HMCS Frontenac was a modified 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 platform for the 4-inch main gun was raised to minimize the amount of spray over it and to provide a better field of fire.

It was also connected to the wheelhouse by a wide platform that was now the base for the Hedgehog anti-submarine mortar that this version was armed with.

[2] After workups, Frontenac was assigned to the Royal Navy controlled convoy escort group EG 9 operating out of Derry.

She crossed the Atlantic in March 1944 with SC 154 and arrived just as the decision to replace the corvettes in the group with frigates had been made.

[2] Frontenac was paid off at Halifax, Nova Scotia 22 July 1945 and transferred to the War Assets Corporation.