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Battle-class trawler
Battle-class trawlers were naval trawlers built for and used by the Royal Canadian Navy (RCN) during the First World War. Between the wars, some remained in RCN service, but most were transferred to the Department of Marine and Fisheries, where they performed a number of functions, including working as lightships and fisheries patrol vessels. During the Second World War, a number of these trawlers were re-acquired by the RCN, but all the navy's Battle class trawlers were decommissioned soon after the war. A number of the class remained in civilian government and commercial service for years after the war, although most had been disposed of by the early 1960s.
==Origins and Military Service==
The RCN's Battle class trawlers formed part of the Canadian naval response to Admiralty warnings to Canada about the growing German U-boat threat to merchant shipping in the western Atlantic. Intended to augment anti-submarine patrols off Canada's east coast, these ships were modelled on contemporary British North Sea trawlers, since the standard types of Canadian fishing vessels were considered unsuitable for patrol work. The resulting design was a -long vessel with a beam of about , a draft of around , and a top speed of , which made it roughly comparable to the Royal Navy's Castle class trawlers. The 12-pounder gun that was the Battle class trawlers' main armament was considered to be the smallest gun that stood a chance of putting a surfaced U-boat out of action, and they also carried a small number of depth charges. Named after battles of the Western Front during the First World War, they were built by shipyards on the Great Lakes and St. Lawrence River at a cost of some $191,000 each, and entered service relatively late in the war.〔Gibert Norman Tucker, (Naval Service of Canada: Volume I: Origins and Early Years'' ), (Ottawa: King's Printer, 1952), 253-257.〕〔Ken Macpherson and John Burgess, ''The ships of Canada's naval forces 1910–1993 : a complete pictorial history of Canadian warships'', (St. Catharines, Ont.: Vanwell Pub., 1994), 25. ISBN 0-920277-91-8〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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