Radar fences

In Canada, during the cold war, there were 3 ‘radar fences’, lines of radar sites built across the country to detect invading Russian bombers. The southernmost line was the Pinetree line, the next one further north was the McGill fence, and finally in the far north was the Dew line.

The Pinetree line was in operation from the 1950s to the 1980s. Its stations are in brown.

The McGill fence was in operation from 1958 to 1965. Its stations are in yellow.

The Dew line was operational from 1957 to 1993. Its stations are in black.