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Day Four Part Two:
Lunar Orbit Insertion

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Day Five Part One:
Transfer to Lunar Module,
Revs Ten and Eleven

Apollo 16

Day Four Part Three: Descent Orbit Insertion, Revs Three to Nine

Corrected Transcript and Commentary Copyright © 2006 David Woods and Tim Brandt. All rights reserved.
Last updated: 2017-02-17

Start of Chapter


DOI Burn


Start of Rev 3


Acquisition of Signal and DOI Burn Report


Mapping and Pan Camera Pads


SIM Bay Deployment


Loss of Signal


Main B Undervolt


Start of Rev 2


Acquisition of Signal


Undervolt Discussion


Discussion of LMP Suit Problem


Discussion of Docking Latch Fault


TEI-12 and TEI-19 Pads


Flight Plan Amendments


Film Status Report


Loss of Signal


End of CM Transcript


End of Chapter


Public Affairs Officer: This is Apollo Control. We've now had loss of signal with Apollo 16. We'll be reacquiring the spacecraft 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 three 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 [313.7 by 107.6 kilometres] and the last velocity reading we got was 5,368 feet [1,636 metres] per second. We're now about nine 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.

078 28 58 Mattingly (onboard): Oh, man, if I could just get my sinuses to stay cleared!

078 29 06 Duke (onboard): No way.

078 29 08 Mattingly (onboard): I just - yours ought to clear out on the ground, don't they? It sure is a pain in the neck.

078 29 27 Mattingly (onboard): Okay, nothing's hanging around the overheads anywhere that we've stuck out and we forgot to pick up? This burn occur in daylight or -

078 29 44 Young (onboard): No. Dark.

078 29 45 Mattingly (onboard): Dark?

078 29 46 Duke (onboard): Here's a map.

078 29 48 Mattingly (onboard): Okay.

078 29 55 Duke (onboard): Boy, we'd use a lot of gas: 20,000 pounds' worth of fuel [garble].

078 30 03 Young (onboard): Huh? We used a lot, huh?

078 30 07 Duke (onboard): [garble] a lot.

078 30 08 Young (onboard): I hope so. Never get it out of lunar orbit unless you do [garble]. Jettison.

078 30 18 Mattingly (onboard): Some day someone's gonna explain to me why that was a rational decision, to not have a dump [garble].

078 30 35 Young (onboard): Rational, I think, decision, that's because we couldn't get the SPS to burn or RCS to burn.

078 30 52 Young (onboard): [garble].

078 31 43 Mattingly (onboard): Coming up on two minutes.

078 31 46 Young (onboard): Roger.

078 31 47 Mattingly (onboard): Two clocks that say it's two minutes.

078 32 03 Young (onboard): Right here's [garble].

078 32 05 Mattingly (onboard): I don't - how you can get the - don't know how to put a bias in.

078 32 08 Young (onboard): I don't either.

078 32 09 Mattingly (onboard): With this kind of a burn - 20 seconds - it can't be more than a couple of tenths ...

078 32 13 Young (onboard): Yeah.

078 32 14 Mattingly (onboard): ...plus the minute. So with a foot per second there - which might be significant -

078 32 19 Young (onboard): Yeah.

078 32 20 Mattingly (onboard): I don't know how to do that.

078 32 36 Young (onboard): You got Trans Control Power and all that stuff?

078 32 39 Mattingly (onboard): Comes on at - a minute. Okay. Okay, going to Normal, Trans Control Power, on. Delta-V Thrust A, coming on, no light.

078 32 57 Mattingly (onboard): Mark.

078 33 01 Young (onboard): Go ahead.

078 33 19 Mattingly (onboard): Okay, Average g is on. Okay, 18, 17, 16, ullage.

078 33 32 Young (onboard): You have it, Ken.

078 33 37 Mattingly (onboard): Attitude's good.

078 33 39 Young (onboard): Nine, 8, 7, 6, 5, Pro, Pro, 3, 2, 1 -

078 33 46 Young (onboard): Zero.

078 33 47 Duke (onboard): Okay, he's open.

078 33 48 Mattingly (onboard): Okay.

078 33 49 Duke (onboard): Okay, everything looks good. Helium Valves are open. Pressures are great. Past the 10 seconds.

078 34 02 Duke (onboard): Fifteen, 16, 17, 18, 19, 20, 21, 22, 23, 24 -

078 34 12 Duke (onboard): Auto shutdown.

078 34 14 Mattingly (onboard): I believe it was auto. Beautiful.

078 34 16 Duke (onboard): Twenty-four - about 24 [garble] ...

078 34 17 Mattingly (onboard): Okay, copy these numbers.

078 34 21 Young (onboard): 0.8, 0.2 ...

078 34 22 Mattingly (onboard): Okay, we had about - almost one of those before we started.

078 34 26 Young (onboard): 28, 210.6. Two, four balls, 8, and 210.6.

078 34 36 Duke (onboard): [garble] 210.6. Okay, go ahead.

078 34 42 Mattingly/Young (onboard): Plus 0.8...

078 34 43 Duke (onboard): Yeah.

078 34 44 Mattingly (onboard): ...plus 0, plus 0.1.

078 34 47 Duke (onboard): Okay. Go ahead.

078 34 49 Mattingly (onboard): Okay, wait a minute now. That's - Okay, that's - We're not gonna trim. That's close enough.

078 34 53 Duke (onboard): All right.

078 34 54 Mattingly (onboard): Okay, let's look it up. Verb 6, Noun 20, 1.21, 272.7 - Yeah. Yeah, 3.44. That's good.

078 35 12 Young (onboard): Got those numbers, Charlie?

078 35 15 Duke (onboard): No, I don't have them.

078 35 16 Mattingly/Young (onboard): 1.21 -

078 35 18 Young (onboard): 272.7...

078 35 19 Duke (onboard): Okay.

078 35 21 Young (onboard): ...3.44.

078 35 24 Duke (onboard): Okay, I'm ready on the gimbal motors.

078 35 25 Mattingly (onboard): Okay, [garble] Gimbal, Main B.

078 35 26 Duke (onboard): Go.

078 35 27 Mattingly (onboard): One.

078 35 28 Duke (onboard): It's off.

078 35 29 Mattingly (onboard): Two.

078 35 30 Duke (onboard): Off.

078 35 31 Mattingly (onboard): Main A.

078 35 32 Duke (onboard): Go ahead.

078 35 33 Mattingly (onboard): One.

078 35 34 Duke (onboard): Go ahead.

078 35 35 Mattingly (onboard): Two.

078 35 36 Duke (onboard): Both Off.

078 35 37 Mattingly (onboard): Servo Powers are Off.

078 35 38 Duke (onboard): Okay. Bit Rate, Low.

[Cease CM transcript]

078 48 Lunar Rev 3 begins]

Public Affairs Officer: This is Apollo Control at 79 hours, 6 minutes. We're about four and a half 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 [19 by 107 kilometres]. 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 [726 kilogrammes] lighter and traveling about 1,136 miles an hour slower [sic - correctly quoted as 136 miles(251 kilometres) per hour earlier]. The Descent Orbit Insertion maneuver 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 [64.1 metres per second], most of which would be retrograde, giving us the desired orbit of 58.5 by 10.3 nautical miles [108.3 by 19.1 kilometres]. And we've passed the time of acquisition had they not performed the burn.  All continues to be quiet. We're now three minutes away from the expected time of acquisition with a good Descent Orbit Insertion maneuver.

Public Affairs Officer: This is Apollo control. We should be coming up on acquisition of signal now. And network reports that we have AOS.

079 10 37 Young: Okay, Houston. Nominal burn; first - first DOI burn we ever had that was nominal.

079 10 44 Hartsfield: Roger. That's great news.

079 10 46 Young: At least in our training.

079 10 51 Hartsfield: Okay, we'll stand by for your burn report.

079 10 56 Duke: Okay, Henry. It feels like if we had - we're clipping the tops of the trees all through there - what it looks like. We got a burn report of a Delta-Tig, 0 [garble]. all we got was 24.4, plus two balls 06 - 2106 VGX. Trim attitude 001, 272, 003; so we did not trim. Residuals were plus 0.8, plus 0, plus 0.1; minus 2.3 Delta-VC; Fuel 337, Ox 346. Over.

079 11 42 Hartsfield: Roger, 16. Unbalanced?

079 11 48 Duke: Okay, it jumped up to 200 increase.

079 11 53 Hartsfield: Roger; copy.

079 11 56 Duke: It never really stabilized though, Hank.

079 11 59 Hartsfield: Okay.

079 12 10 Young: And a Verb 82, last look, thought we were at 10.9 [nautical miles - 20.1 kilometres] perigee.

079 12 15 Hartsfield: Roger. Copy 10.9.

079 12 24 Young: But I don't think it really knows. But the MSFN really knows.

Public Affairs Officer: 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. Readings 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 getting a reading here on the ground.

079 13 29 Duke: Houston, 16. it appeared to us that we got an auto shutdown.

079 13 34 Hartsfield: Roger, Charlie. Copy auto shutdown.

079 15 10 Young: You got any preliminary data, Houston?

