Spacelog Apollo 13

Okay. After verifying the MAIN BUS voltage connecting the LM POWER to CSM I want to pull MAIN B BAT BUS B, or MAIN B to BAT BUS B, open.

That's correct. And then on panel 250, circuit breaker BAT B POWER ENTRY/POSTLANDING to open, and verify MAIN BUS B voltage.

Okay. Panel 250 BAT B POWER ENTRY/POSTLANDING, open, and then verify the MAIN BUS voltage.

Okay. That's correct. The last steps are to get the LM back on descent batteries. The first step is BATs 1, 2, 3, and 4, HI VOLTAGE, ON. Over.

Okay. Then the next step is a LM step, BATs 1, 2, 3, and 4, HI VOLTAGE, ON.

That's correct; and the last step in the LM, BATs 5 and 6 to OFF. Over.

Say again; you cut out there, Joe.

Okay, Jack. The last step in the LM, BATTERIES 5 and 6 to OFF. Over.

Okay. BATs 5 and 6 go OFF.

That's correct. That should configure you. Note that circuit-breaker protection on that circuit limits the available current to 15 amps. We think we can do quite a bit with it though. And the LM/CSM umbilical will be hot and MAIN BUS voltage may be monitored by selecting MAIN B on the gage. Over.

Okay. Real fine.

Good deal, Jack.

Okay. And I'll be ready to implement this whenever you call it up.

Roger that.

And how do you read, Joe?

Pretty good, Fred.

Okay. While Jack was on COMM, I was looking out the docking window here, and I could see another good shower of particles coming out of the service module. And the position this time appears to be on the other side. Before, we'd always seen them out of window 1, and where I'm looking at it from here, it looks like it'd be down below window 6 somewhere in the service module. Jack's going upstairs to see what it looks like up there.

Okay. Good deal. We copy that, Fred. And to show you how relaxed we are about the entry, Ken is looking at—giving you guys a chance to—prior to going into entry, PREP to snap a few pictures of the service module.

Ken is, huh? (Laughter)

Yes, he's got all that film up there, and he doesn't want to waste it.

Oh, I thought maybe you'd want me to do a PLSS EVA to go shoot pictures or something.

Okay, okay.

You're right; we got a lot of pictures.

I guess I agree it surely would be nice to document it someway if we can, but it doesn't look like …

Yes, we think it'd be a lot of help.

Joe, how do you read me?

Aquarius, Houston. Go ahead.

Okay. The condensate transfer worked great.

Stand by a minute, Fred. We're in a bad COMM mode.

Okay. How's that?

That's better.

Okay. The waste transfer into the condensate can works real well, Joe.

Okay. Good deal.

So, I guess we can keep FIDO happy with no overboard dumps.

Roger that.

Yes, that brings up one more possibility, Joe.

Say again, Fred.

Brings up another possibility. Now that we've got all of that stowed into the bags and the condensate can, we could probably blow all of that through the PLSS …, I wonder how the sublimator would work on waste water.

It might work if we had to do it, Fred. Right now we're looking at a comfortable excess of water through the sublimator. We were talking among ourselves this morning about having you try out the PLSS to ascent tank water-transfer situation and we decided not to do it, not to recommend it, because we figure it'd take us 30 hours to empty one of the ascent tanks, which you have to do in order to get PLSS water to it, and we'd rather use the descent water and we don't think we've gotten any sweat. Over.

Okay, Joe. I don't think there's any question about it from the plumbing standpoint that we could do that if we had to.

And, how do you read, Joe?

Read you pretty good, Fred. Go ahead.

I think our PTC wobble is growing worse. The Earth now is really up to the top of the window. I have to get way down almost to the floorboards to view it. Conversely, the Moon is way down at the bottom of the window.

Okay.

A lot more wobble.

Roger —

Far more wobble than I noticed on my previous watch.

Okay. Copied that, Fred. And our thermal people will be looking at it. One of the things we're talking about relative to the midcourse correction is we'd like not to do it before the SHe tank goes, if it's going to go, just so it won't give us a problem reestablishing PTC. And right now our people think that the burst disk will pop around 106 hours.

And Jack, Houston. For your information, FIDO tells me that we are in the Earth's sphere of influence and we're starting to accelerate.

I thought it was about time we crossed. Thank you.

Roger.

We're on our way back home.

There's something that puzzles me, Joe. Vance mentioned yesterday that the planned entry is a CMC-guided entry, so I'm kind of curious as how are we going to get the alinement.

Did you say how we're going to get guidance? Over.

No. How are we going to get a platform alinement?

Okay. We got a number of interesting ideas on that and the latest one I've heard is to power up the LM platform and aline it, and aline the CM platform to it.

Okay. That sounds good.

Okay. And we're working out detailed procedures on that, Jack.

Aquarius, Houston. Over.

Go ahead, Joe.

Okay. We are taking our final look at the mid-course procedures and we have a question as to the present position of one of the switches. The switch is the AGS STATUS switch on panel 6. We'd just like to know where it's at.

Okay. Stand by.

Okay, Joe. The AGS STATUS switch is OFF.

Houston, Aquarius.

Aquarius, Houston. Go ahead.

Okay, Vance. I just heard a little thump, sounded like down in the descent stage, and I saw a new shower of snow flakes come up that looked like they were emitted from down that way. We've already decided though—I wonder what the SUPERCRIT pressure looked like now.

Okay. Understand you saw a thump in the descent stage and a few snow flakes. We'll take a look down here, see if we see anything.

Aquarius, Houston.

Aquarius, Houston.

Go ahead.

Fred, we don't see anything wrong. For example, your SHe appears to be okay as far as we can see. The thing we don't have data on, is the … tank down there.

Okay. And I doubt if it would have been that anyway.

Okay. While we have you on the horn —

We're still getting -

Roger. Still getting it.

Go ahead.

While you're on the horn, be advised our calculations show you might be running out of potable water in the CSM pretty soon. Also, that you might start to have hydrogen tank venting in the CSM and a question. Next time Jack looks through the sextant and telescope, we'd like him to see how it looks. Do you have anything on the optics, any specks or anything?

Houston, Aquarius. How do you read?

Aquarius, we read you 4 by 4. Go ahead.