What is Aerodrome Control

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Position Disciplines

An aerodrome control unit provides:

  • Aerodrome Control Service
  • Flight Information Service
  • Alerting Service The Aerodrome controllers provide these services to aircraft flying with visual reference to the surface inside or in the vicinity of the Aerodrome Traffic Zone and aircraft operating on the manoeuvring area of the airfield.

    Aerodrome Control may be split into different disciplines:
  • GMP (Delivery)
  • GMC (Ground)
  • AIR (Tower)

  • Responsibilities of Aerodrome Control

    Aerodrome controllers are responsible for issuing information and instructions to aircraft under their control in order to achieve a safe, orderly and expeditious flow of air traffic. They also assist pilots in preventing collisions between:

  • Aircraft flying in and in the vicinity of the Aerodrome Traffic Zone (ATZ)
  • Aircraft taking off and landing
  • Aircraft moving on the apron
  • Aircraft and vehicles, obstructions and other aircraft on the manoeuvring area
  • Aerodrome Control may be split into different disciplines:

  • GMP (Delivery)
  • GMC (Ground)
  • AIR (Tower)
  • GMP

    The GMP (Clearance delivery) controller is responsible for providing departing aircraft with their IFR clearance. It is not something to be taken lightly. The smooth flow of all traffic depends on these clearances. If a clearance is incorrect another controller down the line will have to amend it, and potentially distract the pilot from his flying. If the error would have been corrected before take-off the pilot would have had all the time to amend his plan, and not have anything to worry about when in the air.


    GMC (Ground) Controllers are responsible for getting aircraft from the aprons to the runways and back safely and with minimal delay. In conditions of low visibility or when aircraft unfamiliar to the aerodrome visit, they may be called upon to provide guided taxi instructions. They are also responsible for issuing instructions to any vehicles (Follow Me cars, runway inspection vehicles) on the manoeuvring area. GMC Controllers will also issue IFR clearances when GMP is not open, or doesn't exist at the airport.


    The AIR (tower) controller is responsible for all active runways, and for traffic operating in and within the vicinity of the Aerodrome Traffic Zone (up to 2.5nm radius, Surface up to 2000 AAL). At most airports, the tower controller will be responsible for the runway access points. AIR controllers will carry out the tasks of GMP and GMC in the absence of these controllers.