After some much-needed upgrades and a full series of tests, one of the U.S. Navy's most capable subs is now back in service.

The unmanned sea drones will be able to detect mines, harass enemy submarines and broaden the Navy’s ability to monitor vast ...

A submarine dive to 500 meters below the ocean explores a deep sea environment with low light and intense pressure. The video ...

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China's submarine fleet has always been big, but it's also comprised mainly of vessels with diesel-electric submarine engines, and that class of subs needs to surface regularly to recharge its ...

Bebe took in the sights surrounding him — saltwater, parrotfish, coral reefs and bubbles. Unbeknownst to the parrot, he might’ve been the first of his species to spend time underwater in the Atlantic ...

Satellite imagery released by the UK MoD showing Russia's Olenya Guba naval base, including what is likely the Delta IV Stretch submarine Podmoskovye (insert bottom ...

LONDON (AP) — Britain and Norway conducted a weekslong military operation to deter Russian spy submarines near undersea cables in the North Atlantic, the U.K. defense chief said Thursday, accusing ...

Russia deployed three submarines to spy on the UK’s critical undersea pipelines in the northern Atlantic, British officials revealed on Thursday. UK Defense Secretary John Healey called out Russian ...

U.K. Defense Minister John Healey warned Russian President Vladimir Putin of "serious consequences" Thursday after revealing a weeks-long military operation to deter Russian meddling in the North Sea.

This is read by an automated voice. Please report any issues or inconsistencies here. UK and Norway led a multi-week military operation to deter Russian spy submarines near critical undersea cables in ...

The Royal Navy has deterred Russian submarines identified in the vicinity of undersea cables and other critical under water infrastructure. A Russian attack submarine and specialist submarines from ...