Apollo Flight Journal logo

Previous Index Next
Day Four Part One:
Arrival at the Moon
Journal Home Page Day Four Part Three:
Descent Orbit Insertion,
Revs Three to Nine

Apollo 16

Day Four Part Two; Lunar Orbit Insertion, Rev One and Rev Two

Corrected Transcript and Commentary Copyright © 2006 David Woods and Tim Brandt. All rights reserved.

Start of Chapter

74:17

LOI Burn Starts

74:28

LOI Burn Complete. Start of Rev 1

74:34

CM Transcript Ceases

74:36

Acquisition of Signal and LOI Burn Report

74:51

Initial Description of Lunar Surface

74:53

Loss of Signal

76:13

Start of Rev 2

76:40

Acquisition of Signal

76:59

DOI Pad and Landmark Pad

77:39

TEI-5 Pad

77:48

Go for DOI

78:09

End of Chapter

78:21

Public Affairs Officer This is Apollo Control. [The] Apollo 16 spacecraft has passed behind the Moon two seconds early according to the Loss of Signal clock in the Control Center here. To review some of the upcoming numbers with the Lunar Orbit Insertion maneuver, ignition time will be at 74:28 - 74 hours, 28 minutes, 27 seconds Ground Elapsed Time - about ten minutes from now. The total Delta-V, or velocity change, will be 2,802 feet per seconds - feet [854 metres] per second in retrograde. Apollo 16, at the end of the burn will be in a lunar orbit measuring 58.3 nautical miles pericynthion [108 kilometres] and 170 nautical miles [315 kilometres] in apocynthion. Total burn time with the 2,000 pound thrust - 20,000 pound [89,000 Newtons] thrust Service Propulsion System engine will be six 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, eight seconds. The estimated impact time for the S-IVB third stage of the Saturn V, which propelled Apollo 16 on the way to the Moon. That impact time now is 75 hours, 7 [minutes], 3 [seconds] 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 acquisition of Apollo 16, as it comes around the east side of the Moon. And at 74:21 Ground Elapsed Time, this is Apollo Control.

074 22 33 Young (onboard): [Garble], Charlie, [garble].

074 22 44 Mattingly (onboard): [Garble].

074 22 47 Young (onboard): This where we [garble] here?

074 22 48 Mattingly (onboard): Yeah.

074 22 50 Young (onboard): Yeah. You can turn it on [garble].

074 23 01 Mattingly (onboard): Hey, we got something in that kit that'll clear your sinuses up?

074 23 05 Duke (onboard): Yeah.

074 23 07 Young (onboard): Actifed.

074 23 08 Duke (onboard): [Garble]?

074 23 09 Young (onboard): Afrin [garble].

074 23 10 Mattingly (onboard): [Garble] you squirt in there to...

074 23 12 Duke (onboard): [Garble].

074 23 13 Mattingly (onboard): Yeah, I need to do something; this thing's getting worse.

074 23 18 Young (onboard): Well, we checked the switches three times. I guess it wouldn't hurt to check them again. (Laughter) Okay [garble]. Popped.

074 23 27 Duke (onboard): [Garble].

074 23 30 Young (onboard): It's on Panel 229 over there, Charlie. It's [garble]...

074 23 33 Duke (onboard): I ain't heard a thing pop.

074 23 34 Young (onboard): You ain't heard nothing pop?

074 23 36 Mattingly (onboard): Interplanetary LOS [garble] plain [garble].

074 23 43 Duke (onboard): Well, that'll [garble].

074 23 46 Mattingly (onboard): Okay.

074 23 47 Young (onboard): Say that did kind of head out?

074 24 22 Mattingly (onboard): Ooh. I think I was right.

074 24 29 Young (onboard): What's that?

074 24 30 Mattingly (onboard): That guy had died. My nose ain't that stopped up. All that goes through is the odors, no oxygen.

074 24 47 Young (onboard): Whew! I see what you mean. That was me.

074 24 57 Mattingly (onboard): Well -

074 25 27 Duke (onboard): It's not...

074 25 28 Mattingly (onboard): Send that out of here.

074 25 30 Young (onboard): Smells a long time [garble]. You guys are putting that on the tape, too [garble].

074 25 37 Duke (onboard): (Laughter)

074 25 38 Mattingly (onboard): Just be glad they don't have a gas inlet around here.

074 25 42 Young (onboard): That's right.

074 25 47 Mattingly (onboard): Oh, machine, do your thing. I won't badmouth you for being a marshmallow again.

074 26 12 Young (onboard): Okay. Coming on two minutes.

074 26 23 Young (onboard): [Garble] daylight, we'll see it.

074 26 27 Duke (onboard): We going to burn, we come into daylight.

074 26 29 Young (onboard): Yeah.

074 26 30 Mattingly (onboard): Don't look.

074 26 32 Young (onboard): No, don't look, we got too many - too many things going bad for us to look this time. Look after the burn. Get right there and then you get [garble]. Phew!

074 27 24 Young (onboard): Okay, gonna do it right in one minute [garble]. Stand by.

074 27 29 Duke (onboard): There it is.

074 27 30 Young (onboard): One minute. EMS [garble].

074 27 32 Mattingly (onboard): Translation Power, we don't need. The light is out. Delta-V Thrust A is coming on -

074 27 39 Mattingly (onboard): Mark.

074 27 40 Young (onboard): Okay.

074 27 55 Young (onboard): DSKY blank.

074 28 03 Mattingly (onboard): Okay, average g is on. It's counting. Looks good, though.

074 28 19 Young (onboard): 10, 9, 8, 7, 6, 5 - 50 99...

074 28 26 Mattingly (onboard): Pro.

074 28 27 Duke (onboard): Pro.

074 28 28 Young (onboard): Took; 2, 1...

074 28 30 Duke (onboard): A's open. SPS - Okay, lights are out.

074 28 33 Young (onboard): Okay.

074 28 34 Duke (onboard): Pressure's looking good.

074 28 35 Mattingly (onboard): Stable. Bank B.

074 28 36 Duke (onboard): They're open.

074 28 37 Mattingly (onboard): I felt a - seemed like they dropped.

074 28 38 Young (onboard): Where?

074 28 40 Mattingly (onboard): Pressure is 90 on the gage.

074 28 42 Duke (onboard): Pressure's looking great here. Helium valves are open. PUGS is looking good.

074 28 50 Mattingly (onboard): I can feel that sucker bring that second bank on.

074 28 54 Young (onboard): Yeah, I felt that, too.

074 28 56 Duke (onboard): Okay. We - I see it in the reflection in the LM windows.

074 29 00 Young (onboard): Keep your. eye on them, babe.

074 29 04 Duke (onboard): I am. I got them, babe.

074 29 03 Mattingly (onboard): What was the alarm at the start?

074 29 04 Duke (onboard): It went out, whatever it was. I think it was a overpressure on the SPS; now it's back nominal.

074 29 09 Mattingly (onboard): Okay.

074 29 12 Duke (onboard): Okay, fuel's running a little low. It's running about 165. Coming up on a minute.

074 29 23 Mattingly (onboard): Chamber pressure's staying, and - coming up a little bit, maybe. Up 92.

074 29 29 Duke (onboard): Mark, one minute.

074 29 31 Mattingly (onboard): Okay. Doesn't register on the g meter (laughter). Okay, gimbals are still steady.

074 29 41 Duke (onboard): Okay. Stand by -

074 29 42 Duke (onboard): Mark. Loose limit.

074 29 46 Young (onboard): [Garble].

074 29 50 Mattingly (onboard): Chamber pressure's going up a little.

074 29 56 Young (onboard): [Garble].

074 29 58 Mattingly (onboard): Yeah, I gave you bum dope. I was calling that 90, but it was 95.

074 30 01 Young (onboard): Son of a.gun.

074 30 02 Mattingly (onboard): Inside.

074 30 03 Young (onboard): Inside.

074 30 05 Duke (onboard): [Garble] 130.

074 30 06 Mattingly (onboard): That's really 96 psi on the chamber pressure.

074 30 11 Duke (onboard): PUGS is looking great.

074 30 12 Mattingly (onboard): Attitudes are holding. How do the two Delta-Vs compare, John?

074 30 18 Young (onboard): Delta-Vs compare pretty close, as matter of fact.

074 30 21 Mattingly (onboard): Measurables [garble]. I mean, to go.

074 30 23 Young (onboard): Yeah, yeah.

074 30 25 Mattingly (onboard): About ten.

074 30 26 Young (onboard): Yeah, ten apart. Lot closer than in the simulator.

074 30 29 Mattingly (onboard): [Garble]. Okay.

074 30 30 Duke (onboard): Mark, two minutes.

074 30 31 Young (onboard): [Garble].

074 30 32 Mattingly (onboard): [Garble] coming down.

074 30 41 Mattingly (onboard): Trim's [garble]. Chamber pressure, 97.

074 30 47 Young (onboard): Okay. What's the cut-off?

074 30 49 Mattingly (onboard): BMAGs look good.

074 30 50 Duke (onboard): Four - about 04:15.

074 30 51 Mattingly (onboard): Four - yeah. 04;30.

074 30 52 Duke (onboard): 04:20, actually.

074 30 53 Young (onboard): Yeah. You're gonna make me nervous [garble].

074 30 57 Mattingly (onboard): When I say what?

074 30 59 Duke (onboard): Mark; 02:30.

074 31 01 Young (onboard): Okay.

