The term "flair reserve" would be what I would use to make a gentle touchdown as Sully did. Airliners are not designed to land in rivers so obviously the aft fuselage had damage but was minor. He did a great job and whoever said he hit the Hudson at over 700 FPM was wrong. We would all try to touch down with a negligable descent rate and it was obvious he did. We all know we would have to maintain over 700 FPM to do what he did to have the energy to flair and stop the descent. Why couldn't the NTSB? If I wasn't so old I would like to work for them but the fun stuff is probably done by the senior guys. I would be pulling up their last physical dates.