Jack Lousma was advising Lovell that we have ... as I said before, about 161 hours of water on the LM ascent/descent stage based on current consumption rates and this does not include water in which we have available in the command and Service Module or in the portable life support systems, which would extend that margin somewhat beyond the 161 hours.
And for some 45 minutes or so a fairly sizable group ... about a dozen people or so, have been gathered around the flight director's console, discussing the procedures to be followed during reentry. Lovell just asked Jack Lousma what their procedure was being planned for the oxygen purge systems, the emergency oxygen supply carried with the backpack and lithium hydroxide canisters available. On these, Lousma told him that we haven't reached a conclusion on that. The meeting going on around the flight director's console at this time, is involved with that sort of thing. As well as what procedures to be followed as far as jettisoning the LM and Service Modules ... all of these things being considered and discussed. At the present time Apollo 13 is 139,164 nautical miles from the Earth travelling at a speed of 4,745 feet per second. Also like to clarify again the situation with respect to the super critical helium tank and the burst disk which ruptured at about 180 [means 108] hours ... when the pressure got up to some 1937 pounds per square inch. This burst disk is in the tank for the express purpose of keeping pressure from going above levels which the tank can withstand. Had the disk failed to rupture, we had a backup procedure worked out whereby the tank would be vented manually. Of course, it was not necessary to put this backup into effect because the disk ruptured at about the level it was expected it would. With the burst disk rupturing, what we have effectively lost is the ability to resupply a pressure to the tanks as this pressure is drained off by burning the descent propulsion system engine. However, we do have what is called blow down capability in the engine. That's the pressurization that already exists and which is not lost by depressurizing the supercritical helium tank. This ... the pressure that is in the propellant tanks remains there, is isolated from the supercritical helium tank and is not lost when the burst disk ruptures. With this pressurization we still have some 800 feet per second of Delta-V remaining and usable in the Descent Propulsion System engine.
111:04:47 Swigert: Okay. I'll relay that to Jim. [Long pause.]
111:05:09 Lousma: Jack, of course, the reason for all of this is that we see we're 20 amp-hours short on one of the entry batteries, and we've got to juice that up to get you home with.
111:05:30 Lousma: Okay. Now, what we owe you from here on out is the actual battery A charge procedure, and then a procedure to turn this all around, again. [Pause.]
111:05:48 Swigert: Okay. Do you have it there, and how long is it [garble]. [Long pause.]
111:06:15 Lousma: Okay, Jack. I have the procedure in front of me. It's about 18 steps, and the reason it's so long is because we're starting from this basic configuration which we gave you earlier. It concerns a charge on battery A, of course, which is our low one. So, when you're ready to copy it, let me know.
111:06:40 Swigert: Okay. Let's go at it.
111:06:46 Lousma: Okay. Are you ready to read ... copy it?
111:06:53 Swigert: Go ahead.
111:06:54 Lousma: Okay. On panel 250, circuit breaker Bat A, Power Entry/Postlanding, close; on panel 275, circuit breaker Inverter Power 2, Main B, close. Next several circuit breakers are on panel 5; circuit breaker Bat Relay Bus, Bat A, close; circuit breaker EPS Sensor Unit, AC Bus 2, close; CB EPS Sensor Signal, AC2, close; CB Battery Charger, Main B, close. Are you still with me? [Pause.]
111:08:28 Swigert: Okay, Jack. I'll read back those steps you gave me so far. Panel 250 CB Bat A, Power Entry/Postlanding, close, panel 275, CB Inverter Power 2, Main B, close; panel 5, CB Bat Relay Bus, Bat A, close; CB EPS Sensor Unit, AC Bus 2, close; CB EPS Sensor Signal, AC2, close, CB Bat Charger, Main B, close. [Pause.]
111:09:06 Lousma: Okay. Good readback, Jack. The only one is number 1 ... number 4. I didn't get your readback, but it's EPS Sensor Unit AC Bus 2, close. You got that?
111:09:22 Swigert: Yes. I read that back CB EPS Sensor Unit, close.
111:09:30 Lousma: Okay. To continue ... to continue on ... the same panel, panel 5: circuit breaker, Battery Charger, AC Power, close; circuit breaker Battery Charger, Bat A Charge, close; circuit breaker Inverter Control 2, close; circuit breaker Inverter Control 3, close; I've got a switch for you, Main Bus Tie, Bat A/C, Off; and another switch, Battery Charge to AC2. Read those back. [Long pause.]
111:10:51 Swigert: Okay, Jack. CB Bat Charger to AC Power, close. Stand by. Okay. I had to get a light here. CB Bat Charger, Bat A Charge, close; CB Inverter Control 2, close; CB Inverter Control 3, close; the two switches, Main Bus Tie, Bat A/C, Off; and the second one, Bat Charger to AC2.
111:11:30 Lousma: Okay. That's a good readback. How about reaching over there on your right-hand side and turning the Biomed off? See if we can improve the Comm a little bit. [Long pause.]
111:12:02 Swigert: Okay. How do you read, now?
111:12:03 Lousma: Okay. I'm reading you real good now, and I want to verify that the main bus tie that we switched Off was Bat Alpha Charlie.
111:12:15 Swigert: That's verified; Main Bus Tie, Bat Alpha Charlie, Off. And that should [garble].
111:12:22 Lousma: Okey. And in panel 3, I've got a switch for you. AC Inverter 2 to Main B. [Pause.]
111:12:39 Swigert: Okay. AC Inverter 2 to Main B.
111:12:42 Lousma: Okay. And switch Inverter 2, AC Bus 2 to on; and another switch, AC Bus 2 Reset, to reset and center; switch Battery Charge to Alpha; switch DC Indicator select Bat Charger, and then what we want you to do is to report the charger current and voltage to MSFN every l0 minutes for the first half hour, and then once every 30 minutes after that. And that'll be on our call, Jack. Read back the switches that I just gave you. [Long pause.]
111:13:58 Swigert: Okay, Jack. It's panel 3, AC Inverter 2, Main B; Inverter 2, AC Bus 2, on; AC Bus 2 Reset to reset and center, Bat Charger to A, AC Indicator select to Bat Charger. Report amps and volts to MSFN every 10 minutes for the first 30 minutes, and then every 30 minutes on a MSFN call.
Flow chart of the Command Module Electric Power System. To charge the battery A for now, they need to set up the circuit breakers and switches so that electric current may flow from the LM Umbilical to DC Main Bus B. From, there, the LM battery current is connected to the battery charger through Main Bus B for the DC power, and to one of the inverters to supply AC power to the charger. The battery A itself is connected to the system through the Battery Bus. The charge procedure is normal besides the source of the electric power coming into the charger, which would normally be supplied by the fuel cells.
111:14:29 Lousma: Okay. That's a good readback, Jack. Now the only thing we owe you is a turnaround from this, which we will have.
111:14:40 Swigert: Okay. Let me ask one question, here. About how long do you think it'll take to charge these batteries?
111:14:45 Lousma: It's going to take you about 15 hours. [Long pause.]
111:15:09 Swigert: Jack, about how many amperes of LM power will this 15 hours [garble]? [Pause.]
111:15:21 Lousma: Stand by. We'll get it for you ...
111:15:22 Swigert: How many, Jack?
111:15:26 Swigert: Okay. He got it. He got the question. [Long pause.]
111:15:49 Lousma: Okay, Jack. That's going to take 120 amp-hours out of the LM, which is equivalent to 10 hours, which will put us back to 193 hours, and that's plenty.
111:16:07 Swigert: Okay. Let me relay that to Jim here. It'll be 120 amp-hours, which leaves us ... which puts us back from 203 hours [garble] to 193 hours.
111:16:20 Haise: Yes, there's that much to spare. [Pause.]
111:16:35 Haise: Okay, Jack. One question here. If we have any problem setting up this LM power to the CSM, is the quickest way to get out of it, return to the normal configuration, as it is for me to just switch the LM Power to CSM to Reset then Off? [Pause.]
111:16:57 Lousma: Stand by 1.
111:17:02 Swigert: I would like to give one quick step in case that gave Jim report some sort of problem for us to get out of it quickly.
111:17:11 Lousma: Okay. Let us talk it over for a minute, Jack.
111:17:16 Swigert: Okay. Real fine. And while you guys are talking it over, you might read back ... Have you got the procedure for reversing this? I'll copy that.
111:20:00 Swigert: Okay, Jack. Are you with me?
111:20:03 Lousma: Yes. We're still here, Jack. What we want to do is follow you through on this, so we're going to get high bit rate to do it. In answer to your question, to undo this procedure quickly, in the event a problem develops, be sure that you don't touch the LM Power switch because it's got a Reset position. But the way to undo it; is go into the CSM and on panel 5 open two circuit breakers. And they're some of the first ones we read to you. Open LM Power-1 Main B, and open LM Power-2 Main B. You copy that?
