James Lovell Jack Swigert JFred Haise Jack Lousma Apollo 13, Houston. The next thing we'd like you to do is to - - Go ahead. - - we'd like you to roll right to 060 and null your rates for photography of the Comet Bennett. To do that, we would like you to enable quads C and D. For the maneuver, use all your quads. And in precisely 1 minute, we'd like you to terminate the battery charge on battery B. One other request, we'd like to have you verify - - Okay. Will do. One other request, we'd like you to verify your high gain configuration. We'd like to know what track mode, what SERVO, and what beam width. Okay, Jack, during the TV, we were AUTO TRACK, NARROW BEAM WIDTH, and the PRIMARY ELECTRONICS. And we had a good lockup. Just after we started the maneuver, I was able to lock you up and get real good signal strength, and it just seemed that right there at about 239 degrees in yaw, that the signal strength would just drop off and yaw would go to zero and pitch would go to 90. Roger. We copy, and the TV show was great. Okay, real fine. Okay, I'm going to maneuver to 060, 090, and 0. And, 13, we'd like you to check C-4 thruster. Okay, Jack. The battery charge has been terminated on the battery B. Roger. We see it, Jack. And we got a reading of minus 2 degrees on the docking index. We'd like to know it that's 2.0 precise or if it's 2.1 or 1.9. No. It's a minus 2.0 precisely. Thank you. 13, we've got one more item for you, when you get a chance. We'd like you to stir up your cryo tanks. In addition, I have shaft and trunnion - - Okay. - - for looking at the Comet Bennett, if you need it. Okay. Stand by. Okay, Houston - - I believe we've had a problem here. This is Houston. Say again, please. Houston, we've had a problem. We've had a MAIN B BUS UNDERVOLT. Roger. MAIN B UNDERVOLT. Okay, stand by, 13. We're looking at it. Okay. Right now, Houston, the voltage is - is looking good. And we had a pretty large bang associated with the CAUTION AND WARNING there. And as I recall, MAIN B was the one that had had an amp spike on it once before. Roger, Fred. In the interim here, we're starting to go ahead and button up the tunnel again. Roger. Yes. That jolt must have rocked the sensor on - see now - 0^ QUANTITY 2. It - was oscillating down around 20 to 6O percent. Now it's full- scale high again. Roger. And, Houston, we had a RESTART on our computer and we had a PGNCS light and the RESTART RESET. Roger. RESTART and a PGNCS light. RESET on a PGNCS, RESET - - Okay. And we're looking at our S - SERVICE MODULE RCS HELIUM 1. We have - B is barber poled and D is barber poled, HELIUM 2, D is barber pole, and SECONDARY PROPELLANTS, I have A and C barber pole. BMAG temperatures? Okay, AC 2 is showing zip. I'm going to try to reconfigure on that, Jack. Roger. Yes. We got a MAIN BUS A UNDERVOLT now, too, showing. MAIN A UNDERVOLT.