ActuallyIn fact, TACAN is not covered by PANS-AIM, as it is considerd considered as military facility, which is not under civil autority authority (and thus also not covered by ICAO Annex 10, Aeronautical Telecommunications).
However, as a TACAN may be used for navigation purposes for civil aviation, and in some states it is also published in the civil AIP, and is defined in ARINC 424, it is also covered by this coding guidelines.
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The diagram below shows the AIXM classes, including the relevant data types and code lists, needed to encode that information. The main class is the TACAN which is a specialisation of the NavaidEquipment.
TACAN Designator & Name
In general, a TACAN will carry a three letter character identifier. The TACAN.designator attribute is used to code that data.
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As the TACAN provides distance information, the elevation of its antenna is relevant. It is coded using for the TACAN.location using the ElevatedPoint.elevation attribute.
| Note | ||
|---|---|---|
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| The ElevatedPoint.elevation for the Navaid.location has not to be coded. |
As TACAN is not covered by PANS-AIM, no accurcy accuracy value is defined for its elevation. However, AIXM provided provides the possibility to code it using the ElevatedPoint.verticalAccuracy attribute.
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The angular difference between the direction of the 'zero bearing', indicated by the station and the direction of the True North at the time the VOR station is calibrated, is coded by the attribute TACAN.declination.
| Warning | ||
|---|---|---|
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| TACAN does not have an attribute for "zero bearing direction". |
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| Identifier | Data Encoding Rule | Justification | Data Verification Rule (UID) | Remarks |
|---|---|---|---|---|
| TCN-101 | The TACAN.designator attribute is mandatory. | Minimum AIP data set | TBD | |
| TCN-102 | The TACAN.name attribute is mandatory. | Minimum AIP data set | TBD | |
| TCN-103 | The TACAN.channel attribute is mandatory. | Minimum AIP data set | TBD | |
| TCN-104 | The TACAN.location property is mandatory. | Minimum AIP data set | ||
| TCN-105 | For TACAN ElevatedPoint.elevation is mandatory. | Minimum AIP data set | TBD | |
| TCN-106 | For TACAN ElevatedPoint.accuracy should be provided. | PANS-AIM | TBD | |
| TCN-107 | For TACAN ElevatedPoint.verticalDatum should be provided. | PANS-AIM | TBD | |
| TCN-108 | TACAN.designator shall not be duplicated within 600 NM of the location of the TACAN (see Annex 11, Appendix 2, paragraph 2.2.2). | EAD / ICAO Annex 11 | TBD | |
| TCN-109 | No more than one TACAN may be co-located with same VOR. | EAD / Data consistency | TBD | |
| TCN-110 | The value of the TACAN.channel must be paired with the VOR.frequency of the related VOR; the channel-frequency pairing table is identical to the one for DME-VOR, as contained in Table A, ICAO Annex 10, Vol.1. | EAD / Data consistency | TBD |
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