HMS Scythian was an S-class submarine of the third batch built for the Royal Navy during World War II. Constructed by Scotts of Greenock, she was launched on 14 April 1944. As part of the improved third 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 865 long tons (879 tons) on the surface and 990 long tons (1,010 tons) submerged. The submarine was crewed by 48 officers and ratings and was capable of diving to depths of 300 feet (91.4 meters). Powered by two 950-brake-horsepower (708 kW) diesel engines for surface propulsion, each driving a propeller shaft, HMS Scythian could reach speeds of 15 knots (28 km/h) on the surface. When submerged, her electric motors provided 650 horsepower (485 kW) per propeller, allowing her to travel at 10 knots (19 km/h). Her operational range was substantial, with a 6,000-nautical-mile (11,000 km) range at 10 knots on the surface and 120 nautical miles (220 km) at 3 knots submerged. Armament included six 21-inch (533 mm) torpedo tubes at the bow, with six reload torpedoes, totaling twelve torpedoes, or alternatively, twelve mines could be carried. Her deck was armed with a 4-inch (102 mm) gun and a 20-millimeter Oerlikon anti-aircraft gun. During her brief wartime service, HMS Scythian saw limited action, operating mainly in the eastern station between March and May 1945. She sank nine Japanese sailing vessels and a small unidentified Japanese vessel, contributing to Allied efforts in the Pacific theater. Post-war, she participated in the 1951 search for the missing HMS Affray alongside sister ships Scorcher and Sirdar. Ultimately, HMS Scythian was decommissioned and arrived at Charlestown on 8 August 1960 for scrapping. She remains notable as the only Royal Navy vessel to bear the name Scythian.

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