Construction
In mid-1916, the British Admiralty placed orders for 23 destroyers based on the five V and W-class destroyer#Admiralty V class leaders, V-class leaders that had been ordered earlier that year. Two of these ships, ''Vanoc'' and , were ordered from the Clydebank shipyard John Brown & Company in June that year.Raven and Roberts 1979, pp. 5–5.Preston 1971, pp. 102–103. ''Vanoc'' was long length overall, overall with a Beam (nautical), beam of and a Draft (hull), draught of between and depending on load. Displacement (ship), Displacement was Displacement (ship)#Standard displacement, standard and up to under full load.Gardiner and Gray 1985, p. 83. Three oil-fed Yarrow boilers raising steam at fed Brown-Curtis geared steam turbines which developed , driving two screws for a maximum designed speed of .Lenton 1970, p. 23. ''Vanoc'' reached an average speed of during sea trials on 10 August 1917, with her engines generating and deep load displacement about .Raven and Roberts 1979, p. 5. The ship carried of oil giving a range of at . ''Vanoc''s main gun armament consisted of four QF 4 inch Mk V naval gun, 4-inch Mk V QF guns in four single mounts on the ship's centerline. These were disposed as two forward and two aft in superfiring, superimposed firing positions. A single QF 3-inch 20 cwt, QF 3-inch (76 mm) 20 cwt anti-aircraft gun was mounted aft of the second funnel. Aft of the 3-inch gun, she carried four British 21 inch torpedo, 21 inch (533 mm) torpedo tubes mounted in pairs on the center-line. It was decided in January 1917 to modify ''Vanoc'' as a minelayer. As such, the aft set of torpedo tubes and one 4 inch gun could be removed to accommodate up to 66 sea mine, mines, although the rated capacity was 44. The ship could be converted back to a fleet destroyer, with full armament, in about 12 hours.Friedman 2009, pp. 154–155.Preston 1971, p. 25. ''Vanoc'' was keel laying, laid down at John Brown & Company's Clydebank shipyard on 20 September 1916 and was launched on 14 June 1917.Friedman 2009, p. 312. She was commissioned on 15 August 1917 with the pennant number H33.Whitley 2000, p. 94. The vessel's name is that of an Arthurian knight in Walter Scott, Sir Walter Scott’s ''The Bridal of Triermain''.Modifications
Between the wars, modifications to the V-class destroyers were relatively limited, with the twin torpedo mounts generally being replaced by triple mounts as in the V and W-class destroyer#Admiralty W class, W class. As a minelayer, only the forward bank of tubes was replaced, giving ''Vanoc'' a five torpedo-tube outfit, while the 3 inch gun was replaced by a QF 2-pounder naval gun, 2-pounder "pom-pom".Lenton 1970, p. 21. After the Norwegian campaign, it was decided to strengthen the anti-aircraft armament of Royal Navy destroyers, with the V class being modified by removing the aft bank of torpedo tubes and replacing it by a single QF 12-pounder 12 cwt naval gun, 12-pounder anti-aircraft gun, with ''Vanoc'' modified by October 1940.Friedman 2009, pp. 239–241, 285. Other early modifications included the removal of one 4-inch gun ("Y"-mount) to allow the carrying on a heavy depth charge battery, with 50 charges carried, with the ship fitted to allow 10-charge patterns to be laid,Friedman 2009, pp. 236–237, 285. while List of World War II British naval radar#Type 286, Type 286M radar was fitted in early 1941. A major problem with the use of destroyers for escort work in the North Atlantic was their lack of endurance,Friedman 2009, p. 247.Brown 2007, p. 19. and ''Vanoc'' was converted to a V and W-class destroyer#Long-range escort, long-range escort at John I. Thornycroft & Company, Thornycroft's Southampton shipyard between April and November 1943.Preston 1971, p. 120. The long-range escort conversion involved removal of one boiler (and its associated funnel), to allow fitting of additional oil bunkers and extra accommodation to help solve a chronic overcrowding problem that had only got worse as crews had increased as the war progressed.Whitley 2000, p. 95. While power dropped to , cutting speed to , the ship's range increased by as much as . One 4-inch gun (in "A"-mount) was removed to accommodate a Hedgehog (weapon), Hedgehog forward-throwing anti-submarine projector, while the remaining set of torpedo tubes and the 12-pounder gun was removed to allow the ship's depth charge armament to be increased again to as many as 150 charges. Radar was changed to a Type 271 radar, Type 271 surface search radar mounted on the ship's bridge, with a Type 291 radar, Type 291 air search radar on the mainmast.Brown 2007, pp. 19, 21.Service
