What is one of the main tasks of approach controllers?

The main task of approach controllers is to ensure a safe and efficient transition of aircraft from en-route flight to landing. This involves issuing initial clearances that enable aircraft to approach the airport properly, aligning them with the approach procedures and managing their descent.

By providing initial clearances, approach controllers direct the aircraft on the appropriate paths for landing, ensuring that they maintain safe separation from other airborne traffic and conform to any specific airspace regulations. This is crucial for maintaining an orderly flow of air traffic as multiple flights converge for landing at an airport. The responsibility is vital, as it helps to prevent potential conflicts between aircraft and ensures a smooth arrival process.

In contrast, the other tasks listed pertain to different areas of air traffic management. Clearing aircraft for takeoff is part of the responsibilities of ground controllers rather than approach controllers. Ground traffic management is also a responsibility of ground controllers, who manage activities on the airport surface. Coordinating with international air traffic relates to the responsibilities of area or en-route controllers, who manage flights at higher altitudes and over broader areas, rather than focusing specifically on landing approaches at an airport.