FreeRoutingAirspace
European Supplement
urn:aero:ses:eurocontrol:airm:1.0.0:ConceptualModel:Subjects:AirspaceInfrastructure:Airspace:FreeRoutingAirspace
Airspace defined laterally and vertically, allowing Free routing with a set of entry/exit features. Within this airspace, flights remain subject to air traffic control.
Source:
SESAR,