The Bay-class minesweepers were a class of minesweepers operated by 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...

 (RCN) and Canadian Forces

Canadian Forces

The Canadian Forces , officially the Canadian Armed Forces , are the unified armed forces of Canada, as constituted by the National Defence Act, which states: "The Canadian Forces are the armed forces of Her Majesty raised by Canada and consist of one Service called the Canadian Armed Forces."...

 (CF) during the Cold War

Cold War

The Cold War was the continuing state from roughly 1946 to 1991 of political conflict, military tension, proxy wars, and economic competition between the Communist World—primarily the Soviet Union and its satellite states and allies—and the powers of the Western world, primarily the United States...

.

The class derives its name from bays in Canada and was designed by the RCN as a replacement for 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...

-era minesweepers. Fourteen were laid down in 1951–1952, however six were subsequently transferred to the French Navy

French Navy

The French Navy, officially the Marine nationale and often called La Royale is the maritime arm of the French military. It includes a full range of fighting vessels, from patrol boats to a nuclear powered aircraft carrier and 10 nuclear-powered submarines, four of which are capable of launching...

 in 1954. These ships were replaced by six of the same name in 1956–1957 but were assigned new pennant number

Pennant number

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

s.

They were reclassed in CF service as patrol escorts in 1972 and six vessels remained in service until the late 1990s, providing coastal surveillance and shiphandling experience for junior officers with Maritime Forces Pacific

Maritime Forces Pacific

In the Canadian Forces, Maritime Forces Pacific is responsible for the fleet and operations of the Royal Canadian Navy in the Pacific Ocean...

. The removal of the aft mounted minesweeping equipment in the 1970s allowed for the erection of additional sleeping spaces and a wash space for aspiring officers, unofficially known on all ships as "Dunk's Diner".

