the Anson and its ordnance had failed in RAF anti-submarine work. Now in Canada it was remobilized as an aerial scarecrow. German views varied as to Canadian countermeasures. The captain of U-517 found his operations increasingly restricted by strengthened air patrols. In October 1942, U-69 reported “strong sea patrol and constant patrol by aircraft with radar.” See also RCAF Western Air Command David Ernest Hornell Convoy ONS 5 Battle of the St. Lawrence Leonard Birchall Canadian Northwest Atlantic References Units and formations of the Royal Canadian Air Force Canadian armed forces air commands Military units and formations established in 1938 Battle of the Atlantic Military units and formations of Canada in World War II