble) 

PAO That's the back half of the Rover. 

CAPCOM Very good. 



Go to the left side of the front (garble) 
Depending which way the LM (garble) locking 



APOLLO 16 MISSION COMMENTARY CST 11:06 GET 119:24 438/3 



YOUNG (garble). 

DUKE (garble), Man it's great. Isn't this 

neat? 

YOUNG (garble) it's gotta be nice. 

DUKE Good or not this is like in the training 

building. Only thing we don't have, Tony, is the linoleum 
on our floors. 

Let's scratch the surface here Charlie. 
How we doing (garble) Charlie? 
(garble) wait a minute, 
(garble) pulling- 
Ok ay . 

Oh. This is much (garble) 
Than it was before. 
Don't pull so hard I guess. 
Can't believe that big hole back there, 
(garble) you picked up the exact bottom 



YOUNG 
CAP COM 
DUKE 
DUKE 
YOUNG 
YOUNG 
DUKE 
YOUNG 
YOUNG 
DUKE 

of this old crater. 

YOUNG 
here Charlie. 

DUKE Yes but anywhere else we would have landed 

t;e would have been on a great big slope. 

DUKE Okay there goes the front wheels. 

YOUNG And the back (garble) to (garble) chassis 

is released too, I think. — 

CAPCOM (garble). 

YOUNG the wheels didn't lock into place Charlie. 

We'll have to go up there and get the (garble). Push them 
up . 

Okay . 

Okay you hold that and let me run up and 



There weren't any flat places around 



DUKE 
YOUNG 

do th is . 

DUKE 
YOUNG 
CAPCOM 
YOUNG 

In Charlie? 
DUKE 
DUKE 



Okay . 

Now the wheels didn't lock, Houston. 
Okay we copy that. 

Here goes one. Charlie got one. Is it 



Yes it is . 

Okay. Then the (garble) pin — this 
[garble) pin isn't in either. 

YOUNG But we'll get that. 

DUKE Okay the -- 

YOUNG See if the other one is in, 

can ' t get it. 

DUKE Okay stop pull. 



See if you 



APOLLO 16 MISSION COMMENTARY k 11 GST 11:06 GET 119:24 438/4 



DUKE 


I illSt Wpnt Hnwn 1"n minTmiiTn nn tnxt 

^ j*-*^*- t_iuvvn L-L* Ul ^ i i X 111 LI ILL U 11 lUy 


cooling and it 


feels 3 lot" H*irt-*i'r 


YOUNG 


Ok av I'll frv that in a <^(^rTinA Hpt-p 


DUKE 


Can you get it to (garble). 


YOUNG 




DUKE 


Hev see what if diH Tf r\i Ar\ ^ \- 


look like to me 


it did. 


YOUNG 




Y OUN G 


j-ca. is tiitLing m sometning t 


Ch ar 1 ie . 


DUKE 


UK ay tnere ic is. 


YOUNG 






Wait a minute* 


Y OUNG 


Th is one is not in over here. 


DUKE 


"i-t; yuu t>ure; 


YO UN G 


Y fi Q 


DUKE 


Vgaroxey you just took: it out or this 


o ve r he re . — 




P AO 


vgcii-uj-fc:/ uiic xxne. 


DUKE 


f 2 a rb 1 e 1 


YOUNG 


But iitst rinn't' Tiin n-Ff Tj-it-li 

■t^UL. uuiL L- i.Llit UXJ. WXLIl XL 


Ch ar 1 i e . 




DUKE 


I'm not- OltflV tb"ic5 nnf^'c^ "in 


YOUNG 


Okay this one's in. 


DUKE 


Okay. Okay keep going. 


YOUNG 


Don't you want to pull, Charlie. 


DUKE 


No it says release pull (garble) will 


unlock and that' 


's what I did. (garble). 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k 111111 11:16CST 119:34GET 439/1 



after we 



CDR 
LMP 
CDR 
LMP 
CDR 
LMP 
anyway not 
CDR 
LMP 
CDR 
LMP 

nxnus y footpad, 

YOUNG 

DUKE 
Hill we get the 

YOUNG 

SPEAKER 

DUKE 

with this little 
Jo hn . 

YOUNG 
DUKE 
YOUNG 
DUKE 
YOUNG 
:. sn't locked. 
DUKE 
YOUNG 
DUKE 

Okay , n ow it is. 

YOUNG 

DUKE 

YOUNG 
back up here and 
11 i ce r here. 

DUKE 

YOUNG 
away from it 

DUKE 

YOUNG 
if it was possible 

DUKE 

YOUNG 

DUKE 

CAP COM 
we had the TV. 

YOUNG 
Sorry about that. 



Don't you want to - 
Release GARBLE and that's 
Okay, It just stepped out 
You know it was bouncing. 
Stepped out at 73 degrees. 
Those walking engines are 
get down to this point. 
GARBLE. 

