HMS Cygnet was a C-class destroyer built for the Royal Navy in the early 1930s, designed with a displacement of approximately 1,375 long tons at standard load and 1,865 long tons at deep load. She measured 329 feet in length, with a beam of 33 feet and a draught of 12 feet 6 inches. Powered by Parsons geared steam turbines driving two shafts, she developed a maximum speed of 36 knots, powered by three Admiralty 3-drum water-tube boilers. Her fuel capacity of 473 long tons of fuel oil enabled a range of about 5,500 nautical miles at 15 knots. The ship's complement consisted of 145 officers and men. Her armament included four 4.7-inch Mk IX guns in single mounts, with designated 'A', 'B', 'X', and 'Y' positions. For anti-aircraft defense, she was initially equipped with a single QF 3-inch 20 cwt gun (later removed in 1936) and two 40 mm QF 2-pounder Mk II guns, which were repositioned during her career. She also featured two quadruple torpedo tube mounts for 21-inch torpedoes and three depth-charge chutes, later increased to 33 charges during wartime. Constructed by Vickers-Armstrongs in Barrow-in-Furness, HMS Cygnet was laid down on December 1, 1930, launched on September 29, 1931, and completed on April 1, 1932. Initially assigned to the 2nd Destroyer Flotilla of the Home Fleet, she spent much of her early service undergoing repairs and deploying in the West Indies and the Red Sea during the Abyssinia Crisis. In late 1937, she was sold to Canada, renamed HMCS St. Laurent, and refitted to meet Canadian standards, including the installation of ASDIC. Stationed initially in Halifax and later in Esquimalt, she participated in various convoy escort missions and patrols during World War II. Notably, she was involved in evacuations from France, rescue operations, and anti-submarine warfare, credited with sinking at least one U-boat, U-356, in December 1942, and U-845 in March 1944, alongside allied ships. St. Laurent played a significant role in the Battle of the Atlantic and the Normandy landings, supporting convoy protection and anti-submarine operations. After the war, she was decommissioned in late 1945 and scrapped in 1947, leaving a notable legacy as a versatile and active wartime vessel.

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