Bruce McCandless (CAPCOM)

This is Houston. I copy a transmission calling Houston; all else was broken up. Over.

Bruce McCandless (CAPCOM)

Neil, this is Houston. If you read, we suggest you unstow one PLSS antenna so we can have communications. Over.

Bruce McCandless (CAPCOM)

Neil, this is Houston. We seem to be reading you now. How do,you read us? Over.

Neil Armstrong (CDR)

Houston, this is Tranquility. How do you read?

Bruce McCandless (CAPCOM)

Tranquility Base, this is Houston. Loud and clear. How us?

Neil Armstrong (CDR)

Loud and clear. We're in the process of switching over to LM COMM here.

Bruce McCandless (CAPCOM)

Tranquility Base, this is Houston. We'd like to verify your steerable antenna in track mode slew. We're going to do a communications handover here on Earth. Over.

Buzz Aldrin (LMP)

Roger. That's affirmative. We're in track mode slew.

Bruce McCandless (CAPCOM)

Columbia, Columbia, this is Houston. Over.

Michael Collins (CMP)

Roger, Columbia on Charlie. How do you read?

Bruce McCandless (CAPCOM)

Roger, Columbia. This is Houston. Reading you loud and clear on OMNI Charlie. The crew of Tranquility Base is back inside their base, repressurized, and they're in the process of doffing the PLSS's. Everything went beautifully. Over.

Bruce McCandless (CAPCOM)

And we'd like to get P00 and ACCEPT from you. We have a state vector uplink. And, after that, we'd like you to realign your platform to the new REFSMMAT that we sent up a REV or two ago. Over.

Michael Collins (CMP)

Roger. Understand. You want a option 1, P52 option 1.

Bruce McCandless (CAPCOM)

Columbia, this is Houston. We're going to uplink you a new state vector, and then we'll send the REFSMMAT up again, because sending the state vector up will wipe out the one that you have on board; and then you can do a P52 option 1. Over.

Bruce McCandless (CAPCOM)

Columbia, this is Houston. Do you read? Over.

Michael Collins (CMP)

Roger, Houston. Columbia's reading you.

Bruce McCandless (CAPCOM)

Okay, Columbia. We've completed the uplink; the computer is yours. You can go BLOCK; however, we'd like you to hold off on the P52 option 1 align until after you've passed landing site 2; and we're requesting that you perform another P22 and attempt to find the LM this pass. I've got some numbers for you when you're ready to copy. Over.

Bruce McCandless (CAPCOM)

Roger, Columbia. P22 landmark ID is lunar module—make that Tranquility Base; P1, 112 25 08; P2, 112 30 17, 4 nautical miles south. Time of closest approach, 112 31 52; shaft 357. 051, trunnion 047. 432, roll zero, pitch 250, yaw zero. Readback. Over.

Bruce McCandless (CAPCOM)

Columbia, this is Houston. Did you copy my P22 update? Over.

Bruce McCandless (CAPCOM)

Columbia, this is Houston. Did you copy my P22 PAD?

Bruce McCandless (CAPCOM)

Columbia, this is Houston. Do you copy my PAD? Over.

Michael Collins (CMP)

Negative, Bruce. Just give me the latitude and longitude over 2, altitude, and the grid squares. Never mind the other. You're broken up.

Michael Collins (CMP)

Well, that is, if you have new information. Otherwise, I'll just use the old numbers.

Bruce McCandless (CAPCOM)

No, wait a minute. We've got new information.

Bruce McCandless (CAPCOM)

Tranquility Base, this is Houston. Can you give us some idea of how you're progressing on the PLSS doffing and preparation for DEPRESS?

Neil Armstrong (CDR)

Roger, Houston. Tranquility Base. We're in the process of using up what film we have, and I'm just getting ready to change the primary ECS canister. Over.

Bruce McCandless (CAPCOM)

Roger, Tranquility. We'd like to hold off as long as possible on the lithium hydroxide canister. Make that one of the last things you do in getting ready for the DEPRESS, if you can. Over.

Neil Armstrong (CDR)

Roger. We're planning on doing that. I was just wondering how much longer we want to wait, though. We've probably got another half an hour's worth of picture taking, and I guess we could run through an eat cycle and then change the canister, and then DEPRESS. Over.

Bruce McCandless (CAPCOM)

Roger. That sounds fine to us.

Neil Armstrong (CDR)

Well, it'll be a little crowded in here for a while.

Michael Collins (CMP)

Houston, Columbia. You got the new coordinates?

Bruce McCandless (CAPCOM)

Columbia. This is Houston. Go ahead.

Michael Collins (CMP)

Roger, Have you got the new coordinates for me?

Bruce McCandless (CAPCOM)

Roger. Latitude 00.691—that would be plus 00.691—and longitude over 2 is plus 11.713. The altitude is minus 1.44 nautical miles. Over.

