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 Triplet, with whom he had (before this marriage) two children, Diane and Pierre-Yves. Francine Cousteau currently continues her husband's work as the head of the Cousteau Foundation and Cousteau Society. From that point, the relations between Jacques-Yves and his elder son worsened. In November 1991, Cousteau gave an interview to the "UNESCO Courier", in which he stated that he was in favour of human population control and population decrease. Widely quoted on the Internet are these two paragraphs from the interview: "What should we do to eliminate suffering and disease? It's a wonderful idea but perhaps not altogether a beneficial