two twin torpedo tubes (Voyager, which was completed with triple tubes, was an Admiralty W-class unit ordered in December 1916), in 1921 all Admiralty V class had their forward bank replaced by a triple bank, for a total of five torpedoes; and from 1923 onwards most ships had their aft bank (twin tubes) replaced by a triple bank, for a total of six torpedoes, except in Vimy, Vanoc, Velox, Versatile and Vortigern in which only the forward bank was replaced. Vanquisher, Vanoc, Velox, Vehement, Venturous, Versatile, Vimiera, Vittoria and Vortigern were built with the ability to be converted into minelayers within 24 hours. For this purpose they would land their torpedo tubes and "Y" gun on the quarterdeck and have screens fitted to protect the mines, of which up to sixty could be carried. They could be distinguished by the permanent mine chutes at the stern. Ships Vancouver – built by William Beardmore & Company, Dalmuir, laid down 15 March 1917, launched 28 December 1917, completed 9 March 1918. Renamed Vimy on 1 April 1928 to release the name Vancouver for another destroyer acquired by the Royal Canadian Navy. Sold for breaking up 4 March 1947. – built by Beardmore, laid down 16 May 1917, launched 16 March 1918, completed 27 April 1918. Given pennant number G18. Sold for breaking up 4 March 1947. – built by Beardmore, laid down 28 July 1917, launched 3 May 1918, completed 21 June 1918, sold for breaking up 4 March 1947. Vanoc – built by John Brown & Company, Clydebank, laid down 20 September 1916, launched 14 June 1917, completed 15 August 1917, sold for breaking up 26 July 1945, wrecked off Penryn en route to breakers in June 1946, later salved and scrapped at Falmouth. – built by John Brown, laid down 27 September 1916, launched 18 August 1917, completed 2 October 1917. Given pennant number D54, sold for breaking up 4 March 1947. – built by J. Samuel White & Company, Cowes, laid down 7 December 1916, launched 4 September 1917, completed 5 December 1917, sold for breaking up 25 August 1936. Vega – built by William Doxford & Sons Ltd, Pallion, laid down 11 December 1916, launched 1 September 1917, completed 14 December 1917, sold for breaking up 4 March 1947. Vehement – built by William Denny & Brothers Limited, Dumbarton, laid down 1916, launched 6 July 1917, completed 1917,