During non-radar operations, what must ZAE ensure about communication changes for arrivals?

The requirement for communication changes during non-radar operations ensures that there is timely coordination between air traffic controllers and pilots. In this context, making communication changes at least 5 minutes before Dinky allows for sufficient time to manage the transition of control and provide necessary instructions to the arriving aircraft. This specific time frame is crucial to maintain safety and efficiency, allowing pilots to prepare for their approach and comply with the air traffic control directives. It ensures that both the controller and the pilot are synchronized, reducing the risk of miscommunication that could potentially lead to unsafe situations.

The other options do not meet the necessary protocol for effective communication during these operations, making it important to understand the timing and rationale behind initiating communication changes at this specified interval.