How high is navigable airspace?

For airplanes, the minimum flight altitude while flying over congested areas or open air assemblies of persons is 1,000 feet above the highest obstacle within a horizontal radius of 2,000 feet. 14 C.F.R. § 91.119(b). Over uncongested areas, airplanes can operate at an altitude of 500 feet above the surface.



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Upper Class E airspace operations refer to those that take place over 60,000 feet above mean sea level (MSL) in the National Airspace System (NAS). Operations in upper Class E airspace have historically been limited due to the challenges faced by conventional fixed wing aircraft in reduced atmospheric density.

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How and when can drone pilots use LAANC ? Drone pilots planning to fly under 400 feet in controlled airspace around airports must receive an airspace authorization from the FAA before they fly. LAANC is available to pilots operating under the Small UAS Rule Part 107 or under the exception for Recreational Flyers.

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The two categories of airspace are: regulatory and nonregulatory. Within these two categories, there are four types: controlled, uncontrolled, special use, and other airspace.

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The VFR Cruising Altitude rule does not apply below 3,000 feet AGL. There are some altitudes, however, that pilots seem to choose for level flight. Close to sea level they are 1000, 1500, 2000 and 2500. They are easy to read and remember on an altimeter.

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VFR cruising altitude rules in the US and Canada In the US, there are specific VFR cruising altitudes, based on the aircraft's course, to assist pilots in separating their aircraft while operating under visual flight above 3,000 ft above the surface (AGL) but below 18,000 ft Mean Sea Level (MSL).

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(c) Over other than congested areas – An altitude of 500 feet above the surface except over open water or sparsely populated areas. In that case, the aircraft may not be operated closer than 500 feet to any person, vessel, vehicle, or structure.

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This means the FAA has both authority and responsibility for airspace above FL600.

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