HMCS Prince Rupert was a River-class frigate that served with the Royal Canadian Navy during the Second World War.

[4] 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.

[5] 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.

[4] 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 the end the U-boat surfaced and Prince Rupert helped carry off the survivors, saving fourteen of the sinking submarine's crew.

She returned to active service with escort group EG 27, based out of Halifax and remained with them until June 1945, when she sailed for Esquimalt.

[2] Upon reaching Esquimalt, Prince Rupert underwent tropicalization refit in preparation for service in the southern Pacific Ocean.