Watch that big rock there, 



what I did. 
of GARBLE. 



no longer any good 



N ow , 



I see what yoTi mean, 



boulder right next to the 



50 centimeters 
an gular . 

It's really long - keep pulling. 
Yes, keep pulling till you hit the 
weight off of these things. 

You got to pull it away, Charlie. 
( Interference) 
(garble) pick it 
cable. Can you get 



up right off 
that - ok ay , 



(garb le ) 



the ground 
th a t ' s it 



Oh the cable 
Okay, that's 
Let ' s 
He re , 



is wrapped 
great, 
i t . 

you'll need this. 



go 



get 
I 



Wait a minute, that aerial (garble) 



We'll get that, 
I'll pull these 
Okay, this ones 
(garble ) 
Wooh . 

Watch out. 
I kn ow it. 
help you. Oh 



okay , you 
pins. 

not locked 



lo ck that side 



out here either. 



You'll turn the car over. 
Okay, Charlie, now I'll come 
boy, the color is so much 



Okay, here we go. 
Wait a minute, let 
( garb le ) 

You're doing pretty well 
Yes, I already picked up 



me get a little further 



with that. 

a rock to see 



Yes (garble) 
Ok ay . 

Well, are you 
We s ure are . 



copying all this? 
We ' re all e ars 



Sure wish 



Well, we'll get it for you in a minute 



APOLLO 16 MISSION COMMENTARY hll\lll CS T 11:16A GET 119:34 439/2 



YOUNG 
DUKE 

the ground. Hi ho 

YOUNG 
get the feel if I 

DUKE 

It's on the ground, 

CAP COM 

YOUNG 

SPEAKER 

YOUNG 
( garble) 

DUKE 
this baby up 

YOUNG 

DUKE 

YOUNG 
cables off 

DUKE 
your right 

YOUNG 

DUKE 

YOUNG 

DUKE 

YOUNG 

DUKE 

in the Sun, John, 
YOUNG 
DUKE 



within 2 feet of being on 



Sure is great. 
Okay , Rover is 
(garble) 

I believe we're a little up slope here. I 
let go it'll run under the vehicle. 

Yes, I do too. Okay, here we go, John. 
H ous t on • 
Okay . 

You want to start out Charlie, (garble) 
( Inte rf erence ) 



We want to be sure we've got 
There you go. 



e very th ing 
Le t ' s p i ck 



me get these 



foot - 



Outs tan ding , 
and turn it around. 
Ok ay . 

Boy look at that. 
Wait a minute, Charlie. Let 
the front of it. I forgot about them. 

You're all tangled up in that cord, John, 
your left foot. Oh, shucks. 

There it is, it's off. (garble) 
Pi ck her up . 
Here we go. 
We are up 
Mount FOB. 

Yes let's get around so you won't be looking 
I'm not looking into the sun. 



GARBLE. 
M o un t b an k 



is yours. There you 



YOUNG 

going to have a little tricky foot with that ALSEP. 
would you GARBLE propellant for? GARBLE push these 
GARBLE. 



go y o u re 

Ok ay , wh at 
through 



DUKE 
YOUNG 

Looks good. 
DUKE 

in times like 
CAP COM 
DUKE 
CAPCOM 
YOUNG 
DUKE 
YOUNG 
DUKE 
DUKE 
YOUNG 
DUKE 
YOUNG 

one out on 
DUKE 
YOUNG 



Ok ay , 
Well, 

Make s 



I'll get it 
you're fine 



th is 



I agree 
GARBLE, 
Ch arlie . 



there on that traverse, 
you proud to be an American, don't it 
with you Charlie. 



It 



right over here, sock it to me, 



It m 



if it's aire ady 



Don t p ush 
GARBLE. 
GARBLE. 

I can see it from here. 
I understand all the hinge pins 
They're jiggled in. 

There PQ's is out. To me I think 
your side, a little one. 

Both of them on my side. 
I'm pulling so hard. 



are m, 



there is 



APOLLO 16 MISSION COMMENTARY kllXlll CS T 11:16A GET 119:34 439/3 



DUKE 




Houston, I can pick up the whole vehicle 


with that piece 


of 


Velcro around it. 


YOUNG 




Me and Charlie just picked the vehicle up. 


CAP COM 




You just don't know your own strength. 


YOUNG ■ 




The people who put Velcro in don't know 


its strength, that 


's the message, Tony. Get your seat belts up. 


DUKE 




Okay, seat belt is up. 


YOUNG 




GARBLE. 


DUKE 




Going many miles, John, 


YOUNG 




You bet, is your GARBLE. Seat belt is up. 


locked. 






DUKE 




Hey, can you take it over there and brake it 


over so you won 


' t 


get all tangled up with two seat belts. 


YOUNG 




Take the other one too? 


DUKE 




No, this is yours. Now, I don't know what 


to think about 


that. 


DUKE 




Okay, we've got anchors to console. Okay, 


le t ' s che ck . 