111:20:45 Swigert: Okay. Understand. If I want to get out of this real quickly, I have to open just two circuit breakers in the CSM; that's on panel 5, LM Power-1 Main B, LM Power-2 Main B.
111:20:58 Lousma: Okay. And before you go ahead with this, let's establish high bit rate and wait 1 on that. And then as we go through the procedure we want you to wait when you get power on Main B so we can take a look at Main B without any loads on it before we start charging the batteries. [Pause.]
111:21:31 Swigert: Okay. I understand you want high bit rate on the LM or CSM just before we start this?
111:21:40 Lousma: That will be high bit rate on the LM, and stand by for it.
111:21:45 Swigert: Okay. [Pause.]
111:21:52 Lousma: Okay, Jack. Before we go ahead with this, what we want to do is read you the reverse ... the normal reverse procedure.
111:22:00 Swigert: Okay. I'm ready to copy. [Long pause.]
111:22:56 Lousma: Okay, Jack. I got the start on how you reverse this procedure. Ready to copy?
111:23:04 Swigert: Go ahead, Jack.
111:23:06 Lousma: Okay. First you want to reverse the battery charge procedure. To do that, on panel 3, switch Battery Charge, Off; AC Inverter 2, Off; panel 5, Main Bus Tie Bat Alpha Charlie, On, up; panel 250, circuit breaker Bat Alpha, Power Entry, and Postlanding, Open. Read back. [Long pause.]
111:23:59 Swigert: Okay, Jack. On panel 3, Battery Charger, Off, AC Inverter 2, Off; on panel 5, Main Bus Tie Alpha Charlie, On; panel 250, CB Bat A, Power Entry and Postlanding, Open.
111:24:23 Lousma: That's affirmative, Jack, and then if you'll go back to the rest of the circuit breakers on that list, and just opposite ... Open them all up. Stand by 1. [Long pause.]
111:24:52 Lousma: Okay, Jack. Go back to the battery charge procedure I gave you. And, in order to terminate charge, just ... You'll just have to write "Open" or "Off" next to the circuit switch that I gave you. So on panel 250, that circuit breaker you've already opened; on panel 275, Inverter Power-2 Main B, open; panel 5, Bat Relay Bus Bat A, open; EPS Sensor Unit AC Bus 2, open, EPS Sensor Signal AC2, open; Battery Charger, Main B, open; Battery Charger AC Power, open; Battery Charger, Bat A Charge, open; Inverter Control 2, open; Inverter Control 3, open; you've already done the Main Bus Tie; and then Bat Charge switch to AC 1. Over on panel 3, you have already set the AC Inverter 2 to Off and then Inverter 2 AC Bus 2, Off; AC Bus 2 Reset to Off. You have already put the Battery Charger switch to Off; and your DC Indicator select to Main B. Over. [Pause.]
111:26:46 Swigert: Okay, Jack. Do you want me to read it back to you?
111:26:51 Lousma: No, if you've got something in the right-hand column for all of those, we don't want to have to do it. And now one more thing I owe you is how to untransfer LM power to the CSM, and I'll get that for you in a jiffy.
111:27:22 Swigert: Okay. I'll be standing by to copy it.
111:27:25 Lousma: Okay. We have a last minute change to that.
This is Apollo Control at 111 hours, 30 minutes. The procedure being read up to the crew by CapCom Jack Lousma, is for recharging one of the three entry batteries on the Command Module; battery A which is down about 20 amp-hours. A full load on the entry batteries is nominally about 40 amp-hours, and we understand the other two batteries, B and C are essentially fully charged. Battery A is down about 20 amp-hours and their plan is to replace the energy in the Command Module battery A with electrical energy from the Lunar Module. This procedure will require about 15 hours of charging time, and will draw a total of about 8 amps from the LM.
111:32:23 Swigert [Garble] but I just want you to figure up [garble] and show me when to power up and [garble]. Yes I think so. [Garble]. [Long pause.]
111:33:12 Swigert: Houston, 13. [Pause.]
111:33:23 Lousma: Go ahead.
111:33:27 Swigert: Okay, Jack. One thing ... I guess you probably all have considered it, but what heavy things can we store down there where the SRCs normally go to help increase our L over D?
111:33:43 Lousma: I understand the question is what kind of heavy things can you store where the SRCs go.
111:33:50 Swigert: Yes. They go down in the LEB underneath the computer, and the heavier things you have down there increases the L over D. We don't have any SRCs, so I was just wondering what heavy things ... We could probably put some cameras, television cameras, things like that that normally pretty heavy down there in ... that, in our SRC. No, we can't, put the in our SRC, but we could put them in that container down there which would help decrease our L over D. Anything else you can think of would be greatly appreciated because we don't even have a throw away station, so we're down a little bit in L over D.
111:34:33 Lousma: Okay. Let me pass that question along, and get somebody working on it. [Long pause.]
During re-entry, the center of gravity in the Command Module is deliberately offset so that the capsule attempts to maintain a lopsided attitude with respect to the airflow. This allows them to modify the relationship of the drag (how much the atmosphere is slowing them d own) and the lift (how much their hull, acting as a wing, is working to keep them flying instead of plummeting down.) To maintain this position, the weight onboard is unevenly distributed.
111:35:03 Lousma: Souvenirs, I guess.
111:35:09 Swigert: What souvenirs? [Laughter.] All I've got is a Marine Corps foxhole-digging shovel.
111:35:19 Lousma: You've got all you need then, buddy. [Pause.]
111:35:27 Lousma: Okay. Ready to copy the power removal from the Command Module/LM umbilical.
111:35:35 Swigert: I'm ready to copy. Go ahead.
111:35:40 Lousma: Okay. This assumes that all the descent batteries are on line and Ascent Battery 6 is on Normal Feed, as we said earlier. First thing you do is go in the CSM and look on panel 5 circuit breaker. LM Power-2 Main B, open; LM Power-1 Main A, open; circuit breaker EPS Sensor Signal Main B, open.
111:36:18 Swigert: Hey, Jack.
111:36:20 Lousma: Go ahead. [Pause.]
111:36:31 Swigert: [Garble]. You got just a little bit scratchy there because of the antenna problem. Let me read this back to you. [Long pause.]
111:36:53 Swigert: Okay. What I got, Jack, was the procedure assumes that all Descent Batteries are On, and Bat 6 is on Normal Feed. Now we're going into the LM and on panel 5, we take LM, or CB LM Power-2, Main B, open. And that's as far as I got.
111:37:18 Lousma: Okay, the second one is on panel 5 also. Circuit breaker, LM Power-1, Main A, open; circuit breaker EPS Sensor Signal, Main B, open. Okay, read those back for the CSM, and I'll give you some steps in the LM. [Pause.]
111:37:40 Swigert: Okay. [Long pause.]
111:37:58 Swigert: Okay. CB LM Power-2, Main B, open; CB LM Power-1, Main A, open; CB EPS Sensor Signal, Main B, open. Stand by 1, Jack. [Pause.]
111:38:15 Swigert: Jack, I don't think we ever closed CB LM Power-1, Main A. We closed LM Power-2, Main B, and LM Power-1, Main B. Both of them on Main B. [Pause.]
111:38:36 Lousma: Yes, you're right. Both of them should be Main B.
111:38:42 Swigert: Okay. Copy that.
111:38:47 Lousma: Okay. Ready to copy the LM?
111:38:52 Swigert: Okay. Go ahead.
111:38:55 Lousma: Okay. On panel 16 circuit breaker, EPS, Bat Feed Ties, two, open; and now you've got to listen real carefully for high volts and low volts, Battery 1, High Volts, to Off/Reset; Battery 2, Low Volts, to Off/Reset and then On: Battery 2, High Volts, to Off/Reset and then On; Battery 1, High Volts, On; and then the circuit breaker on panel 16, EPS: Bat Feed Ties, both of them, closed. Read back. [Pause.]
111:40:20 Swigert: Okay. On the LM side of the house is on panel 16. CB EPS Bat Feed Ties, two, open; Battery 1, High Voltage, Off/Reset; Battery 2, Low Voltage, Off/ Reset then On; Battery 2, High Voltage, Off/Reset then On; Battery 1, High Voltage, On. Panel 16, CB Bat Feed Ties, two, closed.
111:40:56 Lousma: Okay. That's a good readback. It concludes the procedure going both ways and now we just have to stand by.
111:41:06 Swigert: Okay, when do you plan to start this?
111:41:10 Lousma: Darn soon.
111:41:15 Swigert: Did you say not soon?
111:41:17 Lousma: No, we're going to do it pretty soon, but we want to have high bit rate, and we don't want you to give that to us until we tell you.
