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]

markers on a line near an airfield

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.

An overhead line obstruction warning marker near an airstrip.

See also

Notes and references
  1. Aerial marker balls for Power lines
  2. Marking of Army airfield-heliport operational and maintenance facilities - 7-9 Markers page 7-6
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