YOUNG 




Okay, first thing, Charlie, I - 


DUKE 




GARBLE. GARBLE valve rotating 90. 


YOUNG 




Okay, rotate 90. 


DUKE 




Okay, bill up. 


YOUNG 




GARBLE. 


DUKE 




Heaters are coming out. Okay, we're moving 


the GARBLE. What' 


s that black thing over there? 


YOUNG 




Over where, Charlie? 


DUKE 




The back part of my seat, a couple of 


b lack thin gs . 






YOUNG 




What did you see? That GARBLE over there. 


YOUNG 




No. 


DUKE 




No, right square under your foot. 


YOUNG 




Doesn't matter but I just wonder what it 



was. Move off - GARBLE. Houston we just now found a little 



black thing. 

DUKE Little black GARBLE, it looked like GARBLE 

bumper guard something stowage area towing that means no- 
consequence. GARBLE doing things the wrong way. GARBLE. 
That crater. GARBLE. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hJll/11 CST 11:27 GET 119:44 440/1 



DUKE 
YOUNG 
DUKE 
YOUNG 

There's the 
DUKE 
YOUND 
DUKE 
t b el i eve 1 1 . 
CAP COM 
CAP COM 
there, you might 
we like. 

DUKE 
YOUNG 
DUKE 
putting 39. 



down there, valve closed. 



rest 



c an 



(Garble d) 

(Garbled) yours is 
Okay. Fenders up. 
Okay. CMA configures tripod 2, rover foot 
front hand pin. Near the front fender. Okay. 
Yea, I'm going to get the camera. 
Rog. 

The pan. YA-HOO, golly this is so great you 



Oh, I believe it, Charlie. 
When you get in the middle of 
call and I'll instruct 



give me a 

Ok ay . 

Ok ay . 
Ok ay. 



your pictures 
you on some more 



Need an LMP 
Break R. 
go to your right 



ch eckout . 



with the AGS and output 
my RD checkout. 



YOUNG Okay, Houston. I'm starting 

CAPCOM Okay, and Charlie 39. 

YOUNG Okay, and Charlie 39 . 

PAO This is Apollo Control. Based on the flight 

plan, the crew looks to be about 30 minutes away from getting the 
lunar communications relay unit in operations with the TV going. 



up 

we 



i t 
Z . 



YOUNG 
higher in 
made . 

CAPCOM 
DUKE 
20 meters 
I can ' t , 
CAPCOM 
YOUND 
YOUNG 



My personal impression is that I am 
this seat right now than I did in that 116 



s it tin g 
rig that 



I understand. 
Okay, Tony. Rover will 
behind between the minus Y the 
if I get right at the SIM bay. 
Okay, that - 
(Garbled) Houston. 
The AMP hours on number 



be about 60, 30 , make 
plus Y and the minus 
I'm in a big hole. 



are 



th e 



1 s ay 125 and AMP 
hours on number 2 are all still low, and the VOLTS on number 1 
VOLTS on number 2 are all still low. 
You haven't lost that battery. 

No it any reading if have it, we may have lost 
the forward and rear motor temperatures are 



the 
off 



85 and 

DUKE 

YOUNG 
- and of course 
still low and - 

DUKE 



YOUNG 

CAPCOM 
the ablated 

DUKE 
15 feet. 

CAPCOM 
250 of all 

DUKE 



p ain t , 



Okay, bands complete. 

And the battery temperatures are all still low 
Okay, and 
Ch ar lie . 

Okay, I'll do that. I'll do it SA at, at about 



we'd like you to take pictures of 



Okay, we'd like your update 
of the uplated surfaces. 

Okay. I can bend back that 



at 250, at Fll at 
f ar , Tony . 



APOLLO 16 MISSION COMMENTARY hllljll CST 11:27 GET 119:4^1 440/2 



the 



CAP COM 
YOUNG 
DUKE 
des cent 
YOUNG 
DUKE 
YOUNG 



Ok ay . 
(Garbled) 
Tony, you 



p 1 ume 



can see the striations caused by 
It's running, John. 

s go would you, 
all your steering 



Ro ger 
We ' 



It' 



Ah 



Ch arli e . 

It's gre at . 
this is going to be some kind of different 



ve got 



ri de 



V e 



DUKE 
CAP COM 
couple of 
DUKE 
CAP COM 



The rover is running, Houston. 

Okay, and when your over the S-band, we have 
more pictures of that one. 

I just got it Tony. 

Okay, there's a particular surface on it that 

in . 

Stand by. Okay, just a minute, 

s drive through a few of these little 



re interested 
DUKE 

YOUNG Let' 
craters here, Charlie. 

DUKE You know it's hard to get to where you are 

from h ere . 

DUKE Okay, the braided plain surfaces, there were 



on ly 2 , an d 

DUKE 
when you hit. 

CAP COM 
white side of 



it's the 2 above the aft-bed tank. 