111:41:29 Swigert: Okay. I think I'll go back and try to undamp up there. Do you have anything more for the Command Module?
111:41:43 Lousma: We're discussing two items, but we don't have them ready right now. [Pause.]
111:41:56 Swigert: One of them, I hope, is a foolproof alignment procedure. [Long pause.]
111:42:37 Swigert: Okay, Jack. Just for curiosity's sake, does FIDO have any information as to whether that helium ... that SHe tank dump affected our trajectory at all? [Long pause.]
111:43:21 Lousma: Okay, Aquarius. Our tracking data shows that since the helium dump, our entry angle has not changed from its value of 6.24, and somebody calculated that if we had a propulsive vent, that helium could roughly, at the maximum, only impart a Delta-V of a half a foot per second or less, anyway. But we're continuing to track and as soon as we get some more info, we'll pass it along.
111:43:57 Swigert: Okay. That's swell, Jack. Thank you.
111:44:01 Swigert: Your 6.24 sounds good. [Long pause.]
111:44:14 Swigert: I'm still awake, I guess. [Pause.]
111:44:22 Swigert: They said that it would be a while because they want to get high bit rate. They don't want to put high bit rate. [Garble].
111:46:40 Lousma: Okay, Aquarius. We're ready. So we want some high bit rate. To do that, go over to panel 16 under Comm and close the Primary S-Band Power Amplifier. On your Comm panel ...
111:46:56 Swigert: Okay. Okay, Jack. Wait 1. While ... I'd like to get the whole crew up for this if you don't mind.
111:47:09 Swigert: [Garble] they're ready to start. Yes, you want to get Freddo up. [Pause.]
111:47:20 Swigert: We want to transfer some power ... I want to go to high bit rate here first, then want to transfer LM power to CSM, Fred. [Pause.]
111:47:39 Swigert: Okay, Jim, I'll give you the Comm.
111:47:40 Lousma: Aquarius, there's no great big rush. If you want to let Fred come up to speed slowly, why maybe that'll help out. [Long pause.]
111:47:55 Swigert: Okay. [Garble]. [Long pause.]
111:48:47 Lovell: And Houston, Jack is showing Fred the procedures before we start up. [Pause.]
111:48:57 Lousma: Say again, Jim.
111:49:02 Lovell: [Garble].
111:50:27 Lousma: Aquarius, How do you read?
111:50:32 Lovell: Loud and clear.
111:50:33 Lousma: Okay. I'm hearing you now. I think I missed your last transmission, Jim.
111:50:41 Lovell: Okay. Jack is showing Fred the procedures. Want to get him familiarized with them, and how to get out of any problems before we proceed.
111:50:54 Lousma: Roger. No rush. Just let us know when you're ready. We don't want old Freddo to slip a gimbal there. [Pause.]
111:51:05 Lovell: Yes. We're watching him.
111:53:24 Lovell: Boy, if you took 120 hours out. Oh. [Garble]. Okay. [Garble]. Have I done what? [Long pause.]
111:54:15 Haise: Houston, Aquarius.
111:54:18 Lousma: Hello, Fred. Go ahead.
111:54:23 Haise: Okay, I guess the only question I have is in the first ... the very first portion involving the LM here where it has me turn on the only Bat 6, and then turn off all the Descent Batteries. Are you still reading me?
111:54:53 Lousma: Okay. I read you until after turn off Bat 6 ... Correction, turn on only Bat 6.
111:55:03 Haise: Okay, the question is "Only one Ascent Battery Bat 6 on the line," immediately followed by turning off four Descent Bats. Is that correct?
111:55:18 Lousma: That's affirmative, Fred. That question has been banged around and we decided to go that way. [Long pause.]
111:55:38 Haise: Let's see, we will be powering other Bus via the Cross Tie Balance Loads breaker. Is that correct?
111:55:47 Lousma: That's affirmative, and we're reading a current of 11 amps right now. [Pause.]
LM Ascent Battery switches. Original scan via heroicrelics.org
111:55:55 Haise: Okay. Okay. I guess I'm ready, then. That's how many amps?
111:56:00 Lousma: And after you turn Bat 6 on the line, you might as well take a look at the Bats 1 through 4 and so forth, and make sure that it's okay to turn them off. [Pause.]
111:56:16 Haise: Roger. Are your ready, gang?
111:56:21 Lousma: Yes, we're ready for the Power Amplifier and the High Bit Rate, and Normal Voice, on the Function switch, please.
111:56:32 Haise: Okay. [Long pause.]
LM comms control panel. They turn on the power amplifier so as to able to consistently transmit the high bit rate telemetry and use the normal voice on the S-Band. Mission Control wants the high bit rate so that they can monitor the batteries during the beginning of the power transfer procedure. Original scan via heroicrelics.org
111:56:58 Lousma: Okay, gang; we've got High Bit Rate, now.
111:57:04 Haise: Roger. [Long pause.]
111:57:29 Lousma: Okay, we see Bat 6, On, and it looks good, Freddo.
111:57:38 Haise: Okay. Am I cleared to proceed with the next step, getting 1, 2, 3, and 4, Off/Reset?
111:57:46 Lousma: Affirmative. You're cleared for Bats 1 through 4, Off/Reset.
111:58:13 Lousma: Okay. Still looks good. [Long pause.]
111:59:13 Haise: Okay, Houston. We need a call from you when to have Jack to proceed up into the Odyssey and start up there. [Pause.]
111:59:31 Lousma: Okay, Aquarius; and Jack can get with it right now.
112:06:11 Haise: Okay, Houston; Aquarius. We've completed the powerup and things look good upstairs. Are we Go for proceeding with battery charge? [Pause.]
112:06:28 Lousma: Okay, Aquarius; you're Go on the battery charge.
Command Module battery arrangement. Three silver-zinc rechargable 40-amp-hour batteries are located at the bottom of the CM, sandwiched between three AC inverters and control equipment. The two Pyro batteries (A and B) are located there as well and provide a separate source of power for the sequential systems. A gas line is connected to each of the battery containers in order to vent out any hydrogen gas that the batteries may produce.
112:07:36 Haise: Boy, this is really a switch, isn't it, Jack? [Pause.]
112:07:48 Lousma: That's an understatement. You're not known for that.
112:07:54 Haise: Yes. I think if you add up the ... Yes ... if you add up the operating time, I think the LM beats the CSM by a considerable margin on this flight. [Long pause.]
112:08:34 Lousma: Grumman just hired you.
112:08:38 Haise: Yes. [Long pause.]
One iteration of the infamous towing bill. Via NASA History Office.
112:08:51 Lousma: You're out there at 134,000, coming in at about 4,900 feet a second. [Pause.]
112:08:58 Haise: Very good.
112:10:04 Lousma: The Supercrit tank went off at about 1937 just about like it expected.
112:10:11 Haise: Yes. It ... it also must of not did very much, except the rates. I was asleep then and I didn't hear a thing. [Pause.]
112:10:25 Lousma: Is the command ... Service Module still venting? [Pause.]
112:10:36 Haise: Jack said it was just before he went up. Right now, the Sun's over there, and I can't really tell ...
112:10:36 Haise: ... I'll look again in a minute.
112:10:44 Lousma: We asked him a long time ago if he was able to see any stars out the optics. I don't think we ever got an answer.
112:10:52 Haise: Okay. [Pause.]
112:11:04 Haise: That's a pretty good sleep station I had rigged up, Jack. I took one of the sleep restraints out of the Command Module, zipped up in it, and then hooked the tie, right at the top of the zipper, onto the LM upper hatch handle. So it kind of held me there, and then just drifted up in the tunnel upside down with my face toward the hatch, so the sunlight didn't get in my eyes and that worked pretty good.
112:11:35 Lousma: Did you sleep pretty well that way?
112:11:39 Haise: Yes, no problem at all.
That's Fred Haise talking.
112:11:44 Lousma: Is Jim sleeping that way now, or is he standing next to you?
112:11:49 Haise: He's standing next to me.
112:11:51 Lousma: About time for him to go to bed.
112:11:57 Haise: Okay. The voltage upstairs is 34.3 and the charger is reading 2.5 amps.
Command Module DC Bus power displays, which are also used to monitor the battery charge. The amperage of the battery charge is read from the special inner scale running from 0 to 5 amps. Original scan via heroicrelics.org.
112:12:06 Lousma: Okay 34.3 and 2.5. And [garble] says [garble] ...
112:12:11 Haise: ... pretty cold. Good.
112:12:12 Lousma: Say again your last.
112:12:16 Haise: They came ... both came down here rubbing their hands, shivering. It's pretty cool upstairs. [Pause.]
112:12:26 Lousma: Are you keeping warm in the LM? [Pause.]
