True or false: A displaced threshold shortens the landing distance.

• A. True
• B. False
• C. It depends on aircraft type.
• D. Only for military runways.

Answer: (A)

A displaced threshold moves the landing point forward, so you must touch down beyond the threshold. The part of the runway in front of the displaced threshold isn’t used for landing, though it can be used for takeoff and for rollout after landing. That means the landing distance available (LDA) is reduced by the length of the displaced portion, making the landing distance shorter than the full runway length. This concept holds across typical general aviation and commercial operations; it’s not tied to aircraft type or military use.