How does the E-2D Advanced Hawkeye detect threats?

The E-2D Advanced Hawkeye detects threats primarily through the use of electronically scanned array radar, which is a key feature of this advanced airborne early warning and control system. This radar allows the E-2D to detect both airborne and surface threats at substantial distances and in diverse environmental conditions.

The electronically scanned array radar system can automatically scan large areas and track multiple targets simultaneously, enhancing situational awareness for commanders. Additionally, it is capable of rapidly reorienting its beam to focus on specific areas of interest without the mechanical movement typically required by older radar systems. This enhances the speed and effectiveness of threat detection and tracking.

Other methods like passive infrared systems, visual identification, and acoustic detection are generally not the primary means of threat detection used by the E-2D. While those methods may have their own applications in various contexts, they do not match the comprehensive capabilities offered by the electronically scanned array radar in terms of range, accuracy, and functionality for air and surface surveillance.