Which system is generally used for more precise navigation in a limited area?

The system used for more precise navigation in a limited area is the Local Area Augmentation System (LAAS). LAAS is designed to enhance the accuracy and reliability of GPS signals in a localized region, such as an airport. It achieves this by using a network of ground-based reference stations that monitor GPS satellite signals and provide real-time corrections to the navigation information. This allows for much higher precision, often within a few centimeters, compared to standard GPS, which can have accuracies of several meters.

LAAS is particularly beneficial for aviation applications, enabling more reliable approaches and landings at airports, especially in challenging weather conditions or when other navigational methods are not feasible. Its localized nature is what distinguishes it from other systems like WAAS, which provides broader regional coverage, but not the same level of precision in a limited area.