Spacelog Apollo 13

— you have plenty of water. I'm sorry we cut each other out; say again.

Okay, yes. I was going to say, understand we're going to go on the ascent tanks at 128:30.

That's right; based on the current rate, that's what they predict and you can go ahead and drink the water. No sweat.

Okay, real fine. And I've got the entry checklist out and I'm ready to copy; just give me the page.

Okay. Jack, you're starting to sound like an LMP.

I think I'm probably the only CMP that's ever witnessed an—a LM burn from inside the LM in—in space flight.

(Laughter) I hope it stays that way. Okay, Jack, we're starting on page 1-1.

Go ahead.

Okay, down in the middle of the page on line 9, we're just going to strike out the “Activate VHF for COMM checks,” and line 10, “Verify the DSE.” We're going to leave the DSE OFF, and that's to save power, as is the VHF activation.

Okay.

Okay, on page 1-2. At minus 2 hours, there's a title “Logic sequence” check; and we're deleting that entire sequence; that's included in what I read up to you.

Okay, delete the logic sequence check at minus 2 hours there.

That's correct. And delete lines 23, 24, and 25. That means a maneuver to SUPERCIRC entry attitude. Everything below that is deleted.

Okay. Delete lines 23 through 28.

That's correct. You got ahead of me. All right, on line 29 on page 1-3, we're going to put in a time of minus 00:55. That's the time we gave you for the boresight check.

Okay —

That's your sextant check, really.

Got that.

Okay, on the top of page 1-4; where it said “1 hour and 15 minutes” next to line 32, we're going to change that to “Minus 2 hours and 30 minutes.”

Okay, minus 02:30 opposite item 32.

Okay, down at the bottom of the EMS entry check right there where we are, the bottom line now reads, “EMS MODE to STANDBY.” Well, just above that—like to remind you to put a remark, “Do not initialize the range to go.” This is because you're going to come into the EMS entry check, you're going to run through all these things; then we're going to remove power from the EMS. And just didn't want you to get ahead of yourself and initialize the entry parameters, because you'll lose them when we power up.

Okay.

And, after we go EMS MODE to STANDBY, like for you to add “Circuit breaker EMS, two, to open.”

Okay, “CB EMS, two, to open.”

That's correct. And we want to delete this “Set up camera” that's listed on the bottom of the page. We're deleting that for power reasons. That's line 33 Alfa.

Okay, we're way ahead of you. We already got it stowed.

Okay. On the top of the next page where it says “Secondary water EVAP,” just keep in mind we don't plan to use the secondary evaporators unless the primary fails. On line 35 on page 1-5, next to “Command module RCS preheat,” the time is now “Minus 06:30.”

Okay, “minus 06:30,” and the voltage reading 3.9 still is good, right?

Okay, very good. Under “Final stowage,” the first thing that's listed on line 36, page 1-5, is “Optics.” And if you want to get started on your stowage, we'd like to leave the optics out, because we'll have the star check coming up quite a bit after this. The rest of that stuff can be taken care of at your convenience.

Okay.

All right, still on pace 1-5, line 37; the time is now “Minus 06:10.”

Got that.

Okay, and this is one time it looks like we might actually do the preheat, so that's the reason we want to make sure that we know that not more than 20 minutes of time on the preheat. We may not be able to watch it at that time because you aren't powered up.

That's correct. All right. Line 4 or step 4, where it shows “CM RCS check.” That occurs at minus 04:30.

Okay. Minus 04:30.

All right. Under “CM RCS checks,” the fourth line down says “MANUAL ATTITUDE, three, to MINIMUM IMPULSE.” We'll have to use “ACCEL COMMAND” and the reason for that, Jack, is we don't have the SPS powered up so there's no minimum impulse generator.

Okay. MANUAL ATTITUDE, three, to ACCEL COMMAND.

That's correct. And on the same page 2-1, strike out the last three lines, starting with “RCS transfer to service module.”

Right. The last three lines are scratched out. We ain't got one of those things.

That's correct. Okay, let's flip to page 2-2 and strike out the first two lines.

Okay. Now wait a second. I need to give you volts and amps, Ken.

All right. Go ahead.

Okay. It's 39.6, 1.12.

Sounds like you're getting there. Okay. I believe we scratched out the first two lines on 2-2. Now, we're—right below that, it says “Separation checklist.” So we're going to just delete that whole thing; it's included in the notes I gave you.

Okay. It's included in the notations.

All right. Line number 7. It says “Maneuver to horizon check attitude.” We're going to call this the “Moon-check attitude” and this is the one we discussed, Jack. The angle of 265 is not correct. I'll have one of those for you first thing in the morning.

Okay.

Okay. And at the bottom of the page, step number 1. That will be at EI minus 19 minutes, and we're off and running through a normal sequence of events.

Okay. That sounds good. Ken, I guess if you've read this thing—Is it a comfortable time line? Any areas where you had problems with?

Jack, it is very comfortable. We've run it several times now and, in fact, it's being run right now, again. And we've run it both here at Houston and at the Cape. The only place where you might find that you need to stay ahead of things is during the platform-alinement period, when you're getting ready to close out the LM and then once you get into the command module and jettison the LM, why you're back on a very comfortable time. And, of course, we'll be watching and anything we can do, like keeping track of time for you, we'll remind you of that as we go along.

