fan marker

English

Noun

fan marker (plural fan markers)

1. (aviation) An obsolescent type of marker beacon, usually used to mark en route airways but occasionally used as part of a non-precision approach, which radiates in a pattern that is considerably wider, from the perspective of an aircraft approaching the marker along the airway, than it is long (allowing an aircraft to pick up the signal from the marker even if slightly to one side of the airway's centerline).

Synonyms

• FM

Hypernyms

• marker beacon

Coordinate terms

• inner marker
• middle marker
• outer marker