Airborne wind shear detection and alert system
The airborne wind shear detection and alert system, fitted in an aircraft, detects and alerts the pilot both visually and aurally of a wind shear condition. A reactive wind shear detection system is activated by the aircraft flying into an area with a wind shear condition of sufficient force to pose a hazard to the aircraft.
Source: Wikipedia — Airborne wind shear detection and alert system (CC BY-SA 4.0)