Page Comparison

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See topic Basic Data for Navaid.

Hours of Operation

See topic topic Hours of Operation for Navaid.

DME Channel

The channel of the DME is coded using the DME.channel attribute.

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In case a DME is collocated with a VOR, certain requirements have to be taken in into account regarding the frequency pairing. The DME operating channel shall be paired with the VHF channel and/or MLS angle frequency as given in ICAO Annex 10, chapter 3, Table A

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Position

In case a DME collocated with a VOR is physically located at the same position as the VOR, the geographic position (latitude and longitude) of the VOR is also the geographic position of the DME.

In case a DME is collocated with a VOR and the position of the DME is different from the position of the VOR, some restrictions have to be taken into account (see Coding Rules below).

In case a DME is collocated with a VOR, unless otherwise specified, the published elevation (if any) refers to the DME. Thus, the elevation should be specified for the DME only.

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For more details see

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topic Navaid Position & Elevation.

Elevation

PANS-AIM requires for the DME an elevation to be coded. The DME.location will be coded with the ElevatedPoint.elevation attribute.

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The ElevatedPoint.verticalDatum should be used to encode the corresponding information (e.g. 'EGM_96').

Operating Authority

See topic See topic Operating Authority for Navaid.

Facility Coverage

See topic See topic Facility coverage.

DME Displacement

This information is not required by PANS-AIM for the AIP data set, but often published in State AIPs. Also, ARINC 424

  contains a data filed for the "VHF NAVAID" record type for "ILS/DME" Bias.

The The DME.displace attribute  attribute is used to code the distance from the DME antenna to the position where the zero-range indication occurs in the DME receiver.

It is relevant for DME used in the scope of an ILS installation.

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