What symbol indicates the final approach fix on a non-precision approach?

The symbol that indicates the final approach fix on a non-precision approach is the Maltese Cross. This symbol is universally recognized in aeronautical charts and represents the point where the aircraft transitions to the final descent segment of the approach. The final approach fix is critical as it marks the point where the pilot should be stable and aligned with the runway for landing. It typically precedes further guidance to the runway, often relying heavily on the pilot's approach and landing skills rather than electronic guidance, which is why knowing the symbol is essential for pilots navigating non-precision approaches.

In contrast, the hollow circle typically designates a VOR waypoint, the diamond may represent a waypoint or navigational aid without a specific approach function, and the square is often used for other navigational or operational purposes but does not signify the final approach fix in non-precision approaches.