What action should a pilot take when they receive an approach clearance while being radar vectored?

When a pilot receives an approach clearance while being radar vectored, the appropriate action is to maintain the last assigned altitude until they are established on the approach. This ensures safety and adherence to procedures.

Maintaining the last assigned altitude allows the pilot to stay within the air traffic control (ATC) directed altitude structure, reducing the risk of altitude conflicts with other aircraft. Establishing on the approach means that the aircraft is properly aligned for landing, and only at that point should the pilot initiate a descent, as prescribed by the approach procedure.

This approach minimizes the potential for errors and ensures that the aircraft follows the expectations of ATC during the transition from the en-route phase to the approach phase. By waiting to descend until established on the approach, pilots can effectively manage their aircraft’s performance and ensure compliance with the clearance issued by ATC.