sovereign airspace

How Far Up Does National Airspace Go?

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How Far Up Does National Airspace Go? Class A airspace is generally the airspace from 18,000 feet mean sea level (MSL) up to and including flight level (FL) 600, including the airspace overlying the waters within 12 nautical miles (NM) of the coast of the 48 contiguous states and Alaska. How far up does a

What Airspace Is Above Class A?

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What Airspace Is Above Class A? It ranges from 18,000 feet (Flight Level 180) to 60,000 feet (FL600). Altitudes 18,000 feet and above are called Flight Levels (FL). Class A airspace is not specifically charted on aeronautical charts. What airspace is above FL600? Airspace at any altitude over FL600 (60,000 MSL) (the ceiling of Class