Gate – Aircraft parking position on the terminal ramp (apron) usually connected to the terminal by a loading bridge. Gates are typically defined to include positions large enough for narrowbody or larger aircraft; smaller positions used for regional jets or turboprops are typically counted separately. ICAO – International Civil Aviation Organization, an agency of the United Nations which adopts standards and recommended practices concerning air navigation, airports, and other aviation-related subjects for international civil aviation. Approximately 190 countries (referred to as States) are members of ICAO. Landing fees – Fees charged to aircraft owners and operators for the use of runways, taxiways, landing strips, runway protection zones, and clearways. Does not include fees for parking aircraft. Non-aeronautical operating revenue – Operating revenue to the airport not derived from the aeronautical use of the airport. Includes revenues from land rental and non-terminal facilities, concessions for food & beverage, retail, and advertising, rental cars, public and employee parking, hotel and ground transportation. Non-operating costs – Expenses for activities not relating to the core operations of the airport, such as interest charges, pension contributions, capital distributions, extraordinary losses, and taxes. Passengers – Enplaning (embarking) and deplaning (disembarking) passengers at an airport, including passengers who are continuing their air journey. Excludes passengers who remain onboard and are continuing their journey. Runway Incursion – Any incident at an airport involving the incorrect presence of an aircraft, vehicle, or person on the protected area of a surface designated for the landing and takeoff of aircraft. Taxi to Runway – Commences when the aircraft begins to move under its own power leaving the gate, ramp, apron, or parking area, and terminates upon reaching the runway. Total Operating Revenue – The sum of Aeronautical and Nonaeronautical operating revenue. WLU or Work Load Unit – One passenger (departing or arriving) or 100kg of freight (inbound or outbound). Widely used aggregate measure, although criticized for arbitrary weighting of freight that may overstate its resource requirements in relation to passengers.
ACI Guide to Airport Performance Measures
51