FSX – BNX Italian Boundary Airspace – CTR and ATZ. AIRAC effective date 03 Apr 2014. The database of FSX, about the various boundaries airspace data goes back to 2005. In the meantime much has changed in Italian airspace (and certainly outside Italy), so it seemed like a good thing the update of the vertical and horizontal boundaries of the airspace. With this file you can have directly on the map of FSX or on the GPS of your aircraft, the various Approach Control Zones (CTR) and the Military Aerodrome Traffic Zone (ATZ) of the airports on the Italian airspace. By Giovanni Miduri.