HMCS Drumheller was a Flower-class corvette that served with the Royal Canadian Navy during the Second World War.

[3][4][5] 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.

The second refit that Drumheller underwent took place at New York from mid-November 1943 until mid-January 1944 where her fo'c'sle was extended.

She was transferred to Newfoundland Command soon after and spent two months beginning in December 1941 as an ocean escort.

After completion of the repairs, she was assigned to Tobermory, the escort ship training site, for workups.

In May 1943 Drumheller as escort to Convoy HX 237 teamed with an RAF Sunderland and HMS Lagan to sink U-753.

Also during this time Drumheller was involved in the severe battle surrounding Convoys ONS 18/ON 202 in September 1943 which lost six merchant ships and three escorts.