Spacelog Apollo 13

Okay, Jim. We got it. The Earth went by at a minus 8 degrees. On a basis of the data —

That's right.

On the basis of the data we have so far, your entry angle is 5.99. The block data we gave you on the pad for a no-COMM midcourse-7 last night is no longer valid because we made this midcourse.

Okay. Understand, the no-COMM pad is no longer valid because of the midcourse. Entry angle based on the last 2 hours' tracking is 5.99, and I take it you're going to keep tracking for some time now to see whether we need another midcourse or not.

That's affirmative.

Are you planning any no-COMM midcourse at 134 and change anyway right now, or are you going to wait?

We're discussing that now, Jim, and it looks like we're going to wait on the tracking. For the time being, since you're in the corridor, why, there's no need to pass it up. But we're going to keep looking at the tracking, and we'll probably come up with one.

All right. I'm not too sure what the venting is going to do to us so—when this SHe tank ruptures, what it's going to do for us.

Roger. We don't presently expect the SHe tank to have any effect on your trajectory, and the pressure's up to 1921 now.

Hey, it's going a lot better than we ever expected. What a way to get a data point.

And, Jack, just think. You thought you were going to sleep through all your watches.

Say again, Jim.

I said, you thought you were going to sleep through all you watches.

Well, you keep waking me up.

Aquarius, Houston. You notice anything?

Yes, Jack. I was just about ready to call you. Underneath quad 4, I noticed a lot of sparklies going out.

Can you hear or feel anything?

No, I sure can't, but I think it changed our—it changed our PTC. Let me check and see what the drift is.

Okay. She's going down through 600 now.

I think we're probably going to have to reestablish PTC. Yes, we got pretty fast yaw drifting, Jack.

Houston, Aquarius. What are your plans?

We're thinking about them right now. Did you say it yawed some?

Yes, I was in a right yaw and now I'm in a left yaw; at a much faster rate than the one we put in PTC.

Okay, Jim. We're talking it over. Stand by.

What's the SHe tank down to now, Jack?

Okay, Jim. It's going through 125 pounds now. And we understood you to say —

Okay.

— that it reversed your yaw. Is that affirmative?

Sure did, Jack. It reversed my yaw completely and put in a little pitch, I think.

But more than anything, it reversed my yaw.

Roger. Have you effectively established PTC in the opposite direction then?

Well, you could say that. I'm not too sure just what kind of pitch or roll I've got, coupled with the yaw. I just saw the Earth go by the LMP's window here, not too long ago at a rather faster rate than we had going the other direction.

Perhaps you can tell how fast I'm having to shift OMNIs.

Yes, we can tell the COMM cycling back and forth.

Is that what they call a nonpropulsive vent?

Right. I'd hate to see a propulsive one.

You and me both.

Of course, the only other thing that we'd be concerned about is what change in your velocity this might have had and what DELTA-V it imparted, and we'll have to look at that for a while before we are able to determine it. And, if there is no significant change, why, we prefer just to leave it the way it is.