UpperFlightInformationRegion
urn:aero:airm:1.0.0:ConceptualModel:Subjects:AirspaceInfrastructure:Airspace:UpperFlightInformationRegion
An upper airspace of defined dimensions within which flight information service and alerting service are provided.
Source:
EUROCONTROL-FAA AIXM v.5.1,
Abbreviations:
UIR