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 Airport not affiliated with a municipality, since the city of Sault Ste. Marie declined to assume control. In 2002, the SSMADC opened "Runway Park", an entertainment and recreation area, on unused airport property to help generate revenue to support the airport's operation. The Sault Ste. Marie airport has equipment to support instrument approaches for all-weather operation, and a Nav Canada control tower. Air Canada Express operated by Jazz Air flies to Toronto Pearson International Airport six times daily using Bombardier Dash 8-100 aircraft. Porter Airlines operates four daily roundtrip flights to Toronto Billy Bishop airport during weekdays and two daily flights