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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.
## CONFIDENTIAL ALDRIN (CONT'D) begin the P52 and we were about 2 minutes behind when we completed looking at the radar and VHF ranging and designated the radar down so that we could do the P52. ARMSTRONG I don't think we had any difficulties with the DOI prep. 9.2.2 DPS/DOI burn ARMSTRONG At DOI ignition, which was our first DPS maneuver, I could not hear the engine ignite. I could not feel it ignite, and the only way that I was sure that it had ignited was by looking at chamber pressure and accelerometer. Very low acceleration -- COLLINS I would think under zero g, it would throw you against your straps, one way or the other. ARMSTRONG We're pulled down into the floor with the restraint, and the difference between that and the 10-percent throttle acceleration was not detectable to me. However, at 15 seconds, when we went to 40 percent, it definitely was detectable. ALDRIN On the restraints, I found that instead of being pulled straight down, the general tendency was to be pulled forward and outboard. So much so that this might have been a suit problem, as my right foot around the instep was taking a good bit of this load, being pulled down to the CONFIDENTIAL ## CONFIDENTIAL
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