079 15 14 Hartsfield: Roger, John. The doppler says stay; we're waiting on the short arc.

079 15 20 Young: Okay; thank you.

Public Affairs Officer: 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 two 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 six minutes from now. All indications, preliminary, 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 [35 kilometres] above the lunar surface, accounting for Charlie Duke's earlier comment that it appeared to be right down among the tree tops.

079 17 42 Hartsfield: Apollo 16, Houston. You're good on the short arc. You have a stay, and we show you 59 by 10.7.

079 17 53 Young: Roger; 59 by 10.7. Thank you, sir.

079 19 13 Hartsfield: 16, Houston. Can you - could you give us Auto on the High Gain?

079 19 21 Young: Roger. You have it.

079 20 04 Mattingly: Henry, if you remember that little real bright crater on the northern rim of Chaplygin that Stu and Farouk were talking about the other day, we - we happened to see it right up close to us as we came by on this orbit, and we got a couple of pics for you on it, and that really is an unusual little guy. And it's really beautiful.

079 20 29 Hartsfield: Roger; copy.

079 20 35 Mattingly: Probably getting carried away with all of this, but we've - we've got all kinds of things to see back there. It would really be nice to fly that kind of an orbit down low.

079 20 44 Hartsfield: Roger.

079 20 49 Mattingly: 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's beautiful. You can pick out little bitty features. They're just -they're just as clear. There's no fuzziness. And the telescope's the same way.

079 21 08 Hartsfield: Hey, that's great: We ought to be able to get some good use out of that.

Public Affairs Officer: This is Apollo Control. The landmark tracking Ken Mattingly is referring to is 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 [25.6 kilometres], continuing to drop down towards Pericynthion. And the preliminary tracking data, the flight dynamics officer reported, shows an orbit of 59 by 10.7 [nautical miles 109 by 19.8 kilometres]. 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 desired orbit of 58.5 by 10.3 nautical miles [108.3 by 19.1 kilometres].

079 23 11 Hartsfield: 16, Omni Delta.

079 26 17 Duke: 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 tracks all the way down.

079 26 37 Hartsfield: Roger; copy. Can you locate that one?

079 26 42 Duke: Wait a minute. No, I'm pretty lost right now. Let me see if I can figure it out.

079 27 11 Hartsfield: Ken, while you're maneuvering there, we'd like to ask what value did you put in your EMS, and what did you get on your EMS check?

079 28 28 Duke: Houston, 16. That crater I had, I think was in a series around Maclaurin, maybe a little bit further west than that.

079 28 41 Hartsfield: Roger; copy.

079 29 40 Duke: Hank, coming across the mare here, it reminds you of [garble] static system cals at Edwards.

079 29 49 Hartsfield: Roger. You're really down low, screaming across, huh?

079 30 24 Hartsfield: 16, Houston. Did you copy the question I had about the EMS Delta-V?

079 31 21 Duke: Houston, the Goclenius Rille looks like large grabens with very subdued sides to them; no outcrop at all apparent from my position.

079 31 36 Hartsfield: Roger; copy.

079 31 47 Duke: And looking on up into the Gutenberg Rilles you can see it cross - one crater just climbs right across the crater wall.

079 31 57 Hartsfield: Roger.

079 32 00 Duke: And that's Gutenberg Sea. That's Gutenberg Sea, Hank, and you can see the wall is down,dropped into the rille.

079 32 10 Hartsfield: Roger; copy. How do you read, Charlie?

079 32 15 Duke: I'm reading you five by.

079 32 19 Hartsfield: Okay. A littler earlier, I asked a question about the EMS Delta-V. Did you copy that?

079 32 25 Duke: Negative; we did not.

079 32 27 Hartsfield: Okay ...

079 32 28 Duke: It - it read minus 2.3.

079 32 29 Hartsfield: Roger. We had a question here as to how the EMS Delta-V check came out, and which value you loaded into the Delta-V counter?

079 32 41 Duke: Stand by.

079 32 44 Mattingly: Can I call you in a second on that, Hank?

079 32 45 Hartsfield: Sure thing.

079 32 47 Mattingly: It was like - it was like 1.8 at shutdown because of the drift in the EMS, and I did a check, and it came out to be normal and the bias was the same. I put in the Delta-VT, the same thing that we've used before, but then it looked to me like the bias was in - less than half a foot per second.

079 33 06 Hartsfield: Roger; copy. We were a little confused here because the - 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.

079 33 19 Mattingly: Roger. It was about 1.6 or something like that at shutdown. I'll have to look back at the Flight Plan.

079 33 30 Duke: Okay, Houston. The walls - the north wall of Capella has striations that are dipping eastward about 60 degrees or so, all the way across the north face.

079 33 46 Hartsfield: Roger. Copy, Charlie.

079 33 51 Duke: Okay, and also Isidorus, the same thing.

079 33 55 Hartsfield: Roger.

079 34 14 Hartsfield: J-2 should be on the horizon now, Ken.

079 34 19 Mattingly: Roger. 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.

079 36 09 Hartsfield: Ken, you're coming up on about 30 seconds to TCA.

079 36 22 Duke: He has the target, Houston.

079 36 26 Hartsfield: Roger.

079 38 54 Mattingly: Big old hill down the stream from - Where you are going [garble]?

079 39 02 Young: Guess who is sneaking in marks on Gator Crater right now?

079 39 07 Hartsfield: I wonder who.

Public Affairs Officer: Gator crater is about 700 yards across one of the craters 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.

079 40 26 Young: Now that's what I call OJT right there.

079 40 33 Hartsfield: How did the landing site look through the sextant?

079 40 45 Young: You have to do that with the telescope, Hank.

079 40 48 Hartsfield: Roger.

079 41 11 Duke: I think that was the best high-speed pass I've ever made.

079 41 15 Hartsfield: Roger.

079 42 42 Hartsfield: 16, Houston. I have your Map[ping] and Pan Camera photo PADs for 80:35 whenever you're ready.

079 43 06 Mattingly: Okay, Henry; go ahead.

079 43 09 Hartsfield: Roger. T-start, 080:38:01; T-stop, 080:46:04. And that same PAD is good for the Pan Camera.

079 43 32 Mattingly: Okay. T-start, 080:38:01; T-stop, 080:46:04.

079 43 40 Hartsfield: Good readback.

079 43 42 Mattingly: That'll be the same PAD for both cameras.

079 44 04 Hartsfield: 16, Houston. We'd like for you to go on and get in the SIM bay attitude so we can get our DSE dump.

079 44 13 Mattingly: Wilco.

079 44 51 Mattingly: Hey, Hank, you want me to go ahead and do this Single Jet Authority, or use couples to go to the attitude?

079 44 59 Hartsfield: Stand by.

079 45 10 Hartsfield: Ken, why don't you go ahead and go coupled, then we can go Single Jet.

079 45 15 Mattingly: Okay. Sounds like a good plan.

079 47 11 Hartsfield: 16, Omni Charlie.

079 47 58 Mattingly: Hark, would you check on one thing for me? Would you find out if this method I've been using for reading out the maneuver times, Verb 4 Noun 1, is in any way affected by or affects the use of Program 509?

079 48 14 Hartsfield: Will do, Ken.

079 48 18 Mattingly: 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 - I wasn't paying much attention.

079 48 33 Hartsfield: Stand by, Ken. I think they got your answer awhile ago and it satisfied them, but I'll make sure.

079 48 40 Mattingly: Okay. I wasn't paying a lot of attention; I was trying to pick up that landmark.

079 48 46 Hartsfield: Do you have any comments on the landmark tracking? Did it all go smoothly?

079 48 52 Mattingly: Well, except for the fact that those optics are perfect, that's really neat. The target area did not look as I anticipated. It's a - I think it's a function of the low Sun angle, but it looked to me like there were far more rims around the craters than - than what - the impression I had from looking at things on the - on the models. And I did not pick up North or South Ray; they still 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.

079 49 30 Hartsfield: Roger; copy.

079 49 32 Mattingly: It's still - still a problem in scaling when you look at something like that, until you're sure that you have the right feel for it. But I think it's pretty obvious, and I think picking it up tomorrow will be relatively easy.

079 50 45 Hartsfield: 16, Houston. Could you bring up the High Gain, Pitch plus 35, Yaw 290.

079 51 02 Mattingly: Say again your Yaw number.

079 51 03 Hartsfield: Roger; 290.

079 51 36 Hartsfield: And, Ken, there's no problem in ...

079 51 40 Mattingly: Okay, Hank, and we're about - Go ahead, Hank.

079 51 44 Hartsfield: Roger. They say there is no problem in calculating maneuver completion time, and - and it does not interfere with 509.

079 51 55 Mattingly: Okay, thank you. I've been avoiding using that. All right. We're about ready to go through our solar monitor and tiedown release. You folks ready for us to do that?

079 52 12 Hartsfield: Roger. We're ready to go, Ken.

079 52 18 Mattingly: Okay.

079 54 23 Mattingly: Okay, Houston. We released the tiedowns and the door and heard just a very tiny little sound on each of those activities.

079 54 33 Hartsfield: Roger. We copy, Ken.

