[2][3] Sperry Corporation built 12 long range radars (picking up objects 200 miles away) in the 1960s to succeed existing Semi Automatic Ground Environment (SAGE) to provide enhanced electronic countermeasures (ECM).

[4] The 85 foot (26 m) enclosed radar towers that supported all 12 of the FPS-35 antennas were prominent landmarks.

All these radar towers were of the same basic design with 10 made primarily from concrete and two based on a steel frame structure (Baker and Finley).

All of the radars have been dismantled except for the one at Camp Hero State Park on the eastern tip of Long Island in Montauk, New York.

[5][6] Fishermen on the Atlantic Ocean and Block Island Sound lobbied to save it since the massive radar tower was a better daytime landmark than the Montauk Point Lighthouse.