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
King of the Coral Sea Rafferty, Charles Tingwell and Lloyd Berrell all knew each other from working in Sydney radio. Also featuring in the cast was Ilma Adey, a model and cabaret entertainer without any previous acting experience, and Frances Chin Soon, a local nurse from Thursday Island. The film was shot almost entirely on location on Thursday Island, except for the underwater footage, which was filmed off Green Island. Noel Monkman was primarily responsible for this. The filming was unique as the cameraman and the actors dived with a rare scuba known as the Lawson Lung. It was a patent violation of the Cousteau-Gagnan