The RSDS warns the aircrew of potential threats from detected signals of what type?

The correct choice relates to radar signals, which are essential for the Radar Signal Detection System (RSDS) in warning aircrew of potential threats. The RSDS is designed to detect and analyze various radar emissions, which can indicate the presence of hostile aircraft or ground-based radar systems. By identifying these radar signals, the system allows aircrew to assess threats and take appropriate countermeasures.

Radar is a particularly critical type of signal in military aviation because it provides the capability to track and target aircraft at significant distances, allowing for early warning of impending threats. This makes it imperative for aircrew to be aware of radar activity in their vicinity.

While laser, infrared, and acoustic signals are important in different contexts—such as for missile warning systems or underwater navigation—they are not the primary focus of the RSDS. The system specifically caters to identifying and responding to radar signals, which is fundamental for situational awareness and ensuring the safety of the aircrew in potentially hostile environments.