Which term is commonly associated with GPS Overlays?

The term commonly associated with GPS overlays is LPV approaches. LPV stands for Localizer Performance with Vertical guidance, and it is a type of approach that provides lateral and vertical guidance using satellite data. GPS overlays utilize the precision of GPS technology to enhance and augment traditional approaches, effectively allowing pilots to conduct instrument approaches with greater accuracy and lower minimums than conventional non-precision approaches.

Other options, while relevant in the context of navigation and approach procedures, do not specifically pertain to the concept of GPS overlays in the same way. GNSS applications broadly encompass a variety of uses for Global Navigation Satellite Systems, whereas PBN procedures refer to Performance-Based Navigation, a more inclusive category of navigation methods that utilize various technologies, including GPS. NDB (Non-Directional Beacon) RWY approaches relate to older navigation aids and methods that do not integrate the modern precision offered by GPS overlays in the same manner. Therefore, LPV approaches are the most closely linked to GPS overlays in contemporary aviation practice.