First World War
Following commissioning, ''Vanoc'' joined the 13th Destroyer Flotilla, Thirteenth Destroyer Flotilla, attached to the Battle Cruiser Fleet, Battle Cruiser Force of the Grand Fleet.English 2019, p. 59 In October 1917, ''Vanoc'' was part of a large scale operation involving 30 cruisers and 54 destroyers deployed in eight groups across the North Sea in an attempt to stop a suspected sortie by German naval forces. Despite these countermeasures the two German light cruisers and managed to evade the patrols and Action off Lerwick, attacked the regular convoy between Norway and Britain, sinking nine merchant ships and two destroyers, and , before returning safely to Germany. ''Vanoc'' remained with the Thirteenth Destroyer Flotilla, which formed part of the Battlecruiser Force of the Grand Fleet, until June 1918, when she joined the 12 Destroyer Flotilla, Twentieth Destroyer Flotilla.Dittmar and Colledge 1972, p. 22. The Twentieth Flotilla was a specialised minelaying flotilla, based at Immingham on the Humber,Friedman 2009, p. 155. which laid up to 20,000 mines during 1918, as well as carrying out its share of convoy escort and patrol duties. ''Vanoc'' herself laid 965 mines during the First World War.Smith 2005, p. 95.Between the wars
''Vanoc'' was reduced to 3/5th complement in January 1919, while remaining part of the Twentieth Flotilla. She returned to a full complement on 19 June that year. The Twentieth Flotilla, including ''Vanoc'', was deployed to the Baltic Sea, Baltic as part of the British campaign in the Baltic (1918–19), British intervention in the Russian Civil War. She was off Riga in October 1919 when British and French naval gunfire helped the Latvian army to drive off an attack by the pro-German West Russian Volunteer Army, which was attempting to set up a German-dominated puppet state.Preston 1971, pp. 31–33. ''Vanoc'' was attached to the 2nd Destroyer Flotilla, Second Destroyer Flotilla in November 1919, but was reduced to reserve at HMNB Devonport, Devonport on 5 February 1920. ''Vanoc'' was recommissioned in October 1923, serving as a special trials vessel at HMNB Portsmouth, Portsmouth. In November that year, ''Vanoc'', together with sister ship carried out rough-weather trials. ''Vanoc'' was then used for torpedo trials at , the Royal Navy's torpedo establishment. From January 1926, she was permanently attached to ''Vernon''. On 29 June 1927, ''Vanoc'', together with , and escorted the battlecruiser , carrying the George VI, Duke and Queen Elizabeth The Queen Mother, Duchess of York into Portsmouth at the end of the royal couple's tour of the Commonwealth. ''Vanoc'' was part of the British Mediterranean Fleet during the Spanish Civil War. Activities during Britain's attempt to enforce Non-intervention in the Spanish Civil War, non-intervention included ferrying an inspection team to Spanish protectorate in Morocco, Spanish Morocco in January 1937 to investigate German activities. In June 1938, ''Vanoc'' was sent to Alicante in response to Nationalist air attacks on British shipping, while on 30 December 1938, after the Republican destroyer ran aground at Catalan Bay following an engagement with Nationalist warships, ''Vanoc'' patrolled to prevent the Nationalists attacking while ''José Luis Díez'' was towed into Gibraltar to be interned.Gardiner and Chesneau 1980, p. 401.Second World War
