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
The Voyage of the Arctic Tern Rose, which was an example of a carrack warship. A bit of the Mary Rose wreck's recent history is mentioned in the story, with a brief description of its first salvage attempt in the 19th century by brothers John and Charles Deane. Other real historical figures are also briefly mentioned in the story, such as 19th century French microbiologist Louis Pasteur, and 20th century French co-developers of the Aqua-Lung, Émile Gagnan and Jacques Cousteau. The main fictional character of Bruno was inspired by a real-life diver of wrecks named Bruno, whom Montgomery had met while working on the Mary Rose