What is "Ground Control" responsible for in air traffic control?

Ground Control is primarily responsible for managing traffic on the ground at airports. This includes directing aircraft during taxiing, coordinating the movement of ground vehicles, and ensuring safe distances between aircraft on the runway and taxiways. Ground controllers communicate with pilots regarding their movements on the airport surface, overseeing various operations from the time an aircraft lands until it is parked at the gate, and from when it's ready to depart until it reaches the runway for takeoff. This role is crucial for maintaining safety and efficiency in high-traffic airport environments.

The other options relate to different aspects of air traffic control. Monitoring aircraft altitude involves the responsibilities of radar controllers, who ensure that aircraft maintain safe vertical separation in the air. Providing flight plans is typically managed by a different sector or unit in air traffic control, where flight plans are filed and managed before takeoff. Controlling aircraft separation in the air is the responsibility of en route controllers, who manage the aircraft once they are in flight, ensuring safe horizontal and vertical distances are maintained between aircraft in the airspace.