HMCS ''Rockcliffe'' was a

reciprocating engine A reciprocating engine, also often known as a piston engine, is typically a heat engine that uses one or more reciprocating pistons to convert high temperature and high pressure into a rotating motion. This article describes the common featu ...

-powered built for the

Royal Canadian Navy The Royal Canadian Navy (RCN; french: Marine royale canadienne, ''MRC'') is the Navy, 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 s ...

during the Second World War. Following the war, the ship saw service as

training vessel A training ship is a ship used to train students as sailors. The term is mostly used to describe ships employed by navies to train future officers. Essentially there are two types: those used for training at sea and old hulks used to house class ...

before being scrapped in 1960.

Design and description

The reciprocating group displaced at standard load and at

deep load The displacement or displacement tonnage of a ship is its weight. As the term indicates, it is measured indirectly, using Archimedes' principle, by first calculating the volume of water displaced by the ship, then converting that value into wei ...

The ships measured

long overall __NOTOC__ Length overall (LOA, o/a, o.a. or oa) is the maximum length of a vessel's hull measured parallel to the waterline. This length is important while docking the ship. It is the most commonly used way of expressing the size of a ship, and ...

with a

beam Beam may refer to: Streams of particles or energy *Light beam, or beam of light, a directional projection of light energy **Laser beam *Particle beam, a stream of charged or neutral particles **Charged particle beam, a spatially localized grou ...

of . They had a draught of . The ships' complement consisted of 85 officers and ratings.Lenton, p. 261 The reciprocating ships had two vertical triple-expansion steam engines, each driving one shaft, using steam provided by two

Admiralty three-drum boiler Three-drum boilers are a class of water-tube boiler used to generate steam, typically to power ships. They are compact and of high evaporative power, factors that encourage this use. Other boiler designs may be more efficient, although bulkier, an ...

s. The engines produced a total of and gave a maximum speed of . They carried a maximum of of

fuel oil Fuel oil is any of various fractions obtained from the distillation of petroleum (crude oil). Such oils include distillates (the lighter fractions) and residues (the heavier fractions). Fuel oils include heavy fuel oil, marine fuel oil (MFO), bun ...

that gave them a range of at . The ''Algerine'' class was armed with a QF Mk V

anti-aircraft gun Anti-aircraft warfare, counter-air or air defence forces is the battlespace response to aerial warfare, defined by NATO as "all measures designed to nullify or reduce the effectiveness of hostile air action".AAP-6 It includes surface based, ...

Chesneau, p. 65 and four twin-gun mounts for Oerlikon 20 mm cannon. The latter guns were in short supply when the first ships were being completed and they often got a proportion of single mounts. By 1944, single-barrel

Bofors 40 mm Bofors 40 mm gun is a name or designation given to two models of 40 mm calibre anti-aircraft guns designed and developed by the Swedish company Bofors: *Bofors 40 mm L/60 gun - developed in the 1930s, widely used in World War II and into the 1990s ...

mounts began replacing the twin 20 mm mounts on a one for one basis. All of the ships were fitted for four throwers and two rails for

depth charge A depth charge is an anti-submarine warfare (ASW) weapon. It is intended to destroy a submarine by being dropped into the water nearby and detonating, subjecting the target to a powerful and destructive Shock factor, hydraulic shock. Most depth ...

s. Many Canadian ships omitted their sweeping gear in exchange for a 24-barrel Hedgehog spigot mortar and a stowage capacity for 90+ depth charges.

Construction and career

Named after

Rockliffe Park Rockliffe Park near Hurworth, County Durham, is Middlesbrough Football Club's training facility and sports complex. History of Rockliffe Park Early years (1863-1996) In 1863, Arthur Backhouse (a member of the Quaker banking family of Darlington ...

, a suburb of

Ottawa Ottawa (, ; Canadian French: ) is the capital city of Canada. It is located at the confluence of the Ottawa River and the Rideau River in the southern portion of the province of Ontario. Ottawa borders Gatineau, Quebec, and forms the core ...

