Timeline Of Diving Technology
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become available to the public.
1956: ## US Navy publishes tables that allow for repetitive diving.
Around this time, some British scuba divers start making homemade diving demand regulators from industrial parts, including Calor Gas regulators. (Since then, Calor Gas regulators have been redesigned, and this conversion is now impossible.)
Later, Submarine Products Ltd in Hexham in Northumberland, England designed round the Cousteau-Gagnan patent and made sport diving breathing sets accessibly cheap. This forced Siebe Gorman’s and Heinke’s prices down and started them selling to the sport diving trade. (Siebe Gorman gave its drysuit the tradename “Frogman”.) Because of this better availability of aqualungs, BSAC’s policy towards rebreathers became merely “Here be dragons: keep out!” and remained
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