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HMS Cygnet (H83)
HMS ''Cygnet'' was a C-class destroyer built for the Royal Navy in the early 1930s. The ship was initially assigned to the Home Fleet, although she was temporarily deployed in the Red Sea during the Abyssinia Crisis of 1935–36. ''Cygnet'' was sold to the Royal Canadian Navy (RCN) in late 1937 and renamed HMCS ''St. Laurent''. She was stationed on the west coast of Canada when World War II began in September 1939, and had to be transferred to the Atlantic coast for convoy escort duties. She served as a convoy escort in the Battle of the Atlantic and participated in the sinking of two German submarines. The ship was on anti-submarine patrols during the invasion of Normandy, and was employed as a troop transport after VE Day for returning Canadian servicemen. ''St. Laurent'' was decommissioned in late 1945 and scrapped in 1947.
==Design and construction==
''Cygnet'' displaced at standard load and at deep load. The ship had an overall length of , a beam of and a draught of . She was powered by Parsons geared steam turbines, driving two shafts, which developed a total of and gave a maximum speed of . Steam for the turbines was provided by three Admiralty 3-drum water-tube boilers. ''Cygnet'' carried a maximum of of fuel oil that gave her a range of at . The ship's complement was 145 officers and men.〔Whitley, p. 26〕
The ship mounted four 45-calibre 4.7-inch Mk IX guns in single mounts, designated 'A', 'B', 'X', and 'Y' from front to rear. For anti-aircraft (AA) defence, ''Cygnet'' had a single QF 3-inch 20 cwt〔"cwt" is the abbreviation for hundredweight, 30 cwt referring to the weight of the gun.〕 AA gun between her funnels, and two QF 2-pounder Mk II AA guns mounted on the aft end of her forecastle deck. The AA gun was removed in 1936 and the 2-pounders were relocated to between the funnels. She was fitted with two above-water quadruple torpedo tube mounts for 21-inch torpedoes.〔Lenton, p. 154〕 Three depth-charge chutes were fitted, each with a capacity of two depth charges. After World War II began this was increased to 33 depth charges, delivered by one or two rails and two throwers.〔Friedman, pp. 209, 236, 298–99〕
The ship was ordered on 15 July 1930 from Vickers-Armstrongs, Barrow-in-Furness under the 1929 Programme. ''Cygnet'' was laid down on 1 December 1930, launched on 29 September 1931,〔English, p. 45〕 as the 14th ship to carry the name,〔Colledge, p. 87〕 and completed on 1 April 1932.〔
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