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
Alexandra Cousteau Alexandra Cousteau Alexandra Marguerite Clémentine Cousteau (born March 21, 1976) is a filmmaker and an environmental activist. Cousteau continues the work of her grandfather Jacques-Yves Cousteau and father Philippe Cousteau, Sr. Cousteau advocates the importance of conservation, restoration and sustainable management of ocean and water resources for a healthy planet and productive societies. Cousteau is the daughter of Philippe Cousteau and Jan Cousteau and the granddaughter of French explorer and filmmaker Jacques-Yves Cousteau and Simone Cousteau. She is a member of the third generation Cousteau family who explore and explain the natural world. At the age of four months, Cousteau