NAVYPEDIA

Ships

Name	No	Yard No	Builder	Laid down	Launched	Comp	Fate	Modification
Agassiz	K129		Burrard, Vancouver	4.1940	15.8.1940	1.1941	BU 11.1945	Canadian-built, 1939-1940 program
Alberni	K103		Canadian Yarrow, Esquimalt	4.1940	22.8.1940	2.1941	sunk 21.8.1944	Canadian-built, 1939-1940 program
Algoma	K127		Port Arthur SY	6.1940	17.12.1940	7.1941	to Venezuela 6.1945 (Constitucion)	Canadian-built, 1939-1940 program
Amherst	K148		St. John SY	5.1940	4.12.1940	8.1941	BU 11.1945	Canadian-built, 1939-1940 program
Arrowhead	K145		Marine Industries, Sorel	4/1940	8.8.1940	11/1940	to UK 6.1945	Canadian-built, 1939-1940 program
Arvida	K113		Morton, Quebec City	2.1940	21.9.1940	5.1941	sold 1950	Canadian-built, 1939-1940 program
Baddeck	K147		Davie SB, Lauzon	8.1940	20.11.1940	5.1941	sold 1947	Canadian-built, 1939-1940 program
Barrie	K138		Collingwood SY	4.1940	23.11.1940	5.1941	sold 1947	Canadian-built, 1939-1940 program
Battleford	K165		Collingwood SY	9.1940	15.4.1941	7.1941	to Venezuela 1946 (Libertad)	Canadian-built, 1939-1940 program
Bittersweet	K182		Marine Industries, Sorel	4/1940	12.9.1940	1/1941	to UK 6.1945	Canadian-built, 1939-1940 program
Brandon	K149		Davie SB, Lauzon	10.1940	29.4.1941	7.1941	BU 10.1945	Canadian-built, 1939-1940 program
Buctouche	K179		Davie SB, Lauzon	8.1940	20.11.1940	6.1941	BU 10.1945	Canadian-built, 1939-1940 program
Camrose	K154		Marine Industries, Sorel	9.1940	16.11.1940	6.1941	BU 1947	Canadian-built, 1939-1940 program
Chambly	K116		Canadian Vickers, Montreal	2.1940	29.7.1940	12.1940	sold 1952	Canadian-built, 1939-1940 program
Chicoutimi	K156		Canadian Vickers, Montreal	7.1940	16.10.1940	5.1941	BU 1946	Canadian-built, 1939-1940 program
Chilliwack	K131		Burrard, Vancouver	7.1940	14.9.1940	4.1941	BU 10.1945	Canadian-built, 1939-1940 program
Cobalt	K124		Port Arthur SY	4.1940	17.8.1940	11.1940	sold 1953	Canadian-built, 1939-1940 program
Collingwood	K180		Collingwood SY	3.1940	27/71940	11.1940	BU 1950	Canadian-built, 1939-1940 program
Dawson	K104		Victoria SY	9.1940	8.2.1941	10.1941	BU 1946	Canadian-built, 1939-1940 program
Dauphin	K157		Canadian Vickers, Montreal	7.1940	24.10.1940	5.1941	sold 1949	Canadian-built, 1939-1940 program
Drumheller	K167		Collingwood SY	12.1940	5.7.1941	9.1941	BU 1949	Canadian-built, 1939-1940 program
Dunvegan	K177		Marine Industries, Sorel	8.1940	11.12.1940	9.1941	to Venezuela 1946 (Independencia)	Canadian-built, 1939-1940 program
Edmundston	K106		Canadian Yarrow, Esquimalt	8.1940	22.2.1941	10.1941	sold 1948	Canadian-built, 1939-1940 program
Eyebright	K150		Canadian Vickers, Montreal	1/1940	22.7.1940	11/1940	to UK 6.1945	Canadian-built, 1939-1940 program
Fennel	K194		Marine Industries, Sorel	1/1940	20.8.1940	5/1941	to UK 6.1945	Canadian-built, 1939-1940 program
Galt	K163		Collingwood SY	5.1940	28.12.1940	5.1941	BU 10.1945	Canadian-built, 1939-1940 program
