The Flower class was not considered acceptable for mid-Atlantic sailing and was only used on Atlantic convoy duty out of need.

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).

[4] 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).

[6] 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.

[3] Renamed Huntsville after a community in northern Ontario, the corvette was commissioned on 6 June 1944 with the pennant number K499.

She was then ordered to act as a local escort, protecting a convoy travelling from St. John's to New York City.

[2] Belle Isle II was hit by the merchant vessel Holmside on Lake Saint Pierre while at anchor.

No casualties were involved, however the ship was a constructive total loss and was later salvaged by towing the hulk to Portsmouth, Ontario on 2 November.