Corvettes were small, fast ships used by the Canadian Navy in World War II to protect convoys, because they were the only ships fast enough to be able to defend against and potentially destroy the infamous German U-boats.
The HMCS Sackville, pictured above, was commissioned on December 29, 1941, and was built at St. John, New Brunswick. It was credited with a "possible kill" and a "possible damage" against German U-boats in WWII. More importantly though, it is the last remaining Corvette ship of thatera.
The HMCS Sackville is now a National Historic Site, and is maintained as a living monument at Sackville Landing on the Halifax Waterfront, by the Canadian Naval Memorial Trust. It is free to walk on and explore the ship during the summer months when it is open for viewing.
(HMCS Sackville, in its original paint scheme, as viewed from the HMCS Athabaskan battle ship, during the International Fleet Review Week. The blue and white colours made the ship appear to blend in with the waves on the ocean, and made it more difficult for enemy submarines or planes to judge the distance to the ship due to the relatively poor tracking technology of the time.)