The Prestonian-class ocean escort frigate was a class

Ship class

A ship class is a group of ships of a similar design. This is distinct from a ship-type, which might reflect a similarity of tonnage or intended use. For example, the is a nuclear aircraft carrier of the Nimitz class....

 of 21 frigate

Frigate

A frigate is any of several types of warship, the term having been used for ships of various sizes and roles over the last few centuries.In the 17th century, the term was used for any warship built for speed and maneuverability, the description often used being "frigate-built"...

s that served with the Royal Canadian Navy

Royal Canadian Navy

The history of the Royal Canadian Navy goes back to 1910, when the naval force was created as the Naval Service of Canada and renamed a year later by King George V. The Royal Canadian Navy is one of the three environmental commands of the Canadian Forces...

 from 1953-1967.

They were converted from mothballed s that had been placed in reserve following the end of World War II

World War II

World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

. The first vessel to be reactivated and undergo refit was which was recommissioned on 28 August 1953. The class did not use sequential pennant number

Pennant number

In the modern Royal Navy, and other navies of Europe and the Commonwealth, ships are identified by pennant numbers...

s.

Ships

Royal Canadian Navy

Ship	Builder	Laid Down	Launched	Commissioned	Paid Off	Fate
	Yarrows Ltd., Esquimalt Esquimalt, British Columbia The Township of Esquimalt is a municipality at the southern tip of Vancouver Island, in British Columbia, Canada. It is bordered to the east by the provincial capital, Victoria, to the south by the Strait of Juan de Fuca, to the west by Esquimalt Harbour and Royal Roads, to the northwest by the...	2 Oct 1943	10 Feb 1944	12 Oct 1957	30 Nov 1966	Formerly pennant K661.
	Yarrows Ltd., Esquimalt Esquimalt, British Columbia The Township of Esquimalt is a municipality at the southern tip of Vancouver Island, in British Columbia, Canada. It is bordered to the east by the provincial capital, Victoria, to the south by the Strait of Juan de Fuca, to the west by Esquimalt Harbour and Royal Roads, to the northwest by the...	16 Jul 1943	6 Nov 1943	21 Dec 1957	15 Sep 1967	Formerly pennant K407.
	Davie Shipbuilding & Repairing Co. Ltd. Davie Shipbuilding Davie Shipbuilding is a historic shipbuilding company located in Lauzon, Quebec. The facility has undergone restructuring and is currently operating as Davie Yards Incorporated.-History:... , Lauzon Lauzon, Quebec Lauzon is a former city in southern Quebec, Canada, located on the St. Lawrence River northeast of Lévis. Founded in 1910, Lauzon had a population of about 14,500 when it merged with Lévis in 1989...	11 Nov 1943	28 Apr 1944	25 Jun 1954	23 Mar 1965	Formerly pennant K685.
	Morton Engineering & Dry Dock Co., Quebec City Quebec City Quebec , also Québec, Quebec City or Québec City is the capital of the Canadian province of Quebec and is located within the Capitale-Nationale region. It is the second most populous city in Quebec after Montreal, which is about to the southwest...	5 Nov 1943	13 May 1944	7 Dec 1954	15 May 1965	Formerly pennant K663.
	Davie Shipbuilding & Repairing Co. Ltd. Davie Shipbuilding Davie Shipbuilding is a historic shipbuilding company located in Lauzon, Quebec. The facility has undergone restructuring and is currently operating as Davie Yards Incorporated.-History:... , Lauzon Lauzon, Quebec Lauzon is a former city in southern Quebec, Canada, located on the St. Lawrence River northeast of Lévis. Founded in 1910, Lauzon had a population of about 14,500 when it merged with Lévis in 1989...	3 Nov 1943	27 May 1944	17 Apr 1956	26 Mar 1965	Formerly pennant K670.
