GWO TWR must advise ZAE if an aircraft does not depart within how many minutes?

The correct answer is that GWO TWR must advise ZAE if an aircraft does not depart within 3 minutes. This requirement is based on standard operating procedures that ensure effective communication and coordination between air traffic service units. The 3-minute timeframe allows enough time for the controller to take action or follow up on the aircraft's departure status, which is critical for maintaining safety and efficiency in air traffic operations.

This brief window is particularly important because it reflects the rapid pace at which air traffic operates. A departure delay of more than 3 minutes could indicate a potential issue that may require immediate attention, such as an equipment malfunction, a pilot decision, or line congestion leading to the need for adjustments in traffic flow.

By advising ZAE promptly, controllers can ensure that the appropriate traffic management strategies or interventions are enacted to minimize disruptions and enhance the overall management of air traffic in the area.