HMS Sea Devil was an S-class submarine of the third batch built for the Royal Navy during World War II. Designed with notable enhancements over the preceding second batch, she measured 217 feet (66.1 meters) in length, with a beam of 23 feet 9 inches (7.2 meters) and a draft of 14 feet 8 inches (4.5 meters). Her displacement was 814 long tons (827 tons) on the surface and 990 long tons (1,010 tons) submerged. The vessel featured thicker hull plating, which increased her maximum diving depth to 350 feet (106.7 meters). Powered by two 950-brake-horsepower (708 kW) diesel engines for surface propulsion, each driving a propeller shaft, she could reach speeds of up to 15 knots (28 km/h). When submerged, she relied on electric motors producing 650 horsepower (485 kW) per propeller, allowing her to attain 10 knots (19 km/h). Sea Devil had a substantial fuel capacity, enabling a range of 7,500 nautical miles (13,900 km) at 10 knots on the surface and 120 nautical miles (220 km) at 3 knots submerged. Her armament included six 21-inch (533 mm) torpedo tubes at the bow, capable of carrying six reloads for a total of twelve torpedoes, or alternatively, twelve mines in place of torpedoes. She was also equipped with a 4-inch (102 mm) deck gun. Launched on 30 January 1945, HMS Sea Devil was the only Royal Navy vessel to bear that name. Her late commissioning meant she was en route to the Far East when World War II ended, thus she did not participate in combat. Post-war, she served in the Mediterranean from 1954 and was involved in testing infrared detection systems around Malta in 1955–1956. She notably participated in the 1953 Fleet Review celebrating Queen Elizabeth II’s coronation. Decommissioned at Portsmouth on 4 June 1962, she was the last of the S-class submarines in Royal Navy service. Sold for scrap to Metal Recoveries, she arrived at Newhaven on 15 December 1965, marking the end of her distinguished career.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.