Controllers must visually scan runways to the maximum extent possible. What type of controller is primarily responsible for this task?

The primary responsibility for visually scanning runways falls to the local controller, who is specifically tasked with managing aircraft movements on the runway and in the adjacent airspace. This role is critical because the local controller needs to ensure the safety and efficiency of takeoffs and landings, monitor aircraft on the runway, and coordinate with ground control for any surface movements.

Local controllers utilize visual observation as part of their routine duties to enhance situational awareness and respond quickly to any unexpected situations, like runway incursions or weather changes affecting landing conditions. Their position in the tower allows them to have a direct line of sight to the runways, which is essential for maintaining operational safety.

Other controllers, such as ground controllers, manage movements on the taxiways and the area around the airport but do not primarily focus on runway activity. Tower controllers also interact with local controllers but are often involved in broader operations that include airspace management. Meanwhile, approach controllers handle arriving aircraft from a distance, focusing on sequencing and spacing for safe landings rather than direct runway observation.