Obstacle
urn:aero:airm:1.0.0:ContextualModel:ATMBusinessTerms: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
Abbreviations:
OBST