What does CMWS cue to threats within its field of view?

The correct answer pertains to the capability of the CMWS (Common Missile Warning System) in detecting and responding to threats. CMWS is designed to enhance the survivability of aircraft by identifying missile threats using infrared sensor technology. It primarily functions to detect approaching infrared (IR) missiles and can cue countermeasures to protect the aircraft from being targeted.

The option relating to ATIRCM (Advancement in the Infrared Countermeasures) is specifically involved in this process. ATIRCM systems can employ methods like redirecting infrared energy to deflect incoming missiles. By cueing the ATIRCM, the CMWS provides vital threat information ensuring swift reactive measures are taken for the aircraft's defense.

This capability is crucial in military aviation where protecting the aircraft from incoming missile threats is a priority, thus highlighting the role of CMWS in situational awareness and counteraction against such threats. Choices that refer to radar or target designators relate to different functionalities that do not directly pertain to the CMWS's primary threat detection and countermeasure cueing role.