Solo diving II. In the late 1940s, after the invention of the Aqua-lung by Cousteau and Gagnan, the first retail underwater breathing apparatus for sport was commercially marketed. As the sport expanded through the 1950s, several sporting organisations – notably the Young Men's Christian Association (YMCA) – began scuba training programmes for swimming enthusiasts, thus began the codification of what was believed to be proper practices for the expanding amateur sport of scuba diving. The buddy system was thought to be a useful corollary to the "never swim alone" edicts of the YMCA swimming and lifesaving programmes. Cousteau independently implemented a buddy
Fabien Cousteau Fabien Cousteau Fabien Cousteau (born 2 October 1967) is an aquanaut, ocean conservationist, and documentary filmmaker. As the first grandson of Jacques-Yves Cousteau, Fabien spent his early years aboard his grandfather’s ships Calypso and Alcyone; learning how to scuba dive on his fourth birthday. From 2000–2002, Fabien was an Explorer-at-Large for National Geographic and collaborated on a TV special aimed at changing public conceptions about sharks called "Attack of the Mystery Shark". Then in 2003–2006, he produced the documentary "" that aired on CBS. With the help of a large crew, Fabien created a 14-foot, 1,200-pound, lifelike shark submarine called