History of scuba diving the high number of recreational scuba accidents. this started with informal training and led to the creation of training and certification agencies. BS-AC was formed in 1953, CMAS in 1959, NAUI in 1960 and PADI in 1966. The sport of scuba diving had its roots among the multitude of small enthusiastic snorkelling and spearfishing clubs in the decades just before and after the Second World War. After the invention of the "aqualung" by Cousteau and Gagnan, the first commercially marketed underwater breathing apparatus became available for sale for sporting purposes in the late 1940s. In 1951, Jim Auxie Jr and
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