What must be done with the filed routing of aircraft after radar identification?

The correct answer emphasizes the importance of returning to the filed routing of an aircraft once the conditions permit. After radar identification, air traffic control often issues changes to an aircraft's routing for various reasons, such as traffic management or weather conditions. However, if the situation improves and allows for a return to the filed routing, this action ensures that the aircraft follows its originally intended path, which is crucial for maintaining safe separation from other air traffic and adhering to airspace structure.

This practice supports efficient air traffic flow and minimizes potential delays for the pilot. Returning to the filed routing once conditions allow helps to maintain a predictable flight experience for pilots, while also fulfilling regulatory and operational responsibilities to ensure safety and efficiency in airspace management. It's important for controllers to monitor changes in conditions continuously and revert to the filed routing to support the pilot's planned course of action when circumstances allow.