NAVYPEDIA

Ships

Name	No	Yard No	Builder	Laid down	Launched	Comp	Fate	Modification
Fraser (ex-Crescent)	H48		Vickers-Armstrong, Barrow, UK	2/1930	29.9.1931	4/1932 // 2.1937	collision 25.6.1940	"C" group
St. Laurent (ex-Cygnet)	H83		Vickers-Armstrong, Barrow, UK	12/1930	29.9.1931	4/1932 // 2.1937	BU 11.1945	"C" group
Restigouche (ex-Comet)	H00		Portsmouth DYd, UK	9/1930	30.9.1931	6/1932 // 6.1938	BU 11.1945	"C" group
Ottawa (ex-Crusader)	H60		Portsmouth DYd, UK	9/1930	30.9.1931	5/1932 // 6.1938	sunk 14.9.1942	"C" group
Assiniboine (ex-Kempenfelt)	I18		White, Cowes, UK	10/1930	29.10.1931	10/1931 // 10.1939	wrecked 10.11.1945	"C" group
Margaree (ex-Diana)	H49		Palmers, Jarrow, UK	6/1931	16.6.1932	12/1932 // 9.1940	collision 22.10.1940	"D" group
Kootenay (ex-Decoy)	H75		Thornycroft, Woolston, UK	6/1931	7.6.1932	4/1933 // 4.1943	BU 1.1946	"D" group

Technical data

Displacement standard, t	1375 - 1400
Displacement full, t	1865 - 1942 (later 2040 - 2100)
Length, m	96.9 pp 100.3 oa
Breadth, m	10.1
Draught, m	3.78 (later 3.96 - 4.06)
No of shafts	2
Machinery	2 sets Parsons geared steam turbines, 3 Admiralty 3-drum boilers Assiniboine: 2 sets Parsons geared steam turbines, 3 Yarrow boilers
Power, h. p.	36000
Max speed, kts	36
Fuel, t	oil 461 - 473
Endurance, nm(kts)	5500(15)
Armament	Fraser, St. Laurent, Restigouche, Ottawa: 4 x 1 - 120/45 QF Mk IX, 2 x 1 - 40 2pdr QF Mk II, 2 x 4 - 533 TT, 3 DCR (6 DC), mechanical minesweeping gear Assiniboine: 4 x 1 - 120/45 QF Mk IX, 2 x 1 - 40 2pdr QF Mk II, 2 x 4 - 533 TT Margaree: 4 x 1 - 120/45 QF Mk IX, 2 x 1 - 40/39 2pdr QF Mk II, 2 x 4 - 533 TT, 2 DCT, 1 DCR (20 DC) Kootenay: 2 x 1 - 120/45 QF Mk IX, 1 x 1 - 76/45 20cwt QF Mk I/II/III/IV, 6 x 1 - 20/70 Oerlikon Mk II/IV, 1 x 4 - 533 TT, 1 x 24 - 178 Hedgehog ASWRL, 2 DCT, 1 DCR (50 DC)
Electronic equipment	Fraser, St. Laurent, Restigouche, Ottawa, Assiniboine: type 119 sonar Margaree: type 121 sonar Kootenay: type 271, type 286 radars, type 121 sonar
Complement	145 Assiniboine: 175

Standard scale images

Project history

These destroyers were built under 1929 ("C" class) and 1930 ("D" class) programs. Development of "A" class, for the account some the bigger dimensions are fuel stowage increased by 20%, new fire control system established and the antiaircraft armaments are strengthened. In order to avoid loss of speed because of the increased displacement machinery power was increased to 36 000hp.

Occurrence of new fire control system led to a enlarging of the superstructure, differing original splitting (chart room, forming director basis, has was on some distance from a bridge.

The antiaircraft 76mm gun as originally appeared should change 40mm pompoms, but in an ultimate variant they remained by the ships, however they have removed from a habitual position between funnels (where now 76mm gun was placed) on a forecastle deck.

In remaining "C" class differed few from the predecessors. By analogy to "A" class they received minesweeping equipment to the detriment of anti-submarine abilities, but their a little bigger dimensions allowed to have sonar.

The ships of the 1930 program ("D" class) were built on the same design as "C", difference consisted in strengthening of anti-submarine arms at the expense of removing of the minesweeping equipment and installation on part of the ships of 12.7mm quadruple machine guns instead of 40mm pompoms. Pompoms on "C" class are on a forecastle deck, on "D" class their place had chosen to the increased bridge wings leaning against massive steel pipes. The superstructure without exotic "splitting" became last feature.

Modernizations

late 1939 - early 1940, Assiniboine, Restigouche, Fraser, Ottawa, St. Laurent: - 2 DCR; + 2 DCT (50 DC for all)

mid-1940 - early 1941, Assiniboine, Restigouche, Ottawa, St. Laurent and, probably, Margaree: - 1 x 4 - 533 TT; + 1 x 1 - 76/45 QF Mk I/II/III/IV

mid-1940 - early 1941, Assiniboine, Restigouche, Ottawa, St. Laurent: - 2 x 1 - 40/39; + 2 x 4 - 12.7/62

1941-1942, most survived earlier ships: + type 271, type 286 radars

1942 - 1943, Restigouche, St. Laurent: - 2 x 1 - 120/45, 1 x 1 - 76/45, 2 x 4 - 12.7/62, type 119 sonar; + 2 x 1 - 57/40 6pdr Hotchkiss Mk I, 2 x 2 - 20/70 Oerlikon Mk II/IV, 2 x 1 - 20/70 Oerlikon Mk II/IV, 1 x 24 - 178 Hedgehog ASWRL, 2 DCT, DC stowage increased up to 50, type 144 sonar

1943, Assiniboine: - 1 x 1 - 120/45, 1 x 1 - 76/45, 2 x 4 - 12.7/62, type 119 sonar; + 2 x 2 - 20/70 Oerlikon Mk II/IV, 2 x 1 - 20/70 Oerlikon Mk II/IV, 2 x 12 - 178 Split Hedgehog Mk II ASWRL, 2 DCT, DC stowage increased up to 50, type 144 sonar

1943 - 1944, many survived: - type 286 radar; + type 291 radar

1944, all: + 4 DCT, 1 DCR (125 DC)

1944, Kootenay: - 1 x 1 - 76/45, 1 x 24 - 178 Hedgehog ASWRL; + 1 x 1 - 120/45 QF Mk IX, 2 x 12 - 178 Split Hedgehog Mk II ASWRL

Naval service

Fraser was lost in a mouth of Gironde at collision with cruiser Calcutta 28.6.1940. Ottawa was sunk by German submarine U91 at coast of Canada 14.9.1942. Margaree was lost at collision with s/s Port Fairy in Northern Atlantic 22.10.1940. Assiniboine wrecked at Prince William Island 10.11.1945.

© Ivan Gogin, 2015