DCHP-1 Online
Mid-Canada line 
a system of radar stations stretching across Canada and designed to give early warning of hostile attack through the air.
- 1957 . . . the Mid-Canada Line of early warning stations is now almost finished. . . .
- 1965 The construction of the Distant Early Warning (DEW) Line and the Mid-Canada Line in the mid-1950's, with their great freight movements throughout the North, gave impetus to the activity of the governments . . . federal and provincial.
- 1957 . . . the Mid-Canada Line of early warning stations is now almost finished. . . .