As a former master instructor and chief of training at the U.S. Navy Survival, Evasion, Resistance and Escape School (SERE) in San Diego, I know the waterboard personally and intimately. Our staff was required to undergo the waterboard at its fullest. I was no exception.
When I started this post, I had been unaware that Morrissey had critically reviewed Nance's testimony. Part of my motivation for treating this issue was Morrissey's initial acceptance of that testimony. The subsequent declassification of various memos has helped to clarify Nance's role; though he is ideologically committed in opposition to waterboarding based on his acceptance that it is torture, his testimony was probably offered in good faith in spite of any exaggerations. At least some of that exaggeration probably occurred simply because Nance was not precisely familiar with limitations the CIA set on its practice of waterboarding.
My post is simply an effort to help set that part of the record straight.