112:12:41 Haise: Yes. It's pretty reasonable down here. [Long pause.]
112:13:25 Haise: Okay. And right now, it looks like [garble] right now, it looks like the Command Module isn't venting, Jack, so I'm going to try to take a look at the optics.
112:13:48 Lousma: Okay. You say it is not venting?
112:13:52 Haise: Yes. That's the word. We've just looked through the AOT and you can't see anything back there.
112:14:00 Lousma: Okay. And everything's fine in El Lago.
112:14:06 Haise: Very good.
112:15:42 Lousma: Aquarius, we're ready to secure the high bit rate.
112:15:48 Haise: Okay. [Long pause.]
112:16:32 Haise: Houston, Aquarius; how do you read?
112:16:38 Lousma: I'm hearing you with a lot of background noise, Freddo.
112:16:42 Haise: Okay. How now? I just switched Omnis again.
This is Apollo Control at 112 hours, 18 minutes. The crew at this point has successfully completed the transfer of power from the LM onto the Command Module Main Bus B, and from there into the Battery Charger which is charging Battery A, one of the 3 entry batteries used for entry and post landing electrical power aboard the Command Module. The hope is to bring this battery from its current level of 20 amp-hours up to about 40 amp-hours which would be essentially a full charge on Battery A, the other two batteries, Battery B and C, already being at full charge. The charging operation on Battery A is expected to require about 15 hours, and it began at 112 hours, 12 minutes Ground Elapsed Time. You heard Fred Haise report that Jim Lovell and Jack Swigert had gone into the Command Module to power up the Battery Charger and check on the readings there. When they came back down, Fred said they were rubbing their hands, and noted that it was a bit chilly in the Command Module. At the present time Apollo 13 is 133,158 nautical miles from Earth and the spacecraft velocity is up now to 4,891 feet per second. We're 30 hours, 20 minutes, 50 seconds from reentry, and according to the revised Flight Plan at 112 hours the three crewmen should be getting something to eat and also you heard CapCom Jack Lousma advise Jim Lovell that it appears to be about time for him to get a bit of rest. The crew rest cycle has been left up to them. Our Flight Plan on one of the large displays here in Mission Control has some suggested times for sleep, but the crew has generally been working out their own sleep schedules as convenient for them, and following it, and we don't have an extremely good idea of when they plan to in advance, but only add to the fact when they report to us that they have gotten some sleep. At 112 hours, 21 minutes; this is Apollo Control, Houston.
Lousma: Aquarius, could you get a ... amps and volts readout from Odyssey, please? [Pause.].
112:23:45 Haise: Okay. Stand by. [Long pause.].
112:24:08 Haise: The CMP is dotting across there. You'd be amazed at how proficient you get at transfering to the tunnel after the first 1000 times. [Long pause.].
112:24:31 Lousma: I didn't get your last there, Freddo. We'd like you to verify that your Power Amplifier circuit breaker is open. [Pause.].
112:24:44 Haise: Okay. That's verified. Power AMPL breaker is open.
112:24:48 Lousma: Roger. [Pause.]
112:25:00 Haise: Okay, Jack; that's 34.6 volts and just a little bit under 2.5 amps.
112:25:08 Lousma: Okay, Fred. I copied 2.5 amps. Say again the volts, please.
112:25:15 Haise: 34.3 and that was just a little bit below 2.5.
112:25:21 Lousma: 34.3; thank you. [Pause.]
112:25:33 Haise: Okay. [Garble] point [garble]. [Long pause.]
112:26:06 Lousma: Freddo, I didn't copy the last. Say again the voltage, please. [Pause.]
112:26:17 Haise: Okay, and the voltage is 34.6 ... 34.6, amps slightly less than 2.5.
112:26:26 Lousma: 34.6 and a little below 2.5. Thank you.
112:26:34 Haise: We're ... the way we are torquing around to the side here, Jack ... We are getting some intervals where I can't hardly get to it with either of the Omnis.
112:32:52 Haise: Houston, Aquarius.
112:32:54 Lousma: Go ahead, Hous ... Aquarius.
112:32:59 Haise: Okay. Jack reports from upstairs that he can see stars and constellations out of the optics but the Sun angle is such that it is reflecting off the LM ... portion of the LM quad and other thruster [garble] right now. [Garble] really moving around [garble].
112:33:29 Lousma: Okay. The part I got was that he can see stars and constellations and there is some sunlight reflected off the quads. That's all I got.
112:33:41 Haise: Yes. The point being that, at least in the present orientation, you have to kind of wait until Sun isn't reflected off the LM to see them. [Long pause.]
112:33:59 Lousma: Okay. What you're saying is you kind of have to wait until the ... there is no Sun reflection on the LM to see the stars. Is that right?
112:34:08 Haise: Yes. That's for the present orientation, of course. [Long pause.]
112:34:25 Haise: But later on, if you can stop it moving around and [garble]. [Garble].
112:34:35 Lousma: Okay ...
112:34:36 Haise: [Garble]. [Pause.]
112:34:47 Lousma: Okay, Freddo. And we need a volts and amps reading. [Pause.]
112:34:56 Haise: Okay. And bring it back upstairs. [Long pause.]
112:35:36 Haise: Okay. The volts, 35.0; amps, 2.4.
112:35:39 Lousma: Okay. 35.0 and 2.4. Thanks, Fred.
112:38:39 Lousma: The weather prediction for your landing area is still good; 2000 scattered, high scattered; 4-foot seas, 15-knots wind. There's a hurricane 500 miles to the west, which doesn't pose a problem.
112:39:02 Haise: A hurricane or a typhoon?
112:41:24 Lousma: Belay my last. It's degraded to a tropical storm.
112:47:17 Lousma: Aquarius, Houston. We need another readout amps and volts, and that will be our last one for a half hour. Over.
112:48:33 Haise: Okay. The reading is 37.8 volts, 2.3 amps. [Pause.]
112:48:40 Lousma: Say again, Fred.
112:48:43 Haise: 37.8 volts, 2.3 amps.
112:48:49 Lousma: 37.8 and 2.3. And that will be our last one for a half hour. Thank you. And I'm about to exercise my fifth general order here, and pass it along to Joe. [Long pause.]
112:49:07 Haise: Yes. It must be getting around a mealtime.
This is Apollo Control at 112 hours, 50 minutes. We're in the process of a shift handover at the present time in Mission Control. Flight Director Glynn Lunney is replacing Flight Director Milton Windler. The capsule communicator on the upcoming shift will be astronaut Joe Kerwin. At the present time Apollo 13 is 131,712 nautical miles from Earth. The spacecraft velocity is up now to 4,928 feet per second.
Repeating a figure passed on a little while ago, the Flight Dynamics Officer reports that as a result of the midcourse correction, the flight path angle at entry is within the entry corridor. The flight path angle currently appears to be minus 6.24 degrees at Entry Interface. The nominal flight path angle is 6.5 and that is what the midcourse correction was targeted for 6.24, a negative 6.24 degrees is within the entry corridor and a descision has not been at this time as to whether any subsequent midcourse corrections will be required. At 112 hours, 51 minutes, this is Mission Control, Houston.
This is Apollo Control at 112 hours, 55 minutes. EECOM, the Command Module electrical and environmental control engineer reported that the power transfer to the Command Module main bus B is continuing to function smoothly and the battery charging operation also progressing well at this time. Battery A, one of three entry batteries aboard the Command Module, is being recharged, and EECOM reports that it appears to be taking a charge well. At 112 hours, 56 minutes, Apollo 13 is 131,426 nautical miles from Earth and travelling at a speed of 4,935 feet per second. We're now 29 hours, 44 minutes from reentry.
113:13:46 Kerwin: Aquarius, Houston. Over. [Pause.]
113:13:53 Haise: [Garble].
113:13:55 Kerwin: Okay. This is your friendly do-it-yourself kit Comm with a suggested procedure in the lithium hydroxide situation. You're looking good. We read 1.8 millimeters, and you do have sufficient LM [garble] to last you the rest of the flight. However, being on the conservative side, we would like to use one more set of Command Module canisters to guard against some possible problems with the LM, primary canister. And I have a simplified procedure for doing that, if you want to listen to it now. Over.
113:15:15 Kerwin: Okay. I think I read that you were ready. I forgot [garble] earphones. This simply consists of getting a second pair of cartridges out of the Command Module, putting one band of sticky tape, that is the gray tape, with the sticky side out, around the sides of each new canister near the top, taking a piece of EVA cue card and cutting it into four squares about 2 or 3 inches on a side, bending those at a right angle to form corner support, attaching them to the sticky tape, so that they'll stick up and overlap the old canister, and then simply putting the old canister next to the new canister and taping it up real good so it sticks together. The only other procedure is to remove the towel plug from the old cartridges and put it in the bottom of the new cartridge. And that's it. Over. [Pause.]
