Local controllers must visually scan runways to the maximum extent possible.

• A. to the maximum extent possible
• B. only during daylight
• C. continuously
• D. periodically

Answer: (A)

Maintaining high situational awareness through extensive runway visual scanning is essential for safety. Local controllers should look for anything that could affect safe operations—aircraft, vehicles, personnel, wildlife, or debris—across the runway and surrounding areas. The phrase “to the maximum extent possible” signals you should perform as thorough a scan as conditions allow, considering workload, weather, and other duties. It isn’t limited to daylight, and it isn’t meant to be strictly continuous or strictly periodic; rather, you maximize visual coverage whenever feasible to detect hazards early and prevent incursions. The other options would create gaps or unduly restrict scanning, whereas the best practice is to scan to the maximum extent possible.