Non-standard Aircraft Warning Lights
On some tall structures there are or were non-standard aircraft warning lights installed.
- The mast of Deutschlandsender Herzberg/Elster had no aircraft warning lamps installed. It was instead lit by skybeamers mounted on small masts near the tower. This method was chosen as the mast was a mast radiator insulated against ground and for feeding the lamps on the mast otherwise special devices like Austin transformers would be required.
- Stuttgart TV Tower carries rotating lamps like used on lighthouses. Such lamps were also used on other towers in earlier days.
- Blosenbergturm in Beromünster has a rotating lamp above the cabin. In opposite to Stuttgart TV Tower it is less bright and only operated at dawn.
- The main masts of Mühlacker radio transmitter and the former Konstantynów Radio Mast also have aircraft warning lights at the outermost bases of their anchor guys.
- Conductor marking lights and Balisors are sometimes used for marking power lines.
- The Obstacle Collision Avoidance System allows the standard lights to remain off until an aircraft is within a given radius, allowing for a significant decrease in light pollution. The OCAS system also provides audio warnings.
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