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Aeronautics Aviation Transport Air traffic control Radar Skyguide Aviation accidents and incidents Airspace class Instrument flight rules | Schweizerische Sicherheitsuntersuchungsstelle SUST Service suisse d’enquête de sécurité SESE Servizio d’inchiesta svizzero sulla sicurezza SISI Swiss Transportation Safety Investigation Board STSB Aviation DivisioAdd to Reading ListSource URL: www.sust.admin.chDownload Document from Source WebsiteFile Size: 1,43 MBShare Document on Facebook |