Microwave navigation system - shore installation on tower.
Tower merely a platform and not loaded.
A line-of-sight system -- the higher the tower, the further the reception.
Tested on SOSBEE
Image ID: theb2340, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection Location: Tampa Bay area Photo Date: 1960 Credit: C&GS Season's Report Munson 1960-8