"U-1223" entered the Gulf of St. Lawrence undetected in early October and is credited with seriously damaging the on 14 October and sinking the Canadian freighter SS "Fort Thompson" on 2 November. Three weeks later, "U-1228" attacked and sank the Flower-class corvette , a few kilometres off of Channel/Port aux Basque on the night of 24–25 November, with the loss of all 91 crew members, including former Toronto Maple Leafs hockey player Dudley "Red" Garrett. Authorities only realized that it sank when "Caribou"s replacement ferry, SS "Burgeo", sailed into North Sydney without "Shawinigan" on 26 November, after it had tried numerous times to make contact by radiophone earlier that day. Wreckage was discovered on 27 November, and six crewmen's bodies were recovered. It was the worst case of military deaths in Canadian territory during the war.