Overhead wire marker
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]
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markers on a line near an airfield
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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.
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An overhead line obstruction warning marker near an airstrip.
See also
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