Hepatica	K159		Davie SB, Lauzon	2/1940	6.7.1940	5/1941	to UK 6.1945	Canadian-built, 1939-1940 program
Kamloops	K176		Victoria SY	4.1940	7.8.1940	3.1941	BU 10.1945	Canadian-built, 1939-1940 program
Kamsack	K171		Port Arthur SY	11.1940	5.5.1941	10.1941	to Venezuela 1945 (Carabobo)	Canadian-built, 1939-1940 program
Kenogami	K125		Port Arthur SY	4.1940	5.9.1940	6.1941	BU 1.1950	Canadian-built, 1939-1940 program
Lethbridge	K160		Canadian Vickers, Montreal	8.1940	21.11.1940	6.1941	sold 1952	Canadian-built, 1939-1940 program
Levis	K115		G T Davie, Lauzon	3.1940	4.9.1940	5.1941	sunk 19.9.1941	Canadian-built, 1939-1940 program
Louisburg	K143		Morton, Quebec City	10.1940	27.5.1941	10.1941	sunk 6.2.1943	Canadian-built, 1939-1940 program
Lunenburg	K151		G T Davie, Lauzon	9.1940	10.7.1941	12.1941	BU 6.1946	Canadian-built, 1939-1940 program
Matapedia	K112		Morton, Quebec City	2.1940	14.9.1940	5.1941	BU 12.1950	Canadian-built, 1939-1940 program
Mayflower	K191		Canadian Vickers, Montreal	2/1940	3.7.1940	5/1941	to UK 6.1945	Canadian-built, 1939-1940 program
Moncton	K139		St. John SY	12.1940	11.8.1941	4.1942	sold 1955	Canadian-built, 1939-1940 program
Moosejaw	K164		Collingwood SY	8.1940	9.4.1941	6.1941	BU 9.1949	Canadian-built, 1939-1940 program
Morden	K170		Port Arthur SY	10.1940	5.5.1941	9.1941	BU 11.1946	Canadian-built, 1939-1940 program
Nanaimo	K101		Canadian Yarrow, Esquimalt	4.1940	28.10.1940	4.1941	sold 1953	Canadian-built, 1939-1940 program
Napanee	K118		Kingston SY	3.1940	31.8.1940	5.1941	BU 6.1946	Canadian-built, 1939-1940 program
Oakville	K178		Port Arthur SY	12.1940	21.6.1941	11.1941	to Venezuela 1946 (Patria)	Canadian-built, 1939-1940 program
Orillia	K119		Collingwood SY	3.1940	15.9.1940	11.1940	BU 1.1951	Canadian-built, 1939-1940 program
Pictou	K146		Davie SB, Lauzon	7.1940	8.10.1940	4.1941	sold 1950	Canadian-built, 1939-1940 program
Prescott	K161		Kingston SY	1.1940	7.1.1941	6.1941	BU 10.1945	Canadian-built, 1939-1940 program
Quesnell	K133		Victoria SY	5.1940	12.11.1940	5.1941	BU 10.1945	Canadian-built, 1939-1940 program
Rimouski	K121		Davie SB, Lauzon	7.1940	3.10.1940	4.1941	BU 12.1950	Canadian-built, 1939-1940 program
Rosthern	K169		Port Arthur SY	6.1940	30.11.1940	6.1941	BU 6.1946	Canadian-built, 1939-1940 program
Sackville	K181, 1956- AN113		St. John SY	5.1940	15.5.1941	12.1941	survey vessel 1952, net/mine layer 1956, stricken 12.1982	Canadian-built, 1939-1940 program
Saskatoon	K158		Canadian Vickers, Montreal	8/1940	6.11.1940	6/1941	sold 1948	Canadian-built, 1939-1940 program
Shawinigan	K136		G T Davie, Lauzon	6.1940	16.5.1941	9.1941	sunk 25.11.1944	Canadian-built, 1939-1940 program
Shediac	K110		Davie SB, Lauzon	10.1940	29.4.1941	7.1941	sold 1954	Canadian-built, 1939-1940 program
Sherbrooke	K152		Marine Industries, Sorel	8.1940	25.10.1940	6.1941	BU 5.1947	Canadian-built, 1939-1940 program
Sorel	K153		Marine Industries, Sorel	8.1940	16.11.1940	8.1941	BU 11.1945	Canadian-built, 1939-1940 program
