What does IR signature mean in relation to Stinger’s seeker?

• A. The color of the target.
• B. The heat profile emitted by a target that the IR seeker detects to guide the missile.
• C. The altitude of the target.
• D. The speed of the target.

Answer: (B)

IR signature is the heat pattern a target emits that the infrared seeker can sense. For Stinger, the seeker detects infrared radiation from heated surfaces, especially engine exhaust, creating a heat profile that stands out against the cooler background. The missile follows this heat signature to lock onto and track the aircraft, using the brightest, hottest parts to guide its flight. It’s not about visible color, nor directly about altitude or speed—the detector is responding to heat emitted by the target, which is what the seeker uses to steer.