What action must be taken during the hand-off process between controllers?

During the hand-off process between controllers, the notification of change in frequency is essential to ensure that the aircraft can communicate with the next controller without interruption. This step allows for a seamless transition as the aircraft moves from one airspace sector to another, maintaining safe and efficient operations.

The new frequency information provides the pilot with crucial details on how to continue to receive air traffic services, communicate their intentions, and receive instructions pertinent to their flight path. It is a fundamental part of the hand-off procedure to guarantee that all parties involved, both the controllers and the pilot, are informed and can operate without ambiguity.

While verification of clearance, establishing visual contact, and confirmation of altimeter settings are important procedures in air traffic control operations, they are not specifically required at the moment of handing off communication from one controller to another. The focus of the hand-off process is on ensuring that the aircraft is appropriately informed of the change in frequency to facilitate ongoing communication and maintain safety in the airspace.