HMS Sibyl was an S-class submarine of the Royal Navy, built during the Second World War by Cammell Laird and launched on 29 April 1942. As part of the Third Group of the S-class, she measured 217 feet (66.1 meters) in length, with a beam of 23 feet 9 inches (7.2 meters) and a draught 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) when submerged. The submarine was crewed by 48 officers and ratings and was designed with a maximum diving depth of 300 feet (91.4 meters). Powered for surface running by two 950-brake-horsepower diesel engines, each driving a propeller, Sibyl could reach speeds of up to 15 knots on the surface. When submerged, her electric motors allowed her to attain 10 knots. Her operational range on the surface was approximately 6,000 nautical miles at 10 knots, with a submerged range of 120 nautical miles at 3 knots. Her armament comprised seven 21-inch torpedo tubes—six in the bow and one in the stern—carrying a total of thirteen torpedoes, with the option to carry twelve mines instead of torpedoes. She was also equipped with a 3-inch (76 mm) deck gun, although it is uncertain whether she was fitted with a 20-millimeter Oerlikon AA gun initially or later. During her service, HMS Sibyl demonstrated notable success, sinking multiple enemy vessels including the Italian merchant Pegli, the French merchant St. Nazaire (in German service), the German auxiliary minesweeper M 7022/Hummer, five Greek sailing vessels, and an unknown sailing vessel. She also made unsuccessful attacks on other ships such as the Italian merchant Fabriano and the German tanker Centaur. Commanded initially by Lt. Ernest John Donaldson Turner, who was awarded the Distinguished Service Order, Sibyl later operated in the Pacific from early 1945. Her Pacific patrols included operations around the Andaman Islands and the Malacca Strait, where she sank Japanese vessels with gunfire and charges, despite being strafed and depth charged multiple times. She holds the distinction of being the first British submarine to surface in Singapore harbor after the Japanese surrender. Post-war, she was present during the surrender ceremony in Singapore and contributed to the liberation of prisoners of war. HMS Sibyl was decommissioned and sold for scrap, arriving at Troon in March 1948 for breaking up, concluding her distinguished wartime 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.