Wsrtjtyk

	; HMS Swale; ;
Class overview
Operators:	; ; ; World War II:; ; ; ; Royal Navy; ; ; ; Royal Australian Navy; ; ; ; Royal Canadian Navy; ; ; ; Free French Naval Forces; ; ; ; Royal Netherlands Navy; ; ; ; South African Navy; ; ; ; United States Navy; ; ; ; Post–World War II; ; ; ; Argentine Navy; ; ; ; Royal Ceylon Navy; (later, the Sri Lanka Navy); ; ; Chilean Navy; ; ; ; Royal Danish Navy; ; ; ; Dominican Navy; ; ; ; Egyptian Navy; ; ; ; Indian Navy; ; ; ; Israeli Navy; ; ; ; Royal Moroccan Navy; ; ; ; Myanmar Navy; ; ; ; Royal New Zealand Navy; ; ; ; Royal Norwegian Navy; ; ; ; Pakistan Navy; ; ; ; Peruvian Navy; ; ; ; Portuguese Navy; ; ; ; ;
Succeeded by:	; Loch class;
Subclasses:	; RN group I, RN group II, RAN group I, RAN group II, RCN group
; In commission:;	; 1942
Planned:	; 30
Completed:	; 151
Cancelled:	; 2
Active:	; ; 1 as training ship; ; 1 converted to yacht; ; ;
Lost:	; ; 5 World War II; ; ; 2 Suez Crisis; ; ; 10 expended; ; ;
Preserved:	; 2
General characteristics RN group I
Displacement:	; ; 1,370 long tons (1,390 t; 1,530 short tons); ; 1,830 long tons (1,860 t; 2,050 short tons) (deep load); ; ;
Length:	; ; 283 ft (86.3 m) p/p; ; ; 301.25 ft (91.8 m)o/a; ; ; ;
Beam:	; 36 ft 6 in (11.1 m)
Draught:	; 9 ft (2.7 m); 13 ft (4.0 m) (deep load)
Propulsion:	; ; 2 × Admiralty 3-drum boilers, 2 shafts, reciprocating vertical triple expansion, 5,500 ihp (4,100 kW); ; (except Cam, Chelmer, Ettrick, Halladale, Helmsdale, and Tweed; Parsons single reduction steam turbines, 6,500 shp (4,800 kW); ; ;
Speed:	; ; 20 knots (37 km/h; 23 mph); ; 20.5 knots (38.0 km/h; 23.6 mph) (turbine ships); ; ;
Range:	; 7,200 nautical miles (13,300 km; 8,300 mi) at 12 knots (22 km/h; 14 mph) with;440 long tons (450 t; 490 short tons) oil fuel
Complement:	; 107
Armament:	; ; 2 × QF 4 in (102 mm) /40 Mk.XIX guns, single mounts CP Mk.XXIII; ; Up to 10 × QF 20 mm Oerlikon A/A on twin mounts Mk.V and single mounts Mk.III; ; 1 × Hedgehog 24 spigot A/S projector; ; 8 x depth charge throwers, 2 x rails, Up to 150 depth charges; ; ; ;
General characteristics (RN group II)
Range:	; 646 long tons (656 t; 724 short tons) oil fuel; 7,500 nautical miles (13,890 km) at 15 knots (27.8 km/h)
Notes:	; Other data as per RN group I
General characteristics (RCN group)
Displacement:	; ; 1,445 long tons (1,468 t; 1,618 short tons); ; 2,110 long tons (2,140 t; 2,360 short tons) (deep load); ; ;
Range:	; 646 long tons (656 t; 724 short tons) oil fuel; 7,500 nautical miles (13,890 km) at 15 knots (27.8 km/h)
Complement:	; 157
Armament:	; ; 2 × QF 4-inch (101.6 mm) XVI guns on twin mount HA/LA Mk.XIX; ; 1 × QF 12-pdr 12 cwt (3-inch (76.20 mm)) Mk. V gun on mounting HA/LA Mk.IX (not all ships); ; 8 × 20 mm QF Oerlikon A/A on twin mounts Mk.V; ; 1 × Hedgehog 24 spigot A/S projector; ; Up to 150 depth charges; ; ; ;
Notes:	; Other data as per RN group I
General characteristics (RAN group I)
Displacement:	; ; 1,420 long tons (1,440 t; 1,590 short tons); ; 2,020 long tons (2,050 t; 2,260 short tons) (deep load); ; ;
Range:	; 500 long tons (510 t; 560 short tons) oil fuel; 5,180 nautical miles (9,593 km) at 12 knots (22.2 km/h)
Complement:	; 140
Armament:	; ; 2 × QF 4-inch (101.6 mm) Mk.XVI guns, single mounts HA/LA Mk.XX; ; 8 × QF 20 mm Oerlikon, single mounts Mk.III, later;; ; ; 3 × QF 40 mm Bofors, single mounts Mk.VII; ; 4 × QF 20 mm Oerlikon, twin mounts Mk.V; ; ; 1 × Hedgehog 24 spigot A/S projector; ; Up to 50 depth charges; ; ; ;
Notes:	; Other data as per RN group I
General characteristics (RAN group II)
Displacement:	; ; 1,545 long tons (1,570 t; 1,730 short tons); ; 2,185 long tons (2,220 t; 2,447 short tons); ; ;
Complement:	; 177
Armament:	; ; 4 × QF 4-inch (101.6 mm) Mk.XVI guns, twin mounts HA/LA Mk.XIX; ; 3 × QF 40 mm Bofors, single mounts Mk.VII; ; 4 × QF 20 mm Oerlikon, twin mounts Mk.V; ; 1 × Hedgehog 24 spigot A/S projector; ; Up to 50 depth charges; ; ; ;
Notes:	; Other data as per RAN group I