074 31 05 Mattingly (onboard): [Garble]...

074 31 06 Duke (onboard): CMC's right on, with my time. PUGS is about 100, unbalanced, and holding. Decrease.

074 31 21 Young (onboard): [Garble]. Looks like it's working, doesn't it?

074 31 22 Mattingly (onboard): Man, it sure does.

074 31 24 Duke (onboard): Okay, coming up on 3 minutes...

074 31 25 Mattingly (onboard): [Garble]. (laughter). Chamber pressure...

074 31 29 Duke (onboard): Mark.

074 31 30 Mattingly (onboard):...78.

074 31 31 Duke (onboard): Okay, we got 150 on the PUGS, unbalanced, decrease.

074 31 34 Mattingly (onboard): Okay. Don says that if we watch it go, it'll go down to about - almost 200 and then work its way back up.

074 31 40 Duke (onboard): Okay.

074 31 43 Young (onboard): Okay. Three minutes. Right on time.

074 31 47 Mattingly (onboard): Man, that thing is - their prediction is right on this.

074 31 50 Young (onboard): Yeah.

074 31 51 Mattingly (onboard): Isn't that beautiful?

074 31 52 Duke (onboard): [Garble] heard of it.

074 31 53 Young (onboard): [Garble].

074 31 54 Duke (onboard): Okay, coming up on 03:30.

074 31 56 Young (onboard): EMS and the Delta-V to go are right together. Perfect.

074 31 59 Duke (onboard): Mark; 03:30.

074 32 02 Mattingly (onboard): Chamber pressure's at 98.

074 32 06 Duke (onboard): Stand by for the tight limits -

074 32 07 Duke (onboard): Mark. Tight limits. We're at 200; unbalanced; jiggling around a little bit; decrease.

074 32 20 Mattingly (onboard): Okay, [garble].

074 32 23 Duke (onboard): Coming up on 4 minutes. SPS pressures are rock solid.

074 32 29 Duke (onboard): Mark; 4 minutes.

074 32 31 Mattingly (onboard): Inside (laughter).

074 32 32 Duke (onboard): I'm not, I'm looking at the gages. I was having a little bias back there. Okay?

074 32 39 Young (onboard): Okay, and now for [garble].

074 32 40 Duke (onboard): Stand by for crossover.

074 32 43 Young (onboard): EMS and this thing are right together. Couldn't be any closer.

074 32 47 Duke (onboard): It looks like we've had crossover.

074 32 49 Mattingly (onboard): Okay. My chamber pressure very smoothly increased to 100.

074 32 53 Duke (onboard): Okay, and the unbalance went a back - that's jiggling around on zero. Stand by.

074 32 59 Duke (onboard): Mark; 04:30.

074 33 05 Mattingly (onboard): Man, that mental machine.

074 33 07 Young (onboard): Keep doing it, machine.

Public Affairs Officer 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 six minute, 14 second duration [ after] 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 eight minutes from now, or at Ground Elapsed Time of 74 hours, 50 minutes, 5 seconds. To repeat again, the predicted S-IVB impact time [is] 75 hours, 7 [minutes], 3 [seconds]. 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 seven minutes, this is Apollo Control.

074 33 24 Duke (onboard): Coming up on five minutes.

074 33 29 Duke (onboard): Mark; five minutes. Unbalance is 150, decrease. Looking great.

074 33 34 Young (onboard): [Garble] to go.

074 33 39 Duke (onboard): Helium's down to 1800. Nitrogen's looking great.

074 33 45 Mattingly (onboard): Man, that time is gonna be 06:14.

074 33 47 Young (onboard): Sure is.

074 33 51 Mattingly (onboard): Casper, you're gonna lose your bar [?].

074 33 54 Young (onboard): That's really spectacular.

074 33 56 Duke (onboard): Okay. Stand by, on 05:30.

074 33 59 Duke (onboard): Mark; 05:30.

074 34 05 Young (onboard): At shutdown, maybe we can get another light [garble].

074 34 09 Mattingly (onboard): Yep.

074 34 10 Duke (onboard): Okay. Rock solid. Thirty seconds.

074 34 16 Mattingly (onboard): Not gonna get there early. Got ten seconds overburn to worry about.

074 34 20 Duke (onboard): Yeah. 100, decrease, unbalance, looking super, 40 percent. Six minutes -

074 34 29 Duke (onboard): Mark.

074 34 31 Young (onboard): [Garble].

074 34 33 Duke (onboard): 06:05 -

074 34 34 Duke (onboard): Mark. 06:10, 11, 12, 13, 14, 15...

074 34 45 Young (onboard): Auto shutdown.

074 34 46 Duke (onboard):...15.1...

[Apollo 16 is now in Lunar orbit, starting Rev 1]

074 34 47 Young (onboard): Master Alarm.

074 34 48 Duke (onboard): RCS pressure.

074 34 49 Young (onboard): RCS pressure.

074 34 50 Duke (onboard): It's okay.

074 34 51 Mattingly (onboard): Okay. Two, three...

074 34 52 Duke (onboard): It went high on the...

074 34 53 Mattingly (onboard):...four. Okay. We've done our thing. We didn't get anything here. You want to...

074 34 57 Young (onboard): [Garble].

074 34 58 Mattingly (onboard):... copy those numbers? Two, 3, 28039.

074 35 01 Young (onboard): Yeah.

074 35 05 Duke (onboard): Okay. What, 28039?

074 35 07 Mattingly (onboard): Yeah, 28039.

074 35 10 Duke (onboard): They're okay.

074 35 11 Mattingly (onboard): Okay.

074 35 14 Young (onboard): Plus 0.2, minus one -minus zero, minus one. We got to look at 1620, right?

074 35 21 Duke (onboard): [Garble] 5-5.

074 35 22 Young (onboard): 1620.

074 35 23 Duke (onboard): You're not gonna trim.

074 35 24 Young (onboard): No, but...

074 35 25 Mattingly (onboard): Okay, get the - Delta-Vs now - I mean, Delta-V, 20.

074 35 28 Young (onboard): That just call a Noun 20?

074 35 30 Mattingly (onboard): Yeah, Verb 6.

074 35 34 Young (onboard): Okay. Enter. Okay, now let's - Roll's fine...

074 35 40 Mattingly (onboard): [Garble].

074 35 41 Young (onboard):... [garble] 02. 35799.

074 35 42 Mattingly (onboard): Yes.

074 35 44 Young (onboard): Plus 26.8.

074 35 45 Mattingly (onboard): Yes.

074 35 46 Young (onboard): That's good. You get that?

074 35 47 Duke (onboard): Good, yeah. Let's go with the gimbal motors.

074 35 50 Mattingly (onboard): Okay. Wait a minute now. Let me see if we got everything here. Gimbal Motors, four, Off. Okay. Main B.

074 35 53 Duke (onboard): Go.

074 35 54 Mattingly (onboard): One.

074 35 55 Duke (onboard): It's Off.

074 35 56 Mattingly (onboard): Two.

074 35 57 Duke (onboard): It's Off.

074 35 58 Mattingly (onboard): Main A.

074 35 59 Duke (onboard): Go.

074 36 00 Mattingly (onboard): One.

074 36 01 Duke (onboard): Go.

074 36 02 Mattingly (onboard): Two.

074 36 03 Duke (onboard): Go. Both Off.

074 36 04 Mattingly (onboard): Okay. Servo Power. Go ahead and go to P00. I'll do this one. Two, Off.

074 36 09 Duke (onboard): [Garble] on.

074 36 10 Mattingly (onboard): Okay, hand controllers are locked. Directs, Off.

074 36 13 Young (onboard): Off.

074 36 14 Young (onboard): That's off,

074 36 15 Young (onboard): Off. Direct Power, Off.

074 36 16 Young/Mattingly:(onboard): Direct Ullage...

074 36 17 Mattingly (onboard):... was never closed.

074 36 18 Young (onboard): Circuit breaker, Pitch 1, Yaw 1. I sure got that.

074 36 24 Young/Mattingly:(onboard): Okay, did we get all that?

074 36 25 Young (onboard): EMS Function, Off. Standby.

074 36 27 Mattingly (onboard): Standby [garble].

074 36 29 Young (onboard): Pro.

074 36 30 Young/Mattingly:(onboard): Att Dead Band to Max.

074 36 32 Mattingly (onboard): BMAGS, three, to Rate 2. Bus Ties are Off, Charlie?

074 36 37 Duke (onboard): Yeah.

074 36 39 Mattingly (onboard): Okay, the Bit Rate...

074 36 40 Duke (onboard): Going Low.

074 36 41 Mattingly (onboard): Okay.

[Break in CM tape until 075 27 43]

Public Affairs Officer 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 assuming 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 eight minutes [and] eight 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 [at] 74 hours, 50 minutes, 5 seconds. At 74:42 Ground Elapsed Time, this is Apollo Control.

Public Affairs Officer 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 elliptical orbit around the Moon, with a pericynthion of 58.3 nautical miles [108 kilometres], [and an]apocynthion of 170 nautical miles [315 kilometres]. We'll stand by here for the first words from the crew and the burn report. Displays being changed here in the Control Center from the Earth-Moon transit display in the center scribing plotter to the Lunar Orbit plotter. Mark-Zero. Let's leave the line up now. - Confirmed AOS.

074 51 10 Young: Hello, Houston. Sweet 16 has arrived.

074 51 14 Peterson: Roger, 16. Copy you loud and clear.

