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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.
“Low Earth orbit”2 pages
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## CONFIDENTIAL ARMSTRONG There was one observation here that seemed to me to be different from the simulator. In the spacecraft, I could seldom if ever detect a difference in signal strength between MEDIUM and NARROW. In the simulator, it's always decidedly different. The conclusion to be reached is that either the simulator is not an accurate representation of signal strength or that we really weren't getting any difference between MEDIUM and NARROW beam. We were, in fact, stuck in one or the other irrespective of switching. ALDRIN I would expect there wasn't as much difference between WIDE and MEDIUM, but when you went to the NARROW, you could see it. It wasn't consistent. In any case, it was unlike what we were used to and as long as the signal was received, I guess it's not a problem. COLLINS I think that's a function of distance, too. Now in lunar orbit, there was a noticeable difference between MEDIUM and NARROW. But there were some funnies in that high gain antenna. We were playing with it some time and we didn't have control over it and the ground had one of the OMNI's selected. We thought we were controlling it and we ## CONFIDENTIAL
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