	Davie Shipbuilding & Repairing Co. Ltd. Davie Shipbuilding Davie Shipbuilding is a historic shipbuilding company located in Lauzon, Quebec. The facility has undergone restructuring and is currently operating as Davie Yards Incorporated.-History:... , Lauzon Lauzon, Quebec Lauzon is a former city in southern Quebec, Canada, located on the St. Lawrence River northeast of Lévis. Founded in 1910, Lauzon had a population of about 14,500 when it merged with Lévis in 1989...	25 Oct 1943	6 Jun 1944	23 Aug 1954	23 Jun 1965	Formerly pennant K667.
	Davie Shipbuilding & Repairing Co. Ltd. Davie Shipbuilding Davie Shipbuilding is a historic shipbuilding company located in Lauzon, Quebec. The facility has undergone restructuring and is currently operating as Davie Yards Incorporated.-History:... , Lauzon Lauzon, Quebec Lauzon is a former city in southern Quebec, Canada, located on the St. Lawrence River northeast of Lévis. Founded in 1910, Lauzon had a population of about 14,500 when it merged with Lévis in 1989...	26 Jan 1943	28 Oct 1943	20 Sep 1954	23 Sep 1966	Formerly pennant K318.
	Canadian Vickers, Montreal Montreal Montreal is a city in Canada. It is the largest city in the province of Quebec, the second-largest city in Canada and the seventh largest in North America...	10 Aug 1943	29 Oct 1943	9 Oct 1957	16 Jul 1965	Formerly pennant K668.
	Canadian Vickers, Montreal Montreal Montreal is a city in Canada. It is the largest city in the province of Quebec, the second-largest city in Canada and the seventh largest in North America...	25 Sep 1943	10 Dec 1943	15 Apr 1956	19 Mar 1965	Formerly pennant K669.
	Davie Shipbuilding & Repairing Co. Ltd. Davie Shipbuilding Davie Shipbuilding is a historic shipbuilding company located in Lauzon, Quebec. The facility has undergone restructuring and is currently operating as Davie Yards Incorporated.-History:... , Lauzon Lauzon, Quebec Lauzon is a former city in southern Quebec, Canada, located on the St. Lawrence River northeast of Lévis. Founded in 1910, Lauzon had a population of about 14,500 when it merged with Lévis in 1989...	2 Jul 1943	10 Jun 1944	12 Dec 1953	24 May 1963	Formerly pennant K371.
	Yarrows Ltd., Esquimalt Esquimalt, British Columbia The Township of Esquimalt is a municipality at the southern tip of Vancouver Island, in British Columbia, Canada. It is bordered to the east by the provincial capital, Victoria, to the south by the Strait of Juan de Fuca, to the west by Esquimalt Harbour and Royal Roads, to the northwest by the...	2 Dec 1942	23 Jun 1943	30 Jan 1954	30 Jan 1967	Formerly pennant K320.
	Yarrows Ltd., Esquimalt Esquimalt, British Columbia The Township of Esquimalt is a municipality at the southern tip of Vancouver Island, in British Columbia, Canada. It is bordered to the east by the provincial capital, Victoria, to the south by the Strait of Juan de Fuca, to the west by Esquimalt Harbour and Royal Roads, to the northwest by the...	17 Dec 1943	3 Jul 1943	31 Jan 1958	22 Dec 1966	Formerly pennant K321.
	Morton Engineering & Dry Dock Co., Quebec City Quebec City Quebec , also Québec, Quebec City or Québec City is the capital of the Canadian province of Quebec and is located within the Capitale-Nationale region. It is the second most populous city in Quebec after Montreal, which is about to the southwest...	18 Nov 1942	3 Jul 1943	2 Sep 1955	7 Jun 1965	Formerly pennant K322.
	Davie Shipbuilding & Repairing Co. Ltd. Davie Shipbuilding Davie Shipbuilding is a historic shipbuilding company located in Lauzon, Quebec. The facility has undergone restructuring and is currently operating as Davie Yards Incorporated.-History:... , Lauzon Lauzon, Quebec Lauzon is a former city in southern Quebec, Canada, located on the St. Lawrence River northeast of Lévis. Founded in 1910, Lauzon had a population of about 14,500 when it merged with Lévis in 1989...	22 Sep 1943	6 Jul 1944	1 Jun 1954	25 Jan 1956	Formerly pennant K676.