074 51 20 Duke: Okay, Pete. Super double fantastic burn. If you're ready, I'll give you a burn status report.

074 51 31 Peterson: Okay, go ahead, John.

074 51 34 Duke: Okay, Delta-T. was 0615 burn - 06:15.1 burn time, plus 2803.9, trim [garble]; residuals, plus 0.2, minus zero, minus 0.1. Delta-VC is minus 5.5; fuel, 376, Ox, 371; 150, unbalance, decrease. Okay, at ignition, we got a momentary SPS light; then it went out. During the burn, the Oxidizer pressure read 200. The Fuel side was a little bit low, and it was about 165 on my gage. After shutdown, the Fuel side climbed to 170. The Oxidizer went to about 202 with an SPS light, and we've still got it. Over.

074 52 33 Peterson: Roger. We copied everything except the roll, pitch, and yaw, which was blacked out by some noise.

074 52 41 Duke: Okay, the trim attitude - we did not trim. The residuals were as we gave you after the burn. Our attitude was 005, 358, 002. Over.

074 52 53 Peterson: Roger. We copy.

074 53 01 Young: And it was a slight transient, when the second bank was lit, that I don't remember from previous burns. You might look at that data, but it was super.

074 53 13 Peterson: Roger. Copy.

074 53 14 Mattingly: And it appeared to me that the chamber pressure had dropped off just as we brought the second bank on.

074 53 25 Young: And as you can see, we're in 170.4 by 58.3 [nautical miles - 315.6 by 108 kilometres] according to the old computer, and that baby just rifled it right down the line.

074 53 36 Peterson: All righty.

074 53 37 Young: 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.

074 53 48 Peterson: Roger.

074 53 49 Young: You can see those little dark - those little dark - look like volcanic black spots up - up in the north sector of it, and you can see the central peaks with a - with a varied - very white central peaks covered by lighter gray - gray-brown material that sort of looked like somebody painted it on there with a - with a - with a paintbrush.

074 54 39 Mattingly: And, Pete, your first view at Tsiolkovsky out of my window is pretty - it's a spectacular sight the way that - looks like a marshmallow float - a central peak floating in the top of a hot chocolate.

074 54 55 Young: Yeah, you - it - it's like - three guys - they've each got a window, and we're staring at - at the ground. It's really - Boy, this has got to be the neatest way to make a living anybody's ever invented.

074 56 20 Duke: Pete, 16 here. Another pretty sight we had before burn was the earthset. It - really quite a view.

074 56 33 Peterson: We're all sitting here listening, Charlie. Tell us about it.

074 57 14 Duke: Pete, you got - a - Mapping - or the Pan Camera Power's - is on?

074 57 21 Peterson: Okay, Pan Camera Power on.

074 58 00 Young: How'd the S-IVB look?

074 58 07 Peterson: It hasn't happened yet, John. It's about another - nine minutes or so.

074 58 25 Young: I - I trust we're not getting there the same time it does.

074 58 29 Peterson: I trust.

074 58 33 Young: Okay.

074 59 41 Peterson: It - it's going to hit on the southwest corner of Reinhold, Ken.

074 59 46 Young: Say again, Pete.

074 59 47 Peterson: Tell Ken it's going to hit on the southwest corner of Reinhold. He should know where that is.

074 59 55 Young: I'm sure he does.

074 59 58 Mattingly: Okay. Let me get the binoculars out here - playing with them there. It's pretty interesting. I tell you, all that time spent with Farouk sure really's going to pay off, because it does look like old home.

075 00 15 Peterson: That's good, Ken.

075 00 16 Mattingly: The lawn needs mowing and all that.

075 00 28 Peterson: Okay, Casper, Pan Camera Power, Off.

075 00 36 Duke: Roger.

Public Affairs Officer This is Apollo Control, 75 hours, 1 minute Ground Elapsed Time. Completely successful Lunar Orbit Insertion burn, with a duration of six minutes and 15 seconds. Reported on board measurements on the lunar orbit 58.3 by 170.4 nautical miles [108.0 by 315.6 kilometres]. We'll continue to monitor this first front side pass and Lunar Orbit Number 1. At 75:02 this is Apollo Control.

075 03 21 Duke: Pete, looking out at the horizon, you can really tell you're in the highlands. The horizon is really jagged looking.

075 03 31 Peterson: Looks like coming up on the Rockies, huh?

075 03 34 Young: Of course, we're start - we're starting to come up over the flatlands now, over the Smyth Sea. I remember a landmarking track 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 right in the surrounding terrain.

075 03 59 Peterson: Roger.

075 06 17 Young: The submerged craters in Smythii remind me a lot of a- coral atolls. They just got the ridges sticking up, you know, and the - and the bottoms of them appear to be flooded with the same material that's in Smyth.

075 06 40 Peterson: We're digging out a map now, 16, to take a look at it.

075 07 42 Young: 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.

075 07 49 Peterson: Roger.

075 08 04 Young: That's real - it's really a fascinating crater, the way the dark mare has got in - sort of like a path around the edges, and - 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.

075 08 31 Peterson: Roger.

075 08 38 Young: Boy, those fracture patterns running down through it are white - appear to be white, layered fracture patterns. They look like somebody's drawn them on there with a piece of chalk.

075 09 38 Peterson: S-IVB has impacted.

075 09 25 Young: Okay.

Public Affairs Officer Seismograph traces beginning to show of the S-IVB impact at approximately 75:09, Ground Elapsed Time.

075 13 15 Young: Houston, out my window is fine now. We got Petavius with it's central dome of - a whitish cap - dome, and it's a fairly subdued crater, and the lineations running into it - the rilles or whatever they are - are just like it's drawn on the map here.

075 13 44 Young: Some of those central domes are exceptionally dark, and they have exceptionally dark material running down a white surface. You can see that.

075 16 03 Mattingly: With the binoculars, we passed over Langrenus, and you can see blocks on the tops of the central peak, and some features that probably are there that I just haven't noticed before in that central feature. You can see an awful lot of - looks like a - the demarcation where the central feature - looks like a crack in it - has a whole ring of craters that kind of dots that boundary. And then, you see some more of those little craters up along near the top of the central lineament also. And you just don't see those kind of things stand out at you without the binoculars.

075 16 40 Peterson: Roger.

075 16 44 Mattingly: I could also say that the binoculars at ten power is the maximum you can hold in your hand. You got to get yourself set up very nicely for it before you start.

075 16 53 Peterson: Roger.

075 17 11 Duke: And we're coming up over the Messier A and B Craters.

Public Affairs Officer This is Apollo Control at 75 hours, 8 [sic - actually 18] minutes Ground Elapsed Time. Crew of Apollo 16 still three tourists in their first Lunar Orbit observing the features of the Moon, calling out various craters as they pass over them. [The] 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.

Public Affairs Officer 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 precursor to the landing missions. [The] Apollo 10 mission descended to within about eight 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.

075 23 26 Duke: Houston, we're coming up on Theophilus now. Central peak's in the shadows, and the - As we approach the terminator, looking out towards the horizon, it really looks rugged.

075 23 39 Peterson: Roger.

Public Affairs Officer This is Apollo Control. Members of the Orange Team of flight controllers under Pete Frank are beginning to drift into the room for the change of shift handover 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.

075 24 41 Peterson: 16, if you'll give us the computer and go Accept, we'll give you a REFSMMAT.

075 24 52 Young: You've got it.

075 25 55 Young: Just now looking at the Altai Scarp and, boy, it's well named in this lighting.

075 26 01 Peterson: Roger.

075 26 07 Young: Looks like the walls are vertical. I'll admit the lighting exaggerates it, but that's how it looks.

075 26 12 Peterson: Roger. Copy.

075 26 21 Peterson: And, 16, we're finished with the up-link.

075 26 28 Mattingly: Okay, back to Block.

075 27 43 Mattingly (onboard): You want to do one?

075 27 44 Young (onboard): Huh? Do I?

075 27 45 Duke (onboard): Well [garble].

075 27 46 Mattingly (onboard): You should be able to. Be right at the terminator.

075 27 51 Young (onboard): Right at the terminator, huh?

075 27 52 Mattingly (onboard): Yeah.

075 27 53 Young (onboard): Trouble with the terminator, this Moon is so ragged, I can't - do it even. I'll get a decent terminator shot.

075 28 05 Mattingly (onboard): I'll take care of all that. Okay, there's Taylor, Taylor A [garble] Zöllner - then we have to have [garble] Descartes. That is Descartes, right there. See the - [garble]?

075 28 27 Young (onboard): Where?

075 28 28 Mattingly (onboard): Right down - Here, let me - get to this window; I'll show you. Right there? The crater Descartes.

[End of CM ttranscript until 076 17 54]

075 28 28 Mattingly: 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 - in fact I had to look in to my map in order to make sure that was what I was looking at. And the material that runs out of it - that - that's in the area, are the things we talk about as being that bright reflective area, in this low Sun angle, has a much blockier and jumbled appearance than it does on any of the high-Sun photographs.

075 29 21 Peterson: Roger.

075 29 22 Mattingly: It looks very much like looking down on a clinkery - a big clinkery cinder field, but on a much larger scale.

075 29 30 Peterson: Roger. Copy.

075 29 32 Duke: Yeah, a big - a rounded surface of clinkers. It's fantastic. Boy, is that rough!

075 30 15 Duke: Okay, Houston, as we look to the west into past the terminator, there's - a couple of degrees past the terminator, there's one bright spot, a peak standing up which is west of - well, west of Kant.