''Vanoc'' was commanded by Lieutenant Commander James Godfrey Wood Deneys from 9 February 1939 to 15 December 1941. At the outbreak of the war, the ship was assigned to the 11th Destroyer Flotilla, based out of Plymouth, and in the early stages of hostilities undertook patrols in the English Channel and South Western Approaches areas. In February 1940, ''Vanoc'' accompanied escorting a Gibraltar bound convoy, before escorting two Liverpool bound convoys in March. In mid April, she accompanied ''Chrobry'' into Namsos Campaign, Namsos in Norway. On 29 April 1940, she deployed with the destroyers , , and to evacuate troops from Mo i Rana, Mo and Bodø to Harstad. Later, in June 1940, ''Vanoc'' took part in Operation Aerial, the evacuation of British and Allied troops from ports in western France, escorting a convoy of 10 ships from St Nazaire on 18June. In early March 1941, ''Vanoc'' was assigned to the 5th Escort Group (Royal Navy), 5th Escort groupBlair ''Hitler's U-Boat War: The Hunters 1939–1942'' 1990, p. 255. and on 15 March the group joined Convoy HX 112 as escort. On the night of 15/16 March, the German submarine , commanded by Fritz-Julius Lemp, sighted the convoy, and made a surface attack, torpedoing the tanker ''Erdona'', which did not sink. The destroyer spotted ''U-110'' and summoned ''Vanoc'' and . Together, the three destroyers attacked ''U-110'' with depth charges, and ''Vanoc'' and ''Scimitar'' were assigned to keeping the submarine submerged while the convoy sailed away. Despite this, Lemp evaded the destroyers and re-sighted the convoy later that night, sending location signals that helped to direct more U-boats against the convoy.Blair ''Hitler's U-Boat War: The Hunters 1939–1942'' 1990, pp. 254–255. At about 10:00 pm on the night of 16/17 March under the command of Otto Kretschmer infiltrated the convoy and fired ''U-99''s remaining eight torpedoes, hitting six merchant ships and sinking five of them. At 01:30, ''Walker''s sonar detected a submerged submarine, and after an initial attack by ''Walker'' and ''Vanoc'', ''Walker'' left to rescue survivors from ''U-99''s attack, leaving ''Vanoc'' to continue the attack. The depth charges caused serious flooding aboard the German submarine, , under the command of Joachim Schepke, and Schepke, fearing the submarine would sink, and hoping that he could torpedo the British destroyer, ordered ''U-100'' to the surface. ''Vanoc'' spotted ''U-100'' on the recently fitted but primitive Type 286M radar, the first confirmed British surface ship radar sighting of a U-boat, and rammed the German submarine, sinking her. Only six of ''U-100''s crew, not including Schepke, survived. Shortly afterwards, ''U-99'', which was trying to slip out of the convoy on the surface, spotted ''Walker'' and dived. ''Walker'' picked up ''U-99'' on her sonar and attacked with depth charges, forcing the submarine to the surface. ''Vanoc'' spotted the surfaced ''U-99'', and both destroyers opened fire on the stricken U-boat, which was scuttled by her crew as they abandoned ship.Blair ''Hitler's U-Boat War: The Hunters 1939–1942'' 1990, pp. 256–258.Brown 2007, pp. 76–77. From March 1942 she joined the Escort Group B-5 team of destroyers , USS Hale (DD-133), ''Caldwell'', , frigate , and corvettes , , , and .Rohwer & Hummelchen (1992) pp.124 Escort Group B-5 was reassigned to Caribbean trade convoys from March 1942; and returned to the Mid-Ocean Escort Force a year later to escort Convoy SC 122. On 16 March 1944, in the Straits of Gibraltar at position she co-operated with the frigate and three 3 US PBY Catalina, Catalina aircraft (VP 63) to sink the submarine with a Hedgehog (weapon), hedgehog attack, resulting in 52 dead (all hands) from ''U-392''. On 21 January 1945, ''Vanoc'' collided with, and sank, the naval trawler off Normandy. (). In June 1945, the ship was placed into reserve before being sold for scrap to T.W. Ward the following month. She was broken up sometime after mid-1946 in Falmouth.Notes
References
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