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This is Volume 1 of NASA's Apollo 11 Technical Crew Debriefing, dated July 31, 1969. The Mission Operations Branch of the Flight Crew Support Division at the Manned Spacecraft Center in Houston prepared it, and it was originally classified Confidential. In it Armstrong, Aldrin and Collins go phase by phase through suiting, launch, powered flight, Earth orbit and lunar surface activities. They comment on suit fit, vibration, checklists, lunar dust, footing and poor sleeping conditions in the lunar module. A section titled Visual Sightings appears in the table of contents.
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# CONFIDENTIAL the ground for the zenith passage. So I was fully expecting it to acquire again. I don't think we had our AGS configured and the ground was not as helpful as they might have been had we run this sort of thing previously in simulations and had a bit more training on it. We started to do the P57 and realized that this would be too soon before lift-off. It seems to me we had a time period in which we were essentially standing by. We did an abbreviated RCS check. Because one of them was a coldfire check, we got all the red flags coming on. We did an AGS calibration, got the ascent pad; then, at about 45 or 50 minutes before lift-off, we called up the P57 again. We did a landing site option at the TIG of lift-off. The torquing angles between this alignment and the previous one were on the order of 0.09 degree maximum. The gravity alignment had an initial error of 0.00001 and on recycle had the same thing. I don't have logged down what the star-angle difference was, but it was - probably on the order of 7 to 9, somewhere in there. It wasn't anything that made me jump up and down. But again it was measuring the difference between gravity and a star and, of course, doesn't really indicate how well you know the star position ## CONFIDENTIAL
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