Michael Collins (CMP)

Houston, Columbia. My rendezvous radar transponder is operating.

Ronald Evans (CAPCOM)

Spacecraft calling Houston? Say again.

Michael Collins (CMP)

This is Columbia saying the rendezvous radar transponder is operating.

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Spoken on July 21, 1969, 3:43 p.m. UTC (51 years, 3 months ago). Link to this transcript range is: Tweet

Ronald Evans (CAPCOM)

Tranquility, Houston. Request rendezvous radar breakers in about now.

Ronald Evans (CAPCOM)

Columbia, Houston. Request OMNI D—OMNI Delta.

Ronald Evans (CAPCOM)

Tranquility Base, Houston. Request you go ahead and start the warmup on the rendezvous radar.

Neil Armstrong (CDR)

Houston, you copying NOUN 93?

Ronald Evans (CAPCOM)

Tranquility, affirmative. Go.

Neil Armstrong (CDR)

Roger. We're going to a torque.

Ronald Evans (CAPCOM)

Tranquility Base, Houston. Columbia will be overhead at 122 plus 22 plus 51. His LOS will be 29 35. Over.

Neil Armstrong (CDR)

Houston, we'd like to check this on the tape meter against the AGS. We'll go back to altitude—altitude rates as soon as the rate starts to build up. Over.

Ronald Evans (CAPCOM)

Tranquility, Houston. Roger.

Neil Armstrong (CDR)

On second thought, since that will peg the range rate, I guess maybe we'd better not do that. And for this range that the AGS are showing now, 425 miles with a signal strength of 2.2. It looks like we ought to proceed on this. Over.

Ronald Evans (CAPCOM)

Roger. Stand by one. Tranquility, affirmative. Proceed.

Buzz Aldrin (LMP)

Are you getting the information on the downlink now?

Ronald Evans (CAPCOM)

Tranquility, affirmative, and we're saving it. We've got 4 so far, and it's looking good.

Neil Armstrong (CDR)

Okay. What do you people think about calling up a VERB 83?

Ronald Evans (CAPCOM)

Tranquility, Houston. Stand by on that now. We're getting the data now. We're checking on the VERB 83.

Buzz Aldrin (LMP)

And we expect that we may lose lock when it passes overhead because of the MAX rate that the radar has.

Ronald Evans (CAPCOM)

Tranquility, Houston. Negative on VERB 83.

Ronald Evans (CAPCOM)

Tranquility, Houston. Go.

Michael Collins (CMP)

They've just lost lock, Ron.

Ronald Evans (CAPCOM)

Roger. We had about 20 some points before you did that. And for your information, the reason the AGS is a little different there—The reason the AGS is a little different is because the K factor is a little bit wrong.

Buzz Aldrin (LMP)

Has he already gone? Over. Okay. Okay. Has he already gone overhead, or do you want us to try and get in lock on again?

Michael Collins (CMP)

Houston, Columbia. You got NOUN 49. Five good marks.

Ronald Evans (CAPCOM)

Tranquility, affirmative. Try to lock on again, and you'll lose him at about 29 minutes and 35 seconds.

Buzz Aldrin (LMP)

Okay. Do you have a real quick procedure how to do that?

Ronald Evans (CAPCOM)

Columbia, Houston. Say again about your NOUN 49.

Michael Collins (CMP)

I say I got five good marks. You got NOUN 49. When you get everything you need off the downlink, let me know.

Ronald Evans (CAPCOM)

Columbia, Houston. Stand by one.

Neil Armstrong (CDR)

Ron, did you say on the 526 alarm to proceed or do a VERB 32?

Ronald Evans (CAPCOM)

Roger. It's just that radar thinks the range is greater than 400 miles now.

Ronald Evans (CAPCOM)

Tranquility Base, Houston. Recommend you terminate P22. Over.

Ronald Evans (CAPCOM)

And, Columbia, Houston. Same for you. You can terminate P22.

Michael Collins (CMP)

I have. I'm running fast.

Michael Collins (CMP)

I'm staying in P22 here a second just to record the NOUN 89 and then over VERB 34.

Ronald Evans (CAPCOM)

Columbia, Houston. Roger. We copy, and that's good.

Ronald Evans (CAPCOM)

Roger. Request S BAND FUNCTION switch to RANGE. We're going to do some ranging on you. Also, I have an updated AGS K factor when you are ready to copy. Over.

Neil Armstrong (CDR)

Roger. Go ahead with the K factor.

Ronald Evans (CAPCOM)

Roger. 119 plus 59 plus 59.92. Over.