Defensive Aids System

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Defensive Aids System (DAS) is a military aircraft system which defends an aeroplane from attack by surface-to-air missiles, air-to-air missiles and anti-aircraft artillery. DAS typically comprises of chaff, flares, and electronic countermeasures combined with radar warning receivers to detect threats. On some modern aircraft, the entire system is integrated and computer-controlled, allowing an aircraft to autonomously detect, classify and act against a potential threat to its safety.

Some attack helicopters such as the British Army WAH-64 even feature the capability to fire air-to-ground missiles or guns back at local threats.

DAS include now include active protection as used in Rafale aircraft.


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