HMS Seawolf was a second-batch S-class submarine constructed for the Royal Navy in the 1930s, with her keel laid on 25 May 1934 at Scotts Shipbuilding & Engineering in Greenock. She was launched on 28 November 1935 and completed by 12 March 1936. As part of the 2nd Submarine Flotilla, she measured 208 feet 8 inches (63.6 meters) in length, with a beam of 24 feet (7.3 meters) and a mean draught of 11 feet 10 inches (3.6 meters). Her displacement was 768 long tons (780 tonnes) on the surface and 960 long tons (980 tonnes) submerged. The vessel's crew comprised approximately 40 officers and ratings, and she was capable of diving to depths of 300 feet (91.4 meters). Designed for operations in the North and Baltic Seas, Seawolf was powered on the surface by two 775-brake-horsepower (578 kW) diesel engines, each driving a propeller, and submerged by two 650-horsepower (485 kW) electric motors. Her maximum speeds were 13.75 knots (25.5 km/h) on the surface and 10 knots (19 km/h) underwater. Her operational range was 6,000 nautical miles (11,100 km) at 10 knots on the surface, with a submerged range of 64 nautical miles (119 km) at 2 knots. Armament included six 21-inch (533 mm) torpedo tubes located in the bow, with six reload torpedoes, totaling twelve torpedoes. Additionally, she was equipped with a 3-inch (76 mm) deck gun. During her service in World War II, Seawolf engaged in patrols in the Skagerrak, attacking but not hitting targets such as the German light cruiser Nürnberg and the torpedo boat Falke in October 1939. She sank the German merchant Hamm in April 1940 and claimed to have sunk another merchant, Bessheim, in November 1940. Notably, Seawolf was involved in tracking the German battleship Bismarck and sighted the German battleship Tirpitz in March 1942 while escorting her from Trondheim. In 1943, she was transferred to Halifax, Nova Scotia, to assist the Royal Canadian Navy with anti-submarine warfare training. Commanded by Commander Denis Woolnough Mills from August 1943 to August 1944, Seawolf served until she was sold for scrap in November 1945 to Marine Industries of Montreal. Her service contributed to the Royal Navy’s and Allied efforts during the war, exemplifying the versatile role of S-class submarines in maritime warfare.

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