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A DME may be co-located with VOR. Such a VOR/DME will be coded as a Navaid.type equal-to 'VOR_DME', with two correspondning corresponding NavaidEquipment instances, a VOR and a DME.
For both NavaidEquipment the NavaidComponent.collocationGroup will be equal-to '1'.
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The VOR provides the bearing information, whereas the DME is used for the distance information.
VORTAC
Coding Rules for VOR
TBD
Coding Examples
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