Which of the following is NOT listed as a DRVSM qualification?

• A. Pilots must be trained to do so.
• B. Altimeter must be super accurate.
• C. Aircraft needs at least one automatic altitude control.
• D. Aircraft must have a magnetic compass.

Answer: (D)

DRVSM qualifications focus on maintaining precise altitude in reduced vertical separation airspace. The key elements are that pilots are trained to operate under DRVSM procedures, the aircraft has highly accurate altitude measurement and calibration, and there is automatic altitude control (an automatic altitude-hold capability) with at least two independent altitude data sources to ensure reliable altitude indication and discipline in flight. A magnetic compass, while a basic instrument for heading, is not part of DRVSM qualification criteria because DRVSM concerns altitude accuracy and automation, not heading instruments.