The River class was a class of 151 frigates launched between 1941 and 1944 for use as anti-submarine convoy escorts in the North Atlantic. The majority served with the Royal Navy (RN) and Royal Canadian Navy (RCN), with some serving in the other Allied navies: the Royal Australian Navy (RAN), the Free French Navy (FFN), the Royal Netherlands Navy and, post-war, the South African Navy (SAN).

The first orders were placed by the Royal Navy in 1940, and the vessels were named for rivers in the United Kingdom, giving name to the class. In Canada, they were named for towns and cities, though they kept the same designation.^[1] Originally called a "twin-screw corvette", the name "frigate" was suggested by Vice-Admiral Percy Nelles of the Royal Canadian Navy.^[2] Canada originally ordered the construction of 33 frigates in October 1941.^[1]^[2] The design was too big for the locks on the Lachine Canal so it was not built by the shipyards on the Great Lakes and therefore all the frigates built in Canada were built in dockyards along the West Coast or along the St. Lawrence River below Montreal.^[2] In all, Canada ordered the construction of 70 frigates, including ten for the Royal Navy, which transferred two to the United States Navy.^[1] Twelve were built in Australia for the RAN (four to a modified design).

After World War II, they found employment in many other navies the world over; several RCN ships were sunk as breakwaters. One, HMCS Stormont, was purchased by Aristotle Onassis and converted into the luxury yacht Christina O.

Design

Overhead view of USS Natchez

The River-class ships were designed by naval engineer William Reed, of Smith's Dock Company of South Bank-on-Tees, to have the endurance and anti-submarine capabilities of the Black Swan-class sloops, while being quick and cheap to build in civil dockyards using the machinery (e.g. reciprocating steam engines instead of turbines) and construction techniques pioneered in the building of the Flower-class corvettes. Its purpose was to improve on the convoy escort classes in service with the Royal Navy at the time, including the Flower class.

