Overhead wire marker
![](http://upload.wikimedia.org/wikipedia/commons/thumb/2/2c/Wire_marker.jpg/220px-Wire_marker.jpg)
Overhead wire markers are safety instruments applied to the overhead power lines marking transmission lines and ropeways along the flight path during the day.[1][2]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/2/26/Einebenenleitung.jpg/220px-Einebenenleitung.jpg)
Markers are often installed on overhead lines near airfields, or at river crossings where there is a possibility of float-equipped aircraft using the river. Some markers contain conductor marking lights or strobe lights to improve visibility at night or in fog.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/6/67/High_voltage_transmission_line_aviation_obstruction_marker.jpg/220px-High_voltage_transmission_line_aviation_obstruction_marker.jpg)
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