Which system is primarily responsible for improving precision landing approaches?

The Local Area Augmentation System (LAAS) and the Ground-Based Augmentation System (GBAS) are both designed to enhance the accuracy and integrity of positioning information, which is particularly critical for precision landing approaches.

LAAS operates by taking GPS signals and augmenting them through a network of ground stations. It provides corrections to the GPS signals, enabling aircraft to achieve higher precision during the approach and landing phases. This results in improved vertical and horizontal accuracy, which is essential for safely navigating in complex environments such as airports.

Similarly, GBAS is a system that supports precision approaches by using a ground reference station that broadcasts differential GPS corrections to aircraft in the vicinity. This allows for continuous updates to the GPS data, further refining the accuracy required for landing.

Both LAAS and GBAS serve the same fundamental purpose of improving navigation precision during landing, making them integral to modern aviation safety and efficiency. Therefore, the correct answer incorporates both systems as they collectively enhance precision landing approaches.