Improvements over the corvette design included improved accommodation which was markedly better. The twin engines gave only 3 knots (3 mph; 6 km/h) more speed, but extended the range of the ship to nearly double that of a corvette, to 7,200 nmi (8,286 mi; 13,334 km) at 12 knots (14 mph; 22 km/h).^[2] Among other lessons applied to the design was armament better designed to combat U-boats, including a twin 4 in (102 mm) mount forward and 12-pounder (76 mm (3 in)) aft.^[1] Fifteen Canadian frigates were initially fitted with a single 4 in (102 mm) gun forward, but with the exception of HMCS Valleyfield, they were all eventually upgraded to the twin mount.^[2] For underwater targets, it was equipped with a Hedgehog anti-submarine mortar with depth charge rails and four side-mounted throwers aft for a 10-charge pattern (some had 8 throwers for a 14-charge pattern for a brief period until this was abandoned).^[1]

River-class frigates were the first Royal Canadian Navy warships to carry the 147B Sword horizontal fan-beam active sonar transmitter, in addition to the regular ASDIC. This allowed the ship to maintain contact with targets even while firing, unless a target was struck. Improved radar and radio direction-finding equipment improved the RCN's ability to find and track enemy submarines over previous classes.^[1]

The River-class design was used as the basis for the United States Navy's Tacoma class (which served in the Royal Navy as the Colony class), and the hull design was later elaborated into the Loch class, and subsequently the Bay class.

Ships in class

Two hundred forty-three frigates were built for seven navies during World War II.

Vessels lost in action

River class ships lost to enemy action
Ship	Date	Fate
HMS Cam	1944	Mined. Towed to port and declared a total loss.
HMCS Chebogue	4 October 1944	Torpedoed and badly damaged by U-1227 while escorting convoy ONS-33. Towed to port and declared a total loss.
HMS Cuckmere	11 December 1943	Torpedoed and badly damaged by U-223 off Algeria. Towed to port and declared a total loss.
HMS Itchen	23 September 1943	Torpedoed and sunk by U-666 at 53°25′N 39°42′W / 53.417°N 39.700°W / 53.417; -39.700.
HMS Lagan	20 September 1943	Torpedoed and badly damaged by U-270. Towed to port and declared a total loss.
HMCS Magog	14 October 1944	Torpedoed and badly damaged by U-1223 while escorting convoy ONS-33G. Towed to port and declared a total loss.
HMS Mourne	15 June 1944	Torpedoed and sunk by U-767 at 49°35′N 05°30′W / 49.583°N 5.500°W / 49.583; -5.500.
HMS Teme	29 March 1945	Torpedoed and badly damaged by U-315. Towed to port and declared a total loss.
HMS Tweed	7 January 1944	Torpedoed and sunk by U-305 at 48°18′N 21°19′W / 48.300°N 21.317°W / 48.300; -21.317.
HMCS Valleyfield	7 May 1944	Torpedoed and sunk by U-548 at 46°03′N 52°24′W / 46.050°N 52.400°W / 46.050; -52.400.

Survivors

On display in Brisbane, Australia is HMAS Diamantina, the last complete River-class frigate, preserved at the Queensland Maritime Museum.

HMCS Stormont served as a convoy escort during the Battle of the Atlantic and was present at the D-Day landings.^[3] In 1947, Greek shipowner Aristotle Onassis purchased her for scrap value and converted her into a luxurious superyacht named Christina O, after his daughter. The vessel is now owned by John Paul Nicolaou, who lets the yacht for elite charters and cruises.

SLNS Gajabahu, formerly HMCS Hallowell served as a convoy escort during World War II and later transferred to the Israeli Navy and then the Royal Ceylon Navy, which later became the Sri Lankan Navy. She was withdrawn from active duty in 1980 and is now used as a training ship by Sri Lanka.

UBS Mayu, formerly HMS Fal, is preserved in Seikkyi, Myanmar.

In fiction

"HMS Saltash" was a fictional River class frigate in Nicholas Monsarrat's 1951 book The Cruel Sea. (In the 1953 Jack Hawkins film version she is called "HMS Saltash Castle", and was played by the corvette HMS Portchester Castle.)

HMCS New Glasgow played the fictional frigate "HMS Rockhampton" in the 1955 John Wayne film The Sea Chase. (She had just been recommissioned as a Prestonian class upgrade of the Canadian River-class frigate, after ten years in reserve.)

"HMS Nairn" was a fictional River-class frigate in Alistair MacLean's 1955 book HMS Ulysses.

