For decades, submarines have thrived on one key advantage: invisibility. Deep below the ocean surface, they operate silently, shielded by layers of water and advanced acoustic stealth technology. But ...

China is on a mission to become the world’s dominant superpower by 2049. That goal is driving a desire to build a world-class navy that can challenge the United States. To make it even stronger, ...

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The new system relies heavily on passive acoustics—technology that simply listens, rather than sending out signals of its own such as sonar pings. Australia is building an integrated undersea ...

Russia’s “Harmony” project is the latest salvo in the battle between underwater access and anti-access efforts. The United States will need new innovations of its own to fight back. Two weeks ago, The ...

Sound is the primary means of tracking subs in vast ocean expanses, and research shows that it’s behaving differently as the seas warm. By Jacob Judah Reporting from London Submarines are among the ...