Sam was an important contributor to the article we wrote on teaching scuba while neutrally buoyant rather than on the knees. His contribution, as people might guess, focused on how scuba was taught from the beginning. In our research, we wanted to know when classes started to be taught on the knees, and Sam showed that students were on the knees or on their butts from the very beginning because there was no way to get neutrally buoyant then--not even wetsuits. That was one of the points of the original draft of the article--teaching on the knees was an unneeded relic of a time when teaching while neutral was not possible.
None of that made it into the published article because of the length of the article. It was still important because we had to get PADI to agree to publish it first, and I believe Sam's portion of the original draft was very much instrumental in achieving that goal.
