Before completion, the ship was transferred to the Royal Canadian Navy, renamed HMCS Humberstone, and served the rest of the war as a convoy escort.

Following the war, the corvette was sold for mercantile service, beginning as Taiwei in 1946 and ending as South Ocean in 1954.

Though the Admiralty would have preferred Loch-class frigates, the inability of many small shipyards to construct the larger ships required them to come up with a smaller vessel.

This powered one vertical triple expansion engine that drove one shaft, giving the ships a maximum speed of 16.5 knots (30.6 km/h; 19.0 mph).

[3] The ships carried 480 tons of oil giving them a range of 6,200 nautical miles (11,500 km; 7,100 mi) at 15 knots (28 km/h; 17 mph).

[5] The Type 147B was tied to the Squid anti-submarine mortar and would automatically set the depth on the fuses of the projectiles until the moment of firing.

[2] Renamed Humberstone after a community in southern Ontario, the corvette was commissioned on 6 September 1944 with the pennant number K497.

[10] She became South Ocean in 1954, owned by Korea Deep Sea Fishery Co Ltd and operating under a Korean flag.