[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.

On that day she was operating off Londonderry Port, Northern Ireland when the snorkel of a U-boat was observed near the ship's bow.

The U-boat, later revealed to be U-1003[7] quickly dived while New Glasgow limped to Londonderry Port with a broken propeller and other hull damage.

Two days later, on 23 March 1945, the U-boat was scuttled in the Northern Channel a few miles north of Inistrahull Beacon (Malin Head), Ireland.

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

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.

[14] From January to March 1961, Sussexvale, New Glasgow and Beacon Hill performed a training cruise to the South Pacific, visiting Hawaii, Fiji, New Zealand, Australia and Samoa.