AeronauticalGroundLight
type: Class
subclass of: NavigationInfrastructure
comment: A light specifically provided as an aid to air navigation, with the exception of obstacle lights and lights forming part of surface or approach lighting systems

AeronauticalGroundLight-isFlashing
type: Class
subclass of: AeronauticalGroundLight
comment: An indication whether the light is steady or flashing.

AuthorityForNavaidEquipment
type: Class
subclass of: NavigationInfrastructure
comment: The level of responsibility of an organisation for a radio navigation aid.

AuthorityForSpecialNavigationStation
type: Class
subclass of: NavigationInfrastructure
comment: The level of responsibility of an organisation for a special navigation station.

AuthorityForSpecialNavigationSystem
type: Class
subclass of: NavigationInfrastructure
comment: The level of responsibility of an organisation for a special navigation system.

DME
type: Class
subclass of: RadioNavigationAid
subclass of: NavigationInfrastructure
comment: Ultra High Frequency (UHF) ground equipment that is used in conjunction with airborne equipment to determine distance between the airborne and ground equipment.

DirectionFinder
type: Class
subclass of: RadioNavigationAid
subclass of: NavigationInfrastructure
comment: An electronic device used to determine the position of a radio source by means of directional antennas, which receives the strongest radio signal when it is pointing directly at the transmitter.

DirectionFinder-isDoppler
type: Class
subclass of: DirectionFinder
comment: An indication whether the equipment uses the doppler effect for higher precision.

ILSGlidepath
type: Class
subclass of: NavigationInfrastructure
comment: A component of an ILS consisting of a UHF transmitter radiating signals and providing a straight line descent path in the vertical plane containing the centre line of the runway served by the ILS, and thereby furnishing descent information down to the lowest authorized decision height or to the surface of a runway, depending on the Facility Performance Category of the ILS.

InstrumentLandingSystem
type: Class
subclass of: RadioNavigationAid
subclass of: NavigationInfrastructure
comment: A combination of radio navigation services intended to facilitate aircraft in landing by providing lateral and vertical guidance including indications of distance from the optimum point of landing.

Localizer
type: Class
subclass of: NavigationInfrastructure
comment: A component of an ILS consisting of a VHF transmitter, radiating signals in the direction served by the ILS, to provide a straight line descent path in the vertical plane containing the centre line of the runway.

MLSAzimuth
type: Class
subclass of: NavigationInfrastructure
comment: A component of an MLS consisting of an SHF transmitter and associated equipment, radiating signals in a volume of airspace served by the MLS, thereby furnishing azimuth indications to aircraft approaching the runway or back azimuth indications to aircraft departing from the runway or performing a missed approach procedure.

MLSElevation
type: Class
subclass of: NavigationInfrastructure
comment: A component of an MLS consisting of an SHF transmitter, and associated equipment radiating signals within a volume of airspace served by the MLS, thereby furnishing elevation information as an angular value to aircraft approaching the runway.

MarkerBeacon
type: Class
subclass of: RadioNavigationAid
subclass of: NavigationInfrastructure
comment: A radio navigation service identifying a particular location in space by means of a 75 megahertz (MHz) transmitter which transmits a directional signal to be received by aircraft flying overhead.

MicrowaveLandingSystem
type: Class
subclass of: RadioNavigationAid
subclass of: NavigationInfrastructure
comment: A precision approach and landing guidance system operating in the microwave spectrum, which provides position information and various ground-to-air data.

NDB
type: Class
subclass of: RadioNavigationAid
subclass of: NavigationInfrastructure
comment: A low or medium radio navigation service transmitting signals whereby the pilot of a suitably equipped aircraft can determine bearings, 'home in' on, and/or track to or from the station.

NavaidComponent
type: Class
subclass of: NavigationInfrastructure
comment: The navigation use of a radio navigation aid as a component of the radio navigation service.

NavaidComponent-isNavigableLocation
type: Class
subclass of: NavaidComponent
comment: Indication that the radio navigation aid is used to specify the navigable location of the radio navigation service when the radio navigation service is used as a significant point.

NavaidEquipmentMonitoring
type: Class
subclass of: NavigationInfrastructure
comment: Information about the radio navigation aid monitoring.

NavaidEquipmentMonitoring-isMonitored
type: Class
subclass of: NavaidEquipmentMonitoring
comment: An indicator that the radio navigation aid is monitored.

NavaidOperationalStatus
type: Class
subclass of: NavigationInfrastructure
comment: Information about the operational status of the radio navigation aid.

RadioFrequencyArea
type: Class
subclass of: NavigationInfrastructure
comment: A limitation, such as coverage, usability, etc., of a radio navigation aid or service frequency.

RadioNavigationAid
type: Class
subclass of: NavigationInfrastructure
comment: Any electronic system which provides information to be used by the pilot or aircraft navigation systems for position determination or flight path guidance.

RadioNavigationAid-isFlightChecked
type: Class
subclass of: RadioNavigationAid
comment: Indication whether the radio navigation aid has been flight checked.

RadioNavigationAid-isMobile
type: Class
subclass of: RadioNavigationAid
comment: Indication whether the radio navigation aid is mobile.

RadioNavigationService
type: Class
subclass of: NavigationInfrastructure
comment: A service providing guidance information or position data for the efficient and safe operation of aircraft supported by one or more radio navigation aids.

RadioNavigationService-isFlightChecked
type: Class
subclass of: RadioNavigationService
comment: Indication whether the radio navigation service has been flight checked.

SimplifiedDirectionalFacility
type: Class
subclass of: RadioNavigationAid
subclass of: NavigationInfrastructure
comment: A radio navigation aid providing a final approach course similar to, but less precise than, that of the ILS localizer.

SpecialNavigationStation
type: Class
subclass of: NavigationInfrastructure
comment: A land based station of a special navigation system.

SpecialNavigationStationStatus
type: Class
subclass of: NavigationInfrastructure
comment: Information about the status of the special navigation station.

SpecialNavigationSystem
type: Class
subclass of: NavigationInfrastructure
comment: Wide area (worldwide) navigation systems based on a chain of land or maritime stations providing radio frequency signals which can be used by airborne equipment to determine at least, the mobile two-dimensional position.

TACAN
type: Class
subclass of: RadioNavigationAid
subclass of: NavigationInfrastructure
comment: A navigation system developed by military and naval forces providing, as far as the navigating pilot is concerned and for suitably equipped aircraft, the same indication as a VOR/DME system.

VOR
type: Class
subclass of: RadioNavigationAid
subclass of: NavigationInfrastructure
comment: A short-range, very-high-frequency omnidirectional beacon which provides an indication in the aircraft of the bearing of the beacon, or left-right track indication.

NavigationInfrastructure
type: Class
comment: Navigation infrastructure information.