079 55 11 Mattingly: Hank, another piece of questionable data that've collected today is - well, on our low pass on the back side there, we got our color wheel out. And we have two votes for Number 17, and one vote for Number 13.

079 55 28 Hartsfield: Roger; copy.

079 55 30 Mattingly: And that's over on the back side just past Chaplygin. And Number 17 really isn't quite right; it's just the closest thing we have. And the same comment applies to Number 13.

079 55 41 Young: Well, I still say 13 was right on.

079 55 46 Mattingly: You'll never guess who voted for 13.

079 55 52 Young: The grits have affected his vision.

079 55 56 Hartsfield: That's probably what it is, John.

079 56 00 Young: Right.

079 56 11 Duke: Hey, Hank, ask Stu who he believes.

079 56 15 Hartsfield: Will do.

079 59 40 Mattingly: Okay, Hank. We have a SIM bay jett configuration, and I'm going to start deploying equipment.

079 59 46 Hartsfield: Roger; copy.

080 02 01 Hartsfield: Ken, you want to keep us posted on what you're doing there with the switches?

080 02 07 Mattingly: Okay. I got the Mapping Camera Door Opens and the Alpha Cover Door Open, and the Mapping Camera's going out. And we've just gone through one minute of extend time, and I'm timing the first one.

080 02 17 Hartsfield: Roger; copy.

080 02 19 Mattingly: I'll do the Gamma Ray and Mass Spec booms sequentially afterwards, so I can pay attention to the times.

080 02 30 Mattingly: Okay. And I've got gray on the Mapping Camera, Extend, and that was at one minute and 20 seconds.

080 02 37 Hartsfield: Roger; copy.

080 02 57 Mattingly: Okay. Can you read me on vox, Henry?

080 03 00 Hartsfield: Roger.

080 03 03 Mattingly: Okay. That's the way we'll operate. I'm going to the Gamma Ray, Deploys at this time. I'm going to hold it for barber pole plus two seconds, then Off. Going to Deploy. Deploy. Barber pole now, 1, 2, Off; and it' s gray. Gamma Ray is coming to Retract.

080 03 27 Mattingly: Mark. Barber pole, and it's gray. Okay. Going to the Mass Spectrometer. Deploy.

080 03 42 Mattingly: Mark. Barber pole, 1, 2, Off. Mass Spec to Retract.

080 03 48 Mattingly: Mark. Barber pole, Off. Okay. They're both in the Retract position, and everything looks normal. The X-Ray is coming On.

080 04 00 Mattingly: Mark. 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.

080 04 15 Hartsfield: Roger; go ahead.

080 04 27 Mattingly: Okay; it's Deploy on the Mass Spec, and I'm timing it.

080 05 18 Hartsfield: Give us Auto on the High Gain, 16.

080 05 21 Mattingly: Five seconds to stop. Okay, it's Off on the Mass Spectrometer, and you have Auto.

080 05 38 Mattingly: Okay, Hank. You've got the Mass Spec out to 8.4 feet.

080 05 43 Hartsfield: Roger; looks good down here.

080 05 45 Mattingly: Laser Altimeter is coming On.

080 05 49 Mattingly: Mark.

080 06 02 Mattingly: And can I go ahead and put the Mass Spec Experiment On without waiting the three or four minutes?

080 06 07 Hartsfield: Stand by. Roger. Go ahead.

080 06 16 Mattingly: Okay. Mass Spectrometer Experiment is coming On.

080 06 22 Mattingly: Mark. The Ion Source is going to Standby.

080 06 29 Mattingly: Mark it.

080 09 04 Mattingly: Can you tell how the Laser is doing yet, Hank?

080 09 09 Hartsfield: Stand by, Ken. We'll take a look. Laser looks good, Ken.

080 09 21 Mattingly: Outstanding.

Public Affairs Officer: This is Apollo Control at 80 hours, 12 minutes. 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 [108.5 by 18.3 kilometres] 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 Mass Spectrometer on 25 foot [7.6 metre] and 24 foot [7.3 metre] 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 [2.6 metres] 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...

080 14 12 Hartsfield: Apollo 16, Houston. We're about two minutes from LOS.

080 14 18 Duke: All righty. See you in a little while.

080 14 21 Hartsfield: Roger. Over.

Public Affairs Officer: The Mass Spectrometer detects such things as tile volatile products 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 functioning 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 [1.8 metres] 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 its third revolution. We'll be reacquiring - reestablishing radio contact at the beginning of the fourth revolution in about 45 minutes.

080 15 58 Duke: Houston, 16. Do you read?

080 15 59 Hartsfield: Roger.

080 16 04 Duke: Okay, Hank. I'm up with the biomed. Take a quick look at it.

080 16 09 Hartsfield: Looks good.

080 16 15 Duke: Okay. Since we are gonna put on our LCG's tonight, I don't bit - put on the [garble].

080 32 17 Young (onboard): [garble]?

080 32 20 Mattingly (onboard): Pan Camera, Standby; Stereo.

080 32 32 Duke (onboard): [garble]

080 32 33 Mattingly (onboard): And Power. Let's see. The V/H Override is not on.

080 32 50 Mattingly (onboard): Mapping Camera's Image Motion is coming - On -

080 32 57 Mattingly (onboard): Mark. Barber pole. And it's gray. Image Motion is On.

080 33 12 Duke (onboard): [Garble] keep talking [garble]?

080 33 14 Mattingly (onboard): Yes [garble]. That way if they get any unusual things in their signaling. Man, they sure need a timer over here. 38:01.

080 33 30 Young (onboard): [Garble]

080 33 31 Mattingly (onboard): No, sir. I'll take care of that. Thank you. Do you need to get in here?

080 33 39 Duke (onboard): Wanted to get a spoon is all.

080 33 42 Mattingly (onboard): No (laughter). Thank you. That timer is only good for telling me to not forget something. Huh? Yeah. That was so I wouldn't get hung up and forget to do what I'm doing.

080 34 26 Young (onboard): [Garble]

080 34 27 Mattingly (onboard): Okay. Man, that's gonna [garble] a crick in my neck before this is over.

080 35 28 Duke (onboard): Hey, you want some [garble] turkey?

080 35 30 Mattingly (onboard): (Laughter)

080 37 04 Mattingly (onboard): Mapping Camera is coming On -

080 37 07 Mattingly (onboard): Mark. Then that goes - Well, let's see, I'll come back and catch the Pan Camera, Operate.

080 37 34 Mattingly (onboard): Okay.

080 37 54 Duke (onboard): Want me to take that stuff up for you, John?

080 38 05 Mattingly (onboard): Talkback is gray. Pan Camera is operating. Holy smokes!

080 38 11 Young (onboard): What is it?

080 38 21 Mattingly (onboard): Okay. Main B Undervolt; turning the Pan Camera back to Standby.

080 38 27 Young (onboard): [Garble].

080 38 29 Duke (onboard): No.

080 38 31 Mattingly (onboard): Okay, I'm [garble].

080 38 33 Duke (onboard): Okay. That did it.

080 38 34 Mattingly (onboard): What's that?

080 38 35 Duke (onboard): The Mapping Camera.

080 38 36 Mattingly (onboard): Pan Camera.

080 38 37 Duke (onboard): Pan Camera.

080 38 38 Mattingly (onboard): Yeah. Okay. Okay. Let's see if I can reiterate what happened. As soon as I turned it on, we got an Undervolt. Didn't happen to see how much it was ?

080 38 57 Duke (onboard): Yeah; 25-1/2.

080 39 00 Mattingly (onboard): 25-1/2 volts?

080 39 04 Duke (onboard): We're what? 26 - 27-1/2 now.

080 39 06 Young (onboard): Seven.

080 39 10 Mattingly (onboard): That was Main B that gave us the Undervolt?

080 39 12 Duke (onboard): Yeah.

080 39 14 Mattingly (onboard): Oh, darn.

080 39 16 Duke (onboard): [Garble].

080 39 47 Mattingly (onboard): We still at 25½, Charlie?

080 39 48 Duke (onboard): Huh?

080 39 49 Mattingly (onboard): 25½?

080 39 50 Duke (onboard): Yeah.

080 40 00 Duke (onboard): [Garble] about to eat the chocolate bar, huh?

080 40 10 Mattingly (onboard): Mmm-hmm.

080 40 20 Mattingly (onboard): We will for that one.

080 40 24 Duke (onboard): You want to try it again, Ken, and let me watch it?

080 40 26 Mattingly (onboard): No.

080 40 27 Duke (onboard): [Garble]

080 40 31 Mattingly (onboard): Oh, I don't really think there's any future in that.

080 40 44 Young (onboard): Make sure the ground doesn't want to try it either.

080 40 48 Mattingly (onboard): [Garble].

080 40 51 Duke (onboard): [Garble].

080 40 52 Mattingly (onboard): Pan Camera.

080 40 56 Young (onboard): Pan Camera?

080 40 57 Mattingly (onboard): Yep. Yeah, but the Pan Camera's on Main A.

