What is the requirement to perform a low-visibility landing?

• A. 115% of landing distance, same as wet runway
• B. 120% of landing distance
• C. 100% of landing distance
• D. 125% of landing distance

Answer: (A)

When visibility is poor, you need a safety margin to ensure you can still land and stop within the available runway even with reduced perception and braking effectiveness. The standard approach is to require enough runway that it equals 115% of the calculated landing distance. In other words, you must have at least 1.15 times the landing distance available. This margin aligns with the practice for degraded braking conditions, such as a wet runway, where stopping distance is extended, so the same 15% cushion is used.

So, the requirement is to have 115% of the landing distance available, providing a consistent safeguard for low-visibility operations. The other numbers would either give too little cushion or more cushion than typically required.