Spacelog Apollo 13

Well, it was varying lengths. Is it suppose to be a long-time PROCEED?

We think it may be, Jack. We think it may be 15 to 20 seconds, and our recommendation is that you PRO and hold it down for a good period of time, probably half a minute or more, and see if the DSKY blanks.

Okay. All right, I didn't hold it in that long. Maybe 2 or 3 seconds is the longest I held it.

Okay.

Okay, Jack just came down the tunnel again and said the computer's okay.

Okay. Good to hear it. And did you ever get that BAT C MAIN A reading for us?

I guess in the heat of the battle, I forgot to to give it to you, I guess. Stand by.

Okay.

BAT C current was 2 amps and BAT A voltage, 30.2.

Copy, 2 amps, 30.2. And that sounds good to us, Jim.

Aquarius, Houston.

Go ahead.

Okay. We'd like to have Jack verify that the PYROs in LOGIC are SAFE, and we'd like to remind him to do no further powerup of the CSM until EI minus 2 plus 30.

Roger. He reports that the PYROs are SAFE, and we're standing by for 02:30.

Okay. Real good.

Well, I can't say that this week hasn't been filled with excitement.

Well, James, if you can't take any better care of a spacecraft than that, we might not give you another one. Hey, Jim; Houston. You might ask Jack, while he's down there, to take a peek through the telescope and tell us whether he can see any stars. Over.

Okay.

Joe, Jack tells me that there's still a lot of particles floating around and he's—he can't pick out any constellation that he recognizes so far. But it might clear here in a little while.

Aquarius, Houston. Over.

Go ahead.

Okay. EECOM is looking at that battery amperage that you gave us awhile ago. He'd like to see it about a half an amp to an amp lower. Like you to ask Jack to just check the circuit breakers and switches that he's pulled in so far and make sure he doesn't have any extra loads on MAIN A; specifically, the FLOODLIGHT configuration, and his CAUTION AND WARNING circuit breakers, and his ESSENTIAL INSTRUMENTATION POWER circuit breakers. Over.

Okay.

Okay. Jack reported that he turned out all the floodlights.

Okay. Okay, we copy that. Like to have him check the amperage on there; see what you have now, and give us a voltage reading, too.

Okay, will do.

Okay, Joe. This is Jack.

Go ahead.

Okay. I've been not reading any voltage at all on BAT C, and the amperage looks like about 2 amps, but that could be kind of noise-level stuff. I've got all the floodlights off and I—Can you think of anything—I could power down to lower MAIN A.

Okay. How about reading the voltage off of MAIN A?

Okay. Oh, this is Ken. Okay. Ken, it was 30.2.

Okay. We're checking out the floodlights we gave you. Actually, Jack, you ought to be able to go ahead and use the lights we gave you. There's no reason to sit in the dark. They're supposed to be coming off of MAIN B, and we're checking that now.

Okay. It's not bad down there. We're in—got plenty of light. But should I be reading the voltage on BAT C?

Jack, you should be reading BAT C voltage. That circuit breaker should be open.

Okay. Okay, can you think of anything else you want to get turned off to lighten load on MAIN A?

Okay. We're perusing that subject right now, Jack. It's really not that big a thing, just something we wanted to dress up.

Okay.

Okay, Aquarius; Houston.

Go ahead.

Say, Jim, as something to try, you might have Jack turn off the RING 1's AUTO coils, which are probably on MAIN A. Have him turn those off and take a look at the readings.

Okay.

Okay. Jack has turned off RING 1 that was on MAIN A, and he's still reading 30.2 volts.

Roger that, Jim. What's his amperage? Did he read that off?

I guess. He says it's down in the mud; it's less than 2 amps.

Down in the mud. Okay, understand that. Request he turn them back on and—Okay, Jim, that's the AUTO coils back on RING 1, MAIN A, and when you get that done, I'd like you to copy the entry pad.

Okay, Joe. Standing by to copy the entry pad.

Moon check on 30-degree window mark.

That's 36-degree window mark, Jim.

Three six. Roger.

Okay. Readback correct. And, Aquarius; Houston. If you want me to read you the landing area summary, I'll do that.

Sounds good.

