HMCS Whitethroat was a controlled minelayer based on the Isles-class naval trawler constructed for Canada in the United Kingdom during World War II.

The ship was powered by steam provided by one cylindrical boiler to a triple expansion engine rated at 850 indicated horsepower (630 kW) with a maximum speed of 12.5 knots (23.2 km/h; 14.4 mph).

[2] During World War II, the Royal Canadian Navy (RCN) sought to provide the port of Halifax, Nova Scotia with a defence of controlled minefields.

[2][5] As an auxiliary vessel, Whitethroat was used to repair undersea telegraph cables and in 1950, served as a platform for oceanographic work for the Naval Research Establishment.

[2][6] Once again a mine and loop layer, Whitethroat remained in this service until 30 September 1954 when the ship was paid off and returned to being a CNAV after the arrival of HMCS Bluethroat.