How can you determine if a runway has a displaced threshold?

A displaced threshold on a runway is indicated by specific visual cues that help pilots understand the usable area of the runway. The presence of a white bar at the beginning of the runway signifies that the threshold is displaced. This bar marks the point where the landing distance begins but indicates that the actual beginning of the physical runway is located further down.

This configuration is important for safe operations, as it informs pilots that they cannot use the area before the white bar for landing. Thus, knowing that a white bar indicates a displaced threshold directly correlates to runway safety and landing procedures, making it the correct identification method for pilots or personnel assessing the runway.

While other options might involve methods of gathering information about the runway, they do not provide the immediate visual confirmation needed to identify a displaced threshold accurately.