What service must ZAE provide for GWO TWR?

The service that ZAE must provide for GWO TWR involves offering approach and departure control services. This is essential for ensuring safe and efficient operation of aircraft arriving at and departing from the airport. Approach and departure control services allow the tower to manage the air traffic as it descends toward the runway and ascends away from it, providing necessary instructions and maintaining the safe separation between multiple aircraft.

While other services like visual separation, ground control, and weather advisory services may also be important, they do not encompass the full scope of what is required for managing arriving and departing flights in a terminal airspace environment, where precise coordination is critical for safety and operational effectiveness. Approach and departure control ensures that the aircraft are safely sequenced during their critical phases of flight, which is a primary responsibility of the control tower.