Which of the following is NOT a type of counterfire radar?

The XRG-75 is not a type of counterfire radar. Counterfire radar systems are designed specifically for detecting and locating enemy artillery and rocket fire, allowing for timely responses to threats. The TRQ-36, TRQ-53, and TRQ-50 are all legitimate types of counterfire radar systems utilized by military forces for their ability to track incoming projectiles and pinpoint the source of enemy fire.

The TRQ-36 is known for its effectiveness in real-time artillery locating, enabling rapid response and adjustment of friendly forces. The TRQ-53 is recognized for its advanced target acquisition and tracking capabilities, while the TRQ-50 contributes with its integration and interoperability with various fire support systems. Each of these radars plays a vital role in enhancing battlefield awareness and operational effectiveness. In contrast, the XRG-75 does not fall under this category, distinguishing it as the correct answer to the question.