RadioAltimeterOperatingArea


             urn:aero:airm:1.0.0:ConceptualModel:Subjects:BaseInfrastructure:AerodromeInfrastructure:RadioAltimeterOperatingArea

A flat area established in the pre-threshold area of a precision approach runway to accommodate aeroplanes making auto-coupled approaches and automatic landings.

Source: ICAO Annex 14, Vol. I, Fifth Edition,