Jacques Cousteau and Pierre-Antoine was released in 1954. During the 1940s, Cousteau is credited with improving the aqua-lung design which gave birth to the open-circuit scuba technology used today. According to his first book, "" (1953), Cousteau started diving with Fernez goggles in 1936, and in 1939 used the self-contained underwater breathing apparatus invented in 1926 by Commander Yves le Prieur. Cousteau was not satisfied with the length of time he could spend underwater with the Le Prieur apparatus so he improved it to extend underwater duration by adding a demand regulator, invented in 1942 by Émile Gagnan. In 1943 Cousteau tried
Philippe Tailliez hundred dives, gradually going to deeper depths. These three divers would become known as the three "mousquemers" (musketeers of the sea). The Second World War separated their team temporarily and Tailliez in particular would take part at the time of the campaign in Syria, with naval action against the Vichy navy. On armistice leave and thus having time, in 1942 they made without breathing apparatus the first French underwater film: "Par dix-huit mètres de fond" (= "18 meters deep"), and the next year "Epaves" (= "Wrecks"), this time with the Cousteau-Gagnan aqualung, and with the funds of the Marseilles company