Spacelog Apollo 13

Okay. Joe. As I read that, at 74 hours we're going to do an AOT Sun check at detent 2, which is going to require the rendezvous radar out of the way. And we use P52 AUTO maneuver to get there, or at least the angles out of that, and if this passes within 1 degree, you're saying the platform is okay for the maneuver, and we won't need a subsequent P52. But even if it is okay, you'll give us a star which we can use for our check when we're in darkness. If this check flunks, you'll pass us on up then an Earth/Moon aline procedure.

Okay, Fred. That's correct, except the aline procedure that we're working on is an Earth/Sun aline, and other than that, that's correct. Incidentally, this TC plus 2 maneuver looks like it will still be around a 900-foot-per-second maneuver and that it will get you back to the mid-Pacific line at 142 hours.

Okay. That was an Earth/Sun check, John. We're getting a little close to the Moon now. And the TC plus 2 maneuver still looks about 900 foot per second to get us at mid-PAC, at about 142 hours.

Aquarius, Houston.

Go ahead, Joe.

Okay, Fred. We got a good batch of ranging and now we'd like you to reverse the configuration, RANGING to OFF, VOICE FUNCTION to DOWN VOICE BACKUP, POWER AMPLIFIER circuit breaker out; we'll be talking to you.

DOWN VOICE BACKUP with the POWER AMP breaker open now. How do you read?

We read you satisfactorily, Fred.

Okay.

Jim and Jack are in the upstairs bedroom taking a nap now.

I didn't know that was upstairs.

We have the first space station.

And, Houston, Aquarius.

Aquarius, Houston. Go ahead.

One other thing you might have somebody look at—I don't want to bother the guys upstairs—the drain hose that we've got in the command module, I wonder if we can find out if it will plug into the PLSS and in which case we can keep transferring—later on at least—the command module water into the LM via the PLSS.

Okay, Fred. You're almost up with us. We are looking real hard at getting water from the command module waste tank into the PLSS, using that hose and then dumping it from the PLSS into the LM ascent tank, and we think it is feasible; we're checking it out to make sure.

Okay.

Okay. I have time to do another maneuver here, Joe.

Okay, Fred. Let me verify that.

Fred, Houston. That is verified. You can go ahead with the yaw maneuver.

Okay. Just made another maneuver. We allowed for a little too much roll, there. I wonder if that's too much, or should I try to take it out now that I got it stopped.

Fred, this is Houston. —

Twenty degrees roll left—Yes. All right; go ahead.

Okay, Fred. I didn't copy the beginning of your message.

Okay, I—I was talking to Jim, there.

Aquarius, Houston. Over.

Go ahead, Joe.

Roger. Listen, Charlie Duke wants to talk to you—to you about the AOT star check; and, so that we can have good COMM, I'd like to reconfigure with the POWER AMPLIFIER circuit breaker in and the VOICE FUNCTION switch to VOICE and while we're at it, we'd like the RANGING FUNCTION switch to RANGING. Over.

Okay.

Aquarius, Houston. Over.

Houston, Aquarius.

Roger, Fred-o. Reading you —

Okay, Houston, Aquarius. Go ahead.

Okay, Fred-o. Reading you 5-by. The procedure I'm going to read up to you is a Sun check for the—to see if we're going to need an alinement or not. If you'll get out your G&N dictionary and open it to P52, page 34, we'll start at the bottom. Over.

Okay. Stand by 1.

Sounds like you broke out, Charlie.

Yes, finally, Fred-o. I've no longer got the red spots.

Okay. Stand by, Aquarius. We'll be back with you momentarily.

Okay.

Aquarius, Houston. You ready with your G&N dictionary? Over.

Okay. I'm on page 34 now, looking at P52.

Okay, Fred-o. At the bottom of the page, we want step 1, on the flashing 0406, we want an option 3, and that'll pull us over to 6; and, on the 5025, we want you to do the ENTER on the 5025, and that'll bring up flashing 0170, and load in R₁ 200. Over.

