HMS Royal George was a 100-gun first-rate ship of the line of the Royal Navy, built at Woolwich Dockyard and launched on 18 February 1756. The largest warship in the world at the time of launching, she saw service during the Seven Years' War including being Admiral Sir Edward Hawke's flagship at the Battle of Quiberon Bay and later taking part in the Battle of Cape St Vincent. She sank undergoing routine maintenance work whilst anchored off Portsmouth on 29 August 1782 with the loss of more than 800 lives, one of the most serious maritime losses to occur in British waters.