Mike Collins (CAPCOM)

Apollo 8, Houston. If you'd go P00 and ACCEPT, we have our P27 ready. We'll send you up a REFSMMAT. Over.

Frank Borman (CDR)

Roger. P00 and ACCEPT.

Mike Collins (CAPCOM)

Apollo 8, Houston. Frank, we'd like to make sure you understand that when you do your P52, you want to select option 1, the preferred option, because those are the registers we're blinking now with this P27.

Frank Borman (CDR)

Roger. Option 1; thank you.

Mike Collins (CAPCOM)

Apollo 8, Houston. We got a good load in; it's your computer. Go to BLOCK.

Mike Collins (CAPCOM)

And you can go ahead with your P52 at your convenience.

Frank Borman (CDR)

We're going ahead right now.

Mike Collins (CAPCOM)

Apollo 8, Houston. Over.

Frank Borman (CDR)

Go ahead, Houston. Apollo 8.

Mike Collins (CAPCOM)

Roger. When Jim gets to the end of P52, he's got a flashing VERB 37. We'd like him to not proceed, to hold at that point; we'd like to read some bits and pieces out of the computer at that time. Over.

Mike Collins (CAPCOM)

Apollo 8, if Anders has got time to give us a countdown, could we get the BIOMED switch from center to left?

Mike Collins (CAPCOM)

Did you take that 1.7-second time delay into account?

Jim Lovell (CMP)

Okay. Houston, you have it.

Mike Collins (CAPCOM)

Thank you, Jim. And I'll give you at estimate here on how long we want to hold at this point; it won't be too much longer.

Jim Lovell (CMP)

Roger. It was my goof: I must have put in 3701 instead of 3723 and 501.

Mike Collins (CAPCOM)

Apollo 8, Houston. We have got a flight plan suggestion for you.

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Spoken on Dec. 25, 1968, 11:54 p.m. UTC (52 years, 5 months ago). Link to this transcript range is: Tweet

Mike Collins (CAPCOM)

Go ahead and delete the remainder of the P23's that you're working on now, go back to PTC attitude, and then pick up where it says 108 hours in the flight plan to pick up again there with your P23, or if you prefer to slip that time a couple of hours, if you want to get some rest in between.

Frank Borman (CDR)

I think that's a good idea; we'll do that.

Jim Lovell (CMP)

Mike, what does this do to our state vector?

Mike Collins (CAPCOM)

Not a thing. We've looked at your state vector, and it's good.

Jim Lovell (CMP)

So we didn't lose all the NAV we had just accomplished, right?

Mike Collins (CAPCOM)

Stand by one on that, Jim. I don't know; I'm checking.

Mike Collins (CAPCOM)

Roger. I say again, your state vector is just fine; it's still ticky-poo, and the reason we're holding here is that we're checking to see if any P23 information was lost. That's reason one, and the second reason is that your W-matrix shares some computer memory cells with P01, and we are getting a clarification on the status of your W-matrix before we proceed. Over.

Frank Borman (CDR)

We'll go ahead and start heading over to the PTC attitude.

Frank Borman (CDR)

Do you need that high gain any more, Mike?

Mike Collins (CAPCOM)

Negative. We don't need it any more.

Mike Collins (CAPCOM)

Roger, Frank. We're coming up on time for an oxygen purge on all three fuel cells. It might be a good time to do it while we are waiting here.

Frank Borman (CDR)

Alright. Mike, we are going to purge the three fuel cells, oxygen only.

Mike Collins (CAPCOM)

That's correct. Thank you.

Mike Collins (CAPCOM)

Apollo 8, Houston. That's enough on fuel cell number 1; if you'd start on two please.

Mike Collins (CAPCOM)

Apollo 8, Houston. We're in low bit rate now. Last time we saw you, you were still purging. Over.