Vance Brand (CAPCOM)

Roger, You're coming in a little weak. Have a recommended roll rate for this PTC, if you could copy.

Vance Brand (CAPCOM)

Okay. Recommend that you put in R1 the following: 03750, and that should give you exactly a rate of 0.3 degrees per second. Over.

Jack Swigert (CMP)

Okay. Enter 03750. Is plus or minus our choice?

Vance Brand (CAPCOM)

Roger. The same direction you rolled the last time, which I believe is plus.

Jack Swigert (CMP)

Hey, Vance, would you monitor our rates and kind of give an idea of when you think they're stable enough to start PTC.

Vance Brand (CAPCOM)

Roger, Jack. We'll take a look and let you know as soon as they look stable enough.

Jack Swigert (CMP)

Okay. I've got quads A and B disabled here.

Jack Swigert (CMP)

Have they come up with an idea of how much fuel I used on the docking and also the P23 session at 5 hours or 6 hours.

Vance Brand (CAPCOM)

I think we can give you something. Stand by a minute.

Vance Brand (CAPCOM)

Okay. It's looking good so far as RCS consumables are concerned, Jack. You're standing about 20 pounds above the curve right now. Looking at the TD&E, you expended 65 pounds or—Stand by—55 pounds, correction on that.

Vance Brand (CAPCOM)

And 14 pounds on P23s. You used a little more out of quad A than out of the others.

Jack Swigert (CMP)

Hey, could you say again the TD&E fuel? We've got a different—we all heard different things.

Vance Brand (CAPCOM)

I said 65 and then corrected that to 55 pounds.

Vance Brand (CAPCOM)

Okay, Jim. Your rates look good. It's okay to start the roll again, if you'd like.

Fred Haise (LMP)

Hello, Houston; Apollo 13.

Fred Haise (LMP)

Okay. Ready for a little count here, Vance, and I'll shoot another picture. We found the Earth again.

Vance Brand (CAPCOM)

Okay. We'll be standing by, Fred.

Fred Haise (LMP)

Okay. Stand by for a mark on another picture.

Vance Brand (CAPCOM)

Okay. Standing by, Fred.

Vance Brand (CAPCOM)

Okay, we got it.

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Spoken on April 12, 1970, 3:44 a.m. UTC (51 years, 8 months ago). Link to this transcript range is: Tweet

Vance Brand (CAPCOM)

Jim, Houston here. Two items: first of all, your PTC is looking very good and it should carry you through the night; second point, have a procedure to give you, if you're ready to copy. We'd like to set three bits in the computer, and I'll explain why.

Fred Haise (LMP)

Go ahead, Vance, we're ready to copy.

Vance Brand (CAPCOM)

Okay. The procedure is as follows: VERB 25, NOUN 07, ENTER; 1331, ENTER; 7, ENTER; and ENTER. Explanation as follows. During the P23s, there was one time when VERB 37 was entered into the computer at about 16 seconds after the OPTICS ZERO switch was flicked to ZERO. This is a very uncommon anomaly in that, if you do this during—0.4-second interval at around 16 seconds after you zero the optics, some OPT-mode bits are reset; and this would mean that, if you had a OCDU fail, it wouldn't be indicated; so all this procedure is doing is setting these three bits back again where they should be.

Fred Haise (LMP)

Okay, Vance, and I guess I'll try to be slower on that VERB 37.

Vance Brand (CAPCOM)

Yes. Actually slower or faster, either one, I guess. Well, yes, slower. It's a very unusual thing to have that happen.