The River class was a

class Class or The Class may refer to: Common uses not otherwise categorized * Class (biology), a taxonomic rank * Class (knowledge representation), a collection of individuals or objects * Class (philosophy), an analytical concept used differentl ...

of 151 frigates launched between 1941 and 1944 for use as anti-submarine

convoy A convoy is a group of vehicles, typically motor vehicles or ships, traveling together for mutual support and protection. Often, a convoy is organized with armed defensive support and can help maintain cohesion within a unit. It may also be used ...

escorts in the North Atlantic. The majority served with the

Royal Navy The Royal Navy (RN) is the United Kingdom's naval warfare force. Although warships were used by English and Scottish kings from the early medieval period, the first major maritime engagements were fought in the Hundred Years' War against ...

and

Royal Canadian Navy The Royal Canadian Navy (RCN; french: Marine royale canadienne, ''MRC'') is the naval force of Canada. The RCN is one of three environmental commands within the Canadian Armed Forces. As of 2021, the RCN operates 12 frigates, four attack submar ...

(RCN), with some serving in the other Allied navies: the

Royal Australian Navy The Royal Australian Navy (RAN) is the principal naval force of the Australian Defence Force (ADF). The professional head of the RAN is Chief of Navy (CN) Vice Admiral Mark Hammond AM, RAN. CN is also jointly responsible to the Minister of ...

(RAN), the

Free French Naval Forces The Free French Naval Forces (french: Forces Navales Françaises Libres, or FNFL) were the naval arm of the Free French Forces during the Second World War. They were commanded by Admiral Émile Muselier. History In the wake of the Armistice a ...

, the Royal Netherlands Navy and, post-war, the South African Navy. The first orders were placed by the Royal Navy in 1940, and the vessels were named for rivers in the

United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the European mainland, continental mainland. It comprises England, Scotlan ...

, giving name to the class. In Canada, they were named for towns and cities, though they kept the same designation. Originally called a "twin-screw corvette", the name "frigate" was suggested by Vice-Admiral Percy W. Nelles of the Royal Canadian Navy. Canada originally ordered the construction of 33 frigates in October 1941. The design was too big for the locks on the

Lachine Canal The Lachine Canal ( in French) is a canal passing through the southwestern part of the Island of Montreal, Quebec, Canada, running 14.5 kilometres (9 miles) from the Old Port of Montreal to Lake Saint-Louis, through the boroughs of Lachine, ...

so it was not built by the shipyards on the

Great Lakes The Great Lakes, also called the Great Lakes of North America, are a series of large interconnected freshwater lakes in the mid-east region of North America that connect to the Atlantic Ocean via the Saint Lawrence River. There are five lak ...

and therefore all the frigates built in Canada were built in dockyards along the West Coast or along the

St. Lawrence River The St. Lawrence River (french: Fleuve Saint-Laurent, ) is a large river in the middle latitudes of North America. Its headwaters begin flowing from Lake Ontario in a (roughly) northeasterly direction, into the Gulf of St. Lawrence, connecting ...

below Montreal. In all, Canada ordered the construction of 70 frigates, including ten for the Royal Navy, which transferred two to the

United States Navy The United States Navy (USN) is the maritime service branch of the United States Armed Forces and one of the eight uniformed services of the United States. It is the largest and most powerful navy in the world, with the estimated tonnage ...

. Twelve were built in Australia for the RAN (four to a modified design). After

World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposing ...

, they found employment in many other navies the world over; several RCN ships were sunk as

breakwaters A breakwater is a permanent structure constructed at a coastal area to protect against tides, currents, waves, and storm surges. Part of a coastal management system, breakwaters are installed to minimize erosion, and to protect anchorages, h ...

. One, , was purchased by

Aristotle Onassis Aristotle Socrates Onassis (, ; el, Αριστοτέλης Ωνάσης, Aristotélis Onásis, ; 20 January 1906 – 15 March 1975), was a Greek-Argentinian shipping magnate who amassed the world's largest privately-owned shipping fleet and wa ...

and converted into the

luxury yacht A superyacht or megayacht is a large and luxurious pleasure vessel. There are no official or agreed upon definitions for such yachts, but these terms are regularly used to describe professionally crewed motor or sailing yachts, ranging from to ...

Design

The River-class ships were designed by naval engineer William Reed, of

Smith's Dock Company Smith's Dock Company, Limited, often referred to simply as Smith's Dock, was a British shipbuilding company. History The company was originally established by Thomas Smith who bought William Rowe's shipyard at St. Peter's in Newcastle upon Tyn ...

of South Bank-on-Tees, to have the endurance and anti-submarine capabilities of the

sloops A sloop is a sailboat with a single mast typically having only one headsail in front of the mast and one mainsail aft of (behind) the mast. Such an arrangement is called a fore-and-aft rig, and can be rigged as a Bermuda rig with triangular ...

