Name	Data Type	Definition
designator	CodeNavaidDesignatorType	The identifying code given to the navaid.
name	TextNameType	The long name given to the navaid equipment.
emissionClass	CodeRadioEmissionType	A code indicating the type of emission, as defined at the 1979 ITU World Administrative Radio Conference.
mobile	CodeYesNoType	Indicates if the navaid equipment is mobile.
magneticVariation	ValMagneticVariationType	The measured angle between Magnetic North and True North at the VOR and at the time reported in dateMagneticVariation. By convention, the measure is expressed as a positive number if Magnetic North is to the east of True North and negative if Magnetic North is to the west of True North. Therefore, magnetic bearing + magnetic variation = true bearing. The following rule of thumb applies: ""variation east-magnetic least, variation west-magnetic best"".
magneticVariationAccuracy	ValAngleType	The accuracy of the measured angle between Magnetic North and True North at the VOR and at the time reported in dateMagneticVariation
dateMagneticVariation	DateYearType	The year the magnetic variation was measured.
flightChecked	CodeYesNoType	Indicates if the navaid equipment has been flight checked.

Association	Multiplicity	Role	To	Role description
isPlacedAt	0..1	location	ElevatedPoint	the graphical location of the component
isUnderResponsibilityOf	0..*	authority	OrganisationAuthority	The organization responsible for the equipment (could be owner or operator).
isUnmonitoredBy	0..*	monitoring	NavaidEquipmentMonitoring	Navaid equipment monitoring information.
worksBy	0..*	availability	NavaidOperationalStatus	The operational status of the navaid equipment.
hasAnnotations	0..*	annotation	Note

From	Association	Multiplicity	Role	To	Role description
RunwayCentrelinePoint	hasEstablished	0..*	navaidEquipment	A Navaid Equipment that is located near the runway and for which the relative position from a centreline point is defined.
EquipmentChoice		0..1	navaidEquipment	The component of a system used for air navigation.
Navaid	isComposedOf	0..*	navaidEquipment	the component of the navaid system
VerticalStructure	hosts	0..*	hostedNavaidEquipment	The Navigation Aid Equipment hosted by the Vertical Structure.

This class is specialized into: Azimuth , DME , DirectionFinder , Elevation , Glidepath , Localizer , MarkerBeacon , NDB , SDF , TACAN , VOR

1 - Navaid , 1- Radio Frequency Limitation , 2 - Navaid Equipment , 2 - Vertical Structure Associations , 3 - Navaid Limitation , 3 - Runway Operational Point , 5 - Navigation System Checkpoint