Okay. Let me see if I'm with you. We call up P52 and, on the flashing 0406, we PRO on a 3 REFSMMAT which leads us to a flashing 5025. We ENTER on that. On the flashing 0170, we want to ENTER a 200.

Roger. That's good, Fred-o. And that'll bring you to step 8, and you get a flashing 5018 when you PRO on the NOUN 88. Okay. At 5018, we want to do an AUTO maneuver to—to the attitude, so just do the—the PRO with the GUIDANCE CONTROL, PNGS; MODE CONTROL, PNGS, AUTO; and we'll take this attitude. Now, that's going to put us at—at attitude for the Sun check. Now, we're being a 1.4-degree deadband in this program in a docked configuration; so, to help you out, you could call VERB 62 to get your needles—and it—when the needles go through zero or null out and—in that deadband—then you take a look in the AOT and see how close the Sun is. And we want within plus or minus 1 degree. Over.

Okay. So we PRO on the NOUN 88, and we end up with a flashing 5018; and you want an AUTO maneuver here rather than using the TTCA, so we PRO with GUIDANCE, PNGS; MODE CONTROL, AUTO. We've got a 1.4-degree deadband with a VERB 62 will give us the needles to try to zero them in and, at that time I look through the AOT and, if it's like Apollo 11 Sun check, all we've got to have is the Sun somewhere in the—out there somewhere on the Sun as it passes. Is that correct?

I think that's a little tight; that's about a quarter degree. We can go a little bit out of that. Stand by 1. Fred, we'll get you an answer on that one. And also, if you'll stand by, we'll give you a DAP load for this maneuver. Over.

Okay. We'll—You'll give us a DAP load.

Roger. Stand by.

Aquarius, Houston. Fred-o, on that—to pass that check, the Sun is at—will subtend an arc of one-half degree in the AOT, so you can be two diameters off and still pass the check. Over.

Okay. It's a half a degree, and so we can be two Sun diameters off and still pass.

That's affirmative. And we want you to maneuver with a DAP of 0.2 of a degree a second. Over.

Okay. You want us to use a DAP of 0.2.

Okay. That DAP load, Fred-o, is 31120. Over.

Okay. 31120.

Roger. Now, if we pass that check, you can just terminate P52 right there, and we'll give you an attitude to go to a burn attitude, and from this we can get a star check. If you don't pass, we'd like you to do an alinement at 75 hours. And, if you're ready to copy, we have some Sun half-unit vectors and some Earth half-unit vectors at 75 hours. Over.

Stand by 1, Charlie.

Okay. Go ahead for 75 hours—Sun and Earth half-unit vectors.

Roger. First with the Sun; for X, plus 45483; for Y, plus 19053; for Zebra, plus 08262; Earth half-unit vector at 75 hours, plus 32120, minus 34155, minus 17370. Over.

Okay. Sun half-unit vectors: R₁ plus 45483, R₂ plus 19053, R₃ plus 08262; Earth half-unit vectors: R₁ plus 32120, R₂ minus 34155, R₃ minus 17370.

Roger, Fred-o. Good readback. Now, on the Earth, we estimate it—if you have to do this alinement, that the Earth will be about a 2-degree Earth. And it'll be approximately three-quarters lighted. Now, to mark on the Earth, we'd like you to take an imaginary line between the horns of the crescent and mark midway between the horns. Over.

Okay. We got a 2-degree Earth that's three-quarter lighted, and we're to imagine a line between the horns of the Earth and mark right in the center of that line.

That's affirmative. Now, on—on this star check—correction, the Sun check, Fred, at—On the 5018, I got some FDAI angles for you if you're ready to copy. Over.

Okay. You're talking about the check at 74 hours GET, right?

Roger. Okay. At 74 hours when you start this maneuver, the 5018 should look like R₁ of 2703 degrees, pitch R₂ is 0903, and R₃ of 2908. Over.

