HMCS Miramichi (MCB 163)

The Bay class were designed and ordered as replacements for the Second World War-era minesweepers that the Royal Canadian Navy operated at the time. Similar to the Ton-class minesweeper, they were constructed of wood planking and aluminum framing.^[2][3]

Displacing 390 long tons (400 t) standard at 412 long tons (419 t) at deep load, the minesweepers were 152 ft (46 m) long with a beam of 28 ft (8.5 m) and a draught of 8 ft (2.4 m).^[2][3] They had a complement of 38 officers and ratings.^{[2][note 1]}

The Bay-class minesweepers were powered by two GM 12-cylinder diesel engines driving two shafts creating 2,400 brake horsepower (1,800 kW). This gave the ships a maximum speed of 16 knots (30 km/h; 18 mph) and a range of 3,290 nautical miles (6,090 km; 3,790 mi) at 12 knots (22 km/h; 14 mph).^[3][4] The ships were armed with one 40 mm Bofors gun and were equipped with minesweeping gear.^[2][3]

Ordered as a replacement for sister ship, Miramichi (MCB 150) which had been transferred to the French Navy in 1954, the ship's keel was laid down on 2 February 1956 by Victoria Machinery Depot at their yard in Victoria, British Columbia. Named for a bay located in New Brunswick, Miramichi was launched on 22 February 1957. The ship was commissioned on 29 October 1957.^[5]

After commissioning, the minesweeper joined Training Group Pacific on the West Coast of Canada.^[5] In 1972, the class was redesignated patrol escorts.^[2] The vessel remained a part of the unit until being paid off on 16 December 1998.^[5] Colledge claims the vessel was paid off in October 1998.^[6]

• Arbuckle, J. Graeme (1987). Badges of the Canadian Navy. Halifax, Nova Scotia: Nimbus Publishing. ISBN 0-920852-49-1.
• Colledge, J. J.; Warlow, Ben (2006) [1969]. Ships of the Royal Navy: The Complete Record of All Fighting Ships of the Royal Navy from the 15th Century to the Present (3rd Rev ed.). London: Chatham Publishing. ISBN 978-1-86176-281-8. OCLC 67375475.
• Gardiner, Robert; Chumbley, Stephen; Budzbon, Przemysław, eds. (1995). Conway's All the World's Fighting Ships 1947–1995. Annapolis, Maryland: Naval Institute Press. ISBN 1-55750-132-7.
• Macpherson, Ken; Barrie, Ron (2002). The Ships of Canada's Naval Forces 1910–2002 (Third ed.). St. Catharines, Ontario: Vanwell Publishing. ISBN 1-55125-072-1.
• Moore, John, ed. (1981). Jane's Fighting Ships, 1981–1982. New York: Jane's Information Group. ISBN 0-531-03977-3.