Yaak Air Force Station

Yaak Air Force Station was an Air Defense Command general surveillance radar station in Lincoln County, Montana. Built as one of twenty-eight stations in the second segment of the Permanent System radar network, the 680th Aircraft Control and Warning Squadron was activated at the installation on 1 March 1951 for ground-controlled interception operating AN/FPS-3 and AN/FPS-4 radars in April 1952. An AN/FPS-6 was added in 1956, and the AN/FPS-4 was replaced by an AN/GPS-3 in 1957.

Yaak Air Force Station

Yaak Air Force Station was an Air Defense Command general surveillance radar station in Lincoln County, Montana. Built as one of twenty-eight stations in the second segment of the Permanent System radar network, the 680th Aircraft Control and Warning Squadron was activated at the installation on 1 March 1951 for ground-controlled interception operating AN/FPS-3 and AN/FPS-4 radars in April 1952. An AN/FPS-6 was added in 1956, and the AN/FPS-4 was replaced by an AN/GPS-3 in 1957.