References

^ ^a^b^c^d^e^f "Fact Sheet No. 21 - Canadian River Class Frigates". Retrieved 3 April 2014..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output q{quotes:"""""""'""'"}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-limited a,.mw-parser-output .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}

^ ^a^b^c^d^e Macpherson, Ken (1989). Frigates of the Royal Canadian Navy 1943–1974. Lewiston, New York: Vanwell Publishing. pp. 6–7, 15. ISBN 0-920277-22-5.

^ "Canadian Participation on D-Day and In The Battle of Normandy". National Defence and the Canadian Forces. 7 June 2010. Archived from the original on 3 July 2004.

Bibliography

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. OCLC 67375475.

Lavery, Brian (2006). River-Class Frigates and the Battle of the Atlantic: A Technical and Social History. London: National Maritime Museum. ISBN 0-948065-73-7.

Lenton, H. T. (1998). British & Empire Warships of the Second World War. Annapolis, Maryland: Naval Institute Press. ISBN 1-55750-048-7.

Marriott, Leo (1983). Royal Navy Frigates 1945–1983. Ian Allan. ISBN 0-7110-1322-5.

External links

Convoy escort movements for River-class frigates

[WarMuseum-1] "Fact Sheet No. 21 - Canadian River Class Frigates". Retrieved 3 April 2014..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output q{quotes:"""""""'""'"}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-limited a,.mw-parser-output .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}

[Macpherson2-2] Macpherson, Ken (1989). Frigates of the Royal Canadian Navy 1943–1974. Lewiston, New York: Vanwell Publishing. pp. 6–7, 15. ISBN 0-920277-22-5.

[3] "Canadian Participation on D-Day and In The Battle of Normandy". National Defence and the Canadian Forces. 7 June 2010. Archived from the original on 3 July 2004.

[4] Transferred to Pakistan post-partition and served as PNS Dhanush.

[5] Transferred to Pakistan post-partition and served as PNS Shamsher.

[6] Renamed as INS Kukri post republic.

[7] Renamed as INS Bengal post republic.

[8] Renamed as INS Hooghly post republic.

[9] Renamed as INS Tir post republic.

[10] Transferred to Indian Coast Guard in 1978.

[11] Transferred to Indian Coast Guard in 1978.

[12] Transferred to Pakistan post-partition and served as PNS Jhelum.

[13] Transferred to Pakistan post-partition and served as PNS Sind.

[14] Renamed as INS Kaveri post republic.

[15] Renamed as INS Sutlej post republic.

[16] Renamed as INS Jumuna post republic.

[17] Renamed as INS Krisna post republic.

[18] Transferred to Pakistan post-partition and served as PNS Karsaz.

v t e Prestonian-class frigates
Royal Canadian Navy	Antigonish Beacon Hill Buckingham Cap de la Madeleine Fort Erie Inch Arran Jonquiere La Hulloise Lanark Lauzon New Glasgow New Waterford Outremont Penetang Prestonian St. Catharines St. Stephen Ste. Therese Stettler Stone Town Sussexvale Swansea Toronto Victoriaville / Granby
Royal Norwegian Navy	Draug (ex-Penetang) Garm / Valkyrien (ex-Toronto) Troll / Horten (ex-Prestonian)
Preceded by: River class Followed by: Halifax class
List of frigates of the Royal Canadian Navy

