What is the purpose of flares in military aircraft countermeasures?

• A. To jam radio communications
• B. Infrared countermeasures used by aircraft to counter infrared homing missiles
• C. Acoustic decoys for submarines
• D. Visual signaling for pilots

Answer: (B)

Flares are infrared decoys used to counter infrared-homing missiles by presenting a hotter target than the aircraft. The heat-seeking sensor in a typical IR missile looks for the hottest object in its field—normally the aircraft’s engine exhaust. When a flare is deployed, it creates a bright, intense infrared source that attracts the seeker away from the aircraft, giving the pilot time to maneuver or escape. This is a specific form of infrared countermeasures designed to defeat heat-seeking missiles.

The other options don’t fit because flares aren’t intended to jam radio communications, they aren’t acoustic decoys for submarines, and they aren’t used for visual signaling for pilots.