![]() ![]() Quote regarding marker beacons –from an old edition of AIM, section 1-1-9. ^ Note: They are only used on a few instrument approaches anymore, to mark positions along the inbound course, when there is only one marker present: for an example, see the LOC-D document for Gillespie Field (PDF), effective - here GRIGG is a fan marker.^ Instrument Flight Training Manual accessed. ![]() in a shape of a hand-held fan held up perpendicular to the flight course). ^ Note: The term fan marker can refer to almost any type of marker beacons used in aviation (including inner/middle/outer markers), since most of them transmit signal in the fan-shaped pattern (i.e.^ Marker beacon : attributed to McGraw-Hill Dictionary of Aviation.^ a b FAA AIM 1-1-9Archived at the Wayback Machine article FAA.com retrieved.^ Note:Some ILS approaches have no navigation aid at all situated at the final approach fix, but use other means, such as VOR radial intersections, distance measuring equipment (DME), GPS, or radar fixes, to identify the position.^ ILS – Marker beacons ILS.com retrieved.Radio Stations and Systems – Article 1.107, definition: marker beacon ![]()
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