'Maiale' (= 'Pig') human torpedo, Leonardo da Vinci Museum of Science and Technology, Milan, 9 June 2015. Built at La Spezia in 1936. Two man crew. These craft were used to lay their detachable warheads under enemy ships in harbour. Their most famous attack was against the Royal Navy at Alexandria, Egypt, on 19 December 1941 when three of them disabled battleships HMS Queen Elizabeth and Valiant. Both ships settled on the sea bed. Queen Elizabeth was out of action for nine months, and Valiant for six. They also successfully attacked shipping in Gibraltar harbour. The British copied the idea and developed Chariot human torpedos, which they used against the Germans and Italians. There is a maiale in the Gosport submarine museum.