Are Airspace Agl or Msl?

Airspace profile. 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 do I know if I have airspace AGL or MSL?

Sectional charts normally show both mean sea level (MSL) and above ground level (AGL) heights for towers. Next to the tower, you'll see two numbers. The top number is the height in MSL and the bottom number — in parentheses — is the height of the tower in AGL.

Who controls airspace?

U.S. Congress has vested the Federal Aviation Administration (FAA) with authority to regulate the areas of airspace use, management and efficiency, air traffic control, safety, navigational facilities, and aircraft noise at its source. 49 U.S.C.