Pinetree Line
Construction of the Pinetree Line started as a joint Canadian and American project in the early 1950's.The Pinetree Line radar stations were constructed and strategically located to counter the Soviet air threat against North America, and initially, they were fully manual early warning or aircraft control and warning (AC&W) systems which were established into geographical sectors.
The Pintree Line was put in as a third line of defense. If a rocket or aircraft were to get through the DEW Line and the Mid Canada Line, There was always the Pintree Line to pick it up on its radar.
