Which tracking method allows for coast tracking using flight plan data?

The correct choice is FLAT Tracking, which refers to a method where flight plans are used to track an aircraft even when it is not in active radar contact. FLAT Tracking stands for Flight Plan Automated Tracking, and it employs the data from filed flight plans to predict the position of an aircraft based on its expected trajectory, providing a means for controllers to maintain awareness of an aircraft's movement during coasting phases or when there is a temporary loss of radar information.

This method is particularly useful when dealing with extended areas where radar coverage might be limited or intermittent, allowing air traffic controllers to manage and track aircraft effectively by relying on pre-established flight plan data. It ensures continuity of tracking, enhancing safety and operational efficiency in the airspace.

In contrast, the other tracking methods—such as Radar Tracking, Manual Tracking, and Visual Tracking—focus on real-time information either through electronic means, direct observation, or with human input without utilizing the predictive capacity enabled by saved flight plans. These alternatives do not facilitate coast tracking in the same effective manner that FLAT Tracking does.