aerodrome control service — an ATC service for aerodrome traffic 2.

aeronautical information service — a service established within the defined area of coverage responsible for the provision of aeronautical information and data necessary for the safety, regularity, and efficiency of air navigation 3.

air navigation service providers — any public or private entity providing air navigation services for general air traffic 5.

air navigation services — air traffic services; communication, navigation and surveillance services; meteorological services for air navigation; and aeronautical information services 4.

air traffic control (ATC) service — a service provided for the purpose of: preventing collisions: between aircraft, and in the manoeuvring area between aircraft and obstructions; and expediting and maintaining an orderly flow of air traffic 1.

air traffic flow management — a function established with the objective of contributing to a safe, orderly and expeditious flow of air traffic by ensuring that ATC capacity is utilised to the maximum extent possible, and that the traffic volume is compatible with the capacities declared by the appropriate air traffic service providers 9.

air traffic management — the aggregation of the airborne and ground-based functions (air traffic services, airspace management and air traffic flow management) required to ensure the safe and efficient movement of aircraft during all phases of operations 10.

air traffic services — the various flight information services, alerting services, air traffic advisory services and ATC services (area, approach and aerodrome control services) 11.

airspace block — an airspace of defined dimensions, in space and time, within which air navigation services are provided 6.

airspace management — a planning function with the primary objective of maximising the utilisation of available airspace by dynamic time-sharing and, at times, the segregation of airspace among various categories of airspace users on the basis of short-term needs 7.

airspace users — all aircraft operated as general air traffic 8.

approach control service — an ATC service for arriving or departing controlled flights 13.

area control service — an ATC service for controlled flights in a block of airspace 12.

bundle of services — two or more air navigation services 14.

certificate — a document issued by a Member State in any form complying with national law, which confirms that an air navigation service provider meets the requirements for providing a specific service 15.

communication services — aeronautical fixed and mobile services to enable ground-to-ground, air-to-ground and air-to-air communications for ATC purposes 16.

concept of operation — the criteria for the operational use of the EATMN or of part thereof 18.

constituents — tangible objects such as hardware and intangible objects such as software upon which the interoperability of the EATMN depends 19.

European air traffic management network — the collection of systems listed in Annex I to Regulation (EC) No 552/2004 of the European Parliament and of the Council of 10 March 2004 on the interoperability of the European air traffic management network (the interoperability Regulation)(9) enabling air navigation services in the Community to be provided, including the interfaces at boundaries with third countries 17.

flexible use of airspace — an airspace management concept applied in the European Civil Aviation Conference area, as specified in the first edition of 5 February 1996 of the "Airspace Management Handbook for the application of the Concept of the Flexible Use of Airspace" issued by Eurocontrol 22.

flight information region — an airspace of defined dimensions within which flight information services and alerting services are provided 23.

flight level — a surface of constant atmospheric pressure which is related to the specific pressure datum of 1013,2 hectopascals and is separated from other such surfaces by specific pressure intervals 24.

functional airspace block — an airspace block based on operational requirements, reflecting the need to ensure more integrated management of the airspace regardless of existing boundaries 25.

general air traffic — all movements of civil aircraft, as well as all movements of State aircraft (including military, customs and police aircraft) when these movements are carried out in conformity with the procedures of the ICAO 26.

ICAO — the International Civil Aviation Organisation, as established by the 1944 Chicago Convention on International Civil Aviation 27.

interoperability — a set of functional, technical and operational properties required of the systems and constituents of the EATMN and of the procedures for its operation, in order to enable its safe, seamless and efficient operation. Interoperability is achieved by making the systems and constituents compliant with the essential requirements 28.

meteorological services — those facilities and services that provide aircraft with meteorological forecasts, briefs and observations as well as any other meteorological information and data provided by States for aeronautical use 29.

navigation services — those facilities and services that provide aircraft with positioning and timing information 30.

operational data — information concerning all phases of flight that are required to take operational decisions by air navigation service providers, airspace users, airport operators and other actors involved 31.

putting into service — the first operational use after the initial installation or an upgrade of a system 33.

route network — a network of specified routes for channelling the flow of general air traffic as necessary for the provision of ATC services 34.

routing — the chosen itinerary to be followed by an aircraft during its operation 35.

seamless operation — the operation of the EATMN in such a manner that from the user's perspective it functions as if it were a single entity 36.

sector — part of a control area and/or a flight information region/upper region 37.

surveillance services — those facilities and services used to determine the respective positions of aircraft to allow safe separation 38.

system — the aggregation of airborne and ground-based constituents, as well as space-based equipment, that provides support for air navigation services for all phases of flight 39.

upgrade — any modification that changes the operational characteristics of a system 40.