Spacelog Apollo 13

And we need the SUIT CIRCUIT RELIEF valve back to AUTO. Correction, back to CLOSE.

Hey, Jack, that's in work. And one thing, comparing Jim's checklist with my own, I find one difference there at EI minus 02:30. His checklist has me changing a—opening a EPS SENSOR SIGNAL circuit breaker right prior to turning off LM power. Is—I'd like to find out which checklist is correct.

Hey, Jack. The LM checklist is just for information to Jim. It's just to tell him that—that you're changing back to command module power. Your checklist is correct. Over.

Aquarius, all of your pads will be coming up in about 3-1/2 hours, at EI minus 06:30. And one thing we want to remind you of, when you remove power from the command module LM umbilical, is to be sure that you open the LM POWER MAIN B circuit breakers, both of them, before you start throwing switches and circuit breakers in the LM. Do it as we've outlined it in the procedure, in that order. Over.

Okay. That's the way we planned on it. We'll let Jack do his three and then he'll tell us when we're GO from there. What pages are those changes on?

Okay, Fred. The one I've got for you is at the end of power removal from the command module LM umbilical. And just for your information, after you go through that entire procedure and about the time you're ready to transfer to the command module, at that time, power will be removed from the umbilical, and it's okay to disconnect it. That is, after you've thrown the switches in the LM. Is that clear?

Roger. That's where I've got a remark here to check with you to see if it's all right to proceed.

Roger. And that would be just after, on panel 16, you opening ASCENT ECA CONTROL breakers.

Which step number is that?

The confusing thing is, Jack, where they told me to wait for MSFN GO before proceeding was that BAT 2 LOW VOLTS OFF/RESET, then ON.

Okay. That's still affirmative. We'll give you a go after waiting 5 seconds, and then down from there just a few steps, after you have opened the ASCENT ECA CONTROL breakers on panel 16, at that point, the umbilical is not powered, and it's okay to disconnect them should you care to do so.

Okay. After the last step then, I'm free to disconnect.

Right. And one other change we have is, shortly after that, where we're configuring for jettison, we have closed both the FORWARD DUMP valve and the OVERHEAD DUMP valve. And we don't want to get in a locked up position like that, so one way to get around it is to—After we close the FORWARD DUMP valve, turn the DESCENT OXYGEN valve off. Over.

Okay. After the FORWARD DUMP valve, add a step in that says the DESCENT OX valve, off.

Okay, Fred. That concludes the DELTAs. And perhaps you heard that our GAMMAs are still minus 6.03 and our DELTA-V will be a 2.8-foot-per-second RCS burn.

Roger.

Fred-o, we've got one more change we'd like to give you to clarify a question that Jack asked earlier. At EI minus 02:30 —

Okay. Hold on a minute, Jack. I meant to call Jack back down. I'm not familiar with the previous discussion.

Negative. This is on your checklist.

Okay. Go ahead.

At E mi—EI minus 02:30, during power removal from the umbilical, first thing we do is two steps with the CSM. We open the MAIN B, the LM POWER to MAIN B circuit breakers, and then there's a third step which says “Circuit breaker EPS SENSOR SIGNAL, MAIN B, open.” Just delete that step. Over.

Okay. Delete the third step.

And, Aquarius, for your information, as far as our water supply is concerned, including our plans for powerup, we have an additional 18 hours of water remaining from this point.

Okay. Eighteen hours of water remaining from this point, Jack.

Hello, Houston; Aquarius.

Hello, Aquarius. Go ahead.

Okay, Jack. This is Jim. I just want to make sure that you're filtering the changes to the checklist that come up to make sure that they're absolutely essential. When we learn our procedures, we can only do it one time, and we can't make changes at the last minute. We'd like to do the best, the safest way possible, but unless the changes are really essential, don't bother sending them up.

Roger. We won't. The chairman of the CPCB is still active, and one thing we're trying to do is to save you all the time we can between EI minus 02:30 and 1 hour.

That's affirm. That's a real important time.

Yes. For your information, Jim, I don't know whether you heard that originally, but that time from 2-1/2 to 1 in there has been run about three times, and it's pretty tight, so we've tried to weed out what we could, which isn't much, but I think the other message you might impress on Jack when you get around to alining that platform, don't try to get it down too neat. It doesn't have to be all that good. Just do a nice quick and dirty one, and that's going to be good enough anyway.

I concur. I think for reentry we don't have to have a real accurate platform, but I haven't told Jack that.

Roger. Hey, Jim, while you're up and things are nice and quiet, let me give you a couple of other things to think about. One specifically. I know none of you are sleeping worth a damn because it's so cold, and you might want to dig out the medical kit there around 01:35 or in that ballpark, and pull out a couple of Dexedrines apiece and try one about then, and another around 01:39 to 01:40.

