What do displaced threshold markings on a runway indicate?

A displaced threshold moves the landing point down the runway from the physical pavement end, usually because of an obstruction on the approach, noise abatement, or the runway's declared distances. The pavement before the threshold is marked with white arrows leading to a solid threshold bar, and it remains usable — aircraft may take off from it and may roll out over it after landing beyond the threshold — but no landing may touch down before it. For a remote pilot the practical significance is what a displaced threshold usually implies about the approach: it is often displaced precisely because aircraft must clear something, so arriving aircraft on that runway are lower over the ground further out than the runway geometry alone would suggest. That extended low approach path is where an unmanned operation near the field would conflict. The distinction from a closed runway matters too, since a closed runway is marked with a large X and used by nobody.

The pavement before a displaced threshold may be used for takeoff and for rollout after landing, but no landing may touch down before the threshold.

A displaced threshold relocates the landing threshold down the runway, commonly because of approach obstructions or noise abatement. Pavement before it is available for takeoff and rollout but not for landing touchdown.

Takeoff Yes, Landing No. The pavement still works — you just cannot touch down on it.

White arrows leading to a solid bar mark a displaced threshold; chevrons mark a blast pad or stopway that is not usable at all.

• •Reading a displaced threshold as a closed runway
• •Confusing arrow markings with chevrons on a blast pad
• •Ignoring what the displacement implies about the approach path