080 41 07 Young (onboard): Well -

080 41 12 Duke (onboard): [Garble]

080 41 13 Mattingly (onboard): Nope. Any conclusion they come to would be guessing anyhow. I suspect that Main B is running a little bit lower than Main A and they probably both got pulled down. You didn't happen to notice [garble]? I'm sure you didn't. I wouldn't have.

080 41 33 Young (onboard): No. All I saw was MA.

080 41 47 Mattingly (onboard): Let's see. We're running 38 - almost 40 on Fuel Cell 3; 24 and 22. That's 32, 64 - 100 amps. That 's a shame.

[Begin Lunar Rev 4 at 080 42]

080 42 34 Mattingly (onboard): Main Bus B Undervolt; 27 volts? I don't understand that. Must have been a ...

080 42 44 Duke (onboard): Did you get another one?

080 42 45 Mattingly (onboard): Yeah.

080 42 46 Duke (onboard): Huh?

080 42 47 Mattingly (onboard): Yeah.

080 42 48 Young (onboard): For what?

080 42 49 Mattingly (onboard): (Laughter) Well, John, I don't know what from. It's on 27 - 26-1/2 volts. Main A is on 27-1/2. Fuel Cell 3 ...

080 42 58 Young (onboard): Fuel cells falling apart?

080 42 59 Mattingly (onboard): No, I think they're running - normal. It's only pulling 37 amps. Now it's something - just cycle it up to 40 amps.

080 43 12 Young (onboard): What's [garble] fuel cell? Check [garble]?

080 43 15 Mattingly (onboard): That's running about right. It must have been sitting right on the - I got some heater load on there. Main B. Those radiators couldn't be cycling, could they?

080 43 28 Young (onboard): [Garble].

080 43 31 Mattingly (onboard): No. What's the radiator outlet temperature? 25 - No, they're not on.

080 43 37 Young (onboard): [Garble]

080 43 55 Mattingly (onboard): Oh, shoot.

080 43 56 Duke (onboard): We've got 28 volts now.

080 43 58 Mattingly (onboard): Yep.

080 44 00 Young (onboard): What else did you shut off?

080 44 03 Mattingly (onboard): Nothing [garble].

080 44 15 Mattingly (onboard): Well, we aren't running the thing.

080 44 19 Duke (onboard): Check the ...

080 44 20 Mattingly (onboard): Check the pressures on that.

080 44 21 Duke (onboard): [Garble]

080 44 24 Mattingly (onboard): Yeah, they're getting a pretty good spread there.

080 44 40 Young (onboard): That's strange.

080 44 49 Mattingly (onboard): I think there's something wrong with that oxygen regulator. The flows in that thing are very unstable.

080 44 57 Young (onboard): Fuel Cell 3?

080 44 58 Duke (onboard): Yeah.

080 45 00 Mattingly (onboard): Well - You know, I guess it really isn't bouncing that much more than the others. It's just that there's a bigger delta flow between the oxygen and the hydrogen here.

080 45 11 Young (onboard): Charlie, can you hand me my - my spoon out of my temporary stowage bag over there?

080 45 25 Mattingly (onboard): Pressures all look normal?

080 45 27 Duke (onboard): Regs look okay.

080 45 28 Mattingly (onboard): Okay. Well, we've got high bit rate data on all this. They can take a look.

080 45 37 Duke (onboard): Pressure's good.

080 45 57 Duke (onboard): [Garble] all right? Okay?

080 45 59 Mattingly (onboard): Okay.

080 46 00 Young (onboard): Cryo 1 [garble] pressures are okay. Beats me [garble].

080 46 45 Mattingly (onboard): Mapping Camera coming to Standby - Off. Image Motion is Off. Laser Altimeter is Off. Mapping Camera - Got a barber pole on Image Motion, and the Laser is Off. Mapping Camera's going to Retract.

080 47 08 Young (onboard): Pan Camera shouldn't have anything to do with it, should it?

080 47 11 Mattingly (onboard): Mark. And a barber pole on the Retract, the Mapping Camera.

080 47 18 Young (onboard): I thought that stuff was on Main B...

080 47 20 Mattingly (onboard): They're split.

080 47 21 Young (onboard): ... Service Module/AC Power?

080 47 23 Mattingly (onboard): Yeah?

080 47 24 Young (onboard): I mean Service Module/AC Power is off of Main B, because ...

080 47 28 Mattingly (onboard): It's half and half.

080 47 29 Young (onboard): Is it half and half? Because...

080 47 30 Mattingly (onboard): (Laughter)

080 47 31 Young (onboard): Well, the reason I said so - the reason I thought it was - I mean - because I was reading the schematic somewhere and I thought you could lose - that they're in series and the fact that, if you lost this thing, it would cost you your B servo.

080 47 52 Mattingly (onboard): Okay. I'm going to have to climb over where you are, John, for just a minute.

080 48 00 Young (onboard): Charlie, you need to shift.

080 48 03 Duke (onboard): You want me to climb out of here? Where you want to go?

080 48 07 Young (onboard): I don't know. Ken's got to be over here, and he's got to be over there.

080 48 10 Mattingly (onboard): Golly, there's some of those flows that go up the sides of walls.

080 48 15 Duke (onboard): Okay.

080 48 16 Young (onboard): Get the Pan Camera [garble].

080 48 34 Duke (onboard): Pan Camera on now?

080 48 35 Mattingly (onboard): No.

080 48 44 Mattingly (onboard): Well, now. Guess who's got their next - next failure. A Mapping Camera that's out - to stay.

080 48 59 Mattingly (onboard): (Laughter) I figured it would break, but I thought it would last more than one extension.

080 49 16 Mattingly (onboard): There's 2 minutes and it hasn't come in.

080 49 19 Young (onboard): How long's it supposed to take?

080 49 21 Mattingly (onboard): A minute and a half.

080 49 34 Mattingly (onboard): Hey, John, can you - let me in there?

080 50 10 Mattingly (onboard): Is that - barber pole still on the Mapping Camera?

080 50 14 Duke (onboard): No, Ken, it's back in.

080 50 15 Mattingly (onboard): Back to gray?

080 50 16 Duke (onboard): Yeah.

080 50 17 Mattingly (onboard): Okay. It must have taken about - three minutes.

080 50 29 Mattingly (onboard): Watch the stick. I got it activated.

080 51 31 Mattingly (onboard): What's that 401 say? [garble].

080 51 39 Duke (onboard): [Garble].

080 54 14 Young (onboard): [Garble] in here [garble].

080 54 23 Mattingly (onboard): You brute. Gol-dang-it. That thing went in before. There we go.

080 54 29 Young (onboard): [Garble].

080 54 49 Young (onboard): That [garble] like it should be?

080 55 51 Mattingly (onboard): I thought I put [garble] Ok, no, I did.

080 55 56 Young (onboard): Okay [garble].

080 56 00 Mattingly (onboard): What's that?

080 56 01 Young (onboard): [Garble].

080 56 02 Mattingly (onboard): That'd never happen.

080 56 09 Young (onboard): You told me to put it back, so I did.

080 56 11 Duke (onboard): It's right there.

080 56 15 Young (onboard): Ha! Would you believe [garble]?

080 56 17 Duke (onboard): What?

080 56 20 Young (onboard): [Garble]

080 56 23 Duke (onboard): How long are [garble]?

080 56 28 Young (onboard): I don't know. [garble] there. You only have [garble] then you gonna get that Main B Undervolt coming out on the front side [garble]

080 56 40 Duke (onboard): Right now.

080 57 00 Mattingly (onboard): Gol-dang-it. Once again. Didn't give me any pan. Set the High Gain at 0 and 170?

080 57 47 Mattingly (onboard): You say you'd set your [garble]?

080 57 49 Duke (onboard): [garble]

080 57 50 Mattingly (onboard): Okay. That's Manual and Wide.

080 57 52 Duke (onboard): Okay.

080 58 00 Mattingly (onboard): Okay. How about Mapping Camera/Laser Altimeter Cover to Close? Let's see, verify that that Mapping Camera Retract barber pole is off and that the switch is in the Retract position.

080 58 17 Duke (onboard): Yeah.

080 58 19 Mattingly (onboard): Okay.

080 58 20 Duke (onboard): Mapping Camera/Laser Altimeter to Close?

080 58 22 Mattingly (onboard): Yes, sir.

080 58 23 Duke (onboard): The cover?

080 58 24 Mattingly (onboard): Yep.

080 58 25 Duke (onboard): Close.

080 58 26 Mattingly (onboard): Barber pole? Back to gray?

080 58 28 Duke (onboard): Yeah. It was so fast I didn't [garble].

080 58 31 Mattingly (onboard): Okay.

080 58 42 Mattingly (onboard): When am I going to eat?

080 58 48 Duke (onboard): [garble].

080 58 49 Mattingly (onboard): No, go ahead and finish your ...

080 58 50 Young (onboard): Tell me what you want...

080 58 51 Mattingly (onboard): ...finish your cleanup.

080 58 52 Young (onboard): ...and then I'll finish it up for you.

080 58 53 Mattingly (onboard): No, go ahead and finish whatever you've got to do to get ready for tomorrow because the next thing I'm going to have to do is go to bed.

080 58 57 Duke (onboard): [Garble].