Snowberry	K166		Davie SB, Lauzon	2/1940	8.8.1940	5.1941	to UK 6.1945	Canadian-built, 1939-1940 program
Spikenard	K198		Davie SB, Lauzon	2.1940	10.8.1940	5.1941	sunk 11.2.1942	Canadian-built, 1939-1940 program
Sudbury	K162		Kingston SY	1.1941	31.5.1941	10.1941	sold 1949	Canadian-built, 1939-1940 program
Summerside	K141		Morton, Quebec City	10.1940	17.5.1941	9.1941	BU 7.1946	Canadian-built, 1939-1940 program
The Pas	K168		Collingwood SY	1.1941	18.8.1941	10.1941	sold 9.1945	Canadian-built, 1939-1940 program
Trail	K174		Burrard, Vancouver	7.1940	17.10.1940	4.1941	BU 8.1950	Canadian-built, 1939-1940 program
Trillium	K172		Canadian Vickers, Montreal	2/1940	26.6.1940	10/1940	to UK 6.1945	Canadian-built, 1939-1940 program
Wetaskiwin (ex-Banff)	K175		Burrard, Vancouver	4.1940	18.7.1940	12.1940	to Venezuela 1946 (Victoria)	Canadian-built, 1939-1940 program
Weyburn	K173		Port Arthur SY	12.1940	26.7.1940	11.1941	sunk 22.2.1943	Canadian-built, 1939-1940 program
Windflower	K155		Davie SB, Lauzon	2.1940	4.7.1940	5.1941	collision 7.12.1941	Canadian-built, 1939-1940 program
Brantford	K218		Midland SY	2.1941	6.9.1941	5.1942	sold 1950	Canadian-built, 1940-1941 program
Dundas	K229		Victoria SY	3.1941	25.7.1941	4.1942	BU 10.1945	Canadian-built, 1940-1941 program
Midland	K220		Midland SY	2.1941	25.6.1941	11.1941	BU 11.1945	Canadian-built, 1940-1941 program
New Westminster	K228		Victoria SY	2.1941	14.5.1941	1.1942	sold 1950	Canadian-built, 1940-1941 program
Timmins	K223		Canadian Yarrow, Esquimalt	12.1940	26.6.1941	2.1942	sold 1948	Canadian-built, 1940-1941 program
Vancouver (ex-Kitchener)	K240		Canadian Yarrow, Esquimalt	6.1941	26.8.1941	3.1942	BU 10.1945	Canadian-built, 1940-1941 program
Calgary	K231		Marine Industries, Sorel	3.1941	23.8.1941	12.1941	BU 8.1946	Canadian-built, revised 1940-1941 program
Charlottetown	K244		Kingston SY	6.1941	10.9.1941	12.1941	sunk 11.9.1942	Canadian-built, revised 1940-1941 program
Fredericton	K245		Marine Industries, Sorel	3.1941	2.9.1941	12.1941	sold 1946	Canadian-built, revised 1940-1941 program
Halifax	K239		Collingwood SY	4.1941	4.10.1941	11.1941	sold 7.1945	Canadian-built, revised 1940-1941 program
Kitchener (ex-Vancouver)	K225		G T Davie, Lauzon	2.1941	18.11.1941	6.1942	BU 9.1949	Canadian-built, revised 1940-1941 program
La Malbaie (ex-Fort William)	K273		Kingston SY	3.1941	25.10.1941	4.1942	BU 10.1945	Canadian-built, revised 1940-1941 program
Port Arthur	K233		Port Arthur SY	4.1941	18.9.1941	5.1942	sold 10.1945	Canadian-built, revised 1940-1941 program
Regina	K234		Marine Industries, Sorel	3.1941	14.10.1941	1.1942	sunk 8.8.1944	Canadian-built, revised 1940-1941 program
Ville de Quebec (ex-Quebec)	K242		Morton, Quebec City	6.1941	12.11.1941	5.1942	sold 1946	Canadian-built, revised 1940-1941 program
Woodstock	K238		Collingwood SY	5.1941	10.12.1941	5.1942	sold 1951	Canadian-built, revised 1940-1941 program

