What should a controller do if they intend to delay an aircraft?

When a controller intends to delay an aircraft, notifying the supervisor or Traffic Management Unit (TMU) coordinator is critical for several reasons. This action ensures that the delay is documented and managed within the broader context of air traffic control operations.

The TMU plays a vital role in coordinating traffic flow, and informing them allows for better management of the overall airspace system. This communication helps in understanding the broader impact of the delay and in coordinating with other controllers, which is essential to minimize congestion and ensure safe operating conditions.

Moreover, keeping the supervisor informed allows for oversight and support in case further actions need to be taken regarding the delay, including adjustments to other aircraft or managing potential impacts on arrivals and departures at affected airports. This maintains safety and efficiency in the air traffic management system.

In contrast, while it is important to inform the pilot of any delay, it is more immediate to ensure that any necessary systemic coordination is in place first. Arranging an alternate landing is a more extreme measure that generally applies when a delay becomes a situation that cannot be accommodated safely at the destination. Issuing a warning to other flights would typically not be necessary just for the delay of one aircraft and may not contribute to effective traffic management.