Students must update flight plan data for aircraft routed through the ATAs at specific airports. What routing may be used for updates?

The choice of routing labeled as MLU087031..KMLU is highlighted as the correct update for flight plan data routed through the ATAs at specific airports. This format effectively showcases the use of proper waypoints to initiate an update.

In this instance, the issuance of MLU087031 establishes a clear starting point that leads directly to KMLU, providing a defined route that adheres to Standard Operating Procedures (SOP) guiding flight planning and data updates. This clarity ensures that air traffic controllers and flight planners can accurately identify the path taken by the aircraft, which is essential for both safety and efficiency when managing air traffic in congested areas.

In contrast, the other options present routing that may not align with the required format or could lead to ambiguities. For instance, the options that start or end with identifiers that do not specify an appropriate route for updates do not maintain the same level of clarity and may fail to comply with SOP requirements for updating flight data through the ATAs. Therefore, MLU087031..KMLU stands out as the most suitable routing option for this specific scenario.