, Ontario, ''Rockcliffe'' was

laid down Laying the keel or laying down is the formal recognition of the start of a ship's construction. It is often marked with a ceremony attended by dignitaries from the shipbuilding company and the ultimate owners of the ship. Keel laying is one o ...

on 23 December 1942 by Port Arthur Shipbuilding Co. Ltd. at

Port Arthur, Ontario Port Arthur was a city in Northern Ontario, Canada, located on Lake Superior. In January 1970, it amalgamated with Fort William and the townships of Neebing and McIntyre to form the city of Thunder Bay. Port Arthur had been the district seat of ...

. The ship was launched on 19 August 1943 and commissioned into the Royal Canadian Navy at Port Arthur on 30 September 1944.Macpherson & Barrie, p. 198 Following her commissioning, ''Rockcliffe'' sailed up 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 ...

Halifax, Nova Scotia Halifax is the capital and largest municipality of the Canadian province of Nova Scotia, and the largest municipality in Atlantic Canada. As of the 2021 Census, the municipal population was 439,819, with 348,634 people in its urban area. The ...

. She was sent to

Bermuda ) , anthem = "God Save the King" , song_type = National song , song = " Hail to Bermuda" , image_map = , map_caption = , image_map2 = , mapsize2 = , map_caption2 = , subdivision_type = Sovereign state , subdivision_name = , e ...

to work up and upon her return to Halifax in mid-December 1944, was assigned to the Western Escort Force for convoy escort duties in the

Battle of the Atlantic The Battle of the Atlantic, the longest continuous military campaign in World War II, ran from 1939 to the defeat of Nazi Germany in 1945, covering a major part of the naval history of World War II. At its core was the Allied naval blockade ...

. The minesweeper joined escort group W-6 with which she remained until June 1945 when it was disbanded. On 10 May 1945 she was part of the group that captured the

German Type IX submarine The Type IX U-boat was designed by Nazi Germany's ''Kriegsmarine'' in 1935 and 1936 as a large ocean-going submarine for sustained operations far from the home support facilities. Type IX boats were briefly used for patrols off the eastern Unit ...

. She escorted the submarine to Shelburne, Nova Scotia. ''Rockcliffe'' was paid off into reserve on 28 July 1945 at

Sydney, Nova Scotia Sydney is a former city and urban community on the east coast of Cape Breton Island in Nova Scotia, Canada within the Cape Breton Regional Municipality. Sydney was founded in 1785 by the British, was incorporated as a city in 1904, and dissolv ...

, she was then transferred to the west coast arriving at Esquimalt, British Columbia on 14 January 1946. On 3 March 1947, the minesweeper was recommissioned for use as a training ship. In 1948, the minesweeper was used for oceanographic duties. ''Rockcliffe'' was

paid off Ship commissioning is the act or ceremony of placing a ship in active service and may be regarded as a particular application of the general concepts and practices of project commissioning. The term is most commonly applied to placing a warship in ...

on 15 August 1950 for the final time. ''Rockcliffe'' was sold for scrap on 24 March 1960 and broken up at

Vancouver Vancouver ( ) is a major city in western Canada, located in the Lower Mainland region of British Columbia. As the List of cities in British Columbia, most populous city in the province, the 2021 Canadian census recorded 662,248 people in the ...

. After decommissioning the ship's bell was presented to the officer's mess at

CFB Rockcliffe Canadian Forces Base Rockcliffe (also CFB Rockcliffe) is a former Canadian Forces Base located in the eastern part of Ottawa, Ontario, now used for Ottawa/Rockcliffe Airport and the Canada Aviation and Space Museum. It was formerly known as CFB O ...

on 30 May 1967 and formed part of the chandelier.

References

Bibliography

* * * * *

External links

Haze Gray and Underway

ReadyAyeReady.com
{{DEFAULTSORT:Rockcliffe (J335) Algerine-class minesweepers of the Royal Canadian Navy Ships built in Ontario 1943 ships World War II minesweepers of Canada World War II escort ships of Canada

Design and description

Construction and career

See also

References

Bibliography

External links