Where is Class A airspace?

Class A airspace generally begins from 18,000 feet mean sea level up to and including 60,000 feet. Operations in Class A are generally conducted under Instrument Flight Rules and primarily used by higher performance aircraft, airline and cargo operators, etc.



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Class A airspace begins at 18,000 feet above sea level known as mean sea level, or msl, and goes up to 60,000 feet msl. This airspace covers both the 48 contiguous states and Alaska and extends offshore 12 nautical miles.

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There are six classifications of airspace in the United States; A, B, C, D, E, and G. Class A is the most restrictive and Class G the least restrictive. They can be categorized as: Class A – 18,000 feet and higher above mean sea level (MSL). Class B – Airspace around the 40 most congested airports in the country.

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There's one more thing to keep in mind when you're operating in Class B airspace: in general, you need to be at least a private pilot to enter the airspace. Student, sport and recreational pilots can enter specific Class B airspaces, but only after they receive training and an endorsement from an instructor.

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The Class A, or Class Alpha category of controlled airspace is the high-altitude enroute airspace for jet and turboprop aircraft. It is the most restrictive airspace category with numerous entry and operational requirements for both pilots and aircraft.

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Class D airspace is most often found starting at the surface and extending up to and including 2,500 feet within a radius of 5 statute miles from the primary airport.

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Can we fly over it? Technically yes, BUT it's still a very bad idea because a motor out would force you to descend through the Class C airspace. We CAN'T fly here without special permission from ATC. Permission should be obtained in advance by telephone (some controllers will accept a radio call).

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Unless otherwise authorized or required by ATC, no person may operate an aircraft at or below 2,500 feet above the surface within 4 nautical miles of the primary airport of a Class C airspace area at an indicated airspeed of more than 200 knots (230 mph).

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There are two categories of airspace or airspace areas: Regulatory (Class A, B, C, D, and E airspace areas, restricted and prohibited areas). Nonregulatory (military operations areas [MOA], warning areas, alert areas, controlled firing areas [CFA], and national security areas [NSA]).

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Regardless of weather conditions, an ATC clearance is required prior to operating within Class B airspace. Pilots should not request a clearance to operate within Class B airspace unless the requirements of 14 CFR Sections 91.131, 91.215, and 91.225 are met.

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