Pinetree Line
The Pinetree Line, a radar chain along the 49th parallel, began in 1948 and provided 2 hours warning time of an attack. Though it was gradually cut, it continued to be used until the late 1980s.
The Pinetree Line, a radar chain along the 49th parallel, began in 1948 and provided 2 hours warning time of an attack. Though it was gradually cut, it continued to be used until the late 1980s.