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
Pierre-Antoine Cousteau most well-known post-war work was "Les lois de l'hospitalité" in which he justified collaboration, arguing "we [the collaborators] did not commit an error of judgement. There were just too many tanks and too many planes against us". He fell seriously ill in the late 1950s and had to withdraw from politics, requiring regular blood transfusions to survive. He died age 52 in Paris. Pierre-Antoine Cousteau Pierre-Antoine Cousteau (18 March 1906 – 17 December 1958) was a French far right polemicist and journalist. He was the brother of the famous explorer Jacques-Yves Cousteau. He was born in Saint-André-de-Cubzac, Gironde, and educated