If unable to comply with the next controller's request, what must occur?

When a controller makes a request that cannot be complied with, coordination is essential to ensure safety and operational efficiency. The protocol for responding to an unfulfilled request emphasizes the necessity of clear communication between air traffic control units. This enables controllers to understand the limitations or issues that prevent compliance, allowing them to provide alternative instructions or solutions.

Coordination not only helps maintain the flow of air traffic but also ensures that all relevant parties are aware of the situation. By engaging in coordination, pilots and air traffic controllers can collaboratively work towards a solution that keeps both safety and operational effectiveness as a priority.

In contrast, simply ignoring a request could lead to misunderstandings and potential safety risks. Documentation, while important in various aspects of aviation operations, is not the immediate response when a request cannot be fulfilled. Referring the request without coordination may overlook the necessity of direct communication, which could exacerbate the situation. Therefore, coordinating with the next controller is the proper and standard operating procedure in such cases.