John, you were coming absolutely straight down 
Okay, Tony, go ahead with the S-band. 

Okay, we want you to take a picture of the 
the yoke. The yoke has a black side and 



and white side . 
and Fll. 

DUKE 
CAP COM 
DUKE 
YOUNG 
DUKE 
YOUNG 
DUKE 
YOUNG 
DUKE 
YOUNG 
DUKE 
YOUNG 
DUKE 
YOUNG 
DUKE 
YOUNG 
DUKE 
YOUNG 
make any difference 
DUKE 



And on the white side we want at 



got the F8 and Fll. 



25Gth. F5 . 6 F8 
I'll do a 5.6, 



Charlie 



Okay , I ve 
Good show, 

John you sure drive slow. 
Yea, the wheels are skidding. 
Okay, your rear steerings off. 
What ? 

You don't have any rear steering. 
Is that what the problem is? 
Ye a. 

I thought you said both gears were working? 
It looked it to me, but it's not now. 



The OR's 
We don't 
Huh ? 
Shift it 



not working? 
have a b atte ry . 



to the other battery. 
How's it doing now? 

Nope. Front's working but the rear's not 
(garbled) We only go to primary. Does it 



N op e 



The rear steerings not working 



APOLLO 16 MISSION COMMENTARY GST 11:27 GET 119:44 440/3 



Okay. I want to park it anyway. I won't 
be able to steer it now. 

^^^E Say, could you - that's, that's good position. 

^U^E Okay, Tony. The rear steerlng's not working. 

CAPCOM Okay, we copy that. 

^^^^ Okay, Tony, the pans is complete. The struts 

of the LM just looks super. It's in perfect shape. No problems. 
The soil around here is very fine grain. Dusty, much like all 
the regulars that we've seen samples of from the other sites. The 
rocks are scattered perhaps 20 or 30 percent of the surface, and 
covered by boulders up to 25 centimeters. Small craters pocking 
up the whole place meter to 2 meter size, covering perhaps 70 percent 
of the s urf ace . 

YOUNG 
right here. 

DUKE Okay, I got the 

DUKE And. except for 

pretty good. 

YOUNG I don't understand that. 

Don't ask me to check if the rear compass has 
been pulled. Don't ask me to do that. No. That pin is still 
taped down for the rear steering. Okay, how far over the (garble) 

We can definitely see where we kicked up some 



Charlie, I won't be able to get navil line from 



LRD punch 
the lunar 



by the MESA, 
steering, it works 



DUKE 

dirt. 

YOUNG 

DUKE 
at a rock here 
beads and it's 

DUKE 
some variations 



Is this where all these patterns come, Charlie. 
Yea. You might give a word - oh, I'm looking 
that's got all kinds of dark glass in It, and 
got to be a breccia. Too many different kinds. Yes 
Hey, Tony. Looking at Stone Mountain. You see 
in it parallel to the local terrain, or to the 



normal surface, and they follow the contour lines and they might 
be, it looks to me it might be just some small ridges in it. They 
are scattered about. I say scattered about, that's not any good 
look like a couple of meters wide or so, in the 
and separation. 



at all. They 
same distance 

DUKE 

YOUNG 
shrunk . 

YOUNG 
of the OUB, here 

DUKE 
s t rength . 

YOUNG 



What is it, John? 

Pulled the top out of the MESA 

Okay, Houston. I'm kneeling. 



b 1 anket , i t 
The floor 



Got it. When (garble) didn't know his 
Let me get - 



own 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kllXlll CST 11:36 GET 119:54 441/1 



YOUNG (garble) Velcro didn't know his own 

SI t ren gth . 

DUKE Look at this blanket bag. 

YOUNG Okay, Houston, I'm going back to midway 

between intermediate and minimal. I was in minimal when I 
was driving the -- the old Rover and it seemed to be pretty good, 

YOUNG Look you dirty old (garble) you - you come 

out of he re . 

DUKE (garble) struggle. 

DUKE (garble) look at that bag clear away. 

YOUNG Outstanding'. 

DUKE I thought I wouldn't be able to do that 

one . 

YOUNG Okay, the UV camera is sitting in the 

Quad C pallet and it looks normal in every respect to me. 

DUKE We're going to see if we can get it out 

ot there. 

YOUNG ho, ho, ho. Look at that, Charlie. Look 

at the giant. 

DUKE We got it. 

YOUNG Look at me carry it. I'm carrying It 

over my shoulders. 

DUKE I guess we don't have to worry about dust 

getting on it. 

YOUNG Boy, 116 is the neatest environment you can 

::ind for this kind of work. 

YOUNG Okay, Charlie, I'm going to put right 

over here by the truck and before I could show it on my 
picture here and maybe you'll ride even with the bottom of the 
f: r uck . 

DUKE Okay, we'll just have to watch where we 

i:h row things . 

DUKE Oh, oh, oh, is that nice. 

