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 split between Canadian Pacific and Canadian National Railway (CN). CN operates the rail lines and the bridge in the Sault Ste. Marie area that were formerly part of the Soo Line. The Sugar Island Ferry provides automobile and passenger access between Sault Ste. Marie and Sugar Island, formerly a center of maple sugaring. The short route that the ferry travels crosses the shipping channel. Despite the high volume of freighter traffic through the locks, freighters typically do not dock in the Sault. However, the city hosts tugs, a tourist passenger ferry service, and a Coast Guard station along the shoreline