, 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 s. Its purpose was to improve on the convoy escort classes in service with the

, including the Flower class. Improvements over the corvette design included markedly better accommodation. The twin engines gave only more speed but extended the range of the ship to nearly double that of a corvette to at . Among other lessons applied to the design was armament better designed to combat

U-boat U-boats were naval submarines operated by Germany, particularly in the First and Second World Wars. Although at times they were efficient fleet weapons against enemy naval warships, they were most effectively used in an economic warfare ro ...

s, including a twin mount forward and 12-pounder () aft. Fifteen Canadian frigates were initially fitted with one gun forward but with the exception of , they were all eventually upgraded to the twin mount. For underwater targets, it was equipped with a

Hedgehog A hedgehog is a spiny mammal of the subfamily Erinaceinae, in the eulipotyphlan family Erinaceidae. There are seventeen species of hedgehog in five genera found throughout parts of Europe, Asia, and Africa, and in New Zealand by introductio ...

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). 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 Sonar (sound navigation and ranging or sonic navigation and ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, measure distances ( ranging), communicate with or detect objects on ...

. This allowed the ship to maintain contact with targets even while firing, unless a target was struck. Better radar and radio direction-finding equipment improved the RCN's ability to find and track enemy submarines over previous classes. The River-class design was used as the basis for the

's (which served in the Royal Navy as the ); the hull design was later elaborated into the and subsequently the .

Ships in class

Two hundred and forty-three frigates were built in Britain, Canada and Australia for seven navies during World War II.

Vessels lost in action

Survivors

On display in

Brisbane Brisbane ( ) is the capital and most populous city of the Australian state of Queensland, and the third-most populous city in Australia and Oceania, with a population of approximately 2.6 million. Brisbane lies at the centre of the South ...

, Australia is , the last complete River-class frigate, preserved at the

Queensland Maritime Museum The Queensland Maritime Museum is located on the southern bank of the Brisbane River just south of the South Bank Parklands and Queensland Cultural Centre precinct of Brisbane, and close to the Goodwill Bridge. The museum was founded in 1971 ...

. served as a convoy escort during the Battle of the Atlantic and was present at the D-Day landings. In 1947, Greek shipowner

purchased her for scrap value and converted her into a luxurious

superyacht A superyacht or megayacht is a large and luxurious pleasure vessel. There are no official or agreed upon definitions for such yachts, but these terms are regularly used to describe professionally crewed motor or sailing yachts, ranging from to ...

named '' Christina O'', after his

daughter A daughter is a female offspring; a girl or a woman in relation to her parents. Daughterhood is the state of being someone's daughter. The male counterpart is a son. Analogously the name is used in several areas to show relations between group ...

. The vessel is now owned by John Paul Nicolaou, who lets the yacht for elite charters and cruises. , formerly 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. , formerly , is preserved in Seikkyi,

Myanmar Myanmar, ; UK pronunciations: US pronunciations incl. . Note: Wikipedia's IPA conventions require indicating /r/ even in British English although only some British English speakers pronounce r at the end of syllables. As John Wells explai ...

In fiction

"HMS ''Saltash''" was a fictional River class frigate in

Nicholas Monsarrat Lieutenant Commander Nicholas John Turney Monsarrat FRSL RNVR (22 March 19108 August 1979) was a British novelist known for his sea stories, particularly '' The Cruel Sea'' (1951) and ''Three Corvettes'' (1942–45), but perhaps known best i ...

's 1951 book ''The Cruel Sea''. (In the 1953

Jack Hawkins John Edward Hawkins, CBE (14 September 1910 – 18 July 1973) was an English actor who worked on stage and in film from the 1930s until the 1970s. One of the most popular British film stars of the 1950s, he was known for his portrayal of mil ...

film version A film adaptation is the transfer of a work or story, in whole or in part, to a feature film. Although often considered a type of derivative work, film adaptation has been conceptualized recently by academic scholars such as Robert Stam as a dia ...

she is called "HMS ''Saltash Castle''", and was played by the corvette .) played the fictional frigate "HMS ''Rockhampton''" in the 1955 John Wayne film ''

The Sea Chase ''The Sea Chase'' is a 1955 World War II drama film starring John Wayne and Lana Turner, and featuring David Farrar, Lyle Bettger, and Tab Hunter. It was directed by John Farrow from a screenplay by James Warner Bellah and John Twist based on ...

''. (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 Alistair Stuart MacLean ( gd, Alasdair MacGill-Eain; 21 April 1922 – 2 February 1987) was a 20th-century Scottish novelist who wrote popular thrillers and adventure stories. Many of his novels have been adapted to film, most notably '' The ...

's 1955 book ''HMS Ulysses''.

References

Bibliography

* * * *

External links

Convoy escort movements for River-class frigates
{{DEFAULTSORT:River Class Frigate Frigate classes North Atlantic convoys of World War II Ship classes of the Royal Navy Battle of the Atlantic Ship classes of the French Navy