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English thesaurus
air routes
mil., logist.	Air routes are created to permit the logistical air traffic over the rear area. Whenever possible, they correspond to the civilian peacetime air routes. (FRA)
air route ['eəruːt]
avia., Canada	The uncontrolled airspace within the boundaries or along the tracks specified on an aeronautical chart, or the controlled airspace within the boundaries or along the tracks specified in the Designated Airspace Handbook (DAH)
USA	The navigable airspace between two points, identified to the extent necessary for the application of flight rules (JP 3-52)