[3] The River-class frigate was designed by William Reed of Smith's Dock Company of South Bank-on-Tees.

[5] The name "frigate" was suggested by Vice-Admiral Percy Nelles of the Royal Canadian Navy and was adopted later that year.

[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.

Therese was chosen to undergo conversion to a Prestonian-class ocean escort as part of the need to expand the anti-submarine force within the navy.

Therese was among the Canadian units that took part in one of the largest naval exercises since the Second World War off the coast of California.

Therese 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.

Therese was a member of the Fourth Canadian Escort Squadron based out of Esquimalt, British Columbia.

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