What must ZAE do regarding the separation of departures and arrivals?

The requirement for ZAE to separate departures from arrivals still in ZAE airspace is crucial for maintaining safety and efficiency in air traffic management. This separation ensures that departing aircraft and arriving aircraft do not interfere with each other's flight paths, which is essential for preventing potential collisions and maintaining proper spacing to manage air traffic effectively.

By focusing on the separation of departures and arrivals that are still in the airspace managed by ZAE, controllers can ensure that each category of flight can operate without conflict, allowing for safe transitions in and out of the airport. Implementing this procedure contributes to the overall safety of operations by establishing clear, defined protocols that both departing and arriving aircraft must follow while within the controlled airspace. This not only enhances safety but also helps in optimizing traffic flow, ensuring that both departures and arrivals can operate as smoothly as possible.

The other options, while they may address aspects of air traffic control, do not focus specifically on the critical need for separation between departures and arrivals still within the ZAE airspace, which is the primary concern in this scenario.