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
Huron Broadcasting (Gilder changed those stations' call signs to CFYN and CHAS.) Huron subsequently also opened CKCY-TV in 1977. Huron sold its radio stations to other owners in the mid-1980s. Telemedia acquired Sault Ste. Marie's CJIC and CJIC-FM, by this time known as CFYN and CHAS-FM, in 1985, while the remaining stations were sold to Mid-Canada Radio in two separate transactions, in 1986 (the stations in Blind River, Elliot Lake and Espanola) and 1988 (the remaining stations in Sault Ste. Marie and Wawa). The television stations were acquired by Baton Broadcasting in 1990, and were converted by Baton to the MCTV branding