HMCS Vimy

Vimy (right) and St Julien (left) under construction in Toronto, 1917
History
Canada
Name	Vimy
Namesake	Battle of Vimy Ridge
Ordered	2 February 1917
Builder	Polson Iron Works Limited, Toronto
Launched	17 July 1917
Commissioned	13 November 1917
Decommissioned	30 November 1918
Renamed	Re-designated Lightship No. 5
Fate	Possibly broken up around 1958
General characteristics
Class and type	Battle-class naval trawler
Displacement	320 long tons (330 t)
Length	130 ft (40 m)
Beam	23 ft 5 in (7.14 m)
Draught	13 ft 5 in (4.09 m)
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

HMCS Vimy was one of twelve Battle-class naval trawlers constructed for and used by the Royal Canadian Navy (RCN) during the First World War. Following the war the ship was transferred to the Canadian Department of Marine and Fisheries and converted into a lightvessel. Re-designated Lightship No. 5, the vessel remained in Canadian government service until being possibly broken up for scrap in 1958.

Design and description

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. ^[1] 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. ^[2]

Twelve vessels were ordered on 2 February 1917 from two shipyards, Polson Iron Works of Toronto and Canadian Vickers of Montreal. ^[3] 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). ^[4] They 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). ^{[3] [5]}

All twelve trawlers were equipped with a QF 12-pounder 12 cwt naval gun mounted forward. ^{[4] [lower-alpha 1]} This 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. ^{[1] [6]} The trawlers were named after battles of the Western Front during the First World War that Canadians had been involved in. They cost between $155,000 and $160,000 per vessel. ^{[3] [lower-alpha 2] [lower-alpha 3]}

Service history

Named after the Battle of Vimy Ridge, the trawler was built by Polson Iron Works at Toronto, Ontario, and was launched on 16 June 1917. ^[7] Intended for use during the 1917 shipping season, the construction of the vessels was delayed by the entry of the United States into the war. With higher wages found south of the border, a shortage of skilled labour developed in the shipyards, coupled with a shortage of construction material. ^[8] Vimy was commissioned on 13 November 1917. ^[7] Vimy sailed to the east coast where for the 1918 shipping season, all the Battle-class trawlers were assigned to patrol and escort duties based out of Sydney, Nova Scotia. The Battle class was used for patrol and escort duties off the Atlantic coast of Canada until the end of the war. ^[9]

The trawler was paid off on 30 November 1918. The ship was transferred to the Department of Marine and Fisheries in 1922 and converted into a lightship, like sister ships Messines, St. Eloi, and St. Julien. ^{[7] [10]} This involved placing an electric light at the foremast head and installing a foghorn atop a latticework tower. ^[10] The ship was re-designated Lightship No. 5 and the vessel was possibly broken up for scrap in 1958. ^{[7] [11]}

References

Notes

1. "Cwt" is the abbreviation for hundredweight, 20 cwt referring to the weight of the gun.
2. Adjusted for inflation to 2023 dollars, $2,466,067 to $2,545,618
3. Tucker places the cost at $191,000 (adjusted for inflation to 2023 dollars, $3,038,831) ^{[lower-alpha 4]}

Citations

1. Tucker, p. 253
2. Tucker, pp. 254, 257
3. Johnston et al., p. 417
4. Macpherson and Barrie, p. 27
5. Maginley and Collin, p. 67
6. Tucker, p. 257
7. Macpherson and Barrie, p. 30
8. Johnston et al., pp. 481–484
9. Johnston et al., pp. 543, 645
10. Maginley and Collin, p. 113
11. Colledge, p. 667

Sources

• Colledge, J. J.; Warlow, Ben (2006) [1969]. Ships of the Royal Navy: The Complete Record of all Fighting Ships of the Royal Navy (Rev. ed.). London: Chatham Publishing. ISBN   978-1-86176-281-8.
• Johnston, William; Rawling, William G.P.; Gimblett, Richard H. & MacFarlane, John (2010). The Seabound Coast: The Official History of the Royal Canadian Navy, 1867–1939. Vol. 1. Toronto: Dundurn Press. ISBN   978-1-55488-908-2.
• Macpherson, Ken & Barrie, Ron (2002). The Ships of Canada's Naval Forces 1910–2002 (Third ed.). St. Catharines, Ontario: Vanwell Publishing. ISBN   1-55125-072-1.
• Maginley, Charles D. & Collin, Bernard (2001). The Ships of Canada's Marine Service. St. Catharines, Ontario: Vanwell Publishing Limited. ISBN   1-55125-070-5.
• Tucker, Gilbert Norman (1962). The Naval Service of Canada, Its Official History – Volume 1: Origins and Early Years. Ottawa: King's Printer. OCLC   840569671.

External links

• Battle-class trawlers