What is required for operations in Class A airspace?

Operations in Class A airspace require pilots to be flying under Instrument Flight Rules (IFR) with appropriate equipment. This is because Class A airspace is located from 18,000 feet mean sea level (MSL) up to and including Flight Level 600, where IFR is the only permitted operating mode. Pilots must possess an instrument rating and ensure their aircraft is equipped for IFR operations, including functioning navigation and communication equipment.

VFR flight plans and clearances are not applicable in Class A airspace, as visual flight rules do not pertain to flying in this altitude range. Additionally, a student pilot certificate on its own does not meet the regulatory requirements to operate in this airspace without adhering to IFR protocols. Thus, having an IFR plan and suitable equipment is the sole criterion for safe and legal operation in Class A airspace.