WAGS

Air Safety Week, Feb 14, 2005

The MD11 is equipped with a sophisticated Windshear Alert and Guidance System (WAGS) that provides detection, alerting and guidance through windshear. Wind and inertia information is detected by the aircraft's Central Air Data Computers and by the Inertial Reference Systems and transmitted to the Flight Control Computers (FCCs) for windshear detection, warning and guidance. On approach, the aircraft enters the protection envelope on passing 1,500 feet radio altitude -- but exits it on descending below 50 fee radio altitude. (italics added)

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