http://www.globalsecurity.org/military/facility/beaufort-tacts.htm

Tactical Aircrew Combat Training System (TACTS)

Beaufort and Towsend. They appear to have a combination of solar and diesel generator driven (backup) power for their lights and other "systems".

During the early cold war, there were radar towers in Long Island Sound. They were eventually "cut-up" and removed or sunk, as I recall.