Sault Ste. Marie, Ontario the locks. An anti-aircraft training facility was established north of Sault Ste. Marie on the shores of Lake Superior. Barrage balloons were installed, and early warning radar bases were established at five locations in northern Ontario (Kapuskasing, Cochrane, Hearst, Armstrong (Thunder Bay District), and Nakina) to watch for incoming aircraft. Military personnel were established to guard sensitive parts of the transportation infrastructure. A little over one year later, in January 1943, most of these facilities and defences were deemed excessive and removed, save a reduced military base at Sault Ste. Marie. The first "Algerine"-class minesweeper in the Royal Canadian Navy
Sault Ste. Marie, Michigan on the lower (east) side of the Soo Locks. The United States Postal Service operates a "Marine Post Office", situated within the locks, to service ships as they pass through. The city is located at Latitude: 46.49 N, Longitude: -84.35 W. According to the United States Census Bureau, the city has a total area of , of which is land and is water. Under the Köppen climate classification, Sault Ste. Marie has a humid continental climate ("Dfb") with cold, snowy winters and warm summers. Sault Ste. Marie is one of the snowiest places in Michigan, receiving an average of of