Hey, that would be good—that would be good, Ken.

Okay. Let me emphasize, Jack, that 2-1/2 hours is the earliest time we can start in on that powerup stuff. Everything else you can do the way you normally would, where you get as far ahead of the game as you can. But the 2-1/2-hour time is based on saving command module consumables. And if you do that, why we're fat; we've got plenty of time to give you some fans on the water even. So that's the one point you don't want to start early on. I do have a couple of more lines to run through on the entry checklist and two pages in the G&C. And I think that will clean us up.

Okay, Ken. And G&C checklist now?

Let me finish a couple more things in the entry book. You still got that?

Yes. Go ahead.

Okay. On—These are just cleanup items, Jack. On page 2-3, it lists how you separate, from the CM/SM SEP and all that, so, obviously, if we're on step 5 at 43 minutes down—that's all deleted. And that gets deleted all the way over onto page 2-4, up to the line where it says “15 minutes.” And at that point, we pick back up and everything. From 15 minutes down is valid.

Okay. Delete item 5 down to the point where it says “Minus 15 minutes.”

That's correct, Jack. Okay, on page 2-5. The top line where we had “Horizon check,” that's now the “Moonset check” and the time is approximately 57:37. And that's minus 02:23. And that angle that's listed in the book there—177—that's really a horizon time at 2 minutes; we'll have you—can look that up on the back of your entry cue card, and I'll look that number up again for you tonight.

Okay.

Okay. Another thing is to remember when we begin blackout, which is around 05g, and you can write this in your checklist wherever it's convenient; once we've lost COMM, we're going to go ahead and power down the SCE POWER OFF and the PMP POWER OFF. And we just want to do that after you lose COMM, which comes up around EI. Any time after that, go ahead and secure the PMP and the SCE power.

Okay. When COMM is lost, SCE POWER OFF, PMP POWER OFF.

That's correct, Jack, and that completes the entry checklist. Let's look at the G&C book.

Okay. Ready to copy.

Okay. Let's go to page 2-1.

Okay. Go ahead.

Okay, Jack. The second line under “IMU powerup” says “FDAI POWER to BOTH,” and we're going to make that a “1.” The reason we're doing that is, again, to conserve power. There's no reason to drive the second FDAI before we get that information to put on it.

Okay. “FDAI POWER to 1.”

All right. That's correct. On page 2-2.

Go ahead.

Okay. Under CMC powerup, line—or step 2 says “Flashing 3700, ENTER.” The time we're going to use this, Jack, is going to be when you've just brought the computer up and it has a state vector in it that's way back many, many hours ago. So we want to do a VERB 96, ENTER to stop the integration to keep it from just sitting there ambling along. And when the ground gives you a new state vector, why then we can go through P00 and we'll be back in business.

Okay. You want me to go to VERB 37, ENTER; 00, ENTER; and then do a VERB 96?

When you come up, I guess you're going to—once you get the CMC powered up, you're probably going to be going—you're going to come up in a flashing 37, and if you'll just do a VERB 96, ENTER right there, that will take care of it.

Okay.

All right. And the last one I have for you is on page 2-4.

Okay. Go ahead.

Okay. Under the SCS powerup, the first line says “AUTO RCS SELECT, 16, to OFF.” Okay. You can just delete that part. On the fifth line, it says “Circuit breaker SCS LOGIC POWER,” that's really “LOGIC BUS, four of them, to closed.” The DELTA-V CG is not important since we are not burning the engine. The “SIGNAL CONDITIONER/DRIVER BIAS POWER” lists “Two to AC 1.” We are going to make that just one of them; make it “SIGNAL CONDITION/DRIVER BIAS POWER, one, to AC 1.” The “BMAG POWER,” which is the third line from the bottom, says “BMAG POWER, two, ON;” we are going to make that just one. We'll bring up number 1, and we'll make “FDAI POWER, number 1” and the last line “AUTO RCS SELECT, 16, enable,” you can strike that off and replace it with “BMAG MODE, three of them, to RATE 1.” You want to try reading that back?

Okay. Delete “AUTO RCS SELECT, 16, OFF.” Change “CB LOGIC POWER” to “LOGIC THRUST POWER—CBS CS LOGIC THRUST, four, to closed.” Delete “DELTA-V CG,” coming down here “SIGNAL CONDITIONER/DRIVER BIAS POWER, one, AC 1; BMAG POWER, 1, to ON,” and it's the number 1 BMAG. “FDAI POWER to 1; BMAG MODE, three, to RATE 1,” deleting the “AUTO RCS SELECT, 16, to enable.”

That's correct. You've got them all, Jack. Very good. Thank you.

Thank you. This does it, huh?

Yes, sir. Let's see—just a second—let me check on this hatch and integrity check maybe I can tell you something about that. And I do have an answer to your LM power question about the umbilicals. The umbilicals will be unpowered according to the LM procedures, so if you'd like to disconnect them, you can.

Okay. I think we will.