What does LAAS stand for?

• A. Local Area Augmentation System
• B. Local Area Observation System
• C. Local Aviation Augmentation Service
• D. Local Area Auto System

Answer: (D)

Local Area Augmentation System is a GPS augmentation system used to improve accuracy, integrity, and availability of navigation signals within a localized area around an airport. It works by using ground-based sensors and processing to compute differential corrections and integrity data, which are broadcast to aircraft to support precision approaches and landings (often referred to internationally as GBAS, Ground-Based Augmentation System). The other phrases don’t describe a GPS augmentation concept for aviation in a local area, so they don’t fit the idea of enhancing navigation signals for precision operations near airports.