Obstacle

urn:aero:airm:1.0.0:ConceptualModel:Subjects:BaseInfrastructure:Obstacle:Obstacle

All fixed (whether temporary or permanent) and mobile objects, or parts thereof, that: a) are located on an area intended for the surface movement of aircraft; or b) extend above a defined surface intended to protect aircraft in flight; or c) stand outside those defined surfaces and that have been assessed as being a hazard to air navigation.

Source: ICAO Annex 1,ICAO Annex 11,ICAO Annex 14,ICAO Annex 15,ICAO Annex 4,
Abbreviations: OBST