075 30 39 Peterson: Charlie, you're fading out.

075 30 40 Duke: Really high ground. Say again.

075 30 47 Peterson: Right after you started talking about this peak and you said something like "west of," you faded out.

075 31 06 Peterson: Go ahead, Charlie.

075 31 45 Young: Yeah, the general opinion here is that we may be looking at part of the Smoky Mountain sticking up through some - through the shadow.

075 31 53 Peterson: [Garble].

075 32 25 Peterson: Houston, 16, FAO advises you've got some extra film on Magazine UU - that's VHBW, and you can use it for targets of opportunity, and you can use the CEX exposure graph and stop down one stop from what you get off the graph.

075 32 50 Young: Okay, I hear you.

075 33 33 Peterson: And, Casper, on that last transmission - As an example, f/11 for the CEX, you should go to f/16 to use with Magazine UU.

075 33 47 Young: Okay.

075 36 52 Mattingly: 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 is Min. At the proper time, I'll - I've got the BMAGs in Rate 2, I'll go to SCS Control, and then I don't have to worry about loading 509. And I'll just go ahead and do the P52. And then when we're through, I can go back to CMC Control. Is that correct?

075 37 25 Peterson: That's affirmative.

075 37 30 Mattingly: All right, sir; thank you.

Public Affairs Officer This is Apollo Control, at 75:39 Ground Elapsed Time. Apollo 16 approaching the lunar terminator or sundown; in about four minutes. At the present time, the crew is conducting a program 52 realignment of the inertial measuring 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 4 o'clock Central Time at the Houston News Center Briefing Room. At 75:39, this Apollo Control.

075 40 21 Mattingly: Hey, Don, we're trying to set up the - the camera for the next terminator and sunrise, and I thought I understood what you told me about the settings, but I guess I don't. Can you run through that again? I guess I just as soon have you just give me the proper settings.

075 40 38 Peterson: You're talking about this Magazine UU that I just called up?

075 40 44 Mattingly: Yes, sir; the VHBW.

075 40 47 Peterson: Roger; stand by.

075 41 06 Peterson: Ken, they - they're get - looking that up for us right now. And in the meantime, 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 on board, and take the readings off of that.

075 41 21 Mattingly: Roger.

075 41 22 Peterson: And then simply increase the stop number one stop. For example, if the CEX exposure graph calls for f/11 and you're gonna use this Magazine UU, you should go to f/16.

075 41 41 Mattingly: Yeah, okay. I - I thought - I - You used an example; I thought you meant that specifically, and I couldn't make that correlate. Okay. And Charlie says this magazine is HBW instead of VHBW.

075 41 55 Peterson: That's affirmative; he's right.

075 42 09 Peterson: And, Casper, for the terminator photography on the next rev, we're recommending you go ahead and use Magazine SS. That's Sierra Sierra.

075 42 23 Mattingly: Okay; use the one we had planned on.

075 42 26 Peterson: That's affirmative.

075 42 30 Mattingly: Okay, thank you.

075 42 50 Peterson: And, Casper, that call on Magazine UU; we meant to impart to you that you can use that for targets of opportunity.

075 43 01 Mattingly: Roger. Okay, thank you.

075 43 07 Peterson: Roger.

075 51 11 Peterson: 16, put the High Gain on Auto.

076 05 52 Mattingly: Houston, did you copy our torquing angles?

076 05 56 Peterson: Affirmative. We got them.

076 06 01 Mattingly: Say again, please.

076 06 03 Peterson: Affirmative. We got them.

076 06 08 Mattingly: Okay, Don; one comment. I'll try again and take a look at the optics in the - when we get out into the double umbra, but right now in the telescope, I - I can see the stars now, but I still can't see star patterns. Like we looked at - at Antares - and you just couldn't see the Scorpion at all. And that may be due to the extreme amount of earthshine that's being reflected off of the LM. That LM is like looking at it almost in daylight, and, good gosh, the - the Moon looks like you can see everything on there just like - it's really bright.

076 06 46 Peterson: Right. Okay, Ken; we understand.

Public Affairs Officer This is Apollo Control. We're ready to switch now to the MSC 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.

076 12 34 Peterson: 16, we're about a couple of minutes from LOS. Everything is looking good, and while you're behind the Moon, we'll change shifts and pick you upon the next rev.

076 12 47 Young: Okay. We sure enjoyed it, and we really appreciate all of the things that you guys are doing to get us into orbit here. Man, I don't - That's the kind of help that really does it for us. Thank you much.

076 13 01 Peterson: Roger; thank you.

[Loss of Signal]

076 17 54 Mattingly (onboard): Well, I guess that - that sort of makes six days of PTC not so bad.

076 18 25 Mattingly (onboard): Let's see, I ought to be able to do both of these at the same time, or can I? Tsk, tsk, tsk, tsk, tsk, tsk, tsk.

076 18 32 Young (onboard): Both of what?

076 18 33 Mattingly (onboard): Both these dumps.

076 18 34 Young (onboard): [Garble].

076 18 35 Mattingly (onboard): [Garble] separate.

076 19 27 Mattingly (onboard): What time was our - AOS - I mean, sunrise?

076 19 34 Young (onboard): Sunrise -

076 19 47 Mattingly (onboard): Just look at the Flight Plan, there [garble].

076 19 50 Young (onboard): You hope.

076 19 52 Duke (onboard): We got to get going here, I'll tell you [garble].

076 19 55 Mattingly (onboard): Well, we've got at least 20 minutes, Charlie.

076 19 57 Young (onboard): Charlie, [garble]. Okay. AOS [garble] LOI, 74...

076 20 05 Mattingly (onboard): No, no, no, no. Look at the Flight Plan where the column stops. It goes from black to white.

076 20 13 Young (onboard): Oh. Okay. 76:18 [garble].

076 20 30 Duke (onboard): Sunrise?

076 20 32 Young (onboard): I don't know. No, it's...

076 20 35 Duke (onboard): 76:28, man.

076 20 36 Mattingly (onboard): No, couldn't be.

076 20 39 Young (onboard): Well, it - if it goes to black to some other squiggly line, what is that squiggly line? It goes from black to a squiggly line. Okay. And then it becomes full sunrise at 76:35.

076 21 04 Duke (onboard): Okay, what settings do I use on this color? I don't see how this can show that terminator with color film.

076 21 16 Young (onboard): Have any [garble]?

076 21 22 Duke (onboard): Em.

076 21 32 Mattingly (onboard): [Garble].

076 21 43 Young (onboard): No, you admit my ability to read the chart. It's wrong. (Laughter) One small step for mankind, here. What do you make it out to be, Charlie?

076 21 57 Duke (onboard): 76:28.

076 21 59 Young (onboard): Is that when it gets daytime? Or get sunrise?

076 22 02 Duke (onboard): That's our sunrise.

076 22 04 Young (onboard): Our sunrise. Well, that can't be sunrise, man. He ain't gonna believe that. That's because you're looking at it [garble], which you ain't gonna ever see again (laughter). Every time we did this on Apollo 10, a Fuel Cell light came on; every time we [garble]. And I was totally ignorant of what the fuel cell [garble], in here somewhere [garble].

076 23 05 Young (onboard): Where are the scissors [garble]?

076 23 07 Duke (onboard): I put both pair down there in the [garble].

076 23 24 Mattingly (onboard): [Garble].

076 23 53 Mattingly (onboard): Here [garble].

076 24 24 Mattingly (onboard): Okay. That's what we need to know.

076 25 39 Young (onboard): Did we stop logging our intake and all that stuff today?

076 25 42 Mattingly (onboard): Yep. Did that this morning. I mean, after the first [garble]. What time did they say we get the AOS? About -

076 26 05 Duke (onboard): He didn't say.

076 26 08 Young (onboard): I never said.

076 26 11 Duke (onboard): Neither did the ground.

076 26 15 Young (onboard): They're supposed to give us a Rev 2 update for that stuff, and they did, didn't they?

076 26 19 Mattingly (onboard): No, I don't think they're supposed to.

076 26 22 Young (onboard): Start coming out [garble].

076 26 24 Mattingly (onboard): Yep. It's altered in the Flight Plan.

076 26 28 Young (onboard): I guess this is the real crux. If you don't get around on this rev, they've really screwed up.

076 26 36 Duke (onboard): We had [garble] terminator I'm supposed to take a

picture of.

076 26 39 Mattingly (onboard): Then what?

076 26 40 Young (onboard): Yeah.

076 26 41 Mattingly (onboard): You want me to take a picture of Crookes or not? I - I ...

076 26 43 Duke (onboard): Go ahead.

076 26 44 Mattingly (onboard): I [garble].

076 26 45 Duke (onboard): I don't want you to take a picture of anything [garble] asked--

076 26 46 Young (onboard): [Garble] asked us to ask you to take a picture of it.

076 26 49 Mattingly (onboard): Oh. He did. Okay, [garble].

076 26 52 Young (onboard): Please tell those guys - please tell Ken...

076 26 55 Duke (onboard): Exactly what he said.

076 26 56 Young (onboard):... that...

076 26 58 Duke (onboard): We're sorry he doesn't want to.

076 26 59 Young (onboard): What he said was, "I'd like to get a picture of Crookes." He said, "There's a possibility that you guys may be able to pick it up, depending on whose window you're sitting in at the time· I know Ken looks at it, but I don't know if you do or not; but if you happen to be sitting there and it comes around, why don't you get a picture of it?" That's what he said. On account of something, I forget what [garble].

