Which ATC unit is responsible for ground control at EFTA?

The correct answer is the Academy Ground (118.700 MHz), as this frequency is specifically designated for ground control operations at EFTA (which stands for a specific airfield or terminal area). Ground control focuses on managing the movement of aircraft on the ground, including taxiing, takeoff sequences, and other ground maneuvering. This ensures safety and efficiency during ground operations by providing pilots with the necessary instructions and clearances.

In contrast, the other options listed serve different functions within the air traffic control environment. Academy Delivery, while also important in the overall air traffic system, is typically used for providing clearances and initial flight plans to departing aircraft rather than for ground movement. Academy Tower manages active runway operations and airborne traffic during takeoffs and landings, while Academy Approach handles arrival traffic, guiding incoming aircraft as they transition from en route to landing phases. Each of these roles is crucial, but they do not encompass the specialized ground control responsibility that the Academy Ground frequency fulfills.