Which combination of actions best describes steps a controller should take to manage a potential runway incursion at low visibility?

Which combination of actions best describes steps a controller should take to manage a potential runway incursion at low visibility?

• A. Issue clear taxi instructions, ensure hold short commands, provide hold short alignment, maintain surveillance, coordinate with tower, and issue hold instructions if needed
• B. Rely on pilot to correct themselves and clear the runway
• C. Increase aircraft speed to clear the runway quickly
• D. Issue a general alert to all pilots without specific instructions

Answer: (A)

In low visibility, preventing a runway incursion comes from giving precise, unambiguous taxi guidance, enforcing hold points, and keeping a tight, coordinated picture of where every aircraft is. The best approach is to provide clear taxi instructions that spell out the exact route from the aircraft’s current position to the intended point near the runway, along with explicit hold-short commands so the aircraft does not enter the runway until you’ve cleared it. Adding hold-short alignment helps ensure the aircraft is properly positioned and oriented relative to the runway while you verify the situation and await further clearance. Maintaining surveillance is essential to track each aircraft’s position continuously, so you can spot potential conflicts as soon as they arise. Coordinating with the tower keeps everyone on the same page about runway status, arrivals, and departures, minimizing the chance of conflicting instructions. If the risk persists, issuing hold instructions escalates the protection—forcing the aircraft to stop at a safe point until you can provide a safe clearance. This combination is the most effective because it combines precise instructions, physical prevention of entry into the runway, active monitoring, and coordinated, timely communication with the tower. The other options leave essential safeguards behind: relying on pilots to self-correct ignores low-visibility risks; trying to speed things up can force risky movements; and a general alert without specific instructions fails to control ground movements or prevent an incursion.

In low visibility, preventing a runway incursion comes from giving precise, unambiguous taxi guidance, enforcing hold points, and keeping a tight, coordinated picture of where every aircraft is. The best approach is to provide clear taxi instructions that spell out the exact route from the aircraft’s current position to the intended point near the runway, along with explicit hold-short commands so the aircraft does not enter the runway until you’ve cleared it. Adding hold-short alignment helps ensure the aircraft is properly positioned and oriented relative to the runway while you verify the situation and await further clearance.

Maintaining surveillance is essential to track each aircraft’s position continuously, so you can spot potential conflicts as soon as they arise. Coordinating with the tower keeps everyone on the same page about runway status, arrivals, and departures, minimizing the chance of conflicting instructions. If the risk persists, issuing hold instructions escalates the protection—forcing the aircraft to stop at a safe point until you can provide a safe clearance.

This combination is the most effective because it combines precise instructions, physical prevention of entry into the runway, active monitoring, and coordinated, timely communication with the tower. The other options leave essential safeguards behind: relying on pilots to self-correct ignores low-visibility risks; trying to speed things up can force risky movements; and a general alert without specific instructions fails to control ground movements or prevent an incursion.