The electronics for the 2000 NavSat 120 are mounted on the back of the dish. The ACU also receives data input from the NMEA gyro compass and GPS inputs to find the specified satellite station. The Conical Scan circuitry maintains the lock on the satellite once reception has been established. All electronics are totally screened and protected in the watertight electronics boxes shown above.
All external plugs are watertight and shielded.