Porpoise (scuba gear) Porpoises still exist. Only a few of these early models are known today, the rarest being the CA-2, made for use with two tanks. Porpoise (scuba gear) Porpoise is a tradename for scuba developed by Ted Eldred in Australia and made there from the late 1940s onwards. The first Porpoise was a closed circuit oxygen rebreather, and the following models were all single hose open circuit regulators. This rebreather was developed by Ted Eldred in the late 1940s and early 1950s. Some were made and used for sport diving, but they did not go into full production. It was worn
Jacques Cousteau with the Cannes Film Festival 1951). Cousteau and the "Élie Monnier" then took part in the rescue of Professor Jacques Piccard's bathyscaphe, the FNRS-2, during the 1949 expedition to Dakar. Thanks to this rescue, the French Navy was able to reuse the sphere of the bathyscaphe to construct the FNRS-3. The adventures of this period are told in the two books "" (1953, by Cousteau and Dumas) and "Plongées sans câble" (1954, by Philippe Tailliez). In 1949, Cousteau left the French Navy. In 1950, he founded the French Oceanographic Campaigns (FOC), and leased a ship called "Calypso" from Thomas Loel