[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.

In preparation for service in the Pacific Ocean, Prestonian began a tropicalization refit at Halifax completing on 20 August 1945.

However the plans to send her to the Pacific had been cancelled and she was paid off 9 November and sold to Marine Industries Ltd.[2][3] Prestonian was reacquired by the RCN to undergo conversion to a Prestonian-class ocean escort as part of the need to expand the anti-submarine force within the navy.

[9] In April 1954, the First Canadian Escort Squadron deployed to Caribbean Sea for a training cruise, making several port visits.

[13] The frigate was paid off on 24 April 1956 and transferred to the Royal Norwegian Navy and renamed HNoMS Troll.