Well, I hadn't brought that up. We might—We might consider it.

Okay.

Wish we could figure a way to get a hot cup of coffee up to you. It'd probably taste pretty good about now, wouldn't it?

Yes, it sure would. You don't realize how cold this thing becomes when it's in a PTC mode that's slowing down, and I just clocked the cycles on my … And it's about 11 to 12 minutes now, and the Sun is directly overhead, so it's shining on the engine bell of the service module and not getting down to the spacecraft at all.

Hang in there. It won't be long now.

Aquarius, Houston.

Go ahead, Houston.

Okay, Skipper. We figured out a way for you to keep warm. We decided to start powering you up now, and what we want you to do—what we want you to do is take your entry LM PREP checklist and start at the top where it says “BAT 5 NORMAL FEED on,” and then jump over as it says to your 30-minute activation, and do all of the 30-minute activation up to, but not including, the burn. You copy?

Okay. If I understand you correctly, then that gives me leeway to maneuver when we get up to activation complete, and we can be in position for the burn, but we will not burn. We don't have a pad anyway.

That's affirm, Jim. You could maneuver to burn attitude, or you could maneuver to an attitude which should put the Sun in the windows to warm the place up.

Sounds good, and you're sure we have plenty of electrical power to do this?

That's affirmative. We've got plenty of power to do it. I can get you a number, though.

Jim, you've got about 100-percent margins on everything from here on in.

That sounds encouraging.

Roger. That's in the LM. We're not talking about the CSM right now.

Houston, Aquarius.

Go ahead, Aquarius.

Okay. Question. This short turnon step 3 on page 24 has us only turning on the RCS SYSTEM A/B, two quads, and the breakers are still out on panel 11. Did you want those in, too, or are we just going to use one set of heaters?

Stand by.

Aquarius, Houston. Go as the checklist recommends for now. When you get into the circuit breaker panel configuration, you're going to get the number 1 set of heaters on anyway.

Okay, Houston. We'd like to get a hack to set our mission timer here, Jack.

Okay, Fred-o. Set it at 133:35 straight up. You've got about 30 seconds to set it.

Okay. Standing by.

Okay. I'll give you the 2-second delay in there. Stand by to start.

START.

Okay. We've got it.

Okay. I'm counting 133:35:10.

Right on.

Aquarius, Houston. One other way to warm things up in a hurry in there is when you get your AC on to turn on the window heaters.

Okay. I guess the only question I have is what it's liable to do to us with the—looks like almost a frost on it now.

Understand this, Jack. I'd like to let it maybe warm up just a little bit more before hitting it with the heat load.

Not a bad idea.

And, as you can see, Houston, at turnon we got our old friend downlink 2 back.

Aquarius, Houston. It looks like you're proceeding toward the gimbal lock there. We'd like you to check that, please.

Roger. Not much we can do about it. We can't use the thrusters, Houston.

And, Houston, Aquarius. I guess the next thing for the PGNS will be a coarse aline 000, but I guess we ought to hold up now until we get enough time on the RCS thrusters.

Aquarius, Houston.

Go ahead.

Roger. Did you get my GO for RCS?

That's affirm. We're GO. What we're doing now, Jack, is letting the spacecraft drift in this mode to pick up the Earth again.

Okay.

It's going to be interesting today, Jack. The Earth's a lot bigger; the crescent is a lot more pronounced than it was yesterday.

Well, you're going in the right direction.

That's right.

And, Jack, I guess we haven't changed our angle much with respect to the Sun 93 million miles away, so it ought to be in about the same place in the AOT, isn't that Charlie?

Hold 1 on that, Fred. I'll get an answer for you.

Okay.

Aquarius, your ASA is warmed up now. You can activate the AGS.

Aquarius, Houston. When you look out a detent 2 in the proper burn attitude, what you ought to see is the Sun at 12 o'clock, about halfway between the top of the AOT and the center of the pipper. And you ought to see the Earth —

Okay.

— at 6 o'clock.

Okay.

And, it's getting a little warmer in here now. Thank you.

Duck blinds are always warmer, Jim, when the birds are flying.

Right.

Jack, I've gotten so used to flying attitude with the TTCA, I won't be able to do it normally.

Say again, Jim.

Aquarius, we see your glycol temperature getting up there. If you want to make it a little warmer, or you can try putting your SUIT TEMP valve to HIGH, if you haven't already got it there.

Aquarius, something we're thinking about right now is, if we can do it without using a lot of RCS, it would be to our advantage timewise to try to get an alinement.

Okay. You mean a P52?

We're —

I'll … around.

A combination of 51 and 52.

