HMCS Calgary was a Royal Canadian Navy revised Flower-class corvette which took part in convoy escort duties during the Second World War.

[2][3][4] The "corvette" designation was created by the French as a class of small warships; the Royal Navy borrowed the term for a period but discontinued its use in 1877.

[8] Calgary was ordered 20 February 1941 as part of the Revised 1940-41 Flower class building program.

[10] After arriving at Halifax 28 December 1941, she was initially assigned to the Western Local Escort Force (WLEF).

[10] During that period, on 30 July 1942 Calgary rescued 71 survivors from the crew of the British merchant ship Pacific Pioneer that was sunk by U-132 southwest of Sable Island.

However, after arrival in the United Kingdom she developed severe mechanical problems which led to an extensive refit.

The warships of both groups were attacked by 14 Dornier Do 217s and 7 Junkers Ju 87s that were carrying a new weapon, the Henschel Hs 293 anti-ship guided missile.

[9] Later that year on 20 November 1943 Calgary, along with Nene and Snowberry, depth charged and sank U-536 northeast of the Azores at 43°50′N 19°39′W / 43.833°N 19.650°W / 43.833; -19.650.

[9] After the cessation of hostilities Calgary returned to Canada in May 1945 and was paid off from the RCN on 19 June 1945 at Sorel.