076 27 30 Duke (onboard): I'm proud of you.

076 27 31 Young (onboard): [Garble].

076 27 35 Mattingly (onboard): Now, how about putting the 215 lens on there?

076 27 39 Duke (onboard): Okay. Is that our waste water tank?

076 27 43 Young (onboard): Yeah [garble].

076 27 45 Duke (onboard): Still got 20 percent more to go.

076 27 51 Mattingly (onboard): Don't - don't [garble] (laughter).

076 27 56 Young (onboard): I'm not able to tell that they're doing any of that.

Public Affairs Officer 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.

076 28 37 Mattingly (onboard): You're right. That's a - that's a rather startling sunrise, isn't it?

076 28 45 Young (onboard): Waste water [garble] 20.

076 28 57 Duke (onboard): Okay, it's on, Ken.

076 29 00 Young (onboard): You want to get over here, Ken?

076 29 01 Mattingly (onboard): [Garble].

076 29 02 Duke (onboard): It's out of this window. Crookes's supposed to be.

076 29 06 Mattingly (onboard): It should be out - out of here or there, either one. This seems to be fine.

Public Affairs Officer 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 Controllers. 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 [314.6 kilometres], a perilune of 58.1 [nautical miles, 107.6 kilometres]. At 76 hours, 29 minutes, this is Apollo Control.

076 29 21 Mattingly (onboard): [Garble] I have one at [garble].

076 29 29 Young (onboard): Okay, we got our fuel cell purge now?

076 29 31 Duke (onboard): No. I'm gonna start it right now.

076 29 34 Mattingly (onboard): Okay. Let's see, get - get the - Suppose we could use Magazine SS? That other one.

076 29 42 Duke (onboard): That one's the magazine you want to use for this?

076 29 45 Mattingly (onboard): Yeah.

076 30 02 Mattingly (onboard): Okay, and this is gonna be [garble] seven [garble] six [garble]. Okay [garble] SPS pressure.

076 30 24 Duke (onboard): Going up, you mean?

076 30 25 Mattingly (onboard): I put it to acknowledge [?] because it was on continuously. Must be [garble]. It looks like it's gonna go higher. It's about 210 now.

076 30 36 Duke (onboard): Well - Yeah, if the light was on, though, it should come back on again.

076 30 39 Mattingly (onboard): It may have gone off from being cooled down.

076 30 41 Duke (onboard): Yeah. Okay. Probably.

076 30 44 Young (onboard): Take a look in there. The condenser's normal [garble].

076 31 00 Duke (onboard): Starting to open the purge [garble]. Maybe we better turn off the waste water dump.

076 31 05 Mattingly (onboard): Okay, I'll get it. What's that?

076 31 11 Duke (onboard): Fuel Cell 1. Okay.

076 31 15 Mattingly (onboard): Have you already done the...

076 31 17 Duke (onboard): It's did with the purge.

076 31 18 Mattingly (onboard): Oh. All right. Okay. Okay. This is off.

076 31 23 Duke (onboard): Okay, right at ten.

076 31 43 Duke (onboard): Man, we are streaming out a lot of particles with us. Okay, this terminator's coming up, Ken.

076 31 51 Mattingly (onboard): Okay. I'm coming. Well, we're not gonna be directly over it until about 34, which is two and a half minutes.

076 32 17 Duke (onboard): You wouldn't believe all the particles we've got.

076 32 20 Mattingly (onboard): Look at that one. Real pretty.

076 32 31 Duke (onboard): I'm gonna let you get the [garble] I'll get the [garble]

076 32 40 Mattingly (onboard): Well, it's not clear to me we're gonna get anything here.

076 32 45 Duke (onboard): That's really spectacular. Oh, this is beautiful! Contrast.

076 33 08 Duke (onboard): H2 purge, Master Alarm.

076 33 10 Young (onboard): [Garble] that one.

076 33 19 Duke (onboard): See it coming, Ken?

076 33 21 Mattingly (onboard): Get these. I'm not sure it's - Harry [?] wants pictures of stuff like that [garble]. Get one here of this - these guys right here in the bottom of this thing. That should be [garble].

076 33 43 Duke (onboard): Look at the depth of that crater!

076 33 46 Duke (onboard): Except for the full Sun, it makes it look very - very...

076 33 49 Young (onboard): A lot deeper than it is.

076 33 59 Mattingly (onboard): [Garble] picture.

076 34 01 Duke (onboard): [Garble] on?

076 34 03 Mattingly (onboard): No. Thank you.

076 34 09 Young (onboard): Here's where they turn into hills.

076 34 15 Mattingly (onboard): [Garble] take a couple of pictures here [garble]. Excuse me.

076 34 26 Duke (onboard): Sure.

076 34 42 Young (onboard): There's that central peak in Icarus.

076 34 48 Mattingly (onboard): Have you got Icarus?

076 34 50 Young (onboard): Right out there on the right. You didn't see that, Charlie.

076 34 54 Duke (onboard): Oh yeah, I see it, It's taller than a - There it is. Right there. See it?

076 35 01 Young (onboard): It isn't really taller,

076 35 04 Duke (onboard): Right out here. Right on - almost on [garble] horizon.

076 35 07 Mattingly (onboard): Yeah.

076 35 31 Mattingly (onboard): Okay, Charlie [garble].

076 35 47 Young (onboard): Why does it look rounder coming around this way than it does when you go into the terminator; it looks straight on the other side.

076 35 54 Mattingly (onboard): There's some suspicion that there's a different material.

076 35 58 Young (onboard): All right. Just wanted to ask [garble]. Did I say the middle of Icarus looks like a big [garble] volcano? Couldn't.

076 36 28 Mattingly (onboard): What did you call it? Icarus?

076 36 30 Young (onboard): Yeah.

076 36 53 Duke (onboard): H2 purge, Master Alarm [garble].

076 37 09 Mattingly (onboard): Let's see, we're about 37:06 and there's -

076 37 34 Duke (onboard): What's a flashing 37 doing there?

076 37 38 Young (onboard): Ken will figure it out for you.

076 38 11 Young (onboard): [Garble] out there.

076 38 29 Young (onboard): Looking at the Moon hurts my head. I won't look at it. There's too much down there I don't understand.

076 38 45 Young (onboard): Charlie, just keep [garble] on the book.

076 38 48 Duke (onboard): That's why I'm purging the fuel cell.

076 38 50 Young (onboard): Oh.

076 39 02 Duke (onboard): I tell you, when we get down to eight miles, we're gonna really look like we're down among them.

076 39 08 Young (onboard): Sure are.

076 39 16 Duke (onboard): What PTC [garble], Ken?

076 39 20 Mattingly (onboard): Yeah [garble].

076 39 39 Mattingly (onboard): Okay. Get back here, Charlie.

[Beginning Lunar Rev 2 at 076 40]

076 40 32 Mattingly (onboard): Okay. I guess I can turn that purge - that waste water dump off.

076 40 38 Young (onboard): Stuff is coming out, Ken.

076 40 40 Mattingly (onboard): It is?

076 40 41 Young (onboard): Yeah.

076 40 42 Mattingly (onboard): Okay. Our waste off.

076 40 57 Duke (onboard): [Garble].

076 41 20 Mattingly (onboard): Okay; we get the AOS at -

076 41 27 Young (onboard): It really fires thrusters [garble].

076 41 33 Mattingly (onboard): [Garble] firing thrusters.

076 41 36 Young (onboard): Uh-huh.

076 41 37 Mattingly (onboard): Yeah. What do you - what made the comment that you said was really firing one of the thrusters?

076 41 43 Young (onboard): [Garble].

076 41 44 Mattingly (onboard): Oh.

076 42 18 Duke (onboard): [Garble].

076 42 40 Young (onboard): [Garble]?

076 42 41 Duke (onboard): Yeah.

076 42 42 Young (onboard): Well, I don't know. I don't know.

076 42 55 Young (onboard): [Garble].

076 43 03 Mattingly (onboard): They all look different to me when I go hanging upside down.

076 43 06 Duke (onboard): [Garble].

076 43 07 Mattingly (onboard): I know they're not supposed to, but they sure do.

076 43 08 Duke (onboard): Sure do [garble].

076 43 13 Mattingly (onboard): Look at those little tracks down there running in between these two craters.

076 43 52 Duke (onboard): [Garble] big blocks [garble].

076 43 59 Young (onboard): Seen with the naked eye from 60 miles, they've got to be big [garble].

076 44 03 Duke (onboard): They're really big.

076 44 05 Mattingly (onboard): Which one are you looking at?

076 44 06 Duke (onboard): [Garble].

076 44 07 Mattingly (onboard): Oh.

076 44 10 Duke (onboard): And it has a ray [garble].

076 44 13 Young (onboard): I have to agree that the back side is rather monotonous looking, although I'm sure each one of these craters tells us something, if you're smart enough to know what's going on.

076 44 24 Mattingly (onboard): Wish I could clean this window.

076 44 26 Young (onboard): Isn't that terrible? Wonder how that happened?

076 44 30 Mattingly (onboard): I don't know. It's on the outer pane.

076 44 32 Young (onboard): Yeah. Inside of the outer pane.

076 44 35 Mattingly (onboard): Yep. It really makes a difference with the binocs.

076 44 39 Young (onboard): Yeah.