113:16:29 Haise: Okay. As I read you, we get the gray tape and fold it so that we get ... the back sticks around the outside of the canisters, then we mount to that four sides of our [garble] cards like our EVA [garble] cards; then we overlap those cards down around the base of the canister. Then we ... then we [garble] over the [garble] at the top. [Garble]. Then we take the towel from the old ones and put them in the bottom of the new ones. [Garble]. [Garble].
113:17:35 Kerwin: Okay, Fred. I think you got it. I didn't completely copy your readback, but it's just that simple. We're just putting the new cartridge ... the top of the new cartridge against the bottom of the old one, moving that towel plug, using the cue cards as little corner stiffeners, and taping her up.
113:17:59 Haise: Okay. The top of the new against the bottom of the old.
113:18:03 Kerwin: Roger that. That way you don't have to touch the hose.
113:20:08 Haise: Hey, for a change, I took the [garble] LM [garble] this morning, Joe.
113:20:16 Kerwin: Okay. Go ahead.
113:20:20 Haise: I got [Garble]. [Long pause.]
113:20:46 Kerwin: I'm afraid I didn't copy that, Fred, and while I was listening, EECOM told me that he'd like another battery charge [Garble] readout.
113:22:31 Haise: Houston, Aquarius.
113:22:34 Kerwin: Aquarius, Houston. Go.
113:22:38 Haise: You want us to start on this lithium right now, Joe, or is it necessary?
113:22:45 Kerwin: It's not time-critical, Fred, but if you have the people awake now, you might go ahead and do it. Incidentally, you probably know this, but the next several hours are going to be pretty quiet from our point of view. We're working on the entry procedures and should be ready to read them up to you in about 8 hours; and between now and then there's not an awful lot going to be going on, so you guys could be catching up on your sleep schedule. Over.
113:23:22 Haise: Okay, Joe.
113:23:24 Kerwin: And we would like another readout on the amps and volts. [Pause.]
113:24:53 Haise: Okay. The volts, Joe, are 38.9 and the amps are 1.9. [Pause.]
113:25:01 Kerwin: Okay. Copy that, Fred. Thank you very much; 38.9 and 1.9. And EECOM is simply making as smooth a plot as he can to verify the amount of amps we're putting back into the battery. That's why he wants it at half-hour intervals. If that schedule begins to interfere seriously with your rest cycle or so, give us a call. Over. [Pause.]
113:25:34 Haise: Okay. [Long pause.]
113:25:55 Haise: Yes. Jim's sleeping now, and Jack and I are awake and I just finished sleeping around, I guess, about another 5 or 6 hours, so I'm not particularly inclined to go back to sleep right now.
This is Apollo Control; 113 hours, 28 minutes Ground Elapsed Time. The Black Team of flight controllers is presently taking over here in the Mission Control Center. We're estimating about 15 minutes for the Change of Shift Press Briefing with Maroon Team Flight Director Milton Windler in the MSC main autorium. It appears that the shift will be primarily a sleep shift with a few minor items to be taken care of by the crew such as attaching additional lithium hydroxide canisters to the devices that were fabricated on board the spacecraft yesterday. Instead of taking the canisters out, they will simply attach another one in parallel with the canisters that are in the plastic bags attached to the suit hoses. Presently, Apollo 13 129,791 nautical miles out from Earth. Approaching at a velocity of 4,977 feet per second. At 113 hours, 30 minutes Ground Elapsed Time and standing by; this is Apollo Control.
113:38:29 Haise: Houston, Aquarius.
113:38:32 Kerwin: Aquarius, Houston. Go ahead.
113:38:37 Haise: Okay. We've got one of them ready to go, and it looks like we could do a pretty good job just using the tape strips. First combining them together and then just using a piece of paper and the bag [Garble] get a pretty good seal [garble].
113:38:54 Kerwin: Hey; okay, Fred. We suspected that you'd gotten at least one on. We've noticed a partial pressure drop from the 1.8 to 0.8, which is real good.
113:39:10 Haise: Okay. You might run that by the CPCB and see if they approve our in-house [garble]. [Pause.]
113:39:17 Kerwin: Roger that. [Long pause.]
113:39:35 Kerwin: Aquarius, Houston. [Long pause.]
113:40:22 Kerwin: Aquarius, Houston.
113:40:26 Haise: Go ahead, Joe.
113:40:28 Kerwin: Roger. We're convening the CPCB on that change, Fred, but Flight has given you an interim go ahead. Over. [Pause.]
This is Apollo Control. Participants in today's - this morning's change of shift press conference, Milton Windler, Maroon Team Flight Director, is now en route to the main auditorium, should be starting within the next few minutes and this is Apollo Control.
113:55:51 Haise: And, how do you read now?
113:55:55 Kerwin: Not too bad, Fred..
113:55:59 Haise: Okay. We've got both canisters completed now.
113:56:03 Kerwin: Okay. Roger that, Fred. And you're reading 0.1 again on the CO
2. Incidentally, are you guys having good luck getting water out of the Command Module?
113:56:17 Haise: We ... We haven't tried that yet today.
113:56:20 Kerwin: Okay. [Pause.]
113:56:27 Haise: Yes. This is quite an apparatus hanging on to these hoses now. And that ECS design engineer [garble] because it sure seems to work.
113:56:42 Kerwin: Roger that. [Long pause.]
113:57:27 Kerwin: And, Aquarius, Houston. At your convenience, we'd like another volts and amps readout.
113:59:08 Haise: How do you read, Joe?
113:59:11 Kerwin: Pretty good, Fred.
113:59:14 Haise: Okay. Volts, 39.0; amps, 1.7.
113:59:21 Kerwin: 39.0, 1.7. Thank you.
114:05:24 Kerwin: Aquarius, Houston. Go ahead. You're pretty weak.
114:05:30 Swigert: I didn't call you, Joe.
114:05:35 Kerwin: Say again.
114:05:39 Swigert: I didn't call.
114:05:41 Kerwin: Oh, sorry about that. Incidentally, Fred, if switching Omnis every couple of minutes bugs you, you can skip it for now. We can always wait until you come around.
114:05:54 Swigert: No, it doesn't. This is Jack, Joe. Fred [garble]. It doesn't bother me at all. [Pause.]
114:06:03 Swigert: Just happy to know that you're standing by.
114:06:06 Kerwin: Roger that. Except I'm sitting by. [Pause.]
114:06:19 Swigert: Did that CO
2 drop?
114:18:30 Swigert: Joe, how far out are we now and how fast are we closing?
114:18:35 Kerwin: Okay, Jack. The plot shows you about 130 000 miles out, which is about, gee, 10 000 closer than you were when I came on a couple of hours ago. And let me check with FIDO for your rate of closure. [Long pause.]
114:19:23 Kerwin: Hey, Jack. Over.
114:19:29 Swigert: Go ahead.
114:19:30 Kerwin: Your smiling FIDO says you're making 5040 in a 5000-mile zone.
114:19:39 Swigert: I can't [garble] I [garble].
114:29:41 Kerwin: Aquarius, Houston. Over.
114:29:46 Swigert: Go ahead, Joe.
114:29:48 Kerwin: Roger, Jack. Hate to keep bugging you, but we would like another volts and amps reading. Over.
114:29:56 Swigert: Okay. We'll get it for you.
114:29:58 Kerwin: Good show.
114:30:59 Swigert: Joe, did our sticky MOD on that ... those CO
2 canisters work? I'm sorry ... [garble].
114:31:07 Kerwin: Jack, I think you asked if the canister MOD was working and the answer is, it sure as hell is. [Long pause.]
114:31:49 Swigert: Okay, Joe. I got the voltage. It's 39.0 [volts] and 1.75 [amps]. [Pause.]
114:31:58 Kerwin: Copy 39.0 and 1.75.
This is Apollo Control; 114 hours, 46 minutes Ground Elapsed Time. Rather quiet at the present time, very little communications with the spacecraft, which now is 126,029 nautical miles out from Earth, approach velocity 5,076 feet per second. Electrical power usage hovering around 12, 13 amps, partial pressure carbon dioxide in the Lunar Module cabin 1/10th of a millimeter of mercury. The addition of the 2 Command Module lithium hydroxide scrubber canisters to the homemade device rigged up yesterday by the crew of Apollo 13 has reduced this quantity of carbon dioxide from slightly over 1 millimeter piped down to 1/10th. Apollo 13 total weight standing at 87,740 pounds [39,798 kg]. There goes a call I believe to the spacecraft.
