Battle-class trawler

Class overview
Armentières at Vancouver on 27 May 1933
Name:	Battle class
Builders:	Canadian Vickers, Montreal Polson Iron Works, Toronto Kingston Shipbuilding, Kingston
Operators:	Royal Canadian Navy
Built:	1917
In commission:	1917–1946
Completed:	12
Retired:	12
General characteristics
Type:	Naval trawler
Displacement:	320 long tons (330 t) (Festubert, Messines, St. Eloi, St. Julien, Vimy, Ypres) 357 long tons (363 t) (Arleux, Armentières, Arras, Givenchy, Loos, Thiepval)
Length:	130 ft (40 m)
Beam:	23 ft 5 in (7.14 m) (Festubert, Messines, St. Eloi, St. Julien, Vimy, Ypres) 25 ft (7.6 m) (Arleux, Armentières, Arras, Givenchy, Loos, Thiepval)
Draught:	13 ft 5 in (4.09 m) (Festubert, Messines, St. Eloi, St. Julien, Vimy, Ypres) 13 ft (4.0 m) (Arleux, Armentières, Arras, Givenchy, Loos, Thiepval)
Propulsion:	1 x triple expansion, 480 ihp (360 kW)
Speed:	10 knots (12 mph; 19 km/h)
Armament:	1 × QF 12 pounder 12 cwt naval gun

The Battle-class trawlers were a class of 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.

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.

Twelve vessels were ordered on 2 February 1917 from two shipyards, Polson Iron Works of Toronto and Canadian Vickers of Montreal. Those vessels built at Polson Iron Works displaced 320 long tons (330 t) and were 130 feet (40 m) long overall with a beam of 23 feet 5 inches (7.14 m) and a draught of 13 feet 5 inches (4.09 m). Those trawlers ordered from Canadian Vickers displaced 357 long tons (363 t), with the same length, a beam of 25 feet (7.6 m) and a draught of 13 feet (4.0 m). The vessels were propelled by a steam-powered triple expansion engine driving one shaft creating 480 indicated horsepower (360 kW) giving the vessels a maximum speed of 10 knots (19 km/h; 12 mph).

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