Spacelog Apollo 13

That's correct. Okay, now. Circuit breaker ECS TRANSDUCER, TEMPERATURE, MAIN A and MAIN B, that's two of them, closed.

CB ECS TRANSDUCER, TEMPERATURE, MAIN A and MAIN B, closed.

That's correct. On panel 4: PRIMARY ECS GLYCOL PUMPS, one, to AC 1.

Primary ECS GLYCOL PUMPS to 1, AC1.

That's correct. Okay, then we'll finish going back to the tunnel vent, and verify the LM/CM DELTA-P and make sure it's been holding pressure. And we'll come back again and rehash all of the hatch integrity check and tunnel vent procedures with you. The next thing I want to read off is the EI minus 1 plus 20. We'll go to panel 7: BMAG number 1 POWER to WARM UP.

BMAG number 1 POWER to WARM UP.

That's correct. Then at EI minus 1 plus 10, we'll perform SCS powerup per checklist, page G/2-4.

Okay. Perform SCS powerup per G&C checklist, page 2-4.

That's correct. Okay, on panel 4: SUIT COMPRESSOR NUMBER 2 to AC1.

SUIT COMPRESSOR 2 to IC1.

That's correct. SPACECRAFT CONTROL to SCS.

SPACECRAFT CONTROL to SCS.

Okay. And your MANUAL ATTITUDE switches, as you desire. We're coming up on jettison of the LM, so that's just like separation.

Okay.

Okay. And we'll do a GDC aline.

Okay. Perform a GDC aline.

Okay. On panel 8: ROTATION CONTROL POWER, DIRECT, 1 and 2, MAIN A/MAIN B.

Okay. These are circuit breakers, ROTATION CONTROL POWER, DIRECT, 1 and 2, MAIN A and MAIN B, closed.

Okay, Jack. I was thinking switch. Let me verify that's a circuit breaker, too. I think we have to get both of them.

Okay, there's those four circuit breakers over there, Ken. When you said panel 8, that's what I thought you were talking about. I don't think the circuit breakers are out right now, but why don't we just put—verify the circuit breakers and put the switches to MAIN A/MAIN B.

Okay, that's correct, Jack. Okay, at EI minus 1 hour, we're going to be doing the LM jettison; so just prior to that, we want to do a P47.

Okay, say at about 1 minute prior to LM jettison, huh?

Yes, just something that's comfortable for you.

Okay.

All right, after we've? done that, we want to get panel 8, SEQUENTIAL, PYRO ARM, two of them, ON.

Okay. I get a GO from MSFN for this?

Okay, John says we can watch it.

Okay.

All right; the next thing is CSM/LM FINAL SEP, two of them, ON, up.

CSM/LM FINAL SEP, two, ON.

That's correct. Now we're going back to panel 8, and it's SEQUENTIAL, PYRO ARM, two of them, to SAFE.

Okay. SEQ PYRO ARM, two, to SAFE.

That's correct, and go back to P00.

Okay. Go to P00.

All right. And now it's time to configure for single ring.

Okay. Configure for single ring RCS.

That's right, and since you're still an hour from EI, I guess it wouldn't hurt to use MINIMUM IMPULSE or something like that rather than the DAP, at least not until you get closer down. We'll have the DAP loads for you later.

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Okay. And as soon as you've gotten yourself all set up with a good control mode, you want to maneuver to the entry attitude.

Maneuver to entry attitude per the pad.

That's correct. And we show EI minus 55, which really means when you get to the entry attitude, we have a sextant star check for you. And that will be on the pad.

Okay. Perform a sextant star check.

Okay. And I want to remind you to park the optics at 90 degrees of shaft.

Okay. Say again why, Ken. I didn't understand that.

Okay, this is just a precaution, Jack. If we park the optics with a 90-degree shaft angle, that will line up the slits so it gives you the best airflow over that part of the heat shield and avoids a hot spot. If you don't remember it, I don't think it makes much difference. It's just good procedure.

Okay.

Okay. And after you've got it parked wherever you want it, well, turn the OPTICS POWER OFF and stow the optics.

Okay. OPTICS POWER, OFF; stow the optics.

Okay, that's good, Okay. The next thing we'll do is to initialize the EMS and that's on entry checklist page 2-1, step number 2.

Okay, perform EMS initialization per entry checklist page 2-1, step 2.

Okay, that's correct. Now we're coming up on EI minus 45 minutes, and we'll give you an entry pad and a final state vector.

Okay, at minus 45, entry pad and final state vector from MSFN.

Okay. Now we're going to perform what we call the Moon check. Rather than go into detail, if you already know what we're doing, just say so; otherwise, I'll describe the use of the Moon-attitude set.

Maybe you better describe it.

Okay, Jack. You remember everybody in the past has commented on seeing Moonset just a couple minutes prior to EI, and your horizon will probably be dark at the time that you get there; you're having an early morning entry; and coming in from the west, you'll still be looking at a dark horizon. So, just as a backup technique, just like you would track the horizon, we're going to give you an attitude which will be on the pad so that you can look directly at the Moon. This is an inertial attitude; it won't be changing, and you'll put the 36-degree window line on the Moon, and then just sit there and watch it. And just prior to EI, the Earth will come up and occult it, and you will then have a good horizon check. And I have some times, and I'll give you that later. And if you just look at this thing now, at that point you can set the GDC or whatever you desire. And you will have a known attitude reference. It's just like a horizon check.

Okay, I maneuver to the Moon check attitude; at which time I put the 36 window line on the Moon, and just prior to EI, the Earth will occult the Moon.

That's correct. And that corresponds to the same inertial attitude that you'd have on the back of your entry card where it shows the horizon attitude several minutes prior to EI; it's the same thing.

Yes, that's that one at 17 minutes prior. Okay.

Okay, and we're just getting it in a little closer. Okay, the next item on the check—checklist here is an EI minus 40; we're going to panel 7, and it's BMAG NUMBER 2 POWER to WARM UP.

Okay, panel 7: BMAG NUMBER 2 POWER to WARM UP.

That's correct. Now, I'd like to verify the SURGE TANK and REPRESS PACKAGES are ON.

Verify SURGE TANK and REPRESS PACKAGE are ON.

That's correct. On panel 5: circuit breaker ENVIRONMENTAL—CONTROL SYSTEM; WASTE WATER/URINE DUMP HEATER, two of them, closed.

Panel 5: CB ECS, WASTE H₂O/URINE DUMP HEATERS, two, to close.

That's correct. SUIT COMPRESSOR number 2 to OFF.

SUIT COMPRESSOR 2 to OFF.

That's right, Jack, and what this—what we're planning to do in order to conserve power is we're going to run the suit compressor from an hour to this point at minus 40. And we'll be watching the PCO₂; if that thing's working, we'll turn it off at the earliest time that we have a good cabin, and then we'll just leave it off. And in the event that the PCO₂ gage isn't working properly or something like that, well, we'll just go ahead and run it for this time frame.

Okay, that sounds good.