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Conrad, from the 1969 Technical Debrief -
"As soon as I got the vehicle stopped in horizontal velocity at 300 feet (figure 4-12 from the Apollo 12 Mission Report indicates that he stopped almost all of his forward motion at about 220 feet), we picked up a tremendous amount of dust - much more than I had expected. It looked a lot worse than it did in the movies I saw of Neil's landing. It seemed to me that we got the dust much higher than Neil indicated. It could be because we were in a hover, higher up, coming down. I don't know. But we had dust from - I think I called it around 300 feet. I could see the boulders through the dust, but the dust went as far as I could see in any direction and completely obliterated craters and anything else. All I knew was (that) there was ground underneath that dust. I had no problem with the dust, determining horizontal (fore and aft) and lateral (left and right) velocities, but I couldn't tell what was underneath me. I knew I was in a generally good area and I was just going to have to bite the bullet and land, because I couldn't tell whether there was a crater down there or not."