Apparently it was an accidental nudge of the king switch at the capsule communicator's console causing the familiar beep beep sound. In some other spacecraft onboard readings, we're showing now 33.17 pounds [15.05 kg] of oxygen in the descent stage, 2.25 pounds [1.02 kg] is ascent tank 1, 2.67 pounds [1.21 kg] ascent tank 2. Water quantities: Descent, 51.9 pounds [23.5 kg]; ascent tank 1, 42.1 [19.1 kg]; ascent tank 2, 42.1 pounds [19.1 kg]; cabin pressure, 4.98 pounds per square inch, showing a temperature of 51 degrees [Fahrenheit, 10.6°C], which is - the measurement is taken at the outlet and does not represent the free air temperature in the cabin, which is probably up around 70[F, 21°C]. As mentioned earlier, Apollo 13 gross weight of both vehicles is now 87,740 pounds. Of this weight 58,728 pounds [26,639 kg] are rocket propellant, about 29 tons. This computes out to 67 percent of the total vehicle weight in propellants. Apollo 13 is the fifth time that a manned spacecraft has made the return from the Moon. Apollo 8 back in December of 68 was a somewhat conservative approach using the Command and Service Module only, and going into lunar orbit, having quite a large margin of propellant available to go into lunar orbit and to make Trans-Earth Injection out of lunar orbit back toward Earth. Apollo 10, the all-up spacecraft, went into lunar orbit, did everything but the actual landing, including the descent orbit down to about 8 [nautical] miles [13 km] above the Moon, stopped short of making the descent and here again there were adequate margins of propellant and with Apollo 11 the landing was made. And Apollo 12 was essentially a repeat as far as the amount of propellants and the spacecraft performance were concerned. At any rate, all of these had smaller amounts or smaller quantities of propellant available than Apollo 13 does at the present time. The Service Propulsion System propellant on Apollo 13 stand untapped at 40,796 pounds [18,505 kg]. This was for planned total Delta-V or velocity change of some 6,975 feet per second [2,126 m/s] with various vehicle combinations, not just Command/Service Module alone, but in some cases, such as Lunar Orbit Insertion and DOI where you have the total LM and Command Module combination, and others, the Trans-Earth Injection where only the Command and Service Module would use up some 3,147 feet per second [959 m/s]. There are 11,093 pounds [5,032 kg] of Descent Propulsion propellant remaining. However, not all of this is available since the supercritical helium burst disc relief valve blew during the night. There's about 800 feet per second [240 m/s] blowdown or ullage volume in the Descent Propulsion tanks so not all of this 11,000 pounds [5,000 kg] are available. In the untapped ascent propellant tanks, we have 5,242 pounds [2,378 kg] loaded. Service Module Reaction Control System, 1,342 pounds [609 kg] are still relatively untapped except for the small attitude usage that was made during the translunar coast prior to the time that the fuel cells gave up the ghost. In the Command Module Reaction Control System, this is still a sealed dual ring system in the Command Module for attitude control during entry. There are 245 pounds [111 kg] of propellant available there. When the Service Module and Lunar Module are jettisoned prior to entry approximately, 29 tons [26.6 metric tons] of what is jettisoned to enter the atmosphere and burn up will be propellant. The spaceflight meteorology group of the weather bureau said this morning that weather conditions would be acceptable for Apollo 13's landing in the Pacific Ocean, Friday, April 17, and the planned recovery area which is centered about 560 [nautical] miles [1,037 km] Southeast of Samoa, skies will be partly cloudly with widely scattered showers. Easterly winds at 15 knots and seas about 4 feet are expected with 75 degree [Fahrenheit, 24°C] temperature. Helen a small, weak, tropical storm is predicted to be about 500 miles west of the recovery area and should not affect the landing or recovery of Apollo 13. Conversation underway with Apollo 13, let's join in.
114:55:46 Swigert: Houston, do you read Aquarius?
114:55:51 Kerwin: Aquarius, Houston. That's affirmative.
114:55:55 Swigert: Okay. We had a dropout there for a few minutes. [Garble] on either antenna.
114:56:04 Kerwin: Gee whiz, Jack, I ... when did it happen? Over.
114:56:13 Swigert: Just now. I just got you back.
114:56:16 Kerwin: Okay. We had a handover, but that was about a half an hour ago, and I didn't call you on it. Let me check with INCO and see if he thinks everything's okay. Your Comm sounds just as good as it's ever been.
114:56:31 Swigert: Yes. I'm in real good shape. [Long pause.]
114:56:54 Kerwin: Jack, Houston. Over.
114:56:58 Swigert: Go ahead.
114:57:00 Kerwin: Roger. We're checking into it. We think we lost lock in Madrid for a while, and we've got it back now.
114:57:07 Swigert: Okay. Real fine. [Garble].
114:57:13 Swigert: You might also check with FIDO whether we [garble] perigee [garble]. [Pause.]
114:57:23 Kerwin: You're getting a little weak. Did you say you wanted to verify what ... what your vacuum perigee is? Over. [Pause.]
114:57:30 Swigert: Yes. [Garble].
114:58:35 Kerwin: Jack, Houston. Over.
114:58:39 Swigert: Go ahead.
114:58:41 Kerwin: Okay. The good FIDO gives us a vacuum perigee at the present time of 23.6 with a flight path angle of minus 6.25 degrees. That's without a midcourse. He's kind of tossing around the idea of doing a midcourse-7 maneuver at 5 hours before entry. If we do it, it looks like it won't be more than 2 feet per second. Over.
114:59:15 Swigert: Okay. [Long pause.]
114:59:50 Kerwin: And, Jack, Houston. We verified that that Comm problem was a ground problem. [Pause.]
114:59:59 Swigert: Okay. Thank you. That FIDO is really cooking today.
115:00:03 Kerwin: Oh, he's having a ball.
115:00:08 Swigert: It must be because we haven't made any waste water dumps.
115:00:11 Kerwin: (Laughter)
115:00:17 Swigert: You can tell Jay and David that I went for a whole flight and didn't use the bathroom. [Pause.]
115:00:24 Kerwin: (Laughter) He copies that. David's here; he says you've kept him so busy he hasn't had time to work on his stereo all week.
It does not come as a surprise that the astronauts were concerned about their bowel habits, considering the onboard facilities consisted of a plastic bag taped into place for use. The messy and unpleasant procedure would take at least 45 minutes.
115:07:54 Kerwin: Aquarius, Houston. Over.
115:07:59 Swigert: Go ahead.
115:08:01 Kerwin: Jack, we'd like another volts and amps reading at your convenience.
115:09:25 Swigert: Okay, Houston. It's 39.2 volts; 1.6 amps.
115:09:34 Kerwin: Okay. Thank you. We copy; 39.2 volts, and 1.6 amps.
115:09:42 Swigert: Right.
This is Apollo Control; 115 hours, 14 minutes Ground Elapsed Time. Some of the other clocks in the mission control operations room here showing time to entry, 27 hours, 25 minutes, time to ignition on midcourse correction number 7, I suppose, 9 hours, 56 minutes, this would be if done, it would be about 2 feet per second to lower the vacuum perigee from its present 23.6 miles to around 20 nautical miles. Apollo 13 now 124,626 miles out from Earth, approaching at 5,114 feet per second. Predicted velocity at 400 000 feet, or entry innerface, 36,210 feet per second; velocity would build up at the time of perigee of 23 miles to 36,431 feet per second. The prime recovery vessel Iwo Jima is steaming toward the aiming point in the Southcentral Pacific and its estimated arrival time at the aiming point is at 9 AM Central Time on the 17th. Partial pressure of carbon dioxide still holding at 1/10th of a millimeter of mercury in the Lunar Module cabin; cabin pressure 4.98 pounds. Holding steady. At 115 hours, 16 minutes - 115 hours, 17 minutes Ground Elapsed Time and standing by; this is Apollo Control.
This is Apollo Control; 115 hours, 28 minutes Ground Elapsed Time. To correct an earlier error regarding mid-course correction burn number 7, the clock at that time was showing 9 hours to ignition. Now it's showing the correct value of 22 hours, 11 minutes which is Entry Interface minus 5 hours. At 115 hours, 29 minutes; this is Apollo Control, standing by.
115:38:41 Lovell: Houston, Aquarius.
115:38:46 Kerwin: Aquarius, Houston. Go.
115:38:50 Lovell: I just relieved the watch; just thought I'd find out how things are going.
115:38:56 Kerwin: Okay, Jim. Good morning; and understand you relieved the watch, and the rest was kind of blurry. Did you have any questions?
115:39:09 Lovell: No questions, Joe. Just one of those [garble] communications.
115:39:10 Kerwin: Okay. That was ... That was loud and clear, that one there. Now we don't have a heck of a lot going on as you know we're working on the entry procedures. I've got preliminary copies, but we're not ready to pass ... to pass it up to you. Looks like you're about 125,000 miles out, starting to ... starting to really pick up speed, and the Astros won last night, and that's about all I've got. Over.
