What is the primary purpose of a STAR?

The primary purpose of a Standard Terminal Arrival Route (STAR) is to facilitate the transition between en route and terminal areas. This means that STARs are specifically designed to provide a structured and efficient path for aircraft leaving the en route phase of flight and approaching an airport for landing. By using STARs, air traffic controllers can manage air traffic flow more effectively, ensuring that aircraft can descend safely and at optimal intervals as they approach the terminal airspace.

STARs help in reducing the complexity and workloads for pilots and controllers during busy arrival phases, allowing aircraft to join the traffic pattern in a more organized manner. This organization is crucial for maintaining safety and efficiency in air traffic management, especially around busy airports.