Michael Collins (CMP)

Okay. I read back: monitor secondary accumulator quantity; secondary glycol radiator valve, NORMAL for 30 seconds, then to BYPASS. If no decrease in secondary accumulator quantity, secondary glycol to radiator valve to NORMAL. Secondary coolant loop pump, AC 1 or 2. After 3 minutes, verify glycol secondary discharge pressure 39 to 51 psig. Verify secondary evaporator outlet TEMP has changed. Secondary coolant loop pump, OFF. Secondary glycol radiator valve to BYPASS. And what's the reason for the change, Charlie?

Charlie Duke (CAPCOM)

Roger. Stan is concerned that our present procedure as shown in the checklist does not really flow glycol through the radiator, and it—They want to verify that we do not have a plugged secondary radiator. Over.

Michael Collins (CMP)

Okay. They have any abnormal indications in that system, so far?

Charlie Duke (CAPCOM)

Negative. This is the procedure that they came up with. It's just a check, Mike. Everything's looking great to us. Over.

Neil Armstrong (CDR)

Charlie, we'll get back with you on these other changes in a few minutes. Okay?

Charlie Duke (CAPCOM)

Roger, Neil. No hurry. Over.

Charlie Duke (CAPCOM)

11, Houston. We're wondering who's on horn.

Charlie Duke (CAPCOM)

We just had a little music there.

Michael Collins (CMP)

We'll keep you entertained.

Charlie Duke (CAPCOM)

Roger. That was good. You can keep it coming down, 11.

Michael Collins (CMP)

Because it's a special occasion today, Houston. This is the third anniversary of Gemini 10.

Charlie Duke (CAPCOM)

Roger. Happy anniversary.

Buzz Aldrin (LMP)

Houston, Apollo 11. Ready to copy your update.

Charlie Duke (CAPCOM)

Okay, Buzz. The first item is that we have indications that your landing site obliques are not in the proper position. If you'll check, we think that the intermediate scale landing site oblique is stowed in the CSM lunar landmark book. We think that the large scale landing site oblique is stowed in the back of the LM lunar surface map book. Over.

Buzz Aldrin (LMP)

I think I heard you Charlie, but I'm not sure that I understand.

Charlie Duke (CAPCOM)

Roger. According to our stowage list the—the landing site oblique should be in the transfer bag. In—But in the backup set of data, the intermediate scale oblique is in the CSM lunar landmark book, and the large scale oblique is in the back of the LM lunar surface map book; and that's the reason we think that they might be not where you think they are. Over.

Buzz Aldrin (LMP)

Okay. We've got three obliques. The last one is one I asked for recently. It's just a blow up of the second one. The first one is one that's got dotted lines on it, indicating horizon view and 50-degree LPD; and all three of those are in the transfer book. Over.

Charlie Duke (CAPCOM)

Roger. Fine. We were wrong in our—in our backup set. We had those out of place. Looks like the onboard data's good. We just wanted to let you check on that one. We have an update on the APS/DPS fuel card that you place on the panel. It's a typo error. If you'll break out that little card, we've got the—correct that typo error. Over.

Charlie Duke (CAPCOM)

Roger, Buzz. Under the DPS column on the pressure side, you go down to the fourth item, says pressure greater than 150 PTCA should be greater than 65 percent. Over.

Buzz Aldrin (LMP)

Okay. That's greater than 1.8 but less than 65 and greater than 150 for greater than 65.

Charlie Duke (CAPCOM)

That's affirmative. Out.

Charlie Duke (CAPCOM)

And we have three items on the mission rules NO-GO card, if you're ready to copy those. Over.

Buzz Aldrin (LMP)

Okay. I've got the mission rules NO-GO.

Charlie Duke (CAPCOM)

Roger, Buzz. First entry's on the EPS under AC bus A. The line extends all the way to high gate. Actually, the line should read—at DOI it would be NO-GO AC bus A. After that the NO-GO would be both buses. So if you will just pencil in both buses from PDI through high gate, it'll be correct for that line. Over.

Buzz Aldrin (LMP)

Okay. I've got that: AC bus A for DOI and both buses NO-GO for PDI on.

Charlie Duke (CAPCOM)

That's affirmative up until high gate. You can stop at the line in front of the column “5 minutes to low gate”. Now the next line is under the G&C PGNS, pitch and roll GDA's. You can scratch that line completely. Over.

Charlie Duke (CAPCOM)

Okay, Buzz. Last entry is down under RCS, and it's a typo error under the three—in the line “three axis attitude control”. If you proceed to the right at PDI plus 05, you'll see one axis. The line goes all the way to low gate to touchdown. That's incorrect. The line should stop under “5 minutes to low gate”. Over.

Buzz Aldrin (LMP)

Okay. We're stopping that at “5 minutes to low gate”.

Charlie Duke (CAPCOM)

That's affirmative. That completes that card. The rest of the updates are just really for your information based on our 58 hour platform—look at the platform. We are really good shape. Your GYRO's have almost no drift in them since—plotted update we were looking at X of a minus 2.24 … Y of point plus 0.87, Z of minus 0.11. Since the update, which was based on the 52 hour P52, I believe, we gave you an X drift of plus 0.79, yaw of plus 1.06, Z of plus 0.02 … I can see the difference between the 52 hour and the 57 hour alignments were—did not really give us enough time to get a real good or completely valid update on the drift check. So we're real satisfied with the way the GYRO's are looking. The PIPA's are looking great also. We are in real good shape with those, too. Over.

Neil Armstrong (CDR)

This is Apollo 11. Radio check.

Charlie Duke (CAPCOM)

Roger. Reading you five by. How me? Over.

Neil Armstrong (CDR)

Okay. Loud and clear. You cut out when you were talking about the platform—something about 52 hours and after that, we never heard you again.

Charlie Duke (CAPCOM)

Roger. Guess we were changing antennas. Stand by. That's affirmative, 11. We were swapping antennas on you down here. Basically the word is that we have a real good platform, very small drift on the GYRO's, and very small drift in the PIPA's. Over.

Neil Armstrong (CDR)

Roger. Thank you. And I would like to have a few words of clarification if you will give them to me on the RCS … what that change of pitch may mean.

Charlie Duke (CAPCOM)

Copy. A few words of clarification on the RCS? Oh. Roger. The update there, Neil, you are speaking of about the one axis down to 5 minutes of low gate?

Neil Armstrong (CDR)

Yes. That's right. I'm not quite sure what that … means beyond 5 minutes.

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Spoken on July 19, 1969, 1:05 a.m. UTC (51 years, 7 months ago). Link to this transcript range is: Tweet

Charlie Duke (CAPCOM)

Stand by. I'll make sure I got my story straight with Control. Stand by.

Charlie Duke (CAPCOM)

11, Houston. On the RCS, what we are saying is that if we lose control about one axis prior to low gate, we would recommend an abort. This would require a—a loss of—of two distinct jets which is not very probable, but that is what we are recommending. After low gate we would continue on. We would recommend that we continue on to attempt a landing. Over.

Michael Collins (CMP)

Charlie, did you say you had some updates for me from the lunar surface book?