I'll see what we can do, Jack.

Aquarius, Houston. On panel 16, we'd like for you to close the CROSS TIE BAL LOADS breaker, please.

Okay. It's closed.

And it looks like we could support a—an alinement in a few minutes, if you'd be willing to go ahead with that.

Jack, it sounds good. I think from our position here, we know where the Sun and Moon are and it's strictly going to be a pitch maneuver. But I think we can save some gas. I'll see what we can do.

Houston, Aquarius.

Go ahead, Aquarius.

We're all set to go. Are you going to ship us up a REFSMMAT?

Yes, we are. Stand by 1.

Okay.

The Sun feels wonderful. It's shining in the rendezvous window.

And, Aquarius, before we can ship you a load, we'll have to have, on panel 11, under COMM, the UPDATA LINK circuit breaker closed.

It's closed.

Roger. It'll be a few —

… closed … -

Okay. And it'll be a few minutes yet, Jim. We're still cranking it up.

Okay. Stay with it, Jack, and I'll go back to data.

Roger.

I got BAT in about 33-1/3 percent on that uplink. Too fast alarm.

Say again on that, Fred.

I just got another uplink too fast when I took the DATA switch back off—It's happening, I guess, about a third of the time.

Aquarius, Houston. We're ready with your load if you'll give us DATA please.

Aquarius, Houston. After the uplink, you'll have to set the drift and the REFSMMAT flag as on page 8 of the contingency book, steps 5 and 6.

Okay. Are you done with the computer now, Jack?

Negative. We'll give you the word.

Roger. Aquarius, we're through with it, it's your computer.

And, Aquarius, Houston; take option 1 on a P52 when you get to it. And I've got some ball angles for a Sun and Moon.

And have you got some plan in vectors for us, Jack?

Okay, Fred-o. For the Sun, I've got 246; for the Moon I've got 250.

Are you talking about ball theta angles?

Negative. I was—I was reporting the code for NOUN 70.

They're in the computer, Fred.

Okay, Houston. We have the Sun marks and I'll start up at pitch now to go over and pick up the Moon.

Houston, Aquarius.

Go ahead.

Just as a note of interest in this dock configurations for P52s, the command module docking probe is right down the middle of—the docking light, rather, is right down the middle of the detent. And when the Sun flashes on, it really makes it difficult.

Just like the simulator.

Yes. It was good training.

Well, Jack, that's what it says the torquing angles are.

We haven't got them yet.

Aquarius, hold on to torquing angles, please.

We're doing that.

Jim, the reason for the delay is that we're not seeing the data yet. We're having to check a point here; and as soon as they come up, we'll let you know what to do with them.

Okay. We had a large NOUN 105 of—what—112, and our torquing angles, Jack, are minus 01713, minus 03278, minus 01395.

Roger. Minus 01713, and we see them now.

Aquarius, torque them.

Okay.

At 35:04:25.

Aquarius, do you have a star close by there you could check?

I'll look around, Jack. I was just trying to get a check on the Moon, again, to see if those angles were indeed true, and we got the Moon back again and centered.

Okay, Jack. What you're reading now the angles? We had the Moon centered, and it's pretty close to what we have on the 8 ball, I guess. Close enough for any entry that we'd like to do.

Roger. And I'm told that Denubla—Denebola and Regulus are nearby if you wanted to make a star check.

Okay. I'm going to start pitching around again, and I'll see if I can pick them up. I have Orion out here to my left a little bit, but it's pretty close to the—oh, here. I've got Sirius. That's a nice one. How about that?

Aquarius, is Jack sitting on the rumble seat there?

He was. He just headed upstairs to take another look around.

Okay. I got a minor addition to the entry checklist for him. This time it's in the —

Okay. Stand —

— entry book.

Okay. Stand by 1. He has that in his pocket.

What I'm doing, Jack, is just—I'm pitching over now. I'm going to pick up another star. Sirius was just too far off. I thought I was going to use too much gas getting there.

Roger.

By the time I get alined in the—in the AOT—be nice if we didn't have Odyssey attached, we could just AUTO—AUTO maneuver over to these things.

Looks to us like you've got her alined, Jim, so I wouldn't worry about it too much.

Yes. I'm pretty confident that the platform's fairly decent.

Aquarius, Houston. We need an E MOD VERB 74, when you've got a chance, please.

Okay, Jack. On your entry checklist, on page 2-5. Down there on step 9, where it says 152 degrees pitch at .05g, adjacent to that, so that Recovery can see you better on the way down, we want you to turn your S-BAND, POWER AMPLIFIER to HIGH. Over.

Okay. Turn S-BAND, POWER AMP to HIGH at .05g time.

That's affirmative.

Okay. Is that it?