providers. The premises also accommodate the peacetime operations centre and air surveillance center of the Swiss Air Force. Skyguide's Geneva centre is responsible for Western Swiss airspace, the airspace above the French Alps and part of Italian airspace on the border with France. Skyguide maintains further operations at Bern (Belp), Buochs, Grenchen, Lugano (Agno) and St. Gallen-Altenrhein regional airports, and at numerous all-military or joint civil/military airfields. These include Alpnach, Dübendorf, Emmen, Locarno, Meiringen, Payerne and Sion. At Les Eplatures regional airport, the air traffic services have been delegated to the airport operator. Radar stations Skyguide uses nine radar stations for civil air traffic control: Two own wide-ranging secondary radar stations, also referred to as «en route»- radar stations, with locations above the Zurich community Boppelsen on the Jura hillside Lägern and on the La Dôle Wide-ranging secondary radar dates from the Swiss Air Force FLORAKO radar ("TG") in Ticino on Mt. Scopi Two own combined primary and secondary radar, also referred as «Approach» radar stations, at the airports of Geneva (in Cointrin) and Zurich (on the Klotener Holberg) for landing and take-off guidance. Four foreign radar stations to complete the national radar coverage in Switzerland and to provide air traffic to neighboring air traffic controllers with locations in Cirfontaine and Nevers (France), Gosheim (Germany) and Monte Lesima (Italy). Collaborations in Europe Skyguide's partners are the International Civil Aviation Organization (ICAO), Eurocontrol (Europe's umbrella air navigation services organization) and the Civil Air Navigation Services Organisation (CANSO). Europe's airspace is highly fragmented today. The Single European Sky (SES) project of the European Commission is intended to harmonize the continent's air traffic management systems and, in doing so, enhance the efficiency of the overall airspace structure. And one prerequisite for this – in addition to tailoring airways more closely to users' requirements rather than basing them on national borders – is the creation of a series of large integrated airspace blocks. Skyguide is a member of Functional Airspace Block Europe Central (FABEC)[6], which controls some 55% of all the air traffic handled in Europe, or around 5.3 million flights a year. The six FABEC member states – Belgium, France, Germany, Luxembourg, the Netherlands and Switzerland – signed the corresponding international agreement in December 2010, laying the legal foundation for the new airspace entity. Skyguide's main contribution to the defragmentation of European airspace, however, is its concept to consolidate existing air navigation centres