115:42:21 Kerwin: Aquarius, Houston. Over.
115:42:26 Lovell: Go ahead.
115:42:29 Kerwin: Okay, Jim. It's about time, at your convenience, for another volts and amps reading on the Command Module. For your information, we put 6 amp-hours back in the battery already and we've got about 14 to go. It's looking real good, and I also just got the word that the entry weather tomorrow is looking better all the time. Really looks great.
115:42:55 Lovell: That's good. When I went to bed last night, [garble] a lot of rain [garble]. [Pause.]
115:43:04 Kerwin: Didn't copy that, Jim. Sorry.
115:44:11 Lovell: Houston, Aquarius.
115:44:14 Kerwin: Aquarius, Houston. Go ahead.
115:44:17 Lovell: Roger. 39.2 on the volts; 1.4 on the amps.
115:44:23 Kerwin: 39.2 and 1.4. Thank you. [Long pause.]
115:44:54 Kerwin: Aquarius, Houston.
115:45:00 Lovell: Go ahead, Joe.
115:45:01 Kerwin: Roger. Just for your information, in case it happened when you were off watch, the master caution circuit breaker is still pulled, and we're seeing the ... the malfunction indication on the descent battery now, but all the parameters still look just as good as ever, and that's just for information.
115:45:28 Lovell: Okay. I see the battery light flickering now.
115:45:33 Kerwin: Okay. Recommend you ignore it.
116:26:40 Kerwin: Aquarius, Houston. Over.
116:26:44 Lovell: Go ahead, Houston.
116:26:46 Kerwin: Jim, it's volts and amps time again, at your convenience.
116:28:31 Lovell: Houston, Aquarius.
116:28:35 Kerwin: Go ahead, Aquarius. [Long pause.]
116:29:27 Kerwin: Aquarius, Houston. If you gave me those readings, I didn't copy them. Over. [Long pause.]
116:29:51 Lovell: Houston, Aquarius. Do you read?
116:29:53 Kerwin: Aquarius, Houston. Okay; go ahead.
116:29:58 Lovell: Volts, 39.3; amps, 1.25. [Pause.]
116:30:06 Kerwin: Okay. Copied 39.3 and 1.25. Jim, did Jack tell you what your trajectory looks like? Over. [Pause.]
116:30:18 Lovell: Haven't got up to [garble] on it. How about giving me a rundown?
116:30:21 Kerwin: Okay. We are looking at a vacuum perigee right now of 23.6; flight path angle of minus 6.25; and if we decide we want to trim that up, we're looking at a midcourse of about 2 feet per second. Your consumables, of course, are getting better all the time; we've got 163 hours of water, 230 hours of oxygen, and 172 hours worth of electrical power. Over.
116:30:55 Lovell: That sounds good.
This is Apollo Control; 116 hours, 35 minutes Ground Elapsed Time. The spacecraft position now 120,598 nautical miles out from Earth, approach velocity 5,227 feet per second, countdown clocks now showing 26 hours 4 minutes to Entry Interface or 400,000 feet above the surface of the Earth. Time to ignition or mid-course correction burn number 7 now tentatively 21 hours 4 minutes. This is Entry Interface minus 5 hours. Cabin pressure still holding at 4.78 in the Lunar Module, average voltage or amperage usage still hovering around 12, 13, 14 amps in the Lunar Module, vehicle weight still 87,740 pounds. At 116 hours, 37 minutes Ground Elapsed Time; this is Apollo Control.
This is Apollo Control. An advisory to newsmen in the Houston News Center. Donald K. (Deke) Slayton, Flight Crew Operations Director at Manned Spacecraft Center is now enroute to the main auditorium for the 10:00 briefing. Should arrive there within about 5 minutes. This is Apollo Control.
Deke Slayton filmed at the news conference. The journalists got to face a somewhat cranky, cigarillo-smoking Director Slayton who dodged their questions and kept saying that everything was proceeding according to the plan.
117:00:36 Kerwin: Aquarius, Houston. Over.
117:00:40 Lovell: Go ahead, Houston.
117:00:42 Kerwin: Okay, Jim. We would like to get another check from you on the propellant tank temperatures, as we did yesterday. And the procedure is to, on panel 16, circuit breaker Propellant, Display/Engine, Override/Logic to close. Then go to your display and read the tank 1 and tank 2 temperatures for us, and then open the circuit breaker again. Over.
117:01:14 Lovell: Okay. I'm closing now ... the Display/Engine, Override/Logic.
117:01:18 Kerwin: Roger. [Pause.]
117:01:26 Lovell: Okay. And the reaction control temperatures are 65 in A and 65 in B.
117:01:34 Kerwin: Okay, Jim. We'd like the descent tank temperatures, too. Over. [Long pause.]
117:01:59 Lovell: 67; oxidizer is 63; descent tank 1 [garble] is 64; the oxidizer is [garble] Did you copy? Over. [Long pause.]
117:02:22 Lovell: Hello, Houston. Did you copy the ... the DPS display temperatures?
117:02:27 Kerwin: Jim, I copied 63 and 64, which I think were the descent 1 temps, and that's all I got.
117:02:37 Lovell: Okay. I'll go over it again. I'm on descent 1, now and fuel is about 64, and oxidizer is 65, and I'll go to descent 2 ...
117:02:47 Kerwin: Okay. Thank you very much ...
117:02:48 Lovell: ... our descent 2. Okay. I've got descent 2 now right up on 67 and 66.
117:02:55 Kerwin: Roger. We copy that, and once again we'd like to get the volts and amps check in the Command Module. Over.
117:03:07 Lovell: Okay. I'm going to go up there and get it. Jack is ... and Fred are asleep, so I'll be off the air a minute.
117:03:12 Kerwin: Okay. Real good.
117:05:31 Lovell: Houston, Aquarius.
117:05:33 Kerwin: Aquarius, Houston. Go.
117:05:37 Lovell: Volts, 39.3; amps, 1.2 zip.
117:05:45 Kerwin: Okay. We copy 39.3 and 1.20. And, Jim, I've got one more item for information for you. At ... In about 45 minutes or so, you will get an H
2O quantity caution light on the descent tank. We expect this. It occurs at 16 percent. And it's no problem, because we intend to run the tank dry just for drill. To reset the ... the light, on panel 2, just set the O
2 H
2O Quantity Monitor to the Caution/Warning Reset position and the light will go away. Over.
117:06:26 Lovell: Okay. I understand. We're going to get a H
2O warning light here shortly, and I'll reset it. [Pause.]
117:06:35 Kerwin: Okay. Good deal.
This is Apollo Control; 117 hours, 30 minutes Ground Elapsed Time. Apollo 13 now 117,810 nautical miles out from Earth. Approach velocity 5,308 feet per second. Entry flight path angle still holding at minus 6.24 degrees. Countdown clocks: entry 25 hours and 9 minutes from now; ignition on the proposed midcourse correction burn number 7 now 20 hours and 9 minutes away. Lunar Module cabin temperature [means pressure] hovering around 4.74, 4.78 pounds per square inch. Flight plan now showing rest period forthe Command Module pilot to begin at 116 hours, about an hour and a half ago. At 3 PM in the main auditorium at the Manned Spacecraft Center, Neil Armstrong, commander of Apollo 11 will hold a press conference to discuss the various aspects of Apollo 13. And at 117 hours, 32 minutes Ground Elapsed Time; this is Apollo Control.
117:34:07 Lovell: Houston, Apollo 13.
117:34:12 Kerwin: Aquarius, Houston; go ahead.
117:34:16 Lovell: Okay, Joe, we got the Water warning light.
117:34:20 Kerwin: Okay. Roger that.
117:46:57 Kerwin: Aquarius, Houston. Over.
117:47:02 Lovell: Go ahead, Houston.
117:47:04 Kerwin: Okay, Jim. The experts would like another volt and amp reading. [Pause.]
117:47:11 Lovell: Okay; have them stand by.
117:47:13 Kerwin: Okay, no rush.
117:49:46 Lovell: Houston, Aquarius.
117:49:49 Kerwin: Aquarius, Houston; go ahead.
117:49:53 Lovell: Voltage is 39.3; amps, 1.26. [Pause.]
117:50:00 Kerwin: Copy 39.3 and 1.26.
This is Apollo Control; 117 hours, 51 minutes Ground Elapsed Time. Distance from Earth, 116,748 nautical miles.
117:51:17 Lovell: Houston, Aquarius.
117:51:19 Kerwin: Aquarius, Houston; go.
117:51:24 Lovell: Joe, you might pass to our friends in Crew Systems that lunar boots make great footwarmers.