080 59 04 Mattingly (onboard): Okay.

080 59 05 Duke (onboard): [Garble].

080 59 06 Mattingly (onboard): Yeah.

080 59 11 Young (onboard): That's how we figured these - Where those water bags at, Charlie? We ought to fill those, right?

080 59 23 Duke (onboard): [Garble] exact [garble].

080 59 27 Young (onboard): Okay. Where are the [garble] ...

080 59 30 Mattingly (onboard): Is this ...

080 59 31 Duke (onboard): Back there towards the end ...

080 59 32 Mattingly (onboard): ...is this John's chow?

080 59 33 Duke (onboard): [Garble].

080 59 34 Mattingly (onboard): That's mine, too? In addition to this?

080 59 35 Duke (onboard): No, no, wait a minute [garble]. Couldn't [garble] chicken stew.

080 59 39 Young (onboard): You want a wet pack? You sure?

080 59 41 Mattingly (onboard): This.

080 59 42 Young (onboard): All right. That's mine.

080 59 43 Mattingly (onboard): That yours?

080 59 44 Young (onboard): [Garble].

080 59 46 Mattingly (onboard): Yeah.

081 00 00 Mattingly (onboard): Oh, oh. Let me. Let me do some more things here. This ain't going to work (laughter).

081 00 12 Young (onboard): Yeah. Well, it's too old (laughter).

081 00 16 Duke (onboard): This is downright dry!

081 00 18 Young (onboard): What do you want me to do?

081 00 19 Mattingly (onboard): Well, I...

081 00 20 Young (onboard): ...[Garble] Panel 230.

081 00 21 Mattingly (onboard): There ain't no way to have an eat period in all this, isn't it?

081 00 24 Young (onboard): Looks like you can't have an eat period and see what's on the Flight Plan because you're gonna have [garble].

081 00 30 Mattingly (onboard): Yeah. Except this is the first time to move the boom, and I'd like to move it. But I got to have the Flight Plan to see what time - Go ahead and finish your menu. No, it's on the other page.

081 00 51 Young (onboard): [Garble]

081 00 53 Mattingly (onboard): Mass Spec and Gamma Ray to Deploy. Okay. Go ahead. Finish your Flight Plan.

081 01 07 Mattingly (onboard): Okay. There's a barber pole on the Gamma Ray Boom.

081 01 22 Mattingly (onboard): And the Mass Spec was running - 15 seconds after that one.

081 01 28 Young (onboard): [Garble]

081 01 39 Mattingly (onboard): Okay. Thank you, sir.

081 01 49 Duke (onboard): Well, John, you want to put on the LTV - LCG [garble]?

081 01 53 Young (onboard): Yeah. After a bit - soon as I defecate [garble].

081 02 12 Mattingly (onboard): Okay [garble]. 1, 2 -

081 02 25 Mattingly (onboard): Stir up.

[CM transcript ends until 082:31:39]

Public Affairs Officer: This is Apollo Control at 81 hours, four 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 nine 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 [108.5 by 19.6 kilometres] as a result of that Descent Orbit Insertion maneuver. We're about ten seconds now from regaining radio contact. We've had Acquisition Of Signal.

081 06 01 Hartsfield: Apollo 16, Houston.

081 07 22 Hartsfield: Apollo 16, Houston. How do you read?

081 07 29 Young: You're five by, Hank.

081 07 31 Hartsfield: Roger. Our data down here we worked on during the back side shows you're in 58.8 by 10.6.

081 07 46 Young: Okay. And while - while we were on the back side, we had a couple of Main B Undervolt lights.

081 07 55 Hartsfield: Roger. Copy. You want to tell us about it?

081 08 03 Young: Stand by. Yeah, it was when Ken was - messing around with the SIM bay, and he'll fill you in.

081 08 11 Hartsfield: Okay.

081 08 14 Mattingly: Yeah, we got a little behind on this sequence already, Hank. But as soon as I turned the - had the Mapping on and it worked fine, I turned the Pan Camera on, and as soon as I went to Operate on the Pan Camera, we got a Main B Undervolt. So I turned it back to Standby 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 Undervolt at some five minutes or so later, and it again was momentary. By the time we looked at it, it all looked pretty normal. The only - We checked the fuel cell regulator pressures. They looked good, and I really don't have any idea what might of caused it.

081 09 02 Hartsfield: Yeah. All the things we could check look okay.

081 09 06 Duke: Hank, we got a - it might not even be a small anomaly, but Fuel Cell 3, the H2 flow's running a little bit higher than the O2 flow, but the regulator pressure looks fine to me. But the other two fuel cells, H2 and O2, match.

081 09 24 Hartsfield: Roger. We copy, Charlie.

081 10 13 Young: My guess is when you dump the DSE the whole story will be right on there probably.

081 10 17 Hartsfield: Okay [garble]. John.

081 10 23 Young: When you get the DSE translated, probably tell you what happened.

081 10 25 Hartsfield: Roger. We copy.

081 11 07 Mattingly: Hank, you really can see both the Mass Spec and the Gamma Ray booms deployed.

081 11 Hartsfield: Roger. Understand you can see them both.

081 11 14 Mattingly: That's affirmative. Looks like a couple of feet of the boom is about all you can see.

081 11 28 Hartsfield: You've really got us puzzled with this undervolt now, because the Pan Camera runs off from Main A.,

081 11 44 Mattingly: Yeah, we'd noticed the same thing. It - 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 even let you think about it before I [garble] anymore.

081 11 52 Duke: Possible that it doesn't have any connection.

081 11 53 Hartsfield: Roger.

081 12 09 Mattingly: I still have the power on it, Hank. I've got it in Standby and Power on.

081 12 15 Hartsfield: Roger. Copy. And, Ken, I'd like to verify - is your- Nonessential Bus on Main A or Main B?

081 12 28 Mattingly: That's Main A.

081 12 30 Hartsfield: Roger.

081 13 03 Duke: 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 by in the morning.

081 13 14 Hartsfield: That is affirmative.

081 13 20 Duke: Okay. Anybody thought any more about my suit?

081 13 26 Hartsfield: 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.

081 13 39 Duke: Like if we can't get it zipped.

081 14 07 Young: Okay. Can we use my pliers on it to pull the zipper closed?

081 14 53 Young: Houston. Houston, 16. Do you read? Over.

081 14 55 Hartsfield: Roger. Reading you 5 by 5, John. Go ahead.

081 15 03 Young: 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 two. 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 the UCD bulk in there, the suit is going to be farther apart than it was - yesterday.

081 16 03 Hartsfield: 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 - he had a lot of trouble too, but on the Moon in one-sixth 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?

081 16 30 Young: Got me there. It looked like he was arched as much as he usually is.

081 16 46 Young: But you're saying that if I can't do it in - in zero g, we go on down to the Moon and try it in one-sixth g?

081 17 00 Hartsfield: Roger. That sounds pretty good, John. We - we did look at a backup procedure here, but it's a long - looks like a long thing and involves using a needle and pulling things together like you're sewing.

081 17 43 Duke: Okay, Hank. I think to give us every benefit of the doubt that I will not - I don't plan to wear the - the FCS probably tomorrow, and I'll just use the LCG and UCD.

081 18 07 Hartsfield: Roger. Understand, and could you give us Auto on - the high gain.

081 18 16 Duke: There you go.

081 19 28 Duke: Hank, also we would like to get permission to fill the drink bags tonight to save a few minutes also, if you think that's gonna be all right.

081 19 43 Hartsfield: Roger. That - Go ahead and do that, Charlie.

081 19 48 Duke: All right.

081 20 31 Hartsfield: Ken, we can't find any connection between the Pan Camera and Main Bus A, and we were wondering - Main Bus B, and we were wondering if, when you got the second momentary one - undervolt - were you moving any switches at that time?

081 20 49 Mattingly: That's negative.

081 21 13 Mattingly: They were both momentary Main Bus undervolts.

081 21 24 Hartsfield: Roger. The - the first one was momentary also?

081 21 31 Mattingly: It - it could be, or it could be that the sensor 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 [garble] it to operate for a second and back off - go ahead and use a couple of frames just to let you watch it.

081 21 54 Hartsfield: Stand by, Ken.

081 23 29 Duke: Houston, 16.

081 23 30 Hartsfield: Go ahead.

081 23 34 Duke: Is Tom satisfied with his Glycol Evap Out? We've got off scale, high here.

081 23 59 Hartsfield: Stand by. Stand by a minute, Charlie.

081 24 21 Hartsfield: 16, Houston. You're [garble] is at the top of the scale. You're still okay. You should now monitor Rad Out.

081 24 32 Duke: A Rad Out is 75.

081 24 36 Hartsfield: Roger.

081 28 17 Hartsfield: 16, Houston. Talked with the suit people, and they don't want you using the pliers on the zippers.

081 28 31 Young: I just used it to get a better grip with, not to pull the zipper, just to pull with.

081 28 54 Hartsfield: Their concern is over side load, John. They're afraid for you to use the pliers.

081 29 06 Young: Okay.

081 29 34 Hartsfield: Ken, Houston. We would like to talk to you a minute about this docking latch, if you're free.

