Better than that, I am friends with a young man, now in his 30's, who for many years was the chief waterfront director at an Adirondack Boy Scout resident camp. He had lost his left arm above the elbow in an accident years earlier. He did not have or use, or need a prosthetic arm. Not only could he swim, regularly doing the mile swim several times each season, he could effectively paddle a canoe and teach canoeing with ease and go tripping/backpacking with canoe. The camp had a Hobie Cat sailboat as well as several small sunfish sailboats. He could sail them all by himself solo. He loved the Hobie and ended up with that as his personal boat when the camp folded and sold it to him. One test for lifeguard certification was a heavy steel sledge hammer he had welded to a steel pipe handle that he would throw into deep water off the floating dock. Lifeguard candidates had to dive in, retrieve it, and carry it on the surface to shore, as well as doing a live simulated "thrashing panicked victim" rescue. No one could do any of these better than Rick, a most amazing young man.