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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 the "VHF NAVAID" record type for "ILS/DME" Bias.
The DME.displace 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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The example below shows hoe this information may be published in the Remarks column of AD 2.19/AD3.18
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| It is just a distance value without a reference (e.g. to the THR). The reference shall be coded by a Notean annotation for the displace attribute if needed. |
Ghost Frequency
Although not required by PANS-AIM, a "ghost frequency" will be coded in case of a stand-alone DME not collocated with a VOR.
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A DME may be co-located with one and only one VOR or NDB. In this case the corresponding Navaid feature will reference the DME as navaidEquipment.
In the AIP, collocated VOR and DME Navaids are usually referred to as VOR/DME or DVOR/DME.
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