The Navy is canceling the troubled USS Boise submarine overhaul after costs neared $3 billion, redirecting resources to newer Virginia-class submarines.

One of the youngest Los Angeles-class nuclear attack submarines will be inactivated after waiting more than a decade for an overhaul, the Navy announced on Friday. USS Boise (SSN-764), currently in a drydock at HII Newport News Shipbuilding,

British and Norwegian militaries led a weekslong operation to deter Russian submarines in the North Atlantic, the U.K. military said.

John Healey said warships and military aircraft forced Russia to quit activity in UK waters near vital undersea cables and pipelines.

John Healey, the defense secretary, said the vessels were gathering information about undersea pipelines, and said he believed President Vladimir V. Putin “would want us to be distracted by the Middle East.

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 President Vladimir Putin as he accused the Kremlin of using three underwater vessels to gather information on Britain following previous sabotage attempts in Europe.

Unlike your car, a submarine cannot use GPS to reach its destination, as the technology doesn't work underwater. Here's how they navigate instead.

Although exact numbers are difficult to pin down, estimates suggest Iran's navy has a fairly large number of subs in its fleet that span across four classes.

The U.S. Navy is confronting an unexpected shortfall of more than 2,000 missile launch cells as four aging Ohio-class guided-missile submarines approach their mandatory retirement dates. The discovery,