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
Jacques Cousteau to the Académie française, chair 17, succeeding Jean Delay. His official reception under the cupola took place on 22 June 1989, the response to his speech of reception being given by Bertrand Poirot-Delpech. After his death, he was replaced by Érik Orsenna on 28 May 1998. In June 1990, the composer Jean Michel Jarre paid homage to the commander by entitling his new album "Waiting for Cousteau". He also composed the music for Cousteau's documentary "Palawan, the last refuge". On 2 December 1990, his wife Simone Cousteau died of cancer. In June 1991, in Paris, Jacques-Yves Cousteau remarried, to Francine