High Quality Content by WIKIPEDIA articles! Admiral Sir Frederic Charles Dreyer, GBE, KCB (8 January 1878 – 11 December 1956) was an officer of the Royal Navy. A gunnery expert, he developed a fire control system for British warships, and served as Jellicoe`s flag captain at Jutland. He retired with the rank of Admiral in 1943, having served through two world wars and having already retired once.