Corvettes Canada - Convoy Veterans of WWII Tell Their True Stories

The Canadian escort group C 2 was comprised of the RCN destroyers Gatineau and Chaudiere, the frigate St. Catharines, the Corvettes Chilliwack and Fennel, and the RN destroyer Icarus. these six and the RN corvette Kenilworth castle combined to sing U-744 in the North Atlantic in a prolonged drama on March 5 and 6, 1944. At 32 hours, this the second-longest successful hunt of the war.
Chilliwack able seaman Ralph Chartrand recalls the action:

When the sub started to surface, everything that could shoot went into action and we fired all we could. While the crew of U-744 was jumping out of the conning tower, St. Catharines was closing in, but our captain outmanoeuvred Chilliwack in front to make sure that this was our sub. He gave the order "Prepare to ram," but soon the sub was empty, so we didn't ram. We lowered a lifeboat with a boarding party and they proceeded to U-744. While the lifeboat was tied to the sub, some members boarded the sub. then a big wave hit our lifeboat and flipped the crew into the water with the German Sailors. We took 17 prisoners on board.

It was almost a major coup. Three lifeboats reached the Type VII C boat. German code books and the cypher machine were seized, but all three seaboats capsized in the rough sea and only one book was saved. All the Canadians were picked up. So, too, were 40 Germans. Icarus then dispatched the unsalable U-744 with a torpedo. Eleven Germans died, including the captain.