Actually, TACAN is not covered by PANS-AIM as it is considerd as military facility which is not under civil autority (and thus also not covered by ICAO Annex 10, Aeronautical Telecommunications).
However, as a TACAN may also be used for navigation purposes for civil aviation and in some states is also published in the civil AIP it is covered by the coding guidelines.
For general PANS-AIM requirements valid for all kind of Radio navigation aids see topic Navaid [NAV] and subordinated pages.
A UHF Tactical Air Navigation beacon (TACAN) is a navigation system developed by military and naval forces providing, as far as the navigating pilot is concerned and for suitably equipped aircraft, the same indication as a VOR/DME system (i.e. it provides bearing and distance information).
Henc, for a TACAN the following additional properties defined in PANS-AIM for the minimum AIP dat aset for radio navigation aids are relevant:
...channel, ...elevation,...
The diagram below shows the AIXM classes, including the relevant data types, needed to encode that information The main class is the TACAN which is a specialisation of the NavaidEquipment.
TACAN Channel
The channel of the TACAN system is coded using the TACAN.channel attribute.
Elevation
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
As TACAN is not covered by PANS-AIM no accurcy value is defined for its elevation. However, AIXM provided the possibility to code it using the ElevatedPoint.verticalAccuracy attribute.
Coding Rules
TBD
Coding Examples
TBD