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Radio beacons: Difference between revisions
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==Fix== | ==Fix== | ||
Not a radio beacon, but a combination of them. On aeronautical maps there are '''fixes'''. A fix is a place that is crossed by two or more ''easy'' radials from a [[VOR]] or bearings from a [[NDB]], some fixes are on a radial of a [[VOR-DME]] and a specific distance. Typically the ''easy'' bearings are 45 degrees intervals on a compass rose, but there are plenty of fixes that use other intervals. It is sometimes a bit of guessing what beacons should used for a fix, most often it's the two nearest ones. | Not a radio beacon, but a combination of them. On aeronautical maps there are '''fixes'''. Fixes are usually identified with a five letter code. Another word for a fix is '''Intersection'''. A fix is a place that is crossed by two or more ''easy'' radials from a [[VOR]] or bearings from a [[NDB]], some fixes are on a radial of a [[VOR-DME]] and a specific distance. Typically the ''easy'' bearings are 45 degrees intervals on a compass rose, but there are plenty of fixes that use other intervals. It is sometimes a bit of guessing what beacons should used for a fix, most often it's the two nearest ones. | ||
<!-- fix on NDB? Yes, look at Central Russia. Many fixes and no VOR stations nearby. --> | <!-- fix on NDB? Yes, look at Central Russia. Many fixes and no VOR stations nearby. --> | ||
==Marker beacons== | ==Marker beacons== | ||
Runways used to have three vertical directed radio beacons in-line with the runway to aid landing, the [http://en.wikipedia.org/wiki/Marker_beacon marker beacons]. It was often combined with the [[ILS]] | Runways used to have three vertical directed radio beacons in-line with the runway to aid landing, the [http://en.wikipedia.org/wiki/Marker_beacon marker beacons]. It was often combined with the [[ILS]] | ||