YOUNG After we make connectors (garble). 

PAO This is Apollo Control, the crew now 

getting a lunar communications relay set up. It could be 
about 10 or 15 minutes until we've got television. 

YOUNG Okay. 

YOUNG Charlie? 

DUKE What? 

YOUNG Do you know where we have to put this 

con t r ac ti on ? 

DUKE By us right here. In front of my picture. 

YOUNG Okay, now, Charlie, if I stood parallel to 

the shadow, is that due west? 

CAPCOM That's close enough to due west. It'll 

be about 3 degrees off. 

YOUNG Well, I can -- I just set it 3 degrees 

some way or another. 

CAPCOM Okay, BIAS it north slightly. 



APOLLO 16 MISSION COMMENTARY hllXjll CST 11:36 GET 119:54 441/2 



Okay, a little bit 
Well, Tony, I tell 
order in that crummy connector 



more spark, 
you one thing, 
Ove r . 



that ' s 



Okay, Houston, the battery temperature 



DUKE 

Y OUNG 
the h ar de s t job 

^■^0 Based on the crew's description, we may 

have one of two batteries aboard the lunar roving vehicle 
which are not functioning but we're coming up with a test 
here at the Control Center to check that out. 

YOUNG 
is reading a 
a wonder the 

CAPCOM 

YOUNG 

CAP COM 

YOUNG 
the temperature 

CAPCOM 

DUKE 

YOUNG 

CAPCOM 



ve 



some new 
YOUNG 
DUKE 
YOUNG 
beauty pressurized, 
CAPCOM 
DUKE 
PAO 

feels perfectly 



100 degrees F which it was 
other one always reads. 

Okay, that sounds good. 
You got to send the battery 
That sounds good. 
The battery is going out in 
plate up. 

Do s t ay on . 
(garble) . 
( garble) . 

And John, when you get to the first setting. 



reading before — it 



out of here 



the sun with 



Tony 



suit 



settings for you. 

I thought you might have, 
(garble) . 

Hey, Tony, now that we have 
the suit just feels perfect. 
Good show. 

Shall we give credit to the tailor? 
That was Charlie Duke reporting that 
now that it's pressurized. 



this little 



his 



f i rs t 



DUKE 
(garble) the 
YOUNG 
CAPCOM 
work on the moon. 

YOUNG Okay, where we are, the locate antenna is 

coming in, on my checklist, Tony. Charlie, I forgot to pull in 
all the circuit breakers over there. Push it in. 



Everybody helped me get it fitted right 
time in the LM. 
Hey, your magnet still works, Houston. 
Now we got a data point magnet to 



DUKE 
YOUNG 
DUKE 

up to your knees. Isn't that 

YOUNG You know, 

one day. 

YOUNG 

DUKE 

DUKE 
like we — 
of them and 



All of the circuit breakers going in. 
Okay, that'll save us some trouble. 
Really can't believe you got that (garble) 



n i ce ? 
I was 



really worried about that 
(garble) 



(garble) some. 

Ah. Here's like in the training building 
Well, I mean the gear is working exactly 
and I'll tell you those guys is going to be doing 
Jerry Thorn and Bob (garble) and Cooper (barbie) 



all 



APOLLO 16 MISSION COMMENTARY hllllll CST 11:36 GET 119:54 441/3 



DUKE they were all (garble) but it's really 

paying off, I'll tell you, 

DUKE He's locating the connectors. 

DUKE (garble). 

DUKE Okay, (garble) or high gain. 

YOUNG That's what I thought. 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY k 12X111 11:46CST 120:04GET 442/1 



DUKE This is so easy. 

YOUNG GARBLE. 

^ John Young at this point is apparently setting 
up the ultraviolet camera while Charlie Duke is working on the 
lunar communications relay unit and more specifically the high 
gain antenna. 

°UKE Okay, low gain antenna, high gain antenna 

ins talle d. 

'^U^E Okay, John here comes a big man, Tony, I 

roched the first time. 

Outstanding, that's got to be a first. 
DUKE It is for me. 

'^OUNG Okay the old bubble burst so it's got the 

bubble right in the middle. 
CAP COM Okay. 

YOUNG Okay, GARBLE azimuth 14 and elevation 48 and 

say again what you want me to make it. 

CAPCOM Okay, we'd like to make the azimuth 98. 

DUKE 98? 

CAPCOM Right, we're changing targets. 

DUKE That ain't even close. 

DUKE Yeah, okay. 

CAPCOM And the elevation is 28. And watch the film 

advance as you turn the power on. 

YOUNG And turning it to azimuth just completely 

destroyed whatever level it had. 98 what now? 

CAPCOM 98 and 28. 

YOUNG 98 and 28. Okay. 

^UKE Well, Tony, you the old earth is boresighting 

into site . 

CAPCOM Outstanding. 

^UKE Roger, right on babe. I think. Hey, you've 

really got to bend back to see that beauty coming right over 
head. Okay. PD. 

