Porpoise (scuba gear) 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 on the back without a casing. The bag was between the canister and valve assembly and the diver's back. It had two wide breathing
Submarine Products Submarine Products Submarine Products Ltd (1959−1990) was a diving gear manufacturer, with a factory in Hexham in Northumberland, England. It was founded in 1959 by Lt.Cdr. Hugh Oswell. Until the late 1950s, the British Siebe Gorman company patents kept aqualungs expensive in Britain, and many British sport divers had to use home-made breathing sets and ex-armed forces or ex-industry rebreathers. Some became expert at home-making scuba diving demand regulators from industrial parts such as Calor Gas regulators. In 1959 Hugh Oswell designed around the Cousteau-Gagnan patent and made sport diving breathing sets accessibly inexpensive. Submarine Products Ltd were the first