Okay. How about making those all five digit readouts; read them again, Charlie.

Okay. Pardon me. It's 27030, 09030, 29080.

Okay. The 5018 should look like R₁ plus 27030, R₂ plus 09030, R₃ plus 29080.

Roger. That's good readback. Now, we got one more procedure for you; and, right now, we got the rendezvous radar stowed and we won't be able to see anything out of detent 2, so we'd like you to position the radar to 0283; and we have a procedure for that. And we'd like you to do that right before you get the attitude. Over.

Okay. Stand by.

Okay. Go ahead.

Stand by.

Aquarius, Houston. On those 5018 angles we had at 74 hours, Fred, that was based on a VERB 49 to this attitude, and they will be incorrect for the two axis maneuvers, so you can just scratch them. Over.

Okay. You're saying the angles you gave me for the 5018, that was for a VERB 49, so they won't be good for the 5018, and we should scratch them.

That's affirmative. Okay. If you're ready to copy, I've got this rendezvous radar procedure. Over.

Okay. Go ahead.

Okay. It's about a 10-stepper, but real easy. Okay. On CB 16, EPS INVERTER 2, close. CB 11, AC BUS A BUS TIE INVERTER 2, close. Panel 14, verify INVERTER switch 2. CB 11 RENDEZVOUS RADAR 2, close. RENDEZVOUS RADAR, release. RENDEZVOUS RADAR to LGC on panel 3. Are you with me? Over.

Roger. I'm right up with you at step 6. Go ahead.

Okay, Fred. Good show. Step 6: VERB 41 NOUN 72 ENTER, plus all balls, plus 28300. Step 7: Monitor movement with VERB 16 NOUN 72. Step 8: CB 11 RENDEZVOUS RADAR 2, open. Are you with me? Over.

Stand by 1.

Okay. Go ahead now.

Roger. Step 9 is a VERB 44. Step 10: CB 16, EPS INVERTER 2, open. Over.

Okay. I got it.

Okay.

Do you want me to read it back now?

I got one more for you. You'll copy this and give me it all on the readback. Okay. Once you get the attitude and you want to use the—you want to get the AOT lamp, we got to go CB 16 EPS INVERTER 2, close; CB 11, AC BUS A AOT LAMP, close. After the P52, you can open CB 16 EPS INVERTER 2, and open CB 11 AC BUS A AOT LAMP and AC BUS A BUS TIE INVERTER 2. Over.

Okay. Stand by 1.

Okay. Let's see if I got it all. For rendezvous radar parking: first of all we want CB 16 EPS INVERTER 2, closed, CB 11 AC BUS A BUS TIE INVERTER 2, closed. Then on panel 14, verify INVERTER 2 selected. And CB 11 RENDEZVOUS RADAR 2 closed, both breakers. Then we are to pull the RENDEZVOUS RADAR RELEASE handle. On panel 3, we then want RENDEZVOUS RADAR to LGC. A VERB 41 NOUN 72 ENTER with plus all zips, plus 28300 in registers 1 and 2. GO on that. Then we monitor movement with the 16 72. After it gets parked, CB 11 RENDEZVOUS RADAR 2 open, followed by VERB 44 ENTER. And CB 16 EPS INVERTER 2 open. Now, when it comes time for the alinement to get an AOT lamp, CB 16, EPS INVERTER 2 closed, CB 11 AC BUS A AOT LAMP closed, and after the alinement is completed at CB 16, EPS INVERTER 2 open, CB 11 AC BUS A AOT LAMP open, CB 11 AC BUS A BUS TIE INVERTER 2 open.

Good readback, Aquarius. We'll—To get those needles on the VERB 62, we got to power up the commander's FDAI. We'll have that procedure for you shortly. Over.

Okay.

Charlie, Jim here.

Roger. Go ahead.

Have you run a Earth set alinement in the simulator with a docked configuration?