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Captain Cowper Phipps Coles, C.B., R.N. (1819 – 7 September 1870), was an English naval captain with the Royal Navy. Coles was also an inventor; in 1859, he was the first to patent a design for a revolving gun turret. Upon appealing for public support, his turrets were installed on HMS Prince Albert and HMS Royal Sovereign. Coles died in a maritime accident in 1870 when HMS Captain, an experimental warship built to his designs, capsized and sank with him on board.