What characteristic of the RHI scope aids in determining the position of a target?

The characteristic of the RHI (Range-Height Indicator) scope that aids in determining the position of a target is the presence of movable markers. These movable markers allow operators to adjust their position in relation to the displayed data on the scope. By indicating specific ranges and heights of potential targets, operators can easily track and interpret the movement of objects in the airspace.

Movable markers are essential for real-time situational awareness since they can be dynamically repositioned as targets change altitude or distance. This feature enhances the operator's ability to determine the location and trajectory of various airborne objects, thereby providing crucial information for decision-making in navigation or tracking scenarios.

In contrast, static reference points and digital numerical readouts provide information but may lack the interactivity needed for precise target tracking. Graphical overlays can assist in visual representation but do not offer the flexibility and responsiveness that movable markers provide.