What is required for the landing on a wet runway compared to a dry runway?

Landing on a wet runway generally requires 115% of the dry runway requirement due to decreased braking efficiency. Wet surfaces can significantly lengthen the required stopping distance because the tires have less grip on the wet pavement. The additional percentage accounts for this extra distance needed to safely bring the aircraft to a stop in wet conditions.

Aircraft performance charts typically provide landing distances required under various conditions, and when conditions are wet, pilots must factor in that extra margin for safety. This adjustment ensures that they have enough runway length available to stop safely, minimizing the risk of overrunning the runway, which is critical for maintaining safe operations.

Understanding this requirement is essential for pilots and dispatchers to make informed decisions during flight planning and approach, ensuring they consider environmental conditions that can affect landing performance.