Diagram of the lunar overshoe. They are mostly made of Beta cloth with multiple layers of Mylar and Kapton for micrometeroid and thermal insulation. They were designed to be slipped over the space suit boots to protect them from abrasion and thermal differences while on the lunar surface.
117:51:31 Kerwin: I guess you need them up there, too. Is ... is anybody sleeping in the Command Module right now, Jim?
117:51:39 Lovell: Negative, Joe. It's just too cold in there. I got Fred stashed over here to my left. He's asleep and Jack's [garble]. [Pause.]
117:51:46 Kerwin: Roger. [Long pause.]
This film shows Fred sleeping strapped to the commander's station in the LM. This view has made its way into many Apollo 13 documentaries and books. 16mm film capture. JSC
Jim Lovell at the LMP's station. 16mm film capture. JSC
Jack Swigert sleeping between the ascent engine and the tunnel. 16mm film capture. JSC
117:52:22 Lovell: You can eliminate the chilldown procedure for reentry.
117:52:27 Kerwin: (Laughter) Well, we figured we were in that mode now.
Velocity now 5,342 feet per second. Henry H. Wilson, Jr., President of the Chicago Board of Trade has forwarded the following message to the Mission Control Center: "The Chicago Board of Trade will suspend trading at 11 A.M. today for a moment of tribute to the courage and gallantry of America's Astronauts and a prayer for their safe return to Earth." At 117 hours, 53 minutes Ground Elapsed Time and standing by; this is Apollo Control.
This is Apollo Control; 118 hours, 8 minutes Ground Elapsed Time. At the present time in the Houston News Center main auditorium, is a briefing just beginning with Mr. Keith McClung of North American Rockwell who will discuss the various hardware aspects of the Friday morning entry of Apollo 13. This is Apollo Control, standing by.
118:25:50 Kerwin: Aquarius, this is Earth. Over.
118:25:55 Lovell: Go ahead, Earth; Aquarius here.
118:25:57 Kerwin: Roger. Earth is here, also; and, Jim, it is time for another one of those volt/amp checks. For your information, we've got that battery back up to 30 amp-hours now. Over.
118:26:10 Lovell: Hey, that sounds great. Jack's gone up to check it.
118:26:17 Kerwin: Roger. [Long pause.]
118:26:34 Lovell: Aquarius, Earth.
118:26:37 Kerwin: Go ahead.
118:26:41 Lovell: You know, I think Aquarius is [garble].
118:26:49 Kerwin: We've got [garble] now, Jim; I'm sorry.
118:26:55 Lovell: I said Aquarius [garble].
118:26:57 Kerwin: Roger. [Long pause.]
118:27:25 Lovell: Houston, Aquarius.
118:27:27 Kerwin: Go ahead.
118:27:30 Lovell: Voltage 39.3, amps 1.26.
118:27:36 Kerwin: Okay. Copy that, Jim. [Long pause.]
118:27:56 Kerwin: Jim, Houston. Have you guys put on any extra clothes to try and ward off the nip of Jack Frost? Over.
118:28:06 Lovell: Well, the lunar boots and two pair of underwear, and everyone is [garble] crawl into their sleep restraints. [Pause.]
118:28:15 Lovell: We're a little reluctant to break out the suits.
118:28:18 Kerwin: Yes, that's understandable. You can always use them if you have to. I guess it's pretty hard to get extra coveralls on, huh? [Long pause.]
118:28:44 Lovell: Well, Joe, I didn't think we had any extra inflight garments aboard, but we're going to check right now.
118:28:50 Kerwin: Well, stand by.
118:43:33 Kerwin: Aquarius, Houston.
118:43:36 Lovell: Go ahead, Houston.
118:43:38 Kerwin: Roger. Jim, we noticed you just went to Auto and back to Close on the Suit Relief valve. Is everything okay?
118:43:48 Lovell: We didn't do that intentionally. Stand by.
118:43:54 Kerwin: Okay, maybe you didn't. Incidentally, you're less than 24 hours to go.
118:44:00 Lovell: Roger. What happened was, our lithium hydroxide device here got caught in the suit relief valve. It is closed now. That's where you want it, right? [Pause.]
118:44:12 Kerwin: Okay. [Long pause.]
118:44:30 Kerwin: Okay. [Long pause.]
118:44:45 Lovell: And, Joe, just a reminder; now that you mention it ... that it's less than 24 hours to go, what I'd like to do, and I have aboard all the procedures that you are working up; so I can run through them with the crew, and make sure that we get all our signals straight.
118:45:05 Kerwin: Roger that, Jim. We are trying to get the procedures finished and up to you as quickly as we can. They exist. What's going on now is the guys are running them in the CMS/LMS, integrate, to make darn sure that the attitudes are correct and the time line is nice and relaxed and all that good stuff. And they won't be finished that run for another few hours. However, we expect to have an overall time line and a sequence of events for you before that time, and we'll start with the procedures as soon as they get ready. Over.
118:45:50 Lovell: Okay. That's good. I think [garble] ought to go back to the original procedures we have on board and modify them as we have the time to. [Long pause.]
118:46:18 Kerwin: Okay, Jim. Roger. We're going to do that to the maximum extent possible. And it looks reasonably feasible. To begin with in the Command Module we're going to have to send you some separate sequences for powering it up a little bit at a time. The closer we get to entry the more we get on the checklist. By the time we're about at EI minus 45 we're on the checklist all the way.
118:46:39 Lovell: Okay. [Pause.]
118:46:49 Lovell: And just as a reminder, don't forget our stowage problem. We ... We still have to do quite a bit of stowage of the drogue and probe in the LM, and, et cetera.
118:46:59 Kerwin: Roger that. We've got a team working on that, and incidentally, one of the information items that they want to know is which lithium hydroxide containers in the Command Module are empty. They just want to know that for weight and balance ... and there's no rush about it ...
118:47:18 Lovell: [Garble].
118:56:43 Lovell: Aquarius, Houston.
118:56:46 Kerwin: Go ahead, Aquarius.
118:56:50 Lovell: Another note of interest to the crew systems people ... Tell them that they don't have to bother putting the refrigerator onboard. I just brought out some hot dogs, and they're practically frozen.
118:57:05 Kerwin: (Laughter) Okay. We copy that, Jim.
119:11:05 Kerwin: Aquarius, Houston.
119:11:10 Lovell: Go ahead.
119:11:11 Kerwin: Okay. We'd like another volt, amp reading, Jim.
119:11:16 Lovell: Okay. Stand by, Joe.
119:12:40 Lovell: Houston, Aquarius.
119:12:41 Kerwin: Go ahead, Jim.
119:12:44 Lovell: Volt 39.4, amp 1.23.
119:12:49 Kerwin: Okay. Roger that. And, Jim, we ought to have a ... an entry time line to discuss with you in one hour.
This is Apollo Control; 119 hours, 17 minutes Ground Elapsed Time. Spacecraft position, 112,224 nautical miles out from Earth. Velocity continuing to build up. Now 5,478 feet per second. Looking now at Entry Interface time of 142 hours, 40 minutes, 42 seconds which according to the countdown clock is some 23 hours, 22 minutes from now. Got a midcourse correction burn something less than 2 feet per second which may or may not be done some 18 hours, 22 minutes from now, which is entry minus 5 hours. Cabin pressure aboard Aquarius holding around 4.7 pounds. Communication still rather scratchy, from time to time, spacecraft communicator Joe Kerwin requests the crew to give amp, pressure and voltage readouts on the battery charge going on and has been underway since about 112 hours. At 119 hours, 19 minutes Ground Elapsed Time; this is Apollo Control.
This is Apollo Control; 119 hours, 44 minutes Ground Elapsed Time. 22 hours, 56 minutes to Entry Interface, 400,000 feet. 17 hours, 56 minutes to next midcourse correction, if it is indeed performed. Cabin pressure in the Lunar Module holding at 4.94 pounds per square inch. Partial pressure of carbon dioxide in the cabin, 1/10 of a millimeter of mercury. And in the consumables for the Lunar Module, the remaining lifetime of various consumables; total usable remaining water, 111.4 pounds. The present usage rate is 2½ pounds an hour and the time remaining at this present rate, 163 hours Ground Elapsed Time when the water would be defunct. Oxygen aboard, 33.43 pounds, using 0.26 pounds per hour. This oxygen would run out at 247 hours. Electrical power total usable remaining, amp-hours, 974, using about 17.9 amp-hours or amps at the present time. This would be exhausted at 173 hours Ground Elapsed Time. Lithium hydroxide cartridges total remaining 180 hours. This is for the Lunar Module standard consumables, does not include the life time on the portable life support systems. At 119 hours, 46 minutes Ground Elapsed Time and standing by; this is Apollo Control.