What potential issue must controllers be aware of during ALTRV operations?

During ALTRV (Alternate Route) operations, controllers must be particularly vigilant about potential conflicts with other air traffic. ALTRV allows for the temporary rerouting of aircraft from their originally assigned flight paths due to various reasons, such as weather conditions or emergencies. This adjustment can increase the complexity of air traffic management because it may involve changes in altitude, routing, and timing.

Controllers need to maintain situational awareness to ensure that the newly assigned routes do not conflict with other active flights in the airspace. This is crucial to prevent mid-air collisions and ensure safe separation between aircraft. In essence, the dynamic nature of ALTRV operations can lead to unexpected interactions between various aircraft, and it is the responsibility of air traffic controllers to mitigate these risks by closely monitoring and coordinating traffic.

Other options, while they can be relevant to air traffic operations in different contexts, do not directly pertain to the unique challenges posed by ALTRV scenarios. For example, overbooking of flights, exceeding weight limitations, and delayed maintenance procedures are primarily operational concerns that are managed by airlines and maintenance crews, rather than being immediate issues that arise during ALTRV operations.