Bruce McCandless (CAPCOM)

Columbia, this is Houston. On latitude, make that plus 00.692, rounding off. Over.

Michael Collins (CMP)

Okay. I read back plus 00.692, plus 11713, and minus 00144. And you have a grid square for me?

Bruce McCandless (CAPCOM)

Columbia. This is Houston. Grid coordinates: Kilo 0.9, 6.3, on LAM 2. Over.

Michael Collins (CMP)

Kilo 0.9 and 6.3. Thank you. One of these grid squares is about as much as you can scan on a single pass.

Bruce McCandless (CAPCOM)

And for your information, Columbia, you're approaching the VHF line of site COMM limit with Tranquility Base. LOS will be at 38 minutes plus 25 seconds. Over.

Bruce McCandless (CAPCOM)

Roger. And we've had to disable the one way MSFN relay owing to a ground site reconfiguration down here. Over.

Michael Collins (CMP)

Okay.

Expand selection down Contract selection up

Spoken on July 21, 1969, 5:47 a.m. UTC (50 years, 1 month ago). Link to this transcript range is: Tweet

Bruce McCandless (CAPCOM)

This is Houston. Go ahead. Over.

Michael Collins (CMP)

Roger. I can't see them.

Bruce McCandless (CAPCOM)

Roger. I guess that takes care of the news for today, Mike.

Bruce McCandless (CAPCOM)

You might be interested in knowing, Mike, that we have gotten reflections back from the laser reflector ray they deployed, and we may be able to get some information out of that a little later.

Michael Collins (CMP)

Roger. I need a very precise position, because I can only do a decent job of scanning maybe one of those grid squares at a time. The area that we've been sweeping covers 10's and 20's and 30's of them.

Bruce McCandless (CAPCOM)

Roger. We understand. This is intended to be your last P22. We don't want to use up too much fuel in this effort. Over.

Michael Collins (CMP)

Roger. How's the fuel coming?

Bruce McCandless (CAPCOM)

Roger. There's no problem fuel wise. It's just that there seems to be a limit to the number of P22's and the number of grid squares you can search over.

Michael Collins (CMP)

Roger. Well, I'll continue this maneuver then to roll 82, pitch 218, yaw zero, if that's okay with you, and do a P52 in that attitude. And that'll be a sleep …

Bruce McCandless (CAPCOM)

Roger. That's fine with us. And P52 in that attitude.

Bruce McCandless (CAPCOM)

Roger. A P52 and then the sleep attitude.

Bruce McCandless (CAPCOM)

Tranquility Base, this is Houston. Over.

Buzz Aldrin (LMP)

Houston, Tranquility Base. Go ahead.

Bruce McCandless (CAPCOM)

Roger. When you all have a free moment, I have your T8 through T12 block data. Over.

Buzz Aldrin (LMP)

Houston, Tranquility Base. Ready to copy.

Bruce McCandless (CAPCOM)

Roger, Tranquility. T8, 114 30 57; T9, 116 29 10; T10, 118 27 23; T11, 120 25 36; T12, 122 23 49. Readback. Over.

Buzz Aldrin (LMP)

Roger. T8, 114 30 57; T9, 116 29 10; T10, 118 27 23; T11, 120 25 36; T12, 122 23 49. Over.

Bruce McCandless (CAPCOM)

Readback correct. Houston out.

Michael Collins (CMP)

Houston, Columbia on high gain.

Neil Armstrong (CDR)

Houston, Tranquility Base.

Bruce McCandless (CAPCOM)

Columbia. Columbia, this is Houston. Over.

Michael Collins (CMP)

Columbia in the high gain.

Bruce McCandless (CAPCOM)

Roger. Reading you loud and clear on the high gain, Columbia.

Michael Collins (CMP)

Roger. Going to P52 attitude. You want a crew status report?

Michael Collins (CMP)

I say again, I am maneuvering to the P52 attitude, and do you want a crew status report?

Bruce McCandless (CAPCOM)

Roger. And go ahead with your crew status report.

Michael Collins (CMP)

Roger. No medication. Radiation 100.16.

Neil Armstrong (CDR)

Houston, Tranquility Base.

Neil Armstrong (CDR)

Roger. The weight of the RCU was 12 ounces. That was by itself without the bag, and the weight of the water from the CDR's PLSS was 12 1/2 ounces. That's reading zero with the bag on.

Bruce McCandless (CAPCOM)

This is Houston. We copy. And, for your information, the new LM weight after jettison of equipment including lithium hydroxide canister is 10837. Over.

Michael Collins (CMP)

Houston, Columbia. Did you copy the P52?

Bruce McCandless (CAPCOM)

Columbia, this is Houston. Affirmative.