British Battleship HMS Vanguard 1909

HMS Vanguard was one of three St Vincent-class dreadnought battleships built for the Royal Navy, launched on 22 February 1909 and commissioned on 1 March 1910. She spent her career assigned to the Home and Grand Fleets. Aside from participating in the Battle of Jutland in May 1916 and the inconclusive Action of 19 August several months later, her service during World War I mostly consisted of routine patrols and training in the North Sea.

Shortly before midnight on 9 July 1917 at Scapa Flow, Vanguard suffered a series of magazine explosions. She sank almost instantly, killing 843 of the 845 men aboard. The wreck was heavily salvaged after the war, but was eventually protected as a war grave in 1984. It was designated as a controlled site under the Protection of Military Remains Act 1986, and diving on the wreck is generally forbidden.

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