Abstract: An airport navigation light unit wherein connection elements for supply lines, a lighting device, a sensor device, a switching device and a communication device are provided in a base body The switching device and the communication device are connected to the connection elements. The communication device switches the switching device, according to control signals which are transmitted via the supply lines, which switches the lighting device on to the connection elements. The sensor device detects a state prevailing outside the airport navigation light unit and transmits it to the communication device which determines a useful signal therefrom which it feeds to the supply lines. The control signals and the useful signal are transmitted as OFDM signals via the supply lines. An airport navigation light system comprises a plurality of said airport navigation units.