Ships

Ship	Original Pennant Number	Builder	Laid Down	Launched	Commissioned	Paid Off	Fate
	MCB 144	Port Arthur Shipbuilding, Port Arthur Port Arthur, Ontario Port Arthur was a city in Northern Ontario which amalgamated with Fort William and the townships of Neebing and McIntyre to form the city of Thunder Bay in January 1970. Port Arthur was the district seat of Thunder Bay District.- History :...	8 Jun 1951	21 Jun 1952	18 Jun 1954	30 Sep 1954	Sold to France as La Dieppoise in 1954, stricken 1985.
	MCB 164	Marine Industries Marine Industries Limited Marine Industries Limited was a Canadian ship building company, in Sorel, Quebec, with a shipyard located on the Richelieu river about 1 km from the St. Lawrence River. It employed up to 10,000 people during the post WWII boom.... , Sorel	20 Feb 1956	11 May 1957	12 Sep 1957
	MCB 156	Marine Industries Marine Industries Limited Marine Industries Limited was a Canadian ship building company, in Sorel, Quebec, with a shipyard located on the Richelieu river about 1 km from the St. Lawrence River. It employed up to 10,000 people during the post WWII boom.... , Sorel	4 Jun 1951	13 Jun 1952	1 Dec 1953	31 May 1954	Sold to France as La Bayonnaise in 1954, stricken 1976.
	MCB 160	Davie Shipbuilding 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 1955	17 Nov 1956	1 Aug 1957
	MCB 146	Victoria Machinery Depot Victoria Machinery Depot Victoria Machinery Depot Ltd. was a ship builder located in Victoria, British Columbia, Canada.This was a historic metalworks and shipyard in Victoria, Canada. From the late 1850s on, with the Fraser Canyon and Cariboo Gold Rushes British Columbia was dependent upon Californian supplies and ships... , Victoria Victoria, British Columbia Victoria is the capital city of British Columbia, Canada and is located on the southern tip of Vancouver Island off Canada's Pacific coast. The city has a population of about 78,000 within the metropolitan area of Greater Victoria, which has a population of 360,063, the 15th most populous Canadian...	8 Jun 1951	24 Apr 1952	2 Apr 1954	11 Sep 1957	Sold to Turkey as Tirebolu in 1957.
	MCB 147	Victoria Machinery Depot Victoria Machinery Depot Victoria Machinery Depot Ltd. was a ship builder located in Victoria, British Columbia, Canada.This was a historic metalworks and shipyard in Victoria, Canada. From the late 1850s on, with the Fraser Canyon and Cariboo Gold Rushes British Columbia was dependent upon Californian supplies and ships... , Victoria Victoria, British Columbia Victoria is the capital city of British Columbia, Canada and is located on the southern tip of Vancouver Island off Canada's Pacific coast. The city has a population of about 78,000 within the metropolitan area of Greater Victoria, which has a population of 360,063, the 15th most populous Canadian...	20 Jun 1951	12 Nov 1951	10 Dec 1953	31 Mar 1954	Sold to France as La Malouine in 1954, stricken 1977.
	MCB 162	Yarrows Shipbuilding, 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...	10 Jul 1956	26 Feb 1957	12 Dec 1957
	MCB 151	Victoria Machinery Depot Victoria Machinery Depot Victoria Machinery Depot Ltd. was a ship builder located in Victoria, British Columbia, Canada.This was a historic metalworks and shipyard in Victoria, Canada. From the late 1850s on, with the Fraser Canyon and Cariboo Gold Rushes British Columbia was dependent upon Californian supplies and ships... , Victoria Victoria, British Columbia Victoria is the capital city of British Columbia, Canada and is located on the southern tip of Vancouver Island off Canada's Pacific coast. The city has a population of about 78,000 within the metropolitan area of Greater Victoria, which has a population of 360,063, the 15th most populous Canadian...	24 Apr 1952	14 Apr 1953	3 Nov 1954	28 Feb 1964	Sold in 1964, becoming mercantile Greenpeace Two in 1966 and later Edgewater Fortune.
	MCB 145	Saint John Drydock and Shipbuilding, Saint John Saint John, New Brunswick City of Saint John , or commonly Saint John, is the largest city in the province of New Brunswick, and the first incorporated city in Canada. The city is situated along the north shore of the Bay of Fundy at the mouth of the Saint John River. In 2006 the city proper had a population of 74,043...	19 Jun 1951	9 Dec 1953	19 Mar 1954	31 Mar 1964	Sold to France as La Dunkerquoise in 1954, stricken 1984.
	MCB 159	Davie Shipbuilding 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...	7 Mar 1955	14 Jun 1956	27 Nov 1956
	MCB 143	Davie Shipbuilding 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...	21 Mar 1951	12 Nov 1951	5 Dec 1953	22 Aug 1957	Sold to Turkey as Trabzon in 1957.
	MCB 152	Yarrows Shipbuilding, 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 Aug 1951	12 Mar 1953	3 May 1954	28 Feb 1964	Sold into mercantile service.
	MCB 150	Saint John Drydock and Shipbuilding, Saint John Saint John, New Brunswick City of Saint John , or commonly Saint John, is the largest city in the province of New Brunswick, and the first incorporated city in Canada. The city is situated along the north shore of the Bay of Fundy at the mouth of the Saint John River. In 2006 the city proper had a population of 74,043...	13 Jun 1952	4 May 1954	30 Jul 1954	1 Oct 1964	Sold to France as La Lorientaise in 1954, stricken 1984.
	MCB 163	Victoria Machinery Depot Victoria Machinery Depot Victoria Machinery Depot Ltd. was a ship builder located in Victoria, British Columbia, Canada.This was a historic metalworks and shipyard in Victoria, Canada. From the late 1850s on, with the Fraser Canyon and Cariboo Gold Rushes British Columbia was dependent upon Californian supplies and ships... , Victoria Victoria, British Columbia Victoria is the capital city of British Columbia, Canada and is located on the southern tip of Vancouver Island off Canada's Pacific coast. The city has a population of about 78,000 within the metropolitan area of Greater Victoria, which has a population of 360,063, the 15th most populous Canadian...	2 Feb 1956	22 Feb 1957	29 Oct 1957
	MCB 149	Port Arthur Shipbuilding, Port Arthur Port Arthur, Ontario Port Arthur was a city in Northern Ontario which amalgamated with Fort William and the townships of Neebing and McIntyre to form the city of Thunder Bay in January 1970. Port Arthur was the district seat of Thunder Bay District.- History :...	14 Jun 1952	8 Aug 1953	15 Oct 1954	26 Feb 1964
	MCB 154	Kingston Shipbuilding, Kingston Kingston, Ontario Kingston, Ontario is a Canadian city located in Eastern Ontario where the St. Lawrence River flows out of Lake Ontario. Originally a First Nations settlement called "Katarowki," , growing European exploration in the 17th Century made it an important trading post...	29 Feb 1951	20 Jun 1953	16 Sep 1954	14 Feb 1964
	MCB 153	Canadian Vickers, Montreal	17 May 1951	17 Jul 1952	15 Dec 1953	31 Mar 1964	Sold to France as La Paimpolaise in 1954, stricken 1986.
	MCB 153	Port Arthur Shipbuilding, Port Arthur Port Arthur, Ontario Port Arthur was a city in Northern Ontario which amalgamated with Fort William and the townships of Neebing and McIntyre to form the city of Thunder Bay in January 1970. Port Arthur was the district seat of Thunder Bay District.- History :...	1 Sep 1955	27 Oct 1956	3 Oct 1957
	MCB 157	Davie Shipbuilding 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...	31 Jan 1952	31 Jul 1953	16 Jun 1954	21 Aug 1957	Sold to Turkey as Terme in 1957.
	MCB 148	Davie Shipbuilding 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...	17 Dec 1951	20 May 1953	4 Jun 1954	23 Aug 1957	Sold to Turkey as Tekirdag in 1957.