PANS-AIM requires the magnetic variation for all radio navigation aids without limitation to a particular type of navaid (see chapter 5.3.3.1 and ENR 4.1). However, PANS-AIM Appendix 1 requires the magnetic variation only for ILS and NDB.
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| title | PANS-AIM issue |
|---|
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1 (Aeronautical Data Catalogue) requires the magnetic variation only for ILS and NDB.
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In AIXM 5, the magnetic variation is coded on the specialised classes of the abstract NavaidEquipment class (see also topic Navaid Equipment).
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| Identifier | Data Encoding Rule | Justification | Data Verification Rule (UID) | Remarks |
|---|---|---|---|---|
| NAV-301 | For VOR or TACAN having a specified magneticVariation and dateMagnteicVariation, these values have to coincide with those of the AirportHeliport related to the Navaid the VOR or TACAN is a NavaidEquipment of. | EAD | TBD | |
| NAV-302 | If magneticVariation is specified, then dateMagnteicVariation is mandatory. | EAD / Data consistency | TBD | |
| NAV-303 | If magneticVariation is specified, then magneticVariationAccuracy should be provided. | PANS-AIM | TBD |
Coding Examples
See topic Navaid [NAV]..
Coding examples can also be found in the DONLON AIP data set file AIP Data Set - Specimen (DONLON):
| No. | Description | XPath Expression |
|---|---|---|
NDB-EX-01 | NDB (with magnetic variation coded) | //aixm:NDBTimeSlice [@gml:id ='NDB_DON'] |
NDB-EX-02 | NDB (with magnetic variation unknown) | //aixm:NDBTimeSlice [@gml:id ='NDB_KL'] |
See also topic Navaid [NAV].