Spacelog Apollo 13

Okay. Did you have any trouble controlling the vehicle, and what techniques did you use?

Briefly, to control pitch and roll, use the TTCA, as we've practiced; for yaw you can use the ACA. Over.

Okay. You have no special techniques going back and forth between the yaw and the X and Y lines. Over.

Not right now, Jim. Dave Scott's been running these things and we'll get them up to you shortly. Over.

Okay.

We think the alinement's going to be okay, so we don't have to do this P52 fullup alinement. We think the check is going to be okay. Like to remind you since you are in ATT—if check does not pass, since you are in attitude for the Sun, that we'd—We want the Sun half-unit vectors first. Over.

Roger. Understand.

Okay, Houston. It's been over an hour since we did our last PTC. You want us to do another one now?

Stand by 1. Over.

Aquarius, Houston. We'd like you to go ahead and yaw 90 for the PTC. Keep a close eye out on your middle gimbal angle. You're about 30 degrees from gimhal lock, and we'll call you an OMNI switch halfway through the maneuver. Over.

Roger.

Okay. And, Houston, Aquarius. You might know when you've had enough ranging so we can get the power amp back off again.

Roger, Fred-o. We got one more procedure, and we can shut it down, and that's to get the needles and the FDAI for this maneuver. That 5018 could take you to gimbal lock, and we think it's a good idea to power up the commander's ball. We've got a four-stepper, if you're ready to copy. Over.

Okay, Go ahead.

Okay. Verify that you got AC power, in other words, the INVERTER 2 selected and the BUS TIE INVERTER 2 AC BUS A closed. We'll be under FLIGHT DISPLAYS, GASTA closed, commander FDAI, closed. On the AC BUS A, CBs GASTA closed, CONBIANDER FDAI closed. Over.

Okay. It's verify we have AC, which is panel 16 INVERTER 2 closed. CB INVERTER 2 closed. Then on panel 11 under FLIGHT DISPLAYS, we want the GASTA and the COMMANDER's FDAI breakers closed. Also under panel 11, AC BUS A GASTA and COMMANDER's FDAI breakers closed.

That's affirmative. Over.

Aquarius, Houston. After the OMNI switch, we would like you to get the ranging off, the VOICE switch to DOWN VOICE BACKUP, and the POWER AMP CB on 16 open. Over.

Okay. After the OMNI switch, we'll get the POWER AMP off and go back to DOWN VOICE BACKUP FTA and the RANGING off. It's your call.

Roger. Stand by.

Fred-o, we got about 2 minutes to the OMNI switch. You can go ahead and power the RANGING down and and the DOWN VOICE BACKUP, and we'll give you a call on OMNI switch. Over.

Okay.

How do you read Aquarius now on DOWN VOICE BACKUP?

Roger, Aquarius. We are reading you about the same, about 2-by.

Okay.

Aquarius, Houston. Select FORWARD OMNI. Over.

…

Do you read down there, Houston?

Apollo 13, Houston. We read you weakly. Go ahead.

Okay. Vance, if Buzz or Neil are around you might ask them if they had to use the AOT lamps to shoot the Sun like they did on 11.

Well, where's the …

Right down below me here?

Fred, breaking in. You're very weak. Understand if Buzz or Neil are down here, you'd like to ask them if they used the AOT lamp to what? Over.

To see the Sun, Vance. It might be possible to see the reticle without even having the light on.

Oh, I see. See if it's possible to see the reticle without the light on. Okay. We'll make a check. And one other thing, you might move that rendezvous radar antenna to park any time now. You can start any time you want.

Okay.

… it's out of the way.

Apollo 13, Houston.

Go ahead, Vance.

Jim, Neil is here. He advises that you will not need the lamp on for the Sun check but that you will need it on for the Earth check. Over.

Understand.

Okay. Let's park the radar. Are you ready?

Okay. Let me—First of all, let me see how we're doing here. That's going down. That's better. That's coming up. That's right. Let's—Okay. Let's park the radar. How—How long is it going to take?

Not too long. Okay, INVERTER 2 … Here, hold the light for me, Jim. Right here on the … panel. Hold it still. … AC BUS A BUS TIE.

Okay.

AC BUS A.

Okay.

BUS TIE INVERTER 2.

BUS TIE INVERTER 2. PRO.

Okay. Panel 16 verify and select INVERTER 2.

Okay.

Okay. On CB 11, give me the RENDEZVOUS RADAR breakers, with 30-second spread.

Okay. … at 15, I …

Okay. … 30 seconds.

Okay. Go ahead.

Right.

Okay. Thirty seconds. AC breaker.

Okay. Got a big dip.

Okay. Reach up here and give me the … panel …

Okay. She's pulled.

Okay. Panel 3, check the LGC.

LGC.

Okay. Give me a VERB 41 NOUN 72.

Still going good, right?

Okay. And they're all zips, 28300.

00.

Go.

… 16 72 …

It's going now. … signal light.

Right.

… is running away. Docking light.

What?

Command module docking light. Okay. You got them. They're in.

Okay. Two RENDEZVOUS RADAR breakers, pull them. … …

…

CB 16 INVERTER 2 open.

Okay.

You know that light on the command module …?

Apollo 13, Houston. Over.

… get that thing …

Roger. One correction. We think that the cheapest way for you to maneuver to change attitude is with minimum pulse ACA. That's to do the star mark.

We had—Okay. As soon as possible we'll get that star data … we can get to maneuver attitude by using TTCA.

Roger.