081 29 45 Mattingly: Go ahead.

081 29 48 Hartsfield: 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 let me 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 want - would like for you to open the orange LM umbilical connector cover and inspect the roller pawl. The roller pawl, we hope, is engaged in the detent, but we would like to find out if it's in the detent, or is it free, or sticking up, and you can do that by looking in the side of the latch after you remove that umbilical connector cover. Is there any question on that?

081 30 38 Mattingly: Yeah. I'm not sure I know what you're looking for.

081 30 42 Hartsfield: Okay, when you look in the side there ...

081 30 45 Mattingly: ...I'm not at all sure what the roller pawl is.

081 30 46 Hartsfield: Okay, the roller pawl is on the far left side of the latch, behind and above the Auxiliary Release Button. And it can be identified by the roller on the tip of the pawl. The pawl is just a little arm that sticks out, and it's got a little roller on the end of it that rides on the cam that has these detents in it.

081 31 05 Mattingly: Okay.

081 31 08 Mattingly: Do you want to do this before we unlock it?

081 31 12 Hartsfield: That's affirmative. And it best be done 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 side of the latch, we would like you to look in the right side in there and at the bungee bell crank mechanism, and see if there's any foreign-object damage or anything wedged up in there.

081 31 51 Mattingly: When you say remove the cover - do you mean physically remove it from the spacecraft, or just open it up and look underneath it?

081 31 57 Hartsfield: Just open it up and look under there, Ken. And this is mainly - these two steps is just an inspection. We'd just like to verify the condition of the roller pawl 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 gonna 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 gonna 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 there inboard approximately 16 degrees. 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 inboard about 16 degrees, and the hook should stay there. And then you just proceed with normal undocking.

081 33 20 Mattingly: Okay. So the kind of thing you want me to look for are information only. Is that affirmative?

081 33 27 Hartsfield: Right. It would help the guys down here to try to understand what - 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 necessary, 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 hook back.

081 34 20 Mattingly: Okay. I just wanted to keep in mind what it was I needed if the time gets crowded.

081 34 26 Hartsfield: Roger. The only this is - 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 you have any questions on any of that?

081 34 48 Mattingly: Ah, Hank, we just [garble].

081 34 54 Mattingly: 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 mean.

081 35 01 Hartsfield: Okay.

081 35 12 Duke: Hank, as we came up towards the landing site, in that terrain - the general terrain to the east of us appears to me to be frothy vesicular-looking type terrain, real [garble] looking at this scale. Over.

081 35 33 Hartsfield: Roger. We copy, Charlie.

081 35 38 Duke: I'd say that was the Descartes. It has that appearance to it to me.

081 35 45 Hartsfield: Roger.

081 35 51 Duke: And do you have this LM DAP load for us and TEI?

081 35 57 Hartsfield: Roger. We're working on those PADs now.

081 36 13 Hartsfield: Charlie, we'd like to get a Bat B charge going.

081 36 22 Duke: Okay, Bat B charge going on.

081 36 39 Duke: Bat B is charging.

081 37 16 Hartsfield: 16, Houston. I have your TEI-12, 19 block data.

081 37 27 Duke: Okay, stand by.

081 37 59 Duke: Okay. Go ahead.

081 38 04 Hartsfield: Okay. TEI-12, SPS/G&N; 39817; plus 0.61, plus 1.19, 097:45:53.09; plus 3163.2, plus 1040.3, minus 0234.6; 181, 080, 020. Rest of the PAD is NA. The set stars are the same as for DOI. Won't reuse unless you want. Ullage; two jets, 17 seconds. Other remarks: burn undock, assumes no circ. Longitude of Moon at Tig, minus 171.47. Landing site REFSMMAT.

081 39 49 Duke: Roger. TEI-12, SPS/G&N; 39817; plus 0.61, plus 1.19, 097:45:53.09; plus 3163.2, plus 1040.3, minus 0234.6; 181, 080, 020; NA; Sirius and Rigel; and information is same as DOI, two jets, 17 seconds; burn undock, assumes no circ; longitude of Moon at Tig minus 171.47; landing site REFSMMAT.

081 40 23 Hartsfield: Good readback. And are you ready for TEI-19?

081 40 31 Duke: You speak.

081 40 33 Hartsfield: Roger. TEI-19, SPS/G&N; 39445; plus 0.61, plus 1.15; 111:31:49.81; plus 2909.4, plus 0785.3, minus 0224.0; 181, 100, 017; Set stars same as DOI, two jets, 17 seconds. Other: burn undocked, assumes circ LM to Moon at Tig minus 160.09. End of Pad. If you'll give us Accept, we're ready to uplink.

081 42 06 Duke: Roger. You have it. And readback TEI-19, SPS/G&N; 39445; plus 0.61, 1.15; 111:31:49.81; plus, 2909.4, plus 0785.3, minus 0224.0; 181, 100, 017. Sirius and Rigel; two jets, 17 seconds; burn undock, assume circ; LM to at Tig minus 166.09.

081 42 38 Hartsfield: That was 160.09.

081 42 46 Duke: Roger.

081 43 15 Mattingly: Henry, can I assume that the Mission Timer is in sufficient sync and that we don't need to do any updates there and that the REFSMMAT is good as is?

081 43 28 Hartsfield: That's affirmative.

081 43 32 Mattingly: Thank you, sir.

081 43 46 Young: Have you got the LM DAP stuff, Hank?

081 43 50 Hartsfield: Roger. We've got it and we're up-linking now and we're also loading your EMP 509 and I have your DAP, if you're ready to copy.

081 44 01 Duke: Go ahead.

081 44 02 Hartsfield: Correction on that. It's not 509; it's the jet monitor. Okay, LM DAP. LM weight, 36673; CSM weight, 39329. Checklist: DPS gimbal trims are good; no trim required.

081 44 28 Duke: Roger. Reading 36673, 39329, and the gimbals are good as is.

081 44 38 Hartsfield: A good readback, Charlie. I have a change to your LM Timeline Book on Page 1.

081 44 52 Duke: Stand by. Is it the Timeline or Activation?

081 44 55 Hartsfield: Timeline Book.

081 45 09 Hartsfield: It's a change to your undocking attitude, Charlie. It says Timeline Book.

081 45 20 Duke: Okay - okay, just had to get it out. Go ahead, Page 1.

081 45 26 Hartsfield: Okay, change undocking attitude to 0, 284, 064.

081 45 43 Hartsfield: The reason for this is because of the docking index angle ...

081 45 45 Duke: Roger; 0, 280 [garble] - Roger; 0, 284, 064.

081 45 54 Hartsfield: Roger. That's because of your docking index angle of minus 3-1/2 degrees.

081 46 01 Duke: Copy.

081 46 07 Hartsfield: And I have some Flight Plan changes for you.

081 47 07 Hartsfield: Apollo 16, Houston. We'd like to verify the position of the O2 Tank 50-Watt Heaters on Panel 226.

081 47 17 Duke: They are open.

081 47 19 Hartsfield: Roger. Copy. They're open.

081 47 45 Hartsfield: Charlie, are you ready to copy the Flight Plan changes?

081 47 52 Mattingly: What kind of Flight Plan, LM or CSM type?

081 47 54 Hartsfield: Roger. They're CSM, if you want to get them, Ken, they're for tomorrow's activities.

081 48 04 Mattingly: Okay, I'm ready.

081 48 06 Hartsfield: Okay, the first one is at 96:34.

081 48 23 Mattingly: Go ahead.

081 48 24 Hartsfield: Okay, there's a Verb 48 there. Change R-1 to read "10102."

081 48 40 Mattingly: Okay, "10102" for Verb 48, R-1 at 96:34.

081 48 45 Hartsfield: That's correct. At 96:39, write in "Load EMP 509; leave on through gimbal drive check for circ."

081 49 23 Mattingly: Okay, at 39, "Load 509 and leave through circ gimbal drive check."

081 49 29 Hartsfield: That's correct. The next change is at 97:15.

081 49 37 Mattingly: Go.

081 49 38 Hartsfield: Delete the Verb 48.

081 49 49 Mattingly: Okay, deleted the Verb 48 at 97:15; and that's because we'd already set it; affirmative?

081 49 55 Hartsfield: That's affirmative. And that also prevents you from activating that Saturn DAP. Okay, at 97:44, right after - right be - prior to the Verb 49 maneuver there, put in "Load DAP, Verb 48 (10101)(X1111)."

081 50 40 Mattingly: Okay. You want to "Load Verb 48 (10101) and (X1111)." After the circ burn and ahead of the Verb 49 maneuver.

081 50 51 Hartsfield: That's affirmative and, Ken, the computer's yours; the E-memory program's loaded.

081 50 58 Mattingly: All right, sir; thank you.

081 51 01 Hartsfield: Okay, next change is at 98:32. Prior to the comm check there, put "Load EMP 509."

081 51 22 Hartsfield: [Garble].

081 51 23 Mattingly: Okay, prior to comm check, "Load 509."

081 51 26 Hartsfield: Roger. And down about 98:44 after P00, add "Terminate EMP 509, after the P24 is complete."

