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== Operation == | == Operation == | ||
TACAN in general can be described as the military version of the VOR | TACAN in general can be described as the military version of the [[VOR-DME]] system. It operates in the frequency band 960-1215 MHz. The bearing unit of TACAN is more accurate than a standard [[VOR]] since it makes use of a two frequency principle, with 15 Hz and 135 Hz components. | ||
The distance measurement component of TACAN operates with the same specifications as do civil | The distance measurement component of TACAN operates with the same specifications as do civil [[DME]]'s. Therefore to reduce the number of required stations, TACAN stations are frequently co-located with [[VOR]] facilities. These co-located stations are known as [[VORTAC]]'s. This is a station composed of a [[VOR]] for civil bearing information and a TACAN for military bearing information and military/civil distance measuring information. The TACAN transponder performs the function of a [[DME]] without the need for a separate, collocated [[DME]]. Because the rotation of the antenna creates a large portion of the azimuth signal, if the antenna fails, the azimuth component is no longer available and the TACAN downgrades to a [[DME]] only mode. | ||
=== FlightGear === | === FlightGear === |
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