These rules have developed over centuries as states sought to regulate the conduct of conflict at sea while still allowing navies to operate effectively.

The Torsk's sinking of the Japanese vessel marked the last U.S. submarine kill for over eight decades - that is until March 3, 2026.

Lockheed secured a potential $480 million Navy contract for AN/SQQ-89A(V)15 anti-submarine warfare system engineering support.

Submarines have been used in warfare for centuries. Undersea warfare has come a long way since the first experimental contraptions took to the seas. The modern nuclear-powered submarine represents a huge investment in money, resources, and time. There is ...

China's submarine fleet is improving, making advancements in stealth. In a war, China's subs could put up a tough fight in the First Island Chain, analysts say. China has also prioritized sensors and other anti-submarine warfare capabilities in the region.

DARTMOUTH, NS, Dec. 3, 2025 /PRNewswire/ -- Ultra Maritime proudly announces a significant advancement in hybrid anti-submarine warfare (ASW) innovation for allied navies with the contract award of Sea Tracker – a modular, containerized submarine ...

The introduction of the submarine to naval warfare reshaped planning and doctrine. While typical engagements relied on guns and precision, the submarine didn’t need to concern itself with being as well armed as a dreadnought or destroyer. It could strike ...

The USS Lionfish was commissioned in 1944 and earned one battle star for service in World War II. It sank a Japanese submarine, rescued the crew of a B-29 bomber, and served as a training submarine. The Balao-class submarine is now a museum docked at Battleship Cove in Fall River, Massachusetts.

Sri Lanka's navy says around 140 people are feared missing after a military vessel went down off its southern coast.