v t e British naval ship classes of the Second World War
Aircraft carriers	Courageous Eagle Ark Royal Illustrious Implacable Audacious^C Malta^X
Light aircraft carriers	Argus Hermes Unicorn Colossus Majestic^C Centaur^C
Escort carriers	Archer^AV Audacity^V Avenger^AV Attacker^A Ruler^A Activity^V Pretoria Castle^V Nairana^V
Battleships	Queen Elizabeth Revenge Nelson King George V Lion^X Vanguard^C
Battlecruisers	Renown HMS Hood
Heavy cruisers	Hawkins County York
Light cruisers	C Danae Emerald Leander Arethusa Town Dido Crown Colony Minotaur Neptune^X Minotaur (1947)^X
Destroyer leaders	Shakespeare Scott
Destroyers	R S V & W Town^A Ambuscade Amazon A & B C & D E & F G & H I Tribal J, K & N Hunt L & M O & P Q & R S & T U & V W & Z C Battle Weapon^C G^X Daring^C,P
Frigates	River Captain^A Colony^A Loch Bay
Corvettes	Flower Castle
Sloops	24 Bridgewater Hastings Banff^A Shoreham Grimsby Kingfisher Bittern Egret Black Swan
Minelayers	Adventure Abdiel Plover Linnet Agamemnon^V Menestheus^V Port Napier^V Port Quebec^V Southern Prince^V Teviot Bank^V
Minesweepers	Hunt Halcyon Bangor Auk^A Algerine Cybele
Submarines	H L Odin Parthian Rainbow S River Grampus T U P611 V Amphion X XE
Coastal	Harbour Defence Motor Launch Fairmile B motor launch Motor Torpedo Boat Motor Gun Boat Steam Gun Boat Insect-class gunboat Dragonfly-class river gunboat Type Two 63 ft HSL
Other	Trawlers Isles Portuguese Tree Monitors Erebus Roberts Seaplane carriers Pegasus Albatross Merchant aircraft carriers Fighter catapult ships Armed merchant cruisers Ocean boarding vessels
A American built X Cancelled C Completed after the war C,P Laid down and completed after the war V Conversions

v t e United States naval ship classes of World War II
Aircraft carriers	Lexington Ranger^S Yorktown Wasp^S Essex Midway^C
Light aircraft carriers	Independence Saipan^C
Escort carriers	Long Island Charger Bogue Sangamon Casablanca Commencement Bay
Battleships	Wyoming New York Nevada Pennsylvania New Mexico Tennessee Colorado North Carolina South Dakota Iowa Montana^X
Large cruisers	Alaska
Heavy cruisers	Pensacola Northampton Portland New Orleans Wichita^S Baltimore Oregon City^C Des Moines^C
Light cruisers	Omaha Brooklyn St. Louis Atlanta Cleveland Fargo^C Juneau^C Worcester^C
Gunboats	Asheville Tulsa Dubuque Plymouth^S Williamsburg^S St. Augustine^S Vixen^S Erie
Destroyers	Sampson Caldwell Wickes Clemson Farragut Porter Mahan Gridley Bagley Somers Benham Sims Benson Gleaves Fletcher Allen M. Sumner Robert H. Smith Gearing
Destroyer escorts	Evarts Buckley Cannon Edsall Rudderow John C. Butler
Patrol frigates	Asheville Tacoma
Patrol boats	Action PT boat
Minesweepers	Lapwing Raven Auk Eagle^S Hawk Admirable
Submarines	O R S Barracuda Argonaut^S Narwhal Dolphin^S Cachalot Porpoise Salmon Sargo Tambor Mackerel Gato Balao Tench
Tankers	T1 tanker T2 tanker T3 tanker
Minelayers	Camanche Class Chimo Class Other minelayers
Cargo	Liberty Victory Haskell Andromeda Arcturus Artemis Tolland Alstede Aldebaran Adria Acubens Arctic Denebola Hyades Mizar
S Single ship of class C Completed after the war X Cancelled