081 51 50 Mattingly: Okay, I'll terminate 509 between P00 and loading Verb 48.

081 51 56 Hartsfield: Roger. The next change is at 100 hours 32 minutes, "Load EMP 509."

081 52 14 Mattingly: Okay, at about 100:32, "Load 509."

081 52 18 Hartsfield: Roger. And about 100:43, "Terminate EMP 509, after P24 complete."

081 52 41 Mattingly: Okay, will terminate 509 after P24.

081 52 46 Hartsfield: Okay, Ken, that's it on the Flight Plan changes, I hate to bring this up again, but they've got a change here for your SPS burn cue card.

081 53 02 Mattingly: All right. What might that be?

081 53 06 Hartsfield: Well, we had this - starting this thing 20 minutes early before so that we could help you prior to LOS and we're convinced that you don't really need Tape that much time, and what we think you ought to do is get the gimbal drive test started - you know, the Main Buses on about eight minutes early rather than six minutes. So the change is to - where we had you 40 minutes or minus 20 minutes is to change that to 52 and minus eight.

081 53 41 Mattingly: Okay. Do I dare use my ink pen this time?

081 53 45 Hartsfield: I hope it's good for the rest of the burns now, if we change that to 52 minutes and minus eight minutes.

081 53 56 Mattingly: Okay, that's no sweat. Thank you.

081 53 59 Hartsfield: Okay, and the next one'll become 41 minutes and minus - Correction, 53 minutes and minus seven.

081 54 10 Mattingly: Okay, 53 and minus seven and 52 and minus eight.

081 54 15 Hartsfield: 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.

081 54 35 Mattingly: Okay, would you settle for minus eight, so I can just leave it where it is?

081 54 39 Hartsfield: Roger; that's good enough. Just do it there and delete it from the back - back side of the card.

081 54 47 Mattingly: Okay, we'll do that.

081 55 31 Mattingly: 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?

081 55 44 Hartsfield: Are you talking about the Oxidizer pressure, Ken?

081 55 50 Mattingly: No, sir; the manual Temp In and the glycol loop.

081 55 53 Hartsfield: Oh, that - EECOM advises that looks pretty good now.

081 56 01 Mattingly: Okay, is it going to get too cold on the - on the dark side?

081 56 13 Hartsfield: Stand by a minute.

081 56 32 Hartsfield: Ken, EECOM says that the present setting should keep you in good shape.

081 57 06 Mattingly: Hank, I guess I'd - I would like to run it cooler to get the cockpit a little cooler, if that isn't going to cause any other problems.

081 57 19 Hartsfield: Stand by a minute, Ken.

081 58 28 Hartsfield: Casper, Houston. We'd like to get the Pan Camera turned off.

081 58 34 Mattingly: Okay, you just want to take - turn the power off, huh?

081 58 39 Hartsfield: Roger, we were trying to look at - run it, but we got pretty high loads on the spacecraft now, and we're getting close to LOS and there's not going to be time to exercise it.

081 58 52 Mattingly: Okay, we'll just turn it off then.

081 59 16 Mattingly: Okay, Hank, we've got the Pan Camera Power, Off.

081 59 20 Hartsfield: Roger, Ken. And did you happen to notice the retract time on the Mapping Camera.

081 59 27 Mattingly: Yes, sir. I meant to get that in. That was - I thought it was excessive. In fact, I thought it had maybe stuck. It was about three minutes.

081 59 38 Hartsfield: Roger; we copy.

081 59 55 Mattingly: And, Hank, I got some - some film status to give you, if you're ready for that.

082 00 02 Hartsfield: Stand by.

082 00 12 Hartsfield: Go ahead.

082 00 17 Mattingly: Say again.

082 00 19 Hartsfield: I'm ready to copy, Ken.

082 00 25 Mattingly: Okay. On Magazine Victor, we're up to frame number 8; Sierra Sierra, frame number 13; Tango Tango, 04. November November, 36.

082 00 49 Hartsfield: Roger; copy. Victor, 8; Sierra Sierra, 13; Tango Tango, 04; November November, 36.

082 01 00 Mattingly: That's correct, sir.

082 04 01 Hartsfield: 16, Houston. To more evenly distribute the - the electrical loads when you get on the back side after LOS, we'd like you to take Telcom Group 2 to AC1.

082 04 17 Mattingly: Okay, Telcom Group 2 to AC1.

082 04 22 Hartsfield: Roger; that's after LOS. And in regard to the Mixing Valve, you can adjust that for an Evap Out temperature of 49 degrees, and you ought to be okay.

082 04 37 Mattingly: Okay, is that 49 degrees the coldest temperature? Or just how did you -

082 04 46 Hartsfield: If you adjust it right now to an Evap Out of 49 ...

082 04 51 Mattingly: Okay, okay. Right now for 49.

082 06 07 Hartsfield: Apollo 16, Houston. We'd like to get an E-Mod, if we can.

082 06 27 Duke: On the way.

082 06 29 Hartsfield: Roger.

082 06 54 Hartsfield: And 16, Houston. Make sure you get the comm set up right in your presleep checklist here, or INCO says they won't be able to command the thing right and we'll have to wake you up next time.

082 07 11 Mattingly: Say again, Hank.

082 07 15 Hartsfield: Roger. They're admonishing me to tell you to be sure you follow the checklist on setting up the comm presleep.

082 07 27 Mattingly: Roger. We'll do that.

082 08 24 Hartsfield: Apollo 16, Houston. We're about two minutes from LOS.

Public Affairs Officer: 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 three major items covered. I'll try to run through those three, and summarize what to us appeared to be the major points. On first reacquiring contact, John Young reported that they had seen two 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 two Main Buses 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, however, showed no indication of a problem with any of the electrical 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. 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 activities. If this is, in fact, the case, it can easily be remedied by transferring some of the load to Main Bus A - a simple re-configuration. And that appears to be the most likely cause of the Main Bus undervoltages, 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 [sic - it was actually Charlie Duke himself that had experienced the problems] 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[ed] 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 gravity 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 determine which of these is the case, Mattingly was given a series of procedures to follow, of which we 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 three of the 12 latches are required for a firm hard docking, there is no particular concern that it will in any way effect the docking 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 [108.7 by 19.3 kilometres]. At 82 hours, 19 minutes into the flight of Apollo 16, this is Apollo Control, Houston.

082 31 39 Mattingly (onboard): [Garble] (laughter) [garble].

082 31 46 Crew (onboard): (Sneeze)

082 31 49 Duke (onboard): [Garble] wash your hands [garble].

082 31 53 Mattingly (onboard): Hey, you lick your fingers.

082 31 59 Crew (onboard): [Garble].

082 32 01 Mattingly (onboard): Yeah, if we could [garble] try it.

082 32 25 Mattingly (onboard): Looking out that window makes you think you're rotating instead of flying.

082 32 27 Duke (onboard): [Garble].

082 32 29 Mattingly (onboard): [Garble] going like this. Yeah. I keep looking back at the eight ball to see.

082 32 42 Duke (onboard): [Garble].

082 32 44 Mattingly (onboard): No. No.

082 33 23 Mattingly (onboard): Oh! I didn't check that - that comm.

082 34 00 Mattingly (onboard): How about hitting Telcom, Group 2, AC1?

082 34 04 Crew (onboard): [Garble].

082 34 06 Mattingly (onboard): Yeah.

082 34 07 Crew (onboard): [Garble].

082 34 09 Mattingly (onboard): [Garble] telecom groups. [Garble] balance buses.

082 34 23 Mattingly (onboard): Yeah. We're in the attitude I'll be in for - six days. Yep.

082 34 34 Crew (onboard): [Garble].

082 34 35 Mattingly (onboard): Oh, yeah, you can turn it on and look the other way around. Even the real craters turn inside and out on me sometimes [garble].

082 35 11 Duke (onboard): [Garble].

082 35 13 Mattingly (onboard): No, but you may have some. (Laughter) The last thing I want you to do, Charlie, is to return the toothpaste.

082 35 23 Crew (onboard): (Laughter)

082 35 25 Mattingly (onboard): You may have that - and my tissues - on a nonreturn basis.

082 35 44 Mattingly (onboard): I'll get the tissues out if that's what you want.

082 35 55 Mattingly (onboard): (Laughter)

082 36 14 Mattingly (onboard): Get out of there, you son of a gun. Can you move? Get my...

082 36 21 Duke (onboard): [Garble].

082 36 22 Mattingly (onboard): Huh?

082 36 23 Duke (onboard): [Garble].

082 36 25 Mattingly (onboard): Well, you said you wanted some tissues. They're right in there -right down under there. Yeah.

082 36 43 Duke (onboard): [Garble].

082 36 45 Mattingly (onboard): Huh?

082 36 46 Duke (onboard): [Garble].

082 36 47 Mattingly (onboard): I don't think so. I think they should be loose. (Laughter) Right - about where your hand is.

082 37 39 Crew (onboard): [Garble].

082 38 01 Duke (onboard): [Garble].

082 38 08 Mattingly (onboard): Got your tissues and all that stuff? Okay. Now, are you going to defecate down there? Okay.

