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
Frédéric Dumas a 13th-century Romanesque tower made available by the municipality of Sanary-sur-Mer where Cousteau had a Villa and that bills itself as an historical city of diving. Frédéric Dumas Frédéric Dumas (14 January 1913 – 26 July 1991) was part of a team of three, with Jacques-Yves Cousteau and Philippe Tailliez, in which he was nicknamed Didi. They had a passion for diving, and developed the diving regulator with the aid of the engineer Émile Gagnan. Frédéric Dumas then participated with Jacques-Yves Cousteau in the discovery of the underwater world and in bringing it to the attention of the general public.