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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 ## 3.13 MACH 1 AND MAX g NOISE LEVELS ARMSTRONG Well, I think I was surprised at how little these were apparent to me, and particularly Alpha. Alpha never came off zero throughout the launch, and I wondered if they were operating. 3.14 CONTROL RESPONSE IN HIGH g REGION ARMSTRONG It was as smooth as glass going through the high g region. ALDRIN What causes it, we don't really know, but it could be the vehicle length away from the ground; characteristic length, or whatever you call it. ## 3.6 LAUNCH VEHICLE LIGHTS ARMSTRONG Launch vehicle lights, roll program, pitch program, roll complete were on time, as were the rate changes. My impression in the seat throughout this phase, as well as the subsequent first stage, was that of going over rough railroad tracks in a train in which vibrations occur in all three axes. COLLINS That was a rougher ride than I expected. ARMSTRONG There were sharp bumps in each of the three axes periodically. COLLINS Yes, that's right, and the gain of the system was pretty high, also. ## CONFIDENTIAL
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