What is the primary function of the Extended Computer Display System (EXCDS)?

The Extended Computer Display System (EXCDS) is designed primarily to manipulate and display flight plans. This system integrates various data inputs, such as route information and navigation data, allowing pilots and air traffic controllers to have a comprehensive view of the flight plan in real-time. EXCDS enhances situational awareness, which is crucial for navigation and flight management.

By providing detailed graphical representations of flight paths, waypoints, and other pertinent navigation data, the EXCDS supports decision-making processes and ensures that both pilots and air traffic control can track flight progress effectively. This makes it a vital tool in modern cockpit equipment, streamlining operations and improving safety in aviation.

In contrast, the other options pertain to different aspects of aviation operations. For example, tracking aircraft on final approach is a more specific function usually associated with radar systems; ground control communications focus on the interaction between ground personnel and aircraft; and analyzing air traffic patterns typically involves different types of data analytics tools that assess traffic flow rather than manipulating flight plans.