USS Halibut began life as a Regulus cruise-missile submarine, but its real legacy came after a radical refit turned it into a ...

Russia’s Sierra II-class attack submarines are often hyped as some of the most advanced boats ever built: titanium twin hulls ...

A Russian submarine traveling home from the Mediterranean has spent much of its journey surfaced. A NATO official said the activity is unusual. It's not ideal for a submarine to travel this way. The ...

The author reminds that the Project 945A Condor nuclear submarines have a double-hulled design made of durable titanium alloy, thanks to which they are capable of diving to great depths and have low ...

NATO chief Mark Rutte mocked Russia on Monday over the "limping" condition of one of its submarines as Russian authorities denied it had been forced to surface because of technical problems. Russia's ...

A UK patrol ship has intercepted a Russian corvette and a tanker after shadowing them through the English Channel, the ...

To Russia, the Yantar is an oceanic research vessel - to others, including the UK, it's a spy ship, and a worry for Britain's ...

A team of litter-picking scuba divers have recovered what is believed to be a Russian tracking device off the Welsh coast.

UK defence secretary John Healey has warned President Vladimir Putin that the UK has lowered the rules of engagement in the ...