China’s Deep-Sea Radar Breakthrough: Acoustic Sensing and the Rewiring of Undersea Warfare

Improved Introduction: From Acoustic Stealth to Acoustic Transparency For over a century, the ocean has provided submarines with a natural shield—an acoustic barrier that isolates the underwater domain from threats above. This separation has defined naval warfare doctrine: aircraft hunt, submarines evade. But that boundary is beginning to erode. A recent breakthrough by researchers from…