When must arrival information be forwarded to an approach control facility?

The requirement to forward arrival information to an approach control facility before transferring control jurisdiction is rooted in the need for effective coordination and communication between air traffic control (ATC) facilities. This practice ensures that the receiving approach control has all the necessary information about the arriving aircraft, such as its flight details, current position, and any relevant traffic information.

By providing this information before the transfer, the approach controller can better prepare for the aircraft's arrival, manage airspace efficiently, and ensure a smooth handoff. It allows the approaching aircraft to be integrated into the existing flow of traffic seamlessly, which is critical for maintaining safe separation and effective throughput of arriving flights.

If arrival information were provided at other stages, such as after takeoff, once on final approach, or after landing, it could lead to communication delays, misunderstandings, or inadequate preparation for the arrival. Hence, the emphasis is placed on ensuring that this vital information is exchanged prior to the transfer of control jurisdiction to facilitate safety and operational efficiency in air traffic management.