	Davie Shipbuilding & Repairing Co. Ltd. Davie Shipbuilding Davie Shipbuilding is a historic shipbuilding company located in Lauzon, Quebec. The facility has undergone restructuring and is currently operating as Davie Yards Incorporated.-History:... , Lauzon Lauzon, Quebec Lauzon is a former city in southern Quebec, Canada, located on the St. Lawrence River northeast of Lévis. Founded in 1910, Lauzon had a population of about 14,500 when it merged with Lévis in 1989...	20 Jul 1943	22 Jun 1944	22 Aug 1953	24 Apr 1956	Formerly pennant K662.
	Davie Shipbuilding & Repairing Co. Ltd. Davie Shipbuilding Davie Shipbuilding is a historic shipbuilding company located in Lauzon, Quebec. The facility has undergone restructuring and is currently operating as Davie Yards Incorporated.-History:... , Lauzon Lauzon, Quebec Lauzon is a former city in southern Quebec, Canada, located on the St. Lawrence River northeast of Lévis. Founded in 1910, Lauzon had a population of about 14,500 when it merged with Lévis in 1989...	18 May 1943	16 Oct 1943	21 Jan 1955	30 Jan 1967	Formerly pennant K366.
	Canadian Vickers, Montreal Montreal Montreal is a city in Canada. It is the largest city in the province of Quebec, the second-largest city in Canada and the seventh largest in North America...	31 May 1943	9 Oct 1943	2 Feb 1954	31 Aug 1966	Formerly pennant K681.
	Davie Shipbuilding & Repairing Co. Ltd. Davie Shipbuilding Davie Shipbuilding is a historic shipbuilding company located in Lauzon, Quebec. The facility has undergone restructuring and is currently operating as Davie Yards Incorporated.-History:... , Lauzon Lauzon, Quebec Lauzon is a former city in southern Quebec, Canada, located on the St. Lawrence River northeast of Lévis. Founded in 1910, Lauzon had a population of about 14,500 when it merged with Lévis in 1989...	15 Nov 1943	12 Jul 1944	8 Aug 1955	30 Nov 1966	Formerly pennant K683.
	Yarrows Ltd., Esquimalt Esquimalt, British Columbia The Township of Esquimalt is a municipality at the southern tip of Vancouver Island, in British Columbia, Canada. It is bordered to the east by the provincial capital, Victoria, to the south by the Strait of Juan de Fuca, to the west by Esquimalt Harbour and Royal Roads, to the northwest by the...	15 Jul 1942	19 Dec 1942	14 Nov 1957	14 Oct 1966	Formerly pennant K328.
	Davie Shipbuilding & Repairing Co. Ltd. Davie Shipbuilding Davie Shipbuilding is a historic shipbuilding company located in Lauzon, Quebec. The facility has undergone restructuring and is currently operating as Davie Yards Incorporated.-History:... , Lauzon Lauzon, Quebec Lauzon is a former city in southern Quebec, Canada, located on the St. Lawrence River northeast of Lévis. Founded in 1910, Lauzon had a population of about 14,500 when it merged with Lévis in 1989...	10 May 1943	18 Sep 1943	26 Nov 1953	14 Apr 1956	Formerly pennant K538.
	Davie Shipbuilding & Repairing Co. Ltd. Davie Shipbuilding Davie Shipbuilding is a historic shipbuilding company located in Lauzon, Quebec. The facility has undergone restructuring and is currently operating as Davie Yards Incorporated.-History:... , Lauzon Lauzon, Quebec Lauzon is a former city in southern Quebec, Canada, located on the St. Lawrence River northeast of Lévis. Founded in 1910, Lauzon had a population of about 14,500 when it merged with Lévis in 1989...	2 Dec 1943	23 Jun 1944	25 Sep 1959	Dec 1966	Formerly pennant K684. Decommissioned as a Prestonian-class frigate in Dec 1966 and recommissioned as diving tender HMCS Granby. Finally decommissioned on 31 Dec 1973.