Okay. In the mid-Pacific landing area, the weather is good. The cloud cover is 2000, scattered; visibility, 10; winds 060 at 10; wave heights are 4 feet, and the altimeter 2986, if you care. Scattered showers less than 10 percent of the area. Recovery forces are as follows: the Iwo Jima will be at the touchdown point, the aircraft call sign will be Recovery 1, on station with swimmers on board. The—we have the constant g backup reentry area covered with the USS Hall, the Good Liberty Ship, and the other recovery aircraft whose call signs you may hear are Samoa Rescue C-130s.

Okay, fine. We have the Iwo Jima as the prime recovery ship.

That's correct.

Joe, Jack tells me he is still having trouble looking through the optics. I'm just going to pitch up a little bit more here to see if he can get into the dark spot.

And are you tracking us, and do you have any results on that last midcourse?

Stand by. It looks good. I'll try and get you numbers.

It feels nice to use the hand controller again.

Go ahead, Aquarius.

I just said, Joe, it feels nice to use the hand controller again.

Oh. Roger that. FIDO says he's got you nailed within a half a foot per second; the midcourse looked real good.

Okay.

And I've got two things we'd like Jack to do in the command module to ease the load on MAIN A. One of them is to verify or turn the CM/RCS HEATER switch to OFF. We're done with that, and even though the circuit breakers are pulled, the switches might be drawing a little current. And the second one is, we'd like him to turn SCS LOGIC POWER 2/3 to OFF; we don't need it now. It's called up in the checklist at the appropriate time, and we'd like him to turn that off. Over.

Okay. I'll tell Jack to check that the CM/RCS HEATER switch is off, and, if not, we'll turn it off; and also to turn off the SCS LOGIC POWER 2/3 switch, OFF, since it comes up later in the checklist.

That's correct.

Houston, Aquarius. We're recording MAIN A voltage up to 31.0.

Houston, Aquarius.

Go, Aquarius.

Okay. How about if I hold a pitch attitude of about 115 instead of about 91. I think Jack can use the optics a little bit better at that angle.

Jim, that's perfectly okay with us, if it looks good for stars.

He just looked at them briefly; I'll go down and look at them a little bit better here.

Aquarius, Houston.

Go ahead.

Okay, Jim. We—We've been talking about your going to a different attitude than the pad attitude for better star field vision out the command module, and what we'd like to have you do is this. If you can predict now or sometime soon, what attitude it is that you would like to hold at that time, and go to that attitude now, we'd like to be able to compute the coarse aline gimbal angles for the CSM, and we can do that if you go to the selected attitude, hold it, call up a VERB 06 NOUN 20, and read us your LM gimbal angles, we can take those and compute CSM coarse aline gimbal angles on the assumption that, when we get back into the CSM coarse aline, you will return to that selected attitude. Does that sound okay? Over.

Yes. I'll try to hold the attitude we select directly, while you're giving us the coarse aline attitude. We're not too sure what—what's the best attitude. I'm going to ask Jack again if 115 is sufficient for him.

Okay. You can take some time figuring out the best attitude, and then you won't have to hold it all the way from now until then, if you just get back to it.

Houston, Jack would like to know what constellations are in his sextant, or scanning telescope, field of view at an attitude of about 105 pitch, zero roll, zero yaw. Can you give that to us?

Okay. We'll sure give it a go. As I said, we—We have some stars. They're not—They're not centered with the shaft and trunnion zero. Let us take a quick look at 105 pitch, shaft and trunnion zero, and see if we can get you an answer.

Aquarius, Houston.

Go ahead.

Roger. These—None of these stars will be exactly centered, but, at a pitch attitude of 115, we had computed that Vega, Altair, Rasalhague, and Deneb would all be in the telescope field of view, and the first three were also in view at the 91-degree pitch, so he should be able to see one or more of those four stars. Over.

Okay. Thank you, very much.

Okay. And, Jim, I can give shaft and trunnions if—if he's interested.

Okay. Why don't you give us the shaft and trunnion for—say, Altair at 115, and I'll go up there, and I'll see if he can pick it up.

Okay. Real fine, At 115 degrees of pitch, Altair, shaft 274, trunnion 22.2. Over.

Roger. Shaft is 274, trunnion 22.2.

That's affirm.

Aquarius, Houston.