That was Charlie Duke describing the view 
of earth which is virtually overhead. 

^UKE Okay Tony, I turned the power switch off when 

I started the power switch was on - I turned the power switch 
off on the TV. 

CAPCOM Okay. 

YOUNG Okay, Houston will you go where this bubble 

just broke off on one side or do you want to level it everytime. 
CAPCOM Is it off the case? 

YOUNG Yeah, it's off the case. 

CAPCOM Okay, That's just fine - as long as it's off th. 

cas e . 

YOUNG Okay. 



APOLLO 16 MISSION COMMENTARY h mill 11:46CST 120:04GET 4A2/2 



YOUNG 
first one is 

CAP COM 
advance as you 

YOUNG 

90, 
110 



to do on this 



Okay now, all you want me 
turn the power switch on, right? 

Right, power switch on and watch the 
come back - so you can tell us how many degrees 
Okay, it looked like it was better than 



film 



that's about all I can say about it - maybe 100 or 



Ok ay . 

Okay, you're 
Is that what 



Okay 
» . 



just leave it there 



at VHF. 
that is 



ah so. 



I can hear 



you. 



the 



Okay, I guess that tells us something about 



Right , 
GARBLE 



b ut 
I'm 



no ch an ge - 
sure Houston, 



I think 



the mode 
minute 



CAP COM 
YOUNG 
DUKE 
John . 
YOUNG 
camera operation. 
CAP COM 
YOUNG 

changed. Well, I don't know that'll probably be in a 
cr two - two and a quarter minute. Okay, I want to - 

DUKE Is this ever a neat operating environment, 

YOUNG Okay, Tony, I'm reading - my internal with 

S-band is 26, temp is 14 GARBLE is 22 over. 

YOUNG Oh, oh, oh, GARBLE Charlie. 

DUKE Yeah. Okay, over my head. Man that guy 

put on the velcro, really. 

YOUNG He gets paid double time, Charlie, 

DUKE I'll tell you - 

YOUNG For every strid. 

DUKE It's amazing. Hey Elsie all your blankets 

100 percent open. 
CAP COM Okay. 

GARBLE , 



that 



are 



DUKE 



Going to switch 
I'll be darn if 



YOUNG 
DUKE 

on like it was supposed to. 
got AC on the single string, 

DUKE 

CAP COM 

DUKE 

node switch 2 and 
power of the A to 
rection make that 

YOUNG 

DUKE 

PAO 

::eeding us a television picture 
They have now been on the lunar 
!3 min ute s . 



to tw o . 
the old 



GARBLE didn't 



re out ahead if 



go 
you 



Hey Tony you 
look at that. 
Getting a single, Tony? 
Ahjwe'reworkingit. 

Okay, you got 40 you got external in your 
the power is 2, correction, I didn't check the 



S - b an d . 
18. 

GARBLE. 
GARBLE. 
Ch arlie 



The power is 12, 14. Over. Cor- 



Duke is getting 
We should 
surface for 



ready to begin 
have that shortly, 
about 1 hour 



YOUNG 



Okay , it's going . 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY kll^lll CST 11:56A GET 120:14 443/1 
DUKE (garble) 

CAPCOM Stand by a second, Charlie. 

Okay, it's looking pretty good. Don't have a picture here 
in the room yet, but we're getting data. 

DUKE Okay, the dap is coming out. 

YOUNG Houston, as far as peeping around you guys 

would rather we'd be outside then inside wouldn't you? 

DUKE Okay, Tony, the camera - the TV camera 

is pointed right down at the ground, fore to the Rover. 

CAPCOM Hey, our comm just improved 900 per cent. 

That' s beautiful. 



PAO 


We're getting our communications now 


through the Lunar 


Communications relay unit, the suitcase 


size communications package that will be carried on the 


Rover, and we should be getting television shortly. 


DUKE 


Golly, look at that. Did you get the 


pan out, John? 


YOUNG 


Which one, Charlie? 


DUKE 


The one that you broke the wire on. 


YOUNG 


No, I haven't but I'll work it later. 


DUKE 


What is it to? 


YOUNG 


I don't know, (garble) I think it's to 


the (garble) 


YOUNG 


Man, I tell you, if my - if this - my 


Christmas stocking 


looked like this ETB, I'd be saved. 


DUKE 


Okay, magazine P, the X is in the middle. 


and the frame is lined up. 


CAPCOM 


Okay, magazine pop up. 


CAPCOM 


Hey, Charlie. Verify the TV power switch 


is on . 




DUKE 


S t an d by . 


YOUNG 


Got it Charlie. 


DUKE 


You mean the LM power switch or the one 


on the TCU? 




CAPCOM 


On the TCU. 


DUKE 


Okay, I'll shoot it to on, okay momentary 


on back to center. 


CAPCOM 


Okay. Hey, we got a picture. 


