What type of guidance do GPS Overlays permit during conventional approaches?

GPS overlays allow for GPS-based lateral guidance during conventional approaches. This means that while flying an approach that is typically guided by traditional navigation aids such as VOR or NDB, pilots can use GPS technology to provide lateral guidance in conjunction with those traditional systems. This integration enhances situational awareness and improves the precision and reliability of approach procedures.

When a GPS overlay is used in conjunction with conventional approaches, it enables pilots to track the final approach course accurately. The GPS receiver provides the aircraft's position information relative to the published approach path, allowing for better lateral navigation and an improved ability to maintain the correct flight profile. This is especially beneficial in conditions of limited visibility or during complex airspace operations.

The use of GPS overlays effectively bridges traditional navigation methods with modern technology, enhancing the overall safety and efficiency of flight operations without relying solely on older navigation aids.