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In AIXM 5, a Navaid is composed of one or more NavaidEquipment.
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| Is there a situation where a NavaidEquipment (e.g.standalone DME) will be coded without being related with a Navaid? or is this relationship mandatory? |
To describe a physical navaid equipment in AIXM 5, the NavaidEquipment class is used. This class is specialised into: Azimuth, DME, DirectionFinder, Elevation, Glidepath, Localizer, MarkerBeacon, NDB, SDF, TACAN, VOR.
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In addition, also related to Navaid class are the servedAirport if any, and the availability of the Navaid defined by one or more Timesheet (see Schedule [TSH] Common coding patterns for details).
A Navaid may be used a SignificantPoint, e.g. for the start or end point of a route or terminal procedure or the centre point of a TAA/MSA, etc.
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Each NavaidEquipment will have a location defined by the Point class. For certain NavaidEquipment an elevation has to be defined. In this case, the ElevatedPoint class has to be used (e.g. for DME).
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Also, the Navaid class itself may have a location. This is the location used when the navaid acts as a significant point (see also SignificantPoint [SPN](Overview)). This location is usually the location of one of the navaid equipments (e.g. in case of a VOR/DME it will be in general the location of the VOR).
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