[5] 15 Canadian frigates were initially fitted with a single 4-inch gun forward but with the exception of HMCS Valleyfield, they were all eventually upgraded to the double mount.

[6] For underwater targets, the River-class frigate was equipped with a Hedgehog anti-submarine mortar and depth charge rails aft and four side-mounted throwers.

[5] River-class frigates were the first Royal Canadian Navy warships to carry the 147B Sword horizontal fan echo sonar transmitter in addition to the irregular ASDIC.

In October 1948, Antigonish joined the cruiser Ontario and destroyers Cayuga, Athabaskan, Crescent in sailing to Pearl Harbor, Hawaii; the largest deployment of the Royal Canadian Navy following the war.

[9] In January 1952, Beacon Hill and Antigonish deployed on a training cruise to South America along the Pacific coast, making several port visits.

[4] During service with the Fourth Canadian Escort Squadron she was fitted with a midship deckhouse to provide classroom and training facilities for officer candidates.

[11] In January 1960, Antigonish and three other Prestonian-class ships made a tour of South American ports, visiting San Diego, Balboa, the Galapagos Islands, Callao and Valparaíso, Talara and Long Beach.

In June 1960 the Fourth Canadian Escort Squadron performed a training tour of the Pacific, with stops at Yokohama, Japan, Midway Atoll and Pearl Harbor.