Coordination must be made with the receiving ARTCC during manual data transfer when the departure point is less than how many minutes flying time from the ARTCC boundary?

The correct choice is based on the standard protocols for communication and coordination between air traffic control facilities. When a flight is approaching the boundary of an ARTCC (Air Route Traffic Control Center), it is essential that both the departure ARTCC and the receiving ARTCC coordinate effectively to ensure safety and air traffic efficiency.

In this specific scenario, the coordination must occur when the departure point is less than 15 minutes of flying time from the ARTCC boundary. This time frame is critical because it allows sufficient lead time for the receiving ARTCC to prepare for the incoming flight. Their ability to manage air traffic is contingent on having timely and accurate data about flights that are nearing their airspace.

By requiring coordination within this 15-minute window, air traffic controllers can efficiently manage incoming flights, make necessary adjustments, and ensure that the aircraft are safely transitioned from one ARTCC to another. This protocol is reinforced through established regulations and practices designed to maintain high safety standards in aviation operations.