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Wsrtjtyk

River-class frigate

Contents

Design

Ships in class

Vessels lost in action

Survivors

In fiction

See also

References

Bibliography

External links

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Class overview
HMS Swale
Operators:	World War II: Royal Navy Royal Australian Navy Royal Canadian Navy Free French Naval Forces Royal Netherlands Navy South African Navy United States Navy Post–World War II Argentine Navy Royal Ceylon Navy; (later, the Sri Lanka Navy) Chilean Navy Royal Danish Navy Dominican Navy Egyptian Navy Indian Navy Israeli Navy Royal Moroccan Navy Myanmar Navy Royal New Zealand Navy Royal Norwegian Navy Pakistan Navy Peruvian Navy Portuguese Navy
Succeeded by:	Loch class
Subclasses:	RN group I, RN group II, RAN group I, RAN group II, RCN group
In commission:	1942
Planned:	30
Completed:	151
Cancelled:	2
Active:	1 as training ship 1 converted to yacht
Lost:	5 World War II 2 Suez Crisis 10 expended
Preserved:	2
General characteristics RN group I
Displacement:	1,370 long tons (1,390 t; 1,530 short tons) 1,830 long tons (1,860 t; 2,050 short tons) (deep load)
Length:	283 ft (86.3 m) p/p 301.25 ft (91.8 m)o/a
Beam:	36 ft 6 in (11.1 m)
Draught:	9 ft (2.7 m); 13 ft (4.0 m) (deep load)
Propulsion:	2 × Admiralty 3-drum boilers, 2 shafts, reciprocating vertical triple expansion, 5,500 ihp (4,100 kW) (except Cam, Chelmer, Ettrick, Halladale, Helmsdale, and Tweed; Parsons single reduction steam turbines, 6,500 shp (4,800 kW)
Speed:	20 knots (37 km/h; 23 mph) 20.5 knots (38.0 km/h; 23.6 mph) (turbine ships)
Range:	7,200 nautical miles (13,300 km; 8,300 mi) at 12 knots (22 km/h; 14 mph) with;440 long tons (450 t; 490 short tons) oil fuel
Complement:	107
Armament:	2 × QF 4 in (102 mm) /40 Mk.XIX guns, single mounts CP Mk.XXIII Up to 10 × QF 20 mm Oerlikon A/A on twin mounts Mk.V and single mounts Mk.III 1 × Hedgehog 24 spigot A/S projector 8 x depth charge throwers, 2 x rails, Up to 150 depth charges
General characteristics (RN group II)
Range:	646 long tons (656 t; 724 short tons) oil fuel; 7,500 nautical miles (13,890 km) at 15 knots (27.8 km/h)
Notes:	Other data as per RN group I
General characteristics (RCN group)
Displacement:	1,445 long tons (1,468 t; 1,618 short tons) 2,110 long tons (2,140 t; 2,360 short tons) (deep load)
Range:	646 long tons (656 t; 724 short tons) oil fuel; 7,500 nautical miles (13,890 km) at 15 knots (27.8 km/h)
Complement:	157
Armament:	2 × QF 4-inch (101.6 mm) XVI guns on twin mount HA/LA Mk.XIX 1 × QF 12-pdr 12 cwt (3-inch (76.20 mm)) Mk. V gun on mounting HA/LA Mk.IX (not all ships) 8 × 20 mm QF Oerlikon A/A on twin mounts Mk.V 1 × Hedgehog 24 spigot A/S projector Up to 150 depth charges
Notes:	Other data as per RN group I
General characteristics (RAN group I)
Displacement:	1,420 long tons (1,440 t; 1,590 short tons) 2,020 long tons (2,050 t; 2,260 short tons) (deep load)
Range:	500 long tons (510 t; 560 short tons) oil fuel; 5,180 nautical miles (9,593 km) at 12 knots (22.2 km/h)
Complement:	140
Armament:	2 × QF 4-inch (101.6 mm) Mk.XVI guns, single mounts HA/LA Mk.XX 8 × QF 20 mm Oerlikon, single mounts Mk.III, later; 3 × QF 40 mm Bofors, single mounts Mk.VII 4 × QF 20 mm Oerlikon, twin mounts Mk.V 1 × Hedgehog 24 spigot A/S projector Up to 50 depth charges
Notes:	Other data as per RN group I
General characteristics (RAN group II)
Displacement:	1,545 long tons (1,570 t; 1,730 short tons) 2,185 long tons (2,220 t; 2,447 short tons)
Complement:	177
Armament:	4 × QF 4-inch (101.6 mm) Mk.XVI guns, twin mounts HA/LA Mk.XIX 3 × QF 40 mm Bofors, single mounts Mk.VII 4 × QF 20 mm Oerlikon, twin mounts Mk.V 1 × Hedgehog 24 spigot A/S projector Up to 50 depth charges
Notes:	Other data as per RAN group I