076 44 45 Mattingly (onboard): Man, those are huge features.

076 45 02 Young (onboard): What gets me is the ridge - is the - is the ridge line rou - around [garble] Man, there is just not a flat place anywheres. Do we go over Gagarin?

076 45 16 Mattingly (onboard): No.

076 45 17 Young (onboard): I didn't think so. We're coming up on something like Mendeleev now? Probably?

076 45 25 Mattingly (onboard): Uh -

076 45 28 Young (onboard): That big flat thing right there.

076 45 30 Mattingly (onboard): Looks about right.

076 45 41 Young (onboard): You want to get a picture of the Sea of Moscow? Anybody gotten any good pictures of it?

076 45 47 Mattingly (onboard): [Garble] we have enough Sim.

076 46 31 Mattingly (onboard): AOS? Maybe we should turn this thing off before AOS.

076 46 38 Duke (onboard): The dump?

076 46 39 Mattingly (onboard): Yeah [garble]....

076 46 40 Duke (onboard): Am I looking up north for that?

076 46 43 Young (onboard): You're looking up north. Yeah, you're looking north.

076 46 48 Mattingly (onboard): Is there still stuff coming out of our dump?

076 46 50 Young (onboard): No. It's about to stop.

076 46 52 Mattingly (onboard): Okay.

076 47 20 Young (onboard): Want me to get a picture of it on the right?

076 47 22 Mattingly (onboard): Sure.

076 47 23 Young (onboard): It really makes a - Give - give me a thing.

076 47 25 Duke (onboard): [Garble].

076 47 27 Mattingly (onboard): Okay.

076 47 28 Young (onboard): What should I take it at?

076 47 30 Mattingly (onboard): I don't know, John, I'll have to go and see, here.

076 47 33 Young (onboard): This can't use 250 at f/11?

076 47 35 Mattingly (onboard): I'd better dump it.

076 47 38 Young (onboard): Okay.

076 47 40 Mattingly (onboard): I ain't sure that's the right thing, but I know it ...

076 47 44 Young (onboard): This is probably about right for right in here.

076 47 47 Mattingly (onboard): Where did my little wheel go?

076 47 51 Duke (onboard): Here's one right here, Ken.

076 47 52 Mattingly (onboard): [Garble] Thank you. Well (laughter) -

076 47 56 Young (onboard): Will a 250-millimeter lens get it?

076 47 58 Mattingly (onboard): John, I don't - I can't see through you, I don't know. But I would think that on the horizon you get most anything because...

076 48 05 Young (onboard): Yeah, but that's a long ways out.

076 48 06 Mattingly (onboard): [Garble].

076 48 13 Young (onboard): No, I'll do it [garble].

076 48 16 Mattingly (onboard): [Garble] Ten-year medals for free.

076 48 25 Young (onboard): [Garble] tracking that out [garble].

076 48 26 Mattingly (onboard): [Garble] Right?

076 48 33 Duke (onboard): This is the most unique crater I've ever seen; the one right here with the black rim. It's all white except for the rim. See that bright crater.

076 48 42 Mattingly (onboard): Yeah, yeah. That's - that big crater is Chaplygin and the...

076 48 45 Young (onboard): Okay. That was the Sea of Moscow. Excuse me.

076 48 49 Mattingly (onboard): Okay.

076 48 50 Young (onboard): Whatever that means.

076 48 52 Duke (onboard): Take any good pictures yet?

076 48 53 Mattingly (onboard): Yes [garble].

076 48 56 Young (onboard): [Garble] handle it [garble] Soviets [garble] eat their heart out [garble].

076 49 04 Mattingly (onboard): If they come, I bet they don't quit.

076 49 09 Young (onboard): [Garble]...

076 49 11 Mattingly (onboard): You - you -

076 49 12 Young (onboard): ... [garble].

076 49 18 Duke (onboard): You know, this Window 5 is a little foggy on the outer pane, too.

076 49 21 Young (onboard): Yeah.

076 49 22 Duke (onboard): Just a little.

076 49 32 Mattingly (onboard): What frame number was that?

076 49 36 Young (onboard): That frame number was number 4 [garble]. Number 4.

076 49 50 Duke (onboard): Now, we're gonna be able to see earthrise right now.

076 49 59 Mattingly (onboard): [Garble].

076 50 00 Duke (onboard): You want to get a picture of earthrise?

076 50 03 Young (onboard): Well, probably not. There's probably only been ten million pictures already took of it. But if you're looking for PR, like the Sea of Moscow or some other thing [garble].

076 50 19 Mattingly (onboard): What'd you take it at, 1/250, f/11 - f/87 John?

076 50 25 Young (onboard): I put it 1/250 at f/11. f/8 was probably a better choice.

076 51 04 Mattingly (onboard): Okay, [garble] Let me get it set.

076 51 08 Duke (onboard): [Garble].

076 51 09 Young (onboard): Yeah, Pitch, 10, and Yaw, 355. We pick them up on Omni C, and then we'll shift over.

076 51 14 Duke (onboard): Yeah, we can do that.

076 51 32 Mattingly (onboard): Okay. And in a few minutes, we're gonna do our systems checks. Huh?

076 51 38 Duke (onboard): [Garble].

076 51 39 Mattingly (onboard): Yeah. Okay, we're gonna do our systems checks for DOI. Another one of these things we can get started early.

076 51 57 Mattingly (onboard): Dang it [garble]. window screwed up like that? It's really [garble].

076 52 05 Duke (onboard): I can't believe it.

076 52 08 Young (onboard): What's that, Charlie?

076 52 09 Duke (onboard): That that's the fu - (laughter) - tape recorder - that that's the Moon down there.

076 52 17 Young (onboard): It's the whole thing.

076 52 19 Duke (onboard): The whole thing. I thought we'd see Tsiolkovsky this rev. Oh, yeah.

076 52 31 Mattingly (onboard): It comes again.

076 52 32 Duke (onboard): That right? Oh, yeah.

076 52 36 Young (onboard): Yeah, I imagine when the Soviets start up here, they'll set up their lunar base in the first place; stay for a while.

076 52 46 Mattingly (onboard): Now that's really frustrating.

076 52 48 Duke (onboard): I can't understand what [garble] doing out over that way.

076 52 51 Young (onboard): Man, there sure is a lot of things up here that I don't understand. Look at that big crater down south with the rocks in it. Or - you - you're looking right at it. It's got layers of walls there.

076 53 05 Mattingly (onboard): Which direction? That bright one there?

076 53 06 Young (onboard): Yeah, the bright one. With the lay - it's got layers of walls in it. I don't know what the name of that one is. It looks like - you get a little higher Sun angle, it looks like anthracite coal laid in against chalk. It doesn't look that way right now.

076 53 21 Duke (onboard): It's really a unique crater chain down there. Really - [garble] south of track,

076 53 29 Young (onboard): [Garble].

076 53 36 Mattingly (onboard): Okay, is that -

076 53 37 Young (onboard): Yeah, that's [garble] right there.

076 53 46 Mattingly (onboard): Well, that's not - those crater chains there. Let's see, we just passed [garble] probably?

076 53 56 Young (onboard): I just can't get it.

076 53 58 Mattingly (onboard): Try it again. You got King? Isn't that King back there?

076 54 05 Duke (onboard): [Garble]?

076 54 06 Young (onboard): Right out to the left.

076 54 08 Duke (onboard): I don't see it. It may be in your window.

076 54 09 Young (onboard): Yeah.

076 54 23 Mattingly (onboard): Way out there.

076 54 24 Young (onboard): Where?

076 54 25 Mattingly (onboard): Way out there, yeah.

076 54 26 Young (onboard): Okay, I'm looking - right there.

076 54 30 Mattingly (onboard): Yeah. I can see it.

076 54 33 Duke (onboard): .., What do you think about King?

076 54 37 Duke (onboard): See, it's got kind of funny little things in it...

076 54 39 Duke (onboard): (Sneeze)

076 54 40 Mattingly (onboard): [Garble].. that - things that look like lava flows -

076 54 43 Duke (onboard): (Sneeze).

076 54 45 Young (onboard): But they've got to be lava flows running down the side of that mountain there...

076 54 47 Duke (onboard): (Sneeze)

076 54 48 Young (onboard):... whatever made that crater.

076 54 50 Mattingly (onboard): It's pretty big.

076 54 51 Duke (onboard): Oh, yeah, yeah, yeah. It's got to be lava flows.

076 54 54 Mattingly (onboard): Okay. These crater chains running down here should lead down to Tsiolkovsky.

076 55 02 Young (onboard): Yeah [garble].

076 55 05 Duke (onboard): They do! Aha! There it is! [garble].

076 55 11 Young (onboard): Okay, there's [garble].

076 55 14 Mattingly (onboard): Oh, hey, that is pretty...

076 55 15 Duke (onboard): Isn't that something? [garble]...

076 55 16 Mattingly (onboard): Isn't that a beauty?

076 55 17 Young (onboard): Yeah, dang.

076 55 18 Mattingly (onboard): That - that must be one of the more spectacular things that [garble] here.

076 55 22 Young (onboard): Oh, you bet.

076 55 26 Mattingly (onboard): Well, I'd cancel the earthrise here.

076 55 28 Young (onboard): Okay. Okay.

076 55 31 Mattingly (onboard): What a treat. And so many things, I can't get. I'm like a little kid with ice cream; I don't know where to start.

076 55 37 Young (onboard): Right.

