a defined area on land and water intended to used either wholly or in part for the arrival, departure and surface movement

air traffic control service provided for aerodrome traffic

a unit established to provide air traffic control service to aerodrome traffic

all traffic in the maneuvering area of an aerodrome and all aircraft flying on the vicinity of an aerodrome

code used to designate alert phase

telecommunication service between specified fixed points provided primarily for the safety of air navigation

control area or portion there of established in the form of corridor

air traffic control service provided for arriving and departing of controlled flights

unit established to provide air traffic control service in controlled airspace

service provided to notify appropriate organizations regarding aircraft in need of search

an aerodrome at which air traffic control service is provided to aerodrome traffic

controlled airspace extending upwards from specified limit above the earth

VMC

defined rectangular area on a land aerodrome prepared for the landing and take off of aircraft

a specified geographical location in relation to which the positon of an aircraft can be reported

controlled airspace extending upwards from the surface of the earth to a specified upper limit

an airspace of defined dimensions within which flight information service and alerting service is provided

a surface of constant atmospheric pressure which is related to a specific pressure datum

aircraft based on secondary surveillance radar transponder signal which operates independently of ground based equipment to provide advice to the pilot on potential conflicting aircraft that are equipped with SSR transponder

the point which an aircraft is granted an air traffic control clearance

any flight which is subject to an air traffic control clearance