082 38 21 Crew (onboard): [Garble].

082 38 22 Mattingly (onboard): Well, I'll do my things after you get done. Well, I'm gonna change the canister, and chlorinate some water, and all that stuff. I'll do it later. Okay? Change the canister and all that crew-sleep bull.

082 38 44 Crew (onboard): [Garble].

082 38 53 Mattingly (onboard): Because it's interconnected with the waste water system.

082 38 57 Crew (onboard): [Garble].

082 39 02 Mattingly (onboard): Not when you - look to see where those vents go together. And those boats really do go upstream. They ain't smart enough to read those check-valve labels.

082 40 57 Mattingly (onboard): [Garble].

082 41 29 Mattingly (onboard): Okay. We'll bump up the cabin and then get a little - Master Alarm.

082 41 42 Crew (onboard): [Garble].

082 41 47 Mattingly (onboard): If you think you're grungy, grimy, dirty now, wait until you get out on the surface, then go back in the LM. Man, I bet - I bet that LM looks like a disaster area.

082 42 20 Duke (onboard): [Garble].

082 42 29 Mattingly (onboard): I suspect you're right. I suspect that - we got a - a sensor that's supersensitive, and when you put loads on it, it - probably triggers at the wrong level. But I ain't gonna run around and troubleshoot it.

082 43 19 Mattingly (onboard): Well, let's see, I got to make sure - I got a pair of scissors left with me. Boy, you'd really be in deep trouble around here without your scissors. You got to make - we got to make sure that - There's some things on this transfer checklist that aren't there. What I want to do is make sure you don't transfer two more pair of scissors to the LM. (Laughter) This is...

082 43 51 Crew (onboard): [Garble].

082 44 00 Mattingly (onboard): I can't believe this place.

082 44 32 Crew (onboard): [Garble].

082 44 36 Mattingly (onboard): Yeah.

082 44 50 Duke (onboard): [Garble].

082 44 55 Mattingly (onboard): No. In fact, you don't even have to put your headset on. Yeah. Yeah, if you don't want to do that, I'll plug into your hose, and let them correlate the data.

082 45 14 Duke (onboard): [Garble].

082 45 18 Mattingly (onboard): I am.

082 46 04 Mattingly (onboard): Charlie, did you fill out your menu?

082 46 06 Duke (onboard): Yes.

082 46 07 Mattingly (onboard): Okay. John, did you fill yours out?

082 46 12 Young (onboard): No.

082 46 13 Mattingly (onboard): I'll fill it out for you if you'll tell me what you ate. Beef and gravy?

082 46 17 Crew (onboard): [Garble].

082 46 22 Mattingly (onboard): Huh? Chicken stew? Butterscotch? Chocolate bar?

082 46 27 Young (onboard): [Garble].

082 46 31 Mattingly (onboard): Chocolate pudding. Okay, I'll write that down.

082 46 34 Crew (onboard): [Garble].

082 46 37 Mattingly (onboard): (Laughter) What kind of tape did that bag have on it when you opened it? (Laughter)

082 46 44 Crew (onboard): [Garble].

082 46 51 Mattingly (onboard): (Laughter) You had a citrus beverage? How about gingerbread?

082 46 59 Young (onboard): [Garble].

082 47 01 Mattingly (onboard): Oh, man, you is a real hungry one.

082 47 37 Mattingly (onboard): Direct O2 is Off.

082 48 08 Duke (onboard): Adios, mother.

082 48 12 Mattingly (onboard): Gosh.

082 48 21 Crew (onboard): [Garble].

082 53 21 Mattingly (onboard): The tissues? They're right here. Here you go. Turn around. Ohh. Darn umbilicals! I hate these things.

082 55 29 Mattingly (onboard): Yeah.

082 57 02 Crew (onboard): [Garble].

082 57 04 Mattingly (onboard): (Laughter) They'll never publish it. (Laughter)

082 57 07 Crew (onboard): [Garble].

082 57 12 Mattingly (onboard): (Laughter)

082 57 23 Mattingly (onboard): That's right.

082 57 27 Crew (onboard): [Garble].

082 57 35 Duke (onboard): [Garble].

082 57 41 Young (onboard): [Garble].

082 57 50 Mattingly (onboard): (Laughter)

082 57 55 Crew (onboard): [Garble].

Public Affairs Officer: 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 nine 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.

082 58 04 Mattingly (onboard): How did you guys decide who was the owner?

082 58 12 Crew (onboard): [Garble].

082 58 14 Mattingly (onboard): (Laughter)

082 58 16 Crew (onboard): [Garble].

082 58 30 Mattingly (onboard): (Laughter) Well, you...

082 58 35 Crew (onboard): [Garble].

082 58 39 Mattingly (onboard): Well, you know, you come equipped with one.

082 58 46 Crew (onboard): [Garble].

082 59 00 Young (onboard): What for?

082 59 02 Duke (onboard): [Garble].

083 00 46 Mattingly (onboard): Huh? In five to ten minutes.

083 00 51 Crew (onboard): [Garble].

083 00 52 Mattingly (onboard): Five to ten minutes.

083 00 54 Crew (onboard): [Garble].

083 00 55 Mattingly (onboard): (Laughter) How about some water? It's chocolate pudding when you get through. (Laughter)

083 01 00 Crew (onboard): [Garble].

083 01 12 Mattingly (onboard): Is it what? Yeah, we're AOS now. Yeah.

083 01 28 Mattingly (onboard): AOS? Quite a while, I hope.

083 01 38 Crew (onboard): [Garble].

083 01 39 Mattingly (onboard): Yeah.

083 03 34 Crew (onboard): [Garble].

083 03 39 Mattingly (onboard): It says do that in the morning.

083 03 41 Crew (onboard): [Garble].

083 03 50 Mattingly (onboard): Hey, do you want me to fill them for you?

083 03 54 Duke (onboard): [Garble].

083 03 57 Mattingly (onboard): Where are they, Charlie?

083 03 58 Duke (onboard): [Garble].

083 03 59 Mattingly (onboard): Okay. I'll fill them. How much goes in them?

083 04 01 Duke (onboard): [Garble].

083 04 03 Mattingly (onboard): Oh, you're kidding. Okay. I'll do that right now.

083 04 27 Duke (onboard): [Garble].

083 04 48 Mattingly (onboard): Oh.

083 05 38 Crew (onboard): [Garble].

083 06 40 Mattingly (onboard): Okay, you decided you wanted to fill those drink bags, John?

083 06 47 Young (onboard): [Garble].

083 06 52 Duke (onboard): [Garble] start? [Garble].

083 07 15 Duke (onboard): Okay, pull the thing apart [garble].

083 07 57 Mattingly (onboard): John, you want me to fill these? Well, it looks like this High Gain isn't working.

Public Affairs Officer: 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.

Public Affairs Officer: 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 Control 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 [108.9 kilometres], and a perigee, or pericynthion more correctly, of 10.5 nautical miles [19.4 kilometres]. This crew rest period is scheduled to last for about nine hours. And the crew is to be awakened at about 91 hours, 30 minutes - about eight hours from now.

Public Affairs Officer: 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 one minute, 45 seconds before we lose 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 [19.3 by 108.9 kilometres]. 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 MSC News Center Briefing room. At 84 hours, 4 minutes this is Apollo Control, Houston.

Public Affairs Officer: 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 [108.9 kilometres] by 10.6 nautical miles [19.6 kilometres], meanwhile in the Mission Control center, we have had a shift changeover of flight control teams. 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 biomed, 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 conversation 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.

Public Affairs Officer: This is Apollo Control, Houston at 85 hours, 19 minutes Ground Elapsed Time. We have some 40 minutes remaining on this front side pass for Apollo 16. Now on its sixth 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 5,546 feet [1,690 metres] per second. Current altitude, 11 nautical miles [20.3 kilometres], the spacecraft is presently in an orbit of 58.8 nautical miles [108.9 kilometres] by 10.5 nautical miles [19.4 kilometres]. Spacecraft weight in orbit at this time 76,109 pounds [34,522 kilogrammes]. At 85 hours, 20 minutes, continuing to monitor, this is Apollo Control, Houston.

Public Affairs Officer: 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.

Public Affairs Officer: 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 [109.1 kilometres] by 10.6 nautical miles [19.6 kilometres]. 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 developed. We do now have acquisition with Apollo 16 and are receiving data. At 86 hours, 47 minutes Ground Elapsed [Time], this is Apollo Control, Houston.

Public Affairs Officer: 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 [108.9 kilometres] and 10.4 nautical miles [19.3 kilometres]. 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.

Public Affairs Officer: 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 [109.1 kilometres] by 10.6 nautical miles [19.6 kilometres]. 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.

Public Affairs Officer: 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 [108.9 kilometres] by 10.4 nautical miles [19.3 kilometres]. 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 one 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.

Public Affairs Officer: 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 [109.1 kilometres] by 10.5 nautical miles [19.4 kilometres]. We're coming up on acquisition of the spacecraft on this the ninth 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.

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Day Four Part Two:
Lunar Orbit Insertion

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Day Five Part One:
Transfer to Lunar Module,
Revs Ten and Eleven