Technical data

Data variant	as completed	Sackville 1956
Displacement standard, t	950 Calgary, Charlottetown, Fredericton, Halifax, Kitchener, La Malbaie, Port Arthur, Regina, Ville de Quebec, Woodstock: 1015	1085
Displacement full, t	1280 Calgary, Charlottetown, Fredericton, Halifax, Kitchener, La Malbaie, Port Arthur, Regina, Ville de Quebec, Woodstock: 1350	1350
Length, m	57.9 pp 62.5 oa Calgary, Charlottetown, Fredericton, Halifax, Kitchener, La Malbaie, Port Arthur, Regina, Ville de Quebec, Woodstock: 63.5 oa	62.5
Breadth, m	10.1	10.1
Draught, m	4.14 - 4.80 deep load	4.00
No of shafts	1	1
Machinery	1 VTE, 2 cylindrical boilers Calgary, Charlottetown, Fredericton, Halifax, Kitchener, La Malbaie, Port Arthur, Regina, Ville de Quebec, Woodstock, Brentford, Midland, New Westminster, Timmins, Vancouver: 1 VTE, 2 Admiralty 3-drum boilers	1 VTE, 2 cylindrical boilers
Power, h. p.	2750	2750
Max speed, kts	16.5	16.5
Fuel, t	oil 230	oil 230
Endurance, nm(kts)	3500(12)
Armament	Brantford, Calgary, Charlottetown, Dundas, Fredericton, Halifax, Kitchener, La Malbaie, Midland, New Westminster, Port Arthur, Regina, Timmins, Vancouver, Ville de Quebec, Woodstock: 1 x 1 - 102/45 BL Mk IX, 1 x 1 - 40/39 2pdr QF Mk VIII, 2 x 1 - 20/70 Oerlikon Mk II/IV, 1 x 24 - 178 Hedgehog ASWRL, 4 DCT, 2 DCR (70) Agassiz, Alberni, Algoma, Amherst, Arvida, Arrowhead, Baddeck, Barrie, Battleford, Bittersweet, Brandon, Buctouche, Camrose, Chambly, Chicoutimi, Chilliwack, Cobalt, Collingwood, Dauphin, Dawson, Drumheller, Dunvegan, Edmundston, Eyebright, Fennel, Galt, Hepatica, Kamloops, Kamsack, Kenogami, Lethbridge, Levis, Louisburg, Lunenburg, Matapedia, Mayflower, Moncton, Moose Jaw, Morden, Nanaimo, Napanee, Oakville, Orillia, Pictou, Prescott, Quesnell, Rimouski, Rosthern, Sackville, Saskatoon, Shawinigan, Shediac, Sherbrooke, Snowberry, Sorel, Spikenard, Sudbury, Summerside, The Pas, Trail, Trillium, Wetaskiwin, Weyburn, Windflower: 1 x 1 - 102/45 BL Mk IX, 2 x 2 - 12.7/62, 2 DCT, 2 DCR (40)	mines
Electronic equipment	type 271 or type 286 (some) radars, type 123 sonar
Complement	85 - 109	38

