What does the symbol ^ over A3 indicate in air traffic control?

The symbol ^ over A3 in air traffic control indicates that the aircraft will not auto-handoff. This means that the system is notifying controllers that the automatic handoff feature for that specific aircraft will not occur, requiring manual intervention by the controller to initiate the handoff to the next sector or position. This is important for managing air traffic effectively since it ensures that the controller is aware of the need to take specific action with that aircraft, rather than relying on automated processes that may not apply in every situation.

Understanding this symbol helps in maintaining communication and ensuring a seamless transfer of aircraft from one sector of airspace to another, which is essential for maintaining safety and efficiency in air traffic management. The other choices—like indicating an aircraft is cleared for departure, awaiting handoff, or having reached cruising altitude—do not accurately describe the implication of this specific symbol and its operational context within the air traffic control system.