DUKE 


Yeh ! 


YOUNG 


Of the ground no doubt. 


CAP COM 


Of the ground. 


DUKE 


That's right. 


YOUNG 


That's nice clean ground. 


DUKE 


Okay, the camera is running, the 16 mm 


is running. 




CAP COM 


Out s t an ding . 


DUKE 


( garble) 



APOLLO 16 MISSION COMMENTARY kjl\]11 CST 11:56 GET 120:14 A43/2 



CAP COM 

DUKE 
but they mean 

YOUNG 
I really like 
Ok ay . 



( garble) 
This Mission 

s ome thing. 

Oh , is 

it. This is 



is full of firsts, (Garble) 



this easy 
about the 



to do. 
ne ate s t 



Th e re ' s 
thing I 



no gravity 
ever saw. 





DUKE 


eye. 






CAP COM 




YOUNG 




DUKE 


like 


I us ed to , 




YOUNG 




DUKE 




CAP COM 


c: olo r . 




DUKE 




CAP COM 




DUKE 



Hey, you're looking at me with the big 



Right, the big eye's on you, Charlie. 
Trying to see if you're nervous Charlie. 
Hey, can't just throw those bags over there 
they bounce into the dirt. 
Yes . 

How's the picture, Tony? 

A good picture. Beautiful, outstanding 



S up e r . 

You're in living color. 
Okay, I'm putting magazine bravo 



nagazine bravo is 
tried to blow off 
count number h. 

CAP COM 
times you blow off 

DUKE 

YOUNG 
Charlie . 

DUKE 

YOUNG 

DUKE 
so super, 
at all the 
again . 

YOUNG 

DUKE 

YOUNG 

YOUNG 
a cucumber, 

CAP COM 

PAO 
for about 1 
support systems 

DUKE 

YOUNG 

DUKE 
is really going 
I did. 

YOUNG 

DUKE 



going on the Commander's 



the dust, Tony, 

Okay, bravo 4 
th e dus t . 
Oh, it didn't 



an d its 



Okay, 
came ra , I j us t 
starting in frame 



and keep count of how many 
w o rk so - 

Well look, this thing says lock on it 

Okay, this goes to the other SEK. 
Charlie, this tells you what to do. 
How about that? A new first. This is 
Okay, 38 TDC 2 B6 and 500 under the seat. Look 
little goodies, oh, oh. No vercro, man did it 

Got you huh? 
Lo ok . 

Ah, come on (garble) loose. 
I tell you Houston, I'm just as cool as 
and this sun is so bright you can't believe it. 
Outs tan ding . 

They've been on the lunar surface now 
hour 16 minutes and both back pack portable life 
look good at this time. 

- The ETB into the Commanders seat. 
Hey, your vice is in Charlie. 
Super. John, I don't know if this 



to open 

No, 
How 



here, I can t get it wedged in 



film 
like 



I don ' t think - 
you read, John, 



you re cutting out, 



APOLLO 16 MISSION COMMENTARY hjll/ll GST 11:56A GET 120:14 443/3 



YOUNG 
mys elf . 

DUKE Oh, okay. 

YOUNG By golly, we did it again. 

DUKE What? 

YOUNG I would never have thought that on 

Moon, we'd run into each other right here at the seat, 
did at practice every time. 

DUKE Every time. 

CAPCOM Now you're consistent. 

YOUNG I have some timeline guide for you, 

this EVA 2 or 3 more times and I may get it down. The sun 
goes under your seat, maps going over in mine. 

Here comes the big eye, the 500. 
Oh, that's a clean dust patch, Houston 
going to last. 
That's the 4UV camera in the 
You can tell that the dust 
hangs in there pretty good, 
of the Rover to see the dust 



Loud and clear Charlie, I'm talking to 



the 
b ut 



do 



w e 



it's 



comp as s 

DUKE 
YOUNG 
I don ' t th ink 
PAO 

the frame right now 

YOUNG 
picked up the front 
latched. 

YOUNG 
Th ere it is . 

DUKE 

yes, the old duma flicky's got it 



mi ddle 
brush . 



of 



Okay. Okay Charlie, where 's 



brush is 
the rake? 



but 



Look up there under the duma flicky, 



Oh 



END OF TAPE 



APOLLO 16 MISSION COMMENTARY hjlljll CST 12:06 GET 120:24 444/1 



YOUNG Okay, Charlie. Where is the rake. There 
:L t is. 

DUKE It's up under the gimbal (garbled). 

DUKE back to the MESA. 

DUKE Okay. 

DUKE Sorry I blocked your picture there, Tony. 
YOUNG Oh, Fred-0 is to be con gradulate d for think- 
ing how to put this rake in. 

DUKE Yea, that's a new first. 

YOUNG Darn right. That's good stuff. Save us a lot 

of work later on. 

PAO That picture of John Young working at the 

luanr roving vehicle. 

YOUNG Okay, that's about the size of it. 

