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Radio beacons: Difference between revisions
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→Marker beacons: Added fix
(→VOR: distance to VOR) |
(→Marker beacons: Added fix) |
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Often the [[VOR-DME]] part of the [[TACAN]] is also made available for civilian navigation. If so, the beacon is called a '''VORTAC''', but the use is as a normal [[VOR-DME]], in the normal frequency range. The range of the beacon varies. Most have the same range as a [[VOR-DME]] but many will have different ranges. | Often the [[VOR-DME]] part of the [[TACAN]] is also made available for civilian navigation. If so, the beacon is called a '''VORTAC''', but the use is as a normal [[VOR-DME]], in the normal frequency range. The range of the beacon varies. Most have the same range as a [[VOR-DME]] but many will have different ranges. | ||
==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. | |||
<!-- 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]. | 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]. | ||