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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 ## 10.8 HORIZON, SIGHTING, APPEARANCE The things that seem worthy of comment here are observations from the window prior to lunar surface work. We were in a relatively smooth area covered with craters varying from up to perhaps 100 feet in the near vicinity down to less than a foot, with density inversely proportional to the size of the crater. The smaller they were, the more there were of them. The ground mass was very fine silt, and there were a lot of rocks of all sizes, angularities, and types in the area. Our immediate area was relatively free of large rocks. Several hundred feet to our right there was a significant boulder field, an array of boulders, essentially, that had many boulders greater than 1 or 2 feet in size. We never were able to get into that area to look at those rocks in detail. Distances are deceiving. When we looked at this fairly large boulder field off to the right, it didn't look very far away at all before we went out. Of course, once we got out, we wandered as far as seemed appropriate. Of course, we never came close to this particular field. What really impressed me was the difference in distances. After we were back in again looking out at the flag, the ## CONFIDENTIAL
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