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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 that did to our possible touchdown point. It seemed to me, when we finished that, we were just about on schedule, maybe a little bit behind so we proceeded into the option 3 which was gravity plus one star; because Rigel had been so good, I used that one again. The gravity alignment seemed to be quite consistent. The first time we did the gravity alignment on option 3, it came up with 00000, our star-angle difference on the gravity plus one star, which indicates an error in that gravity measurement and star measurement was 00008. I know we had the torquing angle recorded on that also. The azimuth is very large — 0.2 degrees. We received a GO for T-3. In the vicinity of loading times for a T-2 abort, I noticed that the mission timer wasn't working. It was frozen; it just stopped. ARMSTRONG No, it didn't just stop. ALDRIN Yes, it had gone to 900 hours. ## ARMSTRONG 900 and some hours. I couldn't correlate the minutes and the seconds with any particular previous event. ALDRIN Yes. 903:34:47. I don't know what time that relates to. Obviously, the 9 digit changed. It might have stopped, ## CONFIDENTIAL
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