Which system detects missile launches and alerts the crew?

The Missile Warning System (MWS) is specifically designed to detect missile launches by analyzing infrared signatures or other pertinent indicators associated with missile threats. It serves as an early warning system for flight crews, providing alerts regarding potential incoming missiles. This capability is crucial for situational awareness and allows for timely evasive actions or countermeasures, enhancing crew safety.

In contrast, the Infrared Counter Measure Set (IRCM) focuses on deflecting or misleading infrared-seeking missiles rather than detecting them. The Electronic Warfare System (EWS) encompasses a wider range of capabilities, including jamming and electronic countermeasures, but is not solely dedicated to missile detection. The Radar Warning Receiver (RWR) detects radar signals from surface-to-air or air-to-air threats, but it does not specifically focus on identifying missile launches. Thus, the MWS stands out as the appropriate answer for detecting missile launches and alerting the crew.