The planned landing weight at the destination airport shows an actual landing distance of 3000 feet in still air. What is the minimum effective dry runway length required?

• A. 5000 feet
• B. 3000 feet
• C. 6000 feet
• D. 4500 feet

Answer: (A)

When planning a landing, you don’t rely on the raw landing distance alone. You apply a safety margin to account for braking effectiveness, pilot technique, potential runway slope, surface conditions, and other real‑world factors. For dry runways, a commonly used planning factor is roughly 5/3 of the calculated landing distance.

So, with a landing distance of 3000 feet in still air, multiply by 5/3: 3000 × 5/3 = 5000 feet. That becomes the minimum effective dry runway length you’d want to have available at the destination.

The other options don’t meet that margin: 3000 is the basic landing distance with no added safety buffer, 4500 is only 1.5 times the distance, and 6000, while more than enough, isn’t the minimum.