How is a paved pre-threshold area greater than 60 m in length but not suitable for use by aircraft marked?

• A. White X
• B. Yellow X
• C. Yellow chevrons pointing towards the threshold
• D. White arrows directing approaching aircraft to the displaced threshold

Answer: (A)

A white X across a pavement marks that the area is closed to all aircraft. When a pre-threshold area exists but is not usable for landing, takeoff, or taxiing, it’s indicated with a white cross so pilots won’t risk using it. The length of the area (more than 60 meters) doesn’t change the marking—the closed portion is simply marked this way to convey it must not be used.

For contrast, yellow chevrons indicate areas not intended for aircraft use (such as blast pads or non-runway areas) but aren’t treated as closed runway segments; arrows indicating a displaced threshold show a relocated threshold and how the area can be used for takeoff or rollout in certain directions; and yellow Xs are typically used for taxiway closures.