076 55 41 Duke (onboard): Oh, these windows are just really frosting.

076 55 45 Young (onboard): Should be AOSing here pretty quick.

076 55 47 Duke (onboard): Yeah.

076 55 48 Young (onboard): Shouldn't we, Charlie?

076 55 50 Mattingly (onboard): Not until we get earthrise.

076 55 54 Young (onboard): [Garble] what I mean. We were talking to them about King the last time we came across here.

076 56 01 Mattingly (onboard): We should get AOS at King. Now is that Thesaur [?]?

[A search of Lunar atlases cannot locate a feature called Thesaur. However, the track of Apollo 16 puts it to the north of Pasteur at this time. It seems likely that this is a mis-transcription. The following references to Thesaur have been amended to Pasteur.]

076 56 03 Young (onboard): No, that's not Pasteur. There's Pasteur. Pasteur's right here.

076 56 09 Duke (onboard): Ken, is it that little bright one right down there south of King?

076 56 11 Mattingly (onboard): That's what I was just wondering, but I think that Pasteur is supposed to be bigger than that.

076 56 17 Young (onboard): [Garble] could be [garble] the rays probably coming out of the King.

076 56 20 Duke (onboard): Yeah.

076 56 21 Young (onboard): It looks like it goes in the same sort of a [garble.] See those bright things on the bottom of it?

076 56 25 Duke (onboard): Yeah [garble].

076 56 38 Young (onboard): [Garble] know what this [garble] and how all this happened.

076 56 43 Mattingly (onboard): Look at this - I never noticed this before. We got a crater chain. It goes from here, right straight to the horizon.

076 56 48 Duke (onboard): Yeah. Right along the track.

076 56 50 Mattingly (onboard): Yeah? I never noticed that.

076 56 54 Young (onboard): Well, you ain't been here but a few hours.

076 56 57 Crew (onboard): (Laughter)

076 56 59 Young (onboard): Right straight to the horizon?

076 57 00 Mattingly (onboard): Yeah. There's a - it starts down here.

076 57 02 Duke (onboard): South of Pasteur.

076 57 04 Mattingly (onboard): And these two - see these two craters?

076 57 05 Young (onboard): Yeah.

076 57 06 Mattingly (onboard): It's almost right in the center of this window. Starts - And these two craters are together.

076 57 10 Young (onboard): Yeah.

076 57 11 Mattingly (onboard): And then it cuts down here and it goes towards the horizon and stops at the mare.

076 57 22 Duke (onboard): Better get ready to [garble].

076 57 25 Crew (onboard): (Cough)

Public Affairs Officer This is Apollo Control at 76 hours, 57 minutes. We're now less than one minute from the scheduled time of reacquiring Apollo 16. The spacecraft now in its second revolution 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 [the] 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 approximately 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 [109 by 20 kilometres]. 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 approximately 170 by 58 nautical miles [315 by 107 kilometres] and we've just had the call [of] acquisition of signal so we'll stand by for a call to the crew.

076 57 43 Duke (onboard): While we were - while we were [garble] I guess the weight was 25 pounds, ten percent.

076 57 58 Mattingly (onboard): Man, it's frustrating when one of these things pops those things in and out. Wonder what it is that makes it do this; it doesn't do it when you look at it. It only does it when you hit the binoculars. One other picture.

076 58 09 Duke (onboard): Waste water dump still open?

076 58 11 Young (onboard): No. Better not be [garble] now.

076 58 16 Mattingly (onboard): No, I don't think the waste water dump [garble] particles?

076 58 20 Duke (onboard): There it comes; there it comes, you guys!

076 58 23 Young (onboard): Oh, looky at that.

076 58 24 Duke (onboard): Isn't that spectacular?

076 58 26 Young (onboard): Man, instant earthrise!

076 58 28 Mattingly (onboard): Look at that guy creep up.

076 58 32 Crew (onboard): (Applause)

076 58 34 Mattingly (onboard): I don't care if we got 10,000...

076 58 35 Young (onboard): Hello there, Houston.

076 58 36 Mattingly (onboard):... we're going to have 10,001 [garble] of these (laughter) [garble]...

076 58 38 Duke (onboard): Hurry, quick!

076 58 42 Young (onboard): Take it? Got to go to Reacq and you're at - High Gain [garble]...

076 58 48 Duke (onboard): No. No [garble].

076 58 51 Mattingly (onboard): Houston, 16.

076 59 02 Mattingly (onboard): Beautiful.

076 59 06 Duke (onboard): Want me to get them on Omni first?

076 59 08 Mattingly (onboard): Yeah.

076 59 11 Young: Houston, 16.

076 59 11 Young (onboard): We had S-band Acquisition and S-band High Gain.

076 59 13 Hartsfield: Hello, 16; Houston. How do you read?

076 59 15 Duke (onboard): Yeah. Wrong page.

076 59 17 Young: Roger. Read you 5 by, Henry. We just got the 10,000th picture of a beautiful earthrise.

076 59 22 Duke (onboard): Ain't there yet. Over here.

076 59 24 Hartsfield: Outstanding.

076 59 33 Young: This is really some place.

076 59 36 Mattingly: 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.

076 59 58 Mattingly (onboard): That is - man, that is...

077 00 00 Duke (onboard): Isn't that beautiful?

077 00 02 Mattingly (onboard): But you know, some of those photographs around the office that people say are - are no good, that looks the same color to me.

077 00 09 Duke (onboard): Yeah. I don't think that photo fidelity's true.

077 00 20 Mattingly (onboard): Man (laughter) -

077 00 21 Duke (onboard): [Garble] how long before we get to [garble].

077 00 24 Mattingly (onboard): About - ten minutes.

077 00 28 Duke (onboard): [Garble] out the [garble].

077 00 29 Mattingly (onboard): [Garble] Yeah.

077 00 30 Hartsfield: 16, Houston. Were you trying to transmit? We heard a little noise on the loop there and looks like our data was dropping in and out; looks good now.

077 00 40 Mattingly: Negative. We weren't trying to say anything, Hank.

077 00 40 Mattingly (onboard): He probably didn't get our initial call.

077 00 45 Hartsfield: Okay.

077 00 56 Young: We just can't find any words. Everybody's peeking out the window here.

077 01 00 Hartsfield: Roger.

077 01 03 Young: We got all the dumps completed, and we're - all the dumps are secure.

077 01 11 Hartsfield: Copy.

[Break in CM tape to 077 12 46]

077 01 15 Duke: And I got some pictures on the back side of - Icarus and the - and a black of the Sea of Moscow.

077 01 40 Duke: And the material to the north of us at the terminator, we don't think we got [garble] for.

Public Affairs Officer Those enthusiastic descriptions of the lunar surface have come from all three crewmen. Most recently we heard from John Young and Charlie Duke. The noise on the communication circuit at the present time is due to the fact that we are using one of the omni antennas on board the spacecraft for communications. The crew will be switching over to the high gain antenna soon and that should quiet things down a bit.

077 09 50 Duke: Okay, Houston, we have you on the High Gain. How do you read? Over.

077 09 55 Hartsfield: Okay; I read you five by five.

077 10 00 Duke: Okay, Hank, I'm turning the Pan Camera to Mode, Standby - Power, on.

077 10 03 Hartsfield: Roger.

077 11 54 Duke: Hank - I'm sure they have been described before, but the most - to me, the most unique craters up here - are two that we're just going over now - that - her ejecta blanket is completely white with white interior, but with a black rim to them.

077 12 46 Mattingly (onboard): Right down in there.

077 12 47 Duke (onboard): You know, that SPS comes on a lot...

077 12 48 Young (onboard): Right there?

077 12 49 Duke (onboard): ... [garble] than I thought.

077 12 50 Mattingly (onboard): [Garble] Descartes.

077 12 51 Duke (onboard): I thought it would be a big bang, but it's a slow buildup [garble].

077 12 56 Mattingly (onboard): It won't be - the next one will be pretty slow, but the one you feel after that will be a surprise.

077 13 01 Duke (onboard): I bet. PDI. We get a plane change on board, too, don't we?

077 13 10 Young (onboard): Yeah.

077 13 31 Mattingly (onboard): Holy smoke. Oh. Here's an eat period. Filled with little things to do. Shh. Gosh.

[CM transcription ceases until 078:28:58

077 18 17 Duke: Houston, 16.

077 18 20 Hartsfield: Go ahead.

077 18 26 Duke: Hey, Hank, how do the SPS data look?

077 18 28 Hartsfield: Okay, we were just talking about that, Charlie. Apparently, we had a real nominal burn. Our data down here showed a burn time of six 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 pressure lights that came on, we warned you earlier to expect that, due to the pressure surge of the tanks pressurizing, we - you were right on the 200-psi limit - that triggered it. The second pressure light you got, which is apparently still on, is due to heat soak back into the tank. So it's not unexpected either.

077 19 20 Duke: Okay, fine. We passed that word on to you about the light. Not that we weren't expecting it, but just to tell you what had happened.

077 19 28 Hartsfield: Okay.

077 19 43 Hartsfield: 16, Track Mode Auto on High Gain.

077 19 52 Young: Okay. You got it.

077 21 06 Young: Houston, 16. Over.

077 21 08 Hartsfield: Go ahead.

077 21 17 Young: That crater Icarus - we got the profile picture of. It's a big round crater and it has real steep walls, and the central peak is a - the central peak is a little above the crater walls, and you'll see that profile when you get the picture back. But the shape of the central peak is such that the only Earth analog I've ever seen that looked like it was sort of a shield volcano. I never saw anything like that in the - Now, I'm not saying the whole thing is not an impact, but that central peak is really unusual.

