AN/FLR-9

The AN/FLR-9 is a type of very large circularly disposed antenna array, built at eight locations during the Cold War for HF/DF direction finding of high priority targets.

Because of the exceptionally large size of its outer reflecting screen (1056 vertical steel wires supported by 96 120-foot (37 m) towers), the FLR-9 was commonly referred to by the nickname "Elephant Cage."

Band C contains 48 antenna elements mounted on wooden structures placed in a circle around the central building.

Band C elements consist of two horizontally polarized dipole antenna subelements electrically tied together, and positioned one above the other.The array is centered on a ground screen 1,443 feet (439.8 m) in diameter.

In early May 2002, systematic dismantling of the FLR-9 at San Vito began, and it was totally deconstructed by the end of that month.