Coordinated departures must happen if they are less than how many minutes flying time from the receiving facility's boundary?

Coordinated departures for aircraft are essential to maintain safe and efficient air traffic management, especially when considering the proximity of departing aircraft to the receiving facility's boundary. The requirement for coordination becomes critical when aircraft are less than 15 minutes flying time from this boundary.

This time frame ensures that air traffic controllers can effectively manage departures and arrivals without compromising safety. Coordination allows for the timely exchange of information regarding aircraft positions and intentions, facilitating a smoother flow of traffic as an aircraft approaches the boundary of a receiving facility. By adhering to this 15-minute window, controllers can anticipate airspace conflicts and adjust flight paths or timings as necessary, thus enhancing safety and operational efficiency in the airspace system.