Dimensions
Class A airspace generally begins at 18,000ft MSL and extends up to and including FL600, but does not include the airspace less than 1,500ft AGL. This extends over the 48 contiguous states (and Alaska) and within 12nm off the coast, as well as designated international airspace beyond 12nm within areas of domestic radio navigation signal or ATC radar coverage.
Operating Rules and Pilot/Equipment Requirements
All person, unless otherwise authorized, must operate their aircraft under IFR in Class A. So what does that mean? In very simple terms, that means that both the pilot and aircraft will need to be instrument rated and be on an IFR flight plan. There is NO VFR flying allowed. You will need a clearance from ATC before you are permitted to enter Class A airspace. This airspace is controlled by an ARTCC (Air Route Traffic Control Center) AKA “Center”.
Within Class A airspace, the aircraft must be equipped with a two-way radio (and you must remain two-way communication with ATC) and an altitude reporting transponder (Mode C). If you are navigating with the use of VORs, DME will be required above 24,000ft MSL. Also, keep in mind, after Jan1st, 2020, ADS-B will be required.
Chart Depiction
Class A will not be depicted on any charts.