What is the primary sensor on the Stinger missile?

• A. A UV sensor
• B. A cooled infrared seeker that detects target heat and provides guidance information.
• C. A radar seeker
• D. An acoustic sensor

Answer: (B)

The main sensor used by the Stinger is a cooled infrared seeker that detects heat from the target and uses that information to guide the missile. This infrared (IR) sensing is passive, meaning the missile does not emit signals and simply homes in on the heat signature of the aircraft—typically engine exhaust and other warm surfaces. Cooling the infrared detector makes it much more sensitive and able to distinguish the target from the background across different lighting and weather conditions, which is crucial for reliable lock-on and tracking at various ranges.

Because the system relies on heat detection, other sensor types aren’t used here. A UV sensor would look for ultraviolet signatures, which aren’t as robust across day/night cycles and backgrounds. A radar seeker would require emitting radio energy and is more detectable and bulkier for a portable system. An acoustic sensor isn’t applicable for air targets. The cooled infrared seeker provides the right combination of passive detection, target tracking, and guidance data for the missile.