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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 3.11 CABIN PRESSURE (DECREASE) COLLINS The valves worked as advertised and started decreasing as scheduled. ARMSTRONG You can hear those valves relieving, I think, from all three crew stations. ALDRIN While they were relieving, you couldn't hear too much else. COLLINS I didn't think it was that bad. 3.15 EMERGENCY DETECTION SYSTEM ARMSTRONG No problems. 3.16 VEHICLE RESPONSE TO GIMBALING ARMSTRONG The outboard engine gimbaling was not really noticed. 3.17 NOISE LEVEL VARIATION ALDRIN We were anticipating that, but it was just a motion as I recall. There were several little jolts to your relaxing of the four g's. That's how I recall it. COLLINS I would say that we were well briefed on that. I mean there weren't really any surprises. 3.22 DISTINCTION OF SOUNDS AND SENSATIONS ARMSTRONG There were sounds and sensations during the staging. # CONFIDENTIAL
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