Guybon_Chesney_Castell_Damant--Jacques_Yves_Cousteau

Captain Guybon Chesney Castell Damant (25 July 1881 – 29 June 1963) was a British royal navy officer known for his scientific research on preventing decompression illness with John Scott Haldane, his leadership over a team of divers that salvaged 44 tons of gold bullion from the wreck of HMS Laurentic between 1917 and 1924, and the covert work he and his divers performed by entering into sunken U-boats during World War I and recovering code books, ciphers, and other materials for the Naval Intelligence Division of the Royal Navy.