They will also monitor air traffic with the help of radar, from a screen in the control tower. The controller will use the radar screen to chart a safe and correct flight path for aircraft approaching and leaving the airport.
He will also provide assistance to pilots for in-flight emergencies, related to technical difficulties or related to passengers. For example, if a passenger has health problems on board, the controller will facilitate a priority landing and make sure that emergency medical services are available on the ground. A few air traffic controllers will also be in charge of charting safe and congestion-free flight plans to prevent in-air collisions and ensure smooth passage of aircraft.