Spacelog Apollo 13

Roger, Jim. Ready to look at it with you.

Twelve clicks right.

Okay, Jack. Are we clear now to proceed with the powerdown?

That's affirmative, Fred. We're ready to press on with powerdown. I've got two changes for you. Step 1 of the emergency powerdown on page power—5. Over.

Go ahead.

Okay. Leave your POWER AMPLIFIER switch in PRIMARY vice OFF and put your RANGING switch to RANGE, vice OFF/RESET.

Okay. We're in PRIM in the POWER AMP and RANGING on RANGING.

Affirmative.

Okay. I'm going to pull. Well, here, let's just look at the checklist.

Okay. Configure CBs. There you go.

Aquarius, Houston, hold off 1 on powerdown, please.

Okay. We'll hold off. And we're looking at a SHe pressure, incidentally, of about 1830 now.

Roger. We concur with that. And it looks like you got a little pitch rate going on here. Do you copy the same?

Okay. My pitch needle is just slightly up now. I could try to take it out if you want me to.

Not—Wait, wait. There you go.

Just hold off on it 1, Jim. We'd like to take a look at it.

Okay.

Aquarius, we'll need high bit rate, please.

Flashlight, Jack. Jack, flashlight over here a minute.

Aquarius, we need the POWER AMPLIFIER back in high bit rate, please.

You got it.

You got a couple in the roll pretty soon.

What is it, 1.7?

You have another set of them by the PGNS.

Now we got to turn on the heaters you want to save -

What's that flitting out there in the breeze? Are we venting again? Take a look, Jack.

Well, once we get squared away, Joe, I think I am going to have to go to the space center and take a good healthy one and leave just about everything. I've held up long enough.

That's coming from above. Another one just—is just coming down right over here. Well, there's the old terminator at Fra Mauro. We'd been landing about 2 hours ago, huh? Right on the —

Houston, Aquarius.

— to the right of the terminator.

Go ahead, Aquarius.

Just for information, although I thought I'd never have to use it, that technique looked like it was a pretty good one.

Roger, Jim. And we'd like you to give us your idea of how the PTC looks. We're not sure we're seeing what we ought to here.

Okay. I still have my ball powered up and I'm coming around past 270 right now. I've got a slight roll and pitch offset in there. My pitch needle about halfway up and my roll needle is about 4 degrees over now.

Okay, Jim. With that info we'll go on the PTC, and let's proceed with the powerdown.

Okay. We'll proceed with the PTC and proceed with the powerdown. I guess if we have to we can reestablish PTC at a later date. Okay. Okay.

First row. Ullage. AGS.

Your AGS on?

My what? My what? Oh, yes. Go ahead.

Okay. The four INVERTERS of this AC BUS volt, Fred.

Okay. Go ahead.

Okay. Let's—give the last thing to Jack and I'll keep it all out. Okay? RCS SYSTEM A. That's in. TCAs are going off. Why do they need the ISOL valves in the ASCENT FEED in?

You're not sucking any power unless you take these switches and move them.

How come we pulled them out, then, in this burn?

Because you didn't want them to get moved inadvertently, I guess. It doesn't matter, Jim, they can be out or in in terms of powerdown. They just don't count.

Okay. I got 1, 2, 3.

ISOL valve should be in 2.

Yes. Okay. Third row. Attitude DIRECT CONTROL I still have in.

Jack, how do you read now in baseband?

Aquarius, Houston. You're cleared to open the POWER AMPLIFIER circuit breaker and go to LOW BIT RATE, leaving the POWER AMP switch in PRIMARY.

Houston, Aquarius.

Go ahead, Aquarius.

About how far out are we now, Jack?

Okay, Aquarius. You're 150 000 miles and you're coming in at 4500 feet a second. That's from the Earth.

Okay. We're at 100—Yes. 150 K, 4500 feet a second.

And, Aquarius, how much TTCA control did you have to do in the burn?

How much—What was that, Jack?

How much control of the TTCA did you have to do during the burn?

I wasn't noticing Jim too much. I'd say I put in maybe about six or seven inputs. I don't think it ever got off more than a couple of needle widths.

Roger, Fred. Thank you.

I think it's probably the same for Jim. I wasn't noticing his input but the—his needle was hanging in there pretty good.

Aquarius, Houston. How do you read?

I read you loud and clear, Jack.

Okay, Jack. What's your status, who's sleeping, and who's working?

Well, right now we're all three kind of working. Do you have any recommendations?

Yes, looks like to us from here that you and Fred ought to get some sleep, and that you ought to eat in about 6 hours. And that the Skipper ought to go to bed about 113 hours.

Okay.

I've got some other information. We shouldn't have some good dope on your trajectory for about 2 hours. Looked like to us that the burn was real good, however, and we're taking a close look at it, and we'll get back with you on that in about 2 hours from now. Another thing that we're expecting to have happen is that the SHe tank is going to reach its burst limit. The earliest time we predict this will happen will be at 107 hours on about 25 minutes. And the latest probable time is at 110 hours, and this is supposed to be a nonpropulsive vent, but you might hear it and you might see something.

Okay. That's good news. We were wondering about that. And I'll relay all the other information you gave me.

Okay. And if the SHe tank does burst during this time frame before we get trajectory info, why, that will delay our trajectory info somewhat. Your consumables, your water is now good through 152 hours.

Jack, wait a minute. Let me copy some of this down.

Okay.

Okay. I'm ready now.

Okay. We're predicting that you still have more water than you need. And one thing we'd like for you to do is when you're going to sleep up there in the command module take a look through the optics and see if you can see any stars.

Okay, Jack, I will do. Jim and I were able to spot constellations from the windows of the LM when there's no venting taking place. Could you give me some time on these consumables, what you're predicting they're good for? I think you started to give them times, didn't you, or was I just hearing things.

We started to give you some times. We think we might be able to give you some better ones pretty soon. But it looks like your water is good through 154 hours, and you've got takusan O₂ through 272 hours, plenty of lithium hydroxide, and your amp-hours ought to be good through 199 or 200 hours. Over.

Okay; good. Copy that.

We expect that your water rate is going to drop off and at the time, DELTA will go up to 160—165 hours quite shortly. Another thing we're interested in is what's your status on rest and medication.

Okay. None of us, I know of, had any medications, and right now as far as rest, I suppose we're no tireder than normally in this situation. I'm going to relay the work-sleep cycle.

Okay. And don't forget to look through the optics when you go up in the command module.

(Laughter) Okay. I'll do that.

Jack, as luck would have it, we just now started to vent a little from the command module …

Aquarius, Houston. Sorry about that but there's too much background noise to read you. I think we'll have to wait until you come up on a new antenna. Over.

Okay, Aquarius. Go ahead now. I think I can hear you.

Okay. Okay, Jack. I was going to say, as luck would have it, the command module picked this time to start venting again, so I probably won't be able to get a good hack out of stars out of the telescope.

Okay. Thank you. And if you can think of it, when the time comes up, when you're not venting how about remembering to take a look through them and give us a word?

Houston, Aquarius.

Go ahead. Over.

Aquarius, Houston. Did you call?

Yes, Jack. I just got a question. How long are you predicting our command module canisters to last in here?

Okay, Jack. We've got 14 cartridges that'll last 157 hours, plus we've got the LM primary cartridge with 23 hours, and we've got two PLSS cartridges with 7 hours apiece.

Okay. I was just curious as to how much time we've got out of these two cartridges.

Stand by 1. I'll get a prediction on that. By the way, I hope you're keeping track of the ones you've used and the ones you've not.

Yes, right now, we have numbers 7 and 8 in the LM here.