What is the function of the Low-Level Wind Shear Alert System (LLWAS)?

The Low-Level Wind Shear Alert System (LLWAS) is specifically designed to measure wind speed and direction. Its primary function is to monitor low-level winds in the vicinity of an airport, which can be crucial for the safe operation of aircraft during takeoff and landing. Wind shear, which refers to a sudden change in wind speed or direction over a short distance, can pose significant hazards for aircraft, especially during critical phases of flight. By accurately measuring these parameters, LLWAS provides vital information that can help pilots and air traffic controllers take necessary precautions to ensure safety.

Other options might reference important functions related to aviation, but they do not pertain to the specific purpose of LLWAS. For instance, fuel efficiency and navigation system malfunctions are not monitored by LLWAS, and the system does not calculate aircraft speed. It is solely focused on gathering data about wind conditions, essential for preventing accidents and ensuring smooth operations at the airport.