Jack Swigert (CMP)

They were two brand new fresh ones.

Jack Lousma (CAPCOM)

Aquarius, Houston. In regards to the CO2 canisters, by the way the PCO2 is reading 1.6 down here now. We expect that we can get 6 more hours out of the two canisters that we have there—6 hours at least. However, at 112 hours, when we've got several people up, we're going to rig up two more and we have the new simplified procedure for doing this. However, in the meantime, should we need to have a canister change, we plan to switch to the LM primary canister. Over.

Jack Swigert (CMP)

Okay. Copy that, Jack.

Jack Lousma (CAPCOM)

And, Aquarius, how's your PTC holding up?

Jack Swigert (CMP)

Well, we got a little bit off Jack. The—It starts high in the LMP's window and goes low in the CDR window.

Jack Swigert (CMP)

So we've got a little bit of a wobble on it. Of course, the command module venting doesn't help, either.

Jack Swigert (CMP)

Jack, in reference to your question about the PTC, on this last complete revolution, the Sun first appeared in the very top right corner of the LMP window, passed over the CDR window, and was visible through the overhead window, and now the Moon is—came pretty well through the center of both windows this last time.

Jack Lousma (CAPCOM)

Okay. Thank you, Jack. Copying that.

Jack Lousma (CAPCOM)

Aquarius, Houston. We'd like to get a little better idea of how PTC is going. So, what we'd like for you to do is what we did last time. That is to give us a reading on the center of the Earth and the center of the Moon on the—LPD.

Jack Swigert (CMP)

On the LPD. Okay, It's shifted. Let's see, the Moon's gone by and the Earth didn't come into the LPD last time.

Jack Lousma (CAPCOM)

Okay. But when it goes by the plane of the LPD, tell us where it was. Okay?

Jack Swigert (CMP)

Okay, Jack. This pass, the Earth came into view at the top left-hand corner of the LMP's window and was going down. However, when it passed it wasn't as high up as the last pass. It did pass into view at the CDR window, but too high up to get an LPD reading.

Jack Lousma (CAPCOM)

Roger. Understand it went high in both windows then.

Jack Swigert (CMP)

Yes, last time it wasn't even visible in the CDR's window; this time it was visible if you squatted down, but too high up to get an LPD reading.

Jack Lousma (CAPCOM)

Okay, Jack. That's good. Thank you.

Jack Swigert (CMP)

Okay, Houston; Aquarius.

Jack Swigert (CMP)

Okay. The moon came into view at the middle of the LMP's window, passed through the CDR's window at an LPD of 5 degrees.

Jack Swigert (CMP)

Okay, Jack. On this pass, the Earth came into the view at the top part of the LMP's window, and we got an LPD angle on it as it passed through the CDR's window of a minus 4 degrees.

Jack Lousma (CAPCOM)

Okay. A minus 4. Thank you, Jack —

Jack Swigert (CMP)

It's—it's above the—Okay. Are you familiar with the minus 4 being halfway through the sky part, huh?

Jack Swigert (CMP)

Okay, Houston; Aquarius.

Jack Swigert (CMP)

Okay. On this pass, the Moon came into view at the top part of the LMP's window, came across higher. Jim estimates the LPD angle at a minus 15 degrees.

Jack Lousma (CAPCOM)

Okay. A minus 15 on the moon, and sounds like it's set up pretty well.

Jack Swigert (CMP)

Everybody's happy with it down there?

Jack Lousma (CAPCOM)

Aquarius, it's a little too early to tell exactly how the PTC is going. We'd like to get a few more points, so keep reading them off, and we're still looking for that SUPERCRIT to go anytime.

Unidentified crew member

Okay.

Jim Lovell (CDR)

The Earth was just fairly high in the LMP's window and across the 14-degree LPD line.

Jack Lousma (CAPCOM)

Okay, Skipper; 14 degrees. Thank you.

Jim Lovell (CDR)

The Moon went by the LPD at 6 degrees, plus 6 degrees.

Jack Lousma (CAPCOM)

Okay. Earth at plus 6. Thank you.

Jim Lovell (CDR)

That's the Moon, the Moon.

Jack Lousma (CAPCOM)

Okay. The Moon. Thank you.

Jim Lovell (CDR)

The Moon passed by at a minus 8 degrees on the LPD. No, that's the Earth. The Earth passed by at a minus 8 degrees.

Jack Lousma (CAPCOM)

Okay. The Moon went by at a minus 8 degrees.

Jack Lousma (CAPCOM)

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

Jack Lousma (CAPCOM)

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.

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Spoken on April 16, 1970, 7:12 a.m. UTC (51 years, 7 months ago). Link to this transcript range is: Tweet

Jim Lovell (CDR)

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.

Jim Lovell (CDR)

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

Jack Lousma (CAPCOM)

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.

Jim Lovell (CDR)

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.

Jack Lousma (CAPCOM)

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

Jim Lovell (CDR)

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

Jim Lovell (CDR)

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

Jim Lovell (CDR)

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

Jack Lousma (CAPCOM)

Well, you keep waking me up.

Jack Lousma (CAPCOM)

Aquarius, Houston. You notice anything?

Jim Lovell (CDR)

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

Jack Lousma (CAPCOM)

Can you hear or feel anything?

Jim Lovell (CDR)

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

Jack Lousma (CAPCOM)

Okay. She's going down through 600 now.

Jim Lovell (CDR)

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

Jim Lovell (CDR)

Houston, Aquarius. What are your plans?

Jack Lousma (CAPCOM)

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

Jim Lovell (CDR)

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.

Jack Lousma (CAPCOM)

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

Jim Lovell (CDR)

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

Jack Lousma (CAPCOM)

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

Jack Lousma (CAPCOM)

— that it reversed your yaw. Is that affirmative?

Jim Lovell (CDR)

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

Jim Lovell (CDR)

But more than anything, it reversed my yaw.

Jack Lousma (CAPCOM)

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

Jim Lovell (CDR)

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.

Jim Lovell (CDR)

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

Jack Lousma (CAPCOM)

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

Jim Lovell (CDR)

Is that what they call a nonpropulsive vent?

Jack Lousma (CAPCOM)

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

Jack Lousma (CAPCOM)

It's going through 50 pounds now. So, are you seeing fewer sparklies?

Jim Lovell (CDR)

Yes. Much fewer. Not any at all, now. I'm not sure whether that vent gave me reverse yaw and roll—left roll—that's—if that's what it gave me.

Jack Lousma (CAPCOM)

You say you think it might have given you some left roll as opposed to opposite yaw.

Jim Lovell (CDR)

I'm sure it gave me the yaw, Jack, but I'm not too sure …

Jack Lousma (CAPCOM)

Okay. We'd kind of like to watch it, see what happens for a little while before we make a recommendation. However, we'll need some inputs from you on that.

Jim Lovell (CDR)

Well, we're in no trouble up here as far as—as far as the yaw goes. Everything's fine. It's faster than we had set up before. We just wanted to get into proper thermal constraint, and it's going to take me 15 minutes to get the thrusters up anyway.

Jack Lousma (CAPCOM)

Okay, Skipper. We don't see any thermal problems as a result of this change. If we see some communications problems, we may have to do something different, but so far, so good. And we'd kind of like to hear from you on LPD numbers, if you get anything going by the window.

Jack Swigert (CMP)

Okay, Jack. The Earth just went through at an LPD of 26 degrees.

Jack Lousma (CAPCOM)

Okay. The Earth went through at 26 degrees going the opposite direction this time—left to right. Is that right?

Jack Swigert (CMP)

From left to right. That's affirmative.

Jack Lousma (CAPCOM)

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.