Project history

The ships, played a huge role in battle for Atlantic and become for Englishmen on of the symbols of a victory. Early 1939 Admiralty formulated requirements to new patrol ship for operations in a coastal area. Anti-submarine protection of merchant shipping should become her basic task, so new ship had to had powerful anti-submarine armament and 16-17kts speed, not yielding to surface speed of submarines. From several design one, created on Smith's Dock`s Ltd South Bank in Middlesborough, has been chosen. It was created on the basis of 160ft whaler Southern Pride, built on the same yard. As the order for the new patrol ships was from beginning supposed to be placed on the yards which do not have experience of naval shipbuilding and not familiar with Admiralty standards, the design was made according to standards of merchant shipbuilding more habitual for builders (Lloyd register standards). Machinery with the same purpose have chosen enough conservative: well familiar to reservists triple expansion engine which without changes have borrowed at a prototype. The steam was produced by single-side fire-tube boilers of so-called "Scottish" type. Perhaps, transition to oil-firing became a unique innovation. The hull of the patrol ship, in comparison with a prototype, have extended on 30ft for propulsion improvement. Simultaneously it allowed to increase number of watertight compartments and additional internal volume can be used for placing of magazines and increased crew. They were re-classified from patrols to corvettes just before lead ship was laid down. The 1939 program provided building of 56 ships, as names of flowers were used, and all series has received non-proprietary name "Flower". The beginning of war has led to order increase: under "War Emergency program" have built 50, and under the 1940 program 25 more ships. Besides, Royal Navy has replenished with three corvettes of this class ordered by France and requisitioned 1.7.1940; the fourth ship La Bastiaise was lost on a mine 22.6.1940 during sea trials, formally being still the property of the builder. Seven early-built ships have received minesweeping equipment. Trials of a lead corvette in April, 1940 have opened both strong, and weaknesses of "Flower" class. The ship differed phenomenal manoeuvrability: tactical diameter on full speed was about two hull lengths at only 3° list. At the same time it became clear, that her seaworthiness is insufficient for operations in the high sea: on a wave crew very quickly were seasick, and because of a short forecastle a deck around a superstructure strongly sloshed. With last lack they have consulted, significantly having prolonged a forecastle towards a stern. Besides protection against waves, it has increased the covered volume of the hull which used for placing increased more than in one and a half time, in comparison with the original design, crew (from 50 to 85 men). A forecastle have extended by all incomplete ships which degree of readiness supposed it (part of "War Emergency program" ships and the majority of the 1941 program). Canada also built "Flowers". At first Royal Navy has ordered 10 ships, however they were transferred to Canada before completion. Canadians built for themselves 70 more corvettes, the majority from which was extra equipped with the minesweeping equipment.

Modernizations

1943 - 1945, all survived ships: had light AA armament consisted of (1 x 1 - 40/39 2pdr QF Mk VIII, 2 x 1 - 20/70 Oerlikon Mk II/IV) or (1 x 1 - 40/39 2pdr QF Mk VIII, 4 x 1 - 20/70 Oerlikon Mk II/IV) or 3 x 1 - 20/70 Oerlikon Mk II/IV or 4 x 1 - 20/70 Oerlikon Mk II/IV or (2 x 2 - 20/70 Oerlikon Mk II/IV, 2 x 1 - 20/70 Oerlikon Mk II/IV). ASW armament consisted of 1 x 24 - 178 Hedgehog ASWRL (on some ships), 4 DCT and 2 DCR (up to 72 DC)

1956, Sackville was converted to controlled minelayer, as given in the table.

Naval service

Submarines sunk Levis (German submarines U74 and U552 19.9.1941), Charlottetown (U517 11.9.1942), Shawinigan (U1228 25.11.1944). On mines were lost Weyburn (22.2.1943), Regina (8.8.1944 or sunk by German submarine U667) and Albernie (21.8.1944). Was sunk by aircraft Louisburg (Italian air torpedo 16.2.1943).