CGS Canada was a patrol vessel, sometimes referred to as a cruiser, in the Fisheries Protection Service of Canada, an enforcement agency that was part of the Department of Marine and Fisheries. Canada is considered to be the nucleus of the Royal Canadian Navy for her role in training Canadian naval officers and asserting Canadian sovereignty. Canada saw service in the First World War and was commissioned into the Royal Canadian Navy as HMCS Canada during that conflict. Following the war, the vessel was sold for commercial use and renamed MV Queen of Nassau. On the verge of being sold again, the ship sank in Straits of Florida on 2 July 1926.