Jim Lovell (CDR)

Okay, Houston. We're starting PTC. We're disabling quads A and B now.

Vance Brand (CAPCOM)

Roger, Apollo 13. Houston copies.

Vance Brand (CAPCOM)

Apollo 13, Houston. Over.

Vance Brand (CAPCOM)

Jim, we'd like to verify that the high gain is secured, that the S-BAND antenna is on OMNI, and OMNI B should be the right antenna. Over.

Jim Lovell (CDR)

Okay. You want the high gain secured and you want the OMNI on OMNI Charlie, huh? Or Baker?

Vance Brand (CAPCOM)

That's affirm. And this'll be maintained in the PTC.

Vance Brand (CAPCOM)

And the high gain angles for stowage—or for stowing—are pitch minus 52, yaw 270.

Jim Lovell (CDR)

Stand by for another Earth weather picture. I'll give you a mark.

Vance Brand (CAPCOM)

Houston here. Your rates look very stable. It looks like your rates are damped out completely here. As far as we can see, it would be alright to start the PTC.

Jim Lovell (CDR)

Okay. We'll give it a try.

Fred Haise (LMP)

Hello, Houston. This is 13. How do you read?

Vance Brand (CAPCOM)

Hello, 13; Houston. Loud and clear. 13, Houston is reading loud and clear. How do you read?

Fred Haise (LMP)

Okay. And do you have any estimate, Vance, on how long we'll be charging battery B?

Vance Brand (CAPCOM)

We'll be charging for 4-1/2 to 5 hours yet, Jim.

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Spoken on April 12, 1970, 3:08 a.m. UTC (54 years, 8 months ago). Link to this transcript range is: Tweet

Vance Brand (CAPCOM)

Fred, recommend that, when your window comes around facing the Earth again, that you catch another one of those pictures, and at the same time, you should probably start PTC again. We might have sent a confusing bit of info up to you. The “disable two quads” only applies to an early step in the procedure. We didn't mean that for the latter part of the procedure where we have the statement “enable all jets.” Over.

Vance Brand (CAPCOM)

Apollo 13, Houston. Go ahead.

Jack Swigert (CMP)

Vance, Fred said that you had some more information about PTC and a different way of establishing it or something, huh?

Vance Brand (CAPCOM)

Roger. Referring to the procedure on G/8-2, if you have that open, I'll tell you what we had to give you.

Jack Swigert (CMP)

Okay. Stand by and I'll get it out.

Vance Brand (CAPCOM)

Okay. On checklist G/8-2 under step 5, there's a statement, “disable all jets on two adjacent quads,” and that's what we were referring to when we called up saying “disable quads A and B.” So that's all fine; however, going down now to step 7 where it says “enable all jets,” we hoped that you didn't think we meant leave A and B disabled there. In that case, it's as written. All jets should be enabled. Over.

Jack Swigert (CMP)

Okay. Our checklist has “all jets” scratched out, and it says “enable couples on all axes.” So what we'll do is—we'll reestablish this thing and come down to that step 7, and we'll enable all jets. That means enable quads A and B. Is that right?

Vance Brand (CAPCOM)

That's affirm. You'll have A, B, C, and D enabled for step 7.

Jack Swigert (CMP)

Okay, real fine. I'll start on it now.

Vance Brand (CAPCOM)

Okay. Understand you're going to reestablish it.

Fred Haise (LMP)

And Vance, on that picture, I was all set to shoot it just a little before you called, and the Earth hasn't showed up in the window yet. I don't know if we got too far off the bellyband or what.

Vance Brand (CAPCOM)

Roger. On the photo, you'll probably have to reestablish the attitude for PTC and then whenever it comes into the window again, why we'll just be standing by for the photo.