DUKE Audio maps. Which audio map do you want to 
look at, John. Just like training. The picture of Hadley Rile. 

I'm just teasing, Houston. 

YOUNG Looks like we're down some, I guess on the 

time line already. 

DUKE Are we. 

CAPCOM No, your right on the time line. 

YOUNG Well, we're pretty even. 

DUKE Okay. I thought we were moving along pretty 

good. 

YOUNG Sodidl. 

CAPCOM Your doing just fine. 

YOUNG You got the EPD up stowed? 

DUKE Yea, It's all done, John. Cameras are up. 

YOUNG Discard the crew pallet. Okay, your going 
to back, go inside. 

DUKE I've got to get the pallet out. 

CAPCOM Hey, Charlie, don't throw that pallet out, 

we'll hold it that for later. 

DUKE Okay. 

CAPCOM We'll get that at the end of the EVA- 
DUKE Super. 

CAPCOM And you can skip all the (garble) parts, 

go on after that. 

DUKE (garbled) Okay, the SRC's next. John, why 

don't you unpack the SRC. It's on the right side. 

YOUNG Okay, I'll get it. 

DUKE And I'll get the cords down and hooked up to 
my seat. 

PAO The SRC is one of two sample return containers 

or ro ck bo xes . 

YOUNG Yea, I just remembered. 

DUKE It's nothing . 



APOLLO 16 MISSION COMMENTARY kllXlll CST 12:06 GET 120:24 444/2 



me . 



YOUNG Nothing up there? 

DUKE Well the only reason we had to go in there, 

was stack tie her down. 

YOUNG Okay. 

^UKE Right, and we can get the other, the other 

stuff is just food and - 

YOUNG Yea, I'm fine. 

DUKE stuff like that. 

YOUNG I got that. I thought it was something on 
that order. One small step for Charlie is one giant leap for 
I'm looking dead level with him, with the table on the 

DUKE Maybe I did get it a little high. 

YOUNG Yea, I think. 

^UKE Okay, Tony. That pressy precision Young, 

was coming right straight down when he hit. We didn't move an 
inch on those foot pads. 

CAPCOM Very good, then would you verify that you 

got the sun shield on the TV camera. 

DUKE Not yet, we'll get it. 

CAPCOM Okay. 

DUKE That was going to be part of the pallet's 

stuff, I'll get it. I don't know whether John can reach it or 
not. 

YOUNG That was going to be part of taking it out 

to the table but we did skip that part. 

I^UKE Oh, that's right, you know we did. Gimbal 

clos ed . 

^OUNG There goes that shield thing that came off, 

DUKE What shield thing? 

YOUNG That thing down there. 

DUKE That's okay, 

YOUNG Make it hard to close the box later on. 

DUKE Guess what? 

YOUNG What Charlie. 

DUKE I can't reach the stuff. Look at me John. 

YOUNG Yea. 

DUKE Look at that. I just polevaulted off into 

the MESA to get that beauty. 

YOUNG Charlie, what did I do to the SRC. You've 

got that piece of paper on you. 

°UKE Okay, the SRC, it just says seal control cycle 

S CB to left hand tool carry. 
S YOUNG Okay. 

^U^E I droped the sun shield, John. I've got it. 

YOUNG filled with dirt? 

DUKE I can blow a little dust off, Tony. It didn't work 

CAPCOM Okay, that's 2. 



APOLLO 16 MISSION COMMETARY kllllll CST 12:06 GET 120:24 444/3 



p ut 



Best 



DUKE 


Okay, hold the camera there, Tony, and I'll 


the sun shield 


on . 


CAP COM 


Ok ay . 


DUKE 


Yea, it looks pretty good to me. 


CAP COM 


Outstanding here. 


DUKE 


It's on straight. How about you. Okay. 


YOUNG 


Ok ay . 


DUKE 


Hey, John. 


YOUNG 


C ah 1 e . 


DUKE 


B ox , 


YOUNG 


On there . 


DUKE 


Better keep those MESA blankets on this one. 


side closed. 


I, the sun's on this side of the MESA. 


YOUNG 


Hey, do you know how to deploy that thing. 


DUKE 


Wh at th i n g . 


YOUNG 


That critter. 


DUKE 


I'm going to get the control sample here. 


YOUNG 


Okay, I'll get the flag. 


DUKE 


Okay. And it works. You can spin it right 



up, John. Just like we started doing 
you're getting the flag, I'll go open 



In training. Okay, 
the ALSEP door. 



wh i le 



time 



YOUNG 

DUKE 
a terrible 

YOUNG 

DUKE 

YOUNG 

DUKE 

YOUNG 
a little -- 

PAO 

n ow . 

DUKE 

YOUNG 

DUKE 
is on , Ho us t on . 
the experiments 

CAP COM 

DUKE 

CAP COM 

DUKE 

CAP COM 

DUKE 

CAP COM 

YOUNG