077 21 58 Hartsfield: Roger. We copy, and we're also through with the Pan Camera - you can go Power Off on that.

077 23 25 Duke: Houston, apparently this line of secondaries down here that cross the mare - gives you the impression that there have been a couple of great big chickens been walking across there.

077 23 37 Hartsfield: Roger.

077 23 40 Young: That - that was courtesy of Charlie Duke, our airborne geologist and chicken farmer.

077 23 52 Hartsfield: Roger. Maybe you better watch your step.

077 23 58 Young: I'm watching.

Public Affairs Officer Those last two picturesque descriptions first of the crater Icarus with it's unusual central peak and second of the chicken tracks were from John Young.

077 31 45 Mattingly: Hank, you can tell Farouk that -those smooth areas we thought we saw around Isidorus and Capella are indeed uniquely different in texture. They are quite smooth. We'll get a chance to play with them later.

077 32 04 Hartsfield: Hey, that sounds real interesting, Ken.

077 32 21 Hartsfield: How are your systems checks coming?

077 32 26 Mattingly: Roger; Hank. We've already finished those.

077 32 28 Hartsfield: Okay.

Public Affairs Officer Ken Mattingly's reference on that last observation was to Farouk Albaz, one of the geologists who has worked very closely with the crew and particularly with Mattingly in training him for the orbital photography and recognition of geologic landmarks on the Moon.

077 34 03 Mattingly: Henry, the amount of terminator movement in one rev is kind of dramatic up here. Last time around, Descartes just barely showed as a crater - but showed very dramatically - and now it's - as it moves out it's starting to lose 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 Smoky end Stone Mountains. They - right now - look like they have a very similar texture.

077 34 47 Hartsfield: Roger; we copy.

077 37 36 Mattingly: Hank, it sure looks like we can see Gator and Palmetto from here. It's almost straight down.

077 37 42 Hartsfield: Does it look like the map?

077 37 47 Mattingly: Well, that stuff around the outside sure doesn't look like it did at high Sun.

077 38 04 Hartsfield: Apollo 16, Houston. If you will give us Accept, we'll up-link state vector and target load.

077 38 14 Young: You have it.

077 39 10 Hartsfield: Apollo 16, Houston. I have your DOI Pad, your map update, and landmark pad whenever you are ready.

077 39 39 Duke: Okay, go ahead [garble] with the DOI Pad.

077 39 43 Hartsfield: Roger. DOI, SPS/G&N; 41441; plus 1.87, minus 0.71; 078:33:44.39; Noun 81: minus 0205.3, all zips, minus 0045.5; 000, 274, 000; 0058.5, plus 0010.3; 0210.3, 0:24.2, 0203.8; sextant star: 22, 204.89 :, 21.7. The rest of the pad's NA. Set stars Sirius and Rigel; 131; 071; 014. Four jets 15 seconds. End of pad.

077 41 48 Duke: Okay, copy. DOI, SPS/G&N; 41441; plus 1.87, minus 0.71; 078:33:44.39; minus 02053, plus all balls, minus 0045.5; 000, 274, 000; 0058.5, plus 0010.3; 0210.3, 0:24.2, 0203.8; 22, 204.89, 21.7. Rest of the pad is NA. Sirius and Rigel; 131; 071; 014. Four jets, 15 seconds.

077 42 35 Hartsfield: Good readback, Charlie.

077 43 24 Hartsfield: I have your map update Rev 3 whenever you're ready, Charlie. It's 79:05 in the Flight Plan.

077 43 32 Duke: All right, why don't you give me the map update and the Landmark Pad?

077 43 36 Hartsfield: All righty. Map update: LOS: 78:23:17; 78:48:09; 79:10:25. Landmark Pad is T-horizon: 79:34:11; 79: 36: 22.

077 44 23 Duke: Roger; copy. Map update of 078:23:17; 078:48:09; 079:10:25. Landmark tracking is 79:34:11; 79:36:22.

077 44 41 Hartsfield: Good readback.

077 45 56 Hartsfield: 16, the computer is yours, and I have your TEI-5 Pad for the updates book.

077 46 05 Mattingly: Okay, Hank, before we do that - Looking at the change to the Flight Plan here, we got to load the Verb 48 to put in the proper DAP, and [garble] to start 509, and then go to the P52. Can we go ahead and stop · the maneuver now and will this attitude clear enough things so we can get a P52 in there?

077 46 29 Hartsfield: Stand by.

077 46 34 Mattingly: I'm sorry; I didn't copy that.

077 46 35 Hartsfield: Roger. Stand by a minute, Ken, I'll have FAO check.

077 46 42 Mattingly: Thank you. I was worried about getting in the same problem we get into after undocking tomorrow, where it might take a special angle.

077 46 52 Hartsfield: Roger. Understand.

077 47 10 Hartsfield: Apollo 16, Houston. FAO says this is a good attitude.

077 48 39 Hartsfield: 16, Houston. Are you ready for the TEI-5 pad yet?

077 48 43 Duke: Roger; go ahead.

077 48 45 Hartsfield: Okay, pad follows: TEI-5, SPS/G&N; 39838; plus 0.61, plus 1.19; 084:31:41:36; Noun 81: plus 3525.2, plus 1247.3, minus 0086.8; 182, 056, 022; the rest is NA. Set stars: Sirius, Rigel; 131; 071; 014. Two jets, 17 seconds. Other: l, burn undocked; 2, assumes DOI; 3, landing site REFSMMAT.

077 50 36 Duke: Roger. TEI-5, SPS/G&N; 39838; plus 0.61, plus 1.19; 084:31:41:36; Noun 81: plus 3525.2, plus 1247.3,minus 0086.8; 182, 056, 022. Rest of pad is NA. Sirius and Rigel; 131; 071; 014. Two Jets, 17 seconds. Other: 1 is burn undocked; 2, assumes DOI; 3, landing site REFSMMAT.

077 51 13 Hartsfield: Good readback, Charlie.

Public Affairs Officer This is Apollo Control at 77 hours, 54 minutes. 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 seconds. The maneuver will be performed using the spacecraft Service Propulsion System engine. It will be primarily a retrograde burn resulting in slowing the spacecraft by about 203.8 feet [62.1 metres] per second or about 136 miles [219 kilometres] per hour. And as a result of that, we expect the orbit to be changed to 58.5 by 10.3 nautical miles [108.3 by 19.1 kilometres]. This is the orbit from which the spacecraft will begin the Powered Descent to the lunar surface on the 13th revolution.

077 55 21 Mattingly: Houston, do you want to take a look at our rotated vector in P40 before we start our maneuver?

077 55 27 Hartsfield: Roger. Stand by.

077 56 39 Hartsfield: Your P30 looked good, Ken.

077 56 46 Mattingly: Okay. The question was, do you want to take a look at the rotated vector in P40 before we start our maneuver, or can we go ahead and start the maneuver?

077 57 20 Young: Houston, did you miss the question?

077 57 25 Hartsfield: Negative, but we're having trouble finding an answer.

077 57 30 Young: Okay.

077 57 48 Hartsfield: 16, Houston. Go ahead and call P40, then maneuver.

077 58 02 Mattingly: Okay. Have you got enough look now?

077 58 19 Hartsfield: He's looking at it now, Ken.

077 58 27 Hartsfield: You got a good vector, Ken. Go ahead.

Public Affairs Officer This is Apollo Control at 78 hours, 2 minutes. At the present time the Apollo 16 crew is in the process of putting the spacecraft in its proper attitude for the Descent Orbit 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 [108.3 by 19.1 kilometres]. The current orbit is 169.9 by 58.1 [314.6 by 107.6 kilometres].

078 06 31 Hartsfield: 16, give us Omni Delta.

078 06 42 Young: Okay, you got it?

078 06 45 Hartsfield: Roger.

Public Affairs Officer 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 Orbit 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 shortly.

078 09 49 Hartsfield: 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.

078 10 02 Mattingly: Okay.

Public Affairs Officer This is Apollo Control, we're coming up now on nine minutes until loss of contact with Apollo 16. About 19˝ minutes away from the time the crew will be performing 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 third revolution, this burn is a very critical maneuver which must be performed in very pre--within very precise limits and particularly in the shutdown which the computer will signal. An overburn of slightly more than one 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 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 trajectory 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, eight seconds in the Flight Plan if it is required and would place the spacecraft 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.

078 16 24 Young: Okay, Houston. The gimbal motors are on.

078 16 27 Hartsfield: Roger, John.

078 19 02 Mattingly: Okay, Houston. We're going to do the gimbal drive check.

078 19 06 Hartsfield: Roger. We're watching.

078 19 27 Mattingly: Okay; the gimbals are trimmed.

078 19 31 Hartsfield: Roger; copy.

078 20 02 Mattingly: And 509 is killed.

078 20 07 Hartsfield: Roger.

078 21 15 Hartsfield: 16, Houston. We're about two minutes from LOS.

078 21 25 Hartsfield: Roger. Two minutes from LOS.

078 21 37 Hartsfield: About 12 - 12 from the burn.

078 21 39 Young: Roger.

Previous Index Next
Day Four Part One:
Arrival at the Moon
Journal Home Page Day Four Part Three:
Descent Orbit Insertion,
Revs Three to Nine