HMS Scotsman was a third-batch S-class submarine built for the Royal Navy during World War II, measuring 217 feet in length with a beam of 23 feet 9 inches and a draft of 14 feet 8 inches. Designed with a slightly larger and improved hull compared to earlier batches, Scotsman featured thicker hull plating that increased its diving depth to 350 feet. The vessel displaced approximately 814 long tons on the surface and 990 long tons when submerged. Powered by two 950-horsepower diesel engines for surface travel and electric motors for submerged operation, Scotsman could reach speeds of 15 knots on the surface and 10 knots underwater. It had a substantial range of 7,500 nautical miles at 10 knots on the surface, making it suitable for extended patrols. The submarine's armament included six 21-inch torpedo tubes in the bow, capable of carrying twelve torpedoes or twelve mines in lieu of torpedoes. Additional armament comprised a 4-inch deck gun and a 20mm Oerlikon AA gun. Constructed by Scotts Shipbuilding and Engineering Company in Greenock, Scotsman was ordered on 20 December 1941, laid down on 15 April 1943, and launched on 18 August 1944. She was commissioned on 9 December 1944 under Lieutenant Alan H. B. Anderson. After initial training exercises and a grounding incident requiring repairs, Scotsman departed for the Pacific theater in June 1945, arriving after the end of hostilities, and sank a junk en route to her unit. She returned to Britain in December 1945. Post-war, Scotsman underwent extensive modifications in 1947 to serve as a high-speed trials submarine, including relocating ballast tanks, removing torpedo tubes, streamlining the conning tower, and installing new diesel and electric propulsion systems. She participated in trials and fleet events, including the 1953 Coronation Fleet Review. Her final test involved deep submersion in 1964, during which she was sunk. The hulk was later raised and scrapped in November 1964, marking the end of her maritime service.

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