Class A airspace is the airspace from 18,000 ft. MSL(Mean Sea Level) up to and including flight level (FL) 600. This includes the airspace over water within 12 NM(Nautical Miles) of the coast of the 48 states and Alaska.
Class A Operating Rules and Equipment Requirements (FAR 91.135)
- An IFR clearance and two-way-radio communication is required to fly in Class A airspace. As a VFR pilot, you cannot operate as PIC in Class A.
- A Mode C transponder, and appropriate navigational equipment is required.
Class A Airspace Depiction and Symolology
- -Class A airspace is not depicted on sectional charts because it is all airspace from 18,000 to 60,000 ft. MSL.