NBC News joined a NATO flotilla as it sailed the icy sea hunting Russian saboteurs accused of targeting undersea cables.

A nuclear-powered submarine of the Royal Navy has resurfaced and returned to port after completing a record-breaking 204 days at sea. After spending over six months underwater, the Vanguard-class ...

A hidden ecosystem of giant sea spiders, octopuses, and other stunning sea creatures shows how life can flourish even when sealed off from the surface by a thick layer of ice.

Britain has laid the keel for the Royal Navy's largest-ever submarine. At BAE Systems's Barrow-in-Furness facility, the ...

EXCLUSIVE: Warship HMS Ambuscade, which served with distinction during the Falklands War, is set to return home to her birthplace on the banks of the Clyde, carrying with it tales of valour and a ...

The Turkish Navy has successfully test-fired the submarine-launched version of the country's indigenously developed Atmaca ...

London — The Monday collision between a cargo ship and an oil tanker in the North Sea "has a high risk of being an environmental disaster in really important protected areas," Naomi Tilley ...

The crash ignited a huge fire, which is still burning on one of the vessels in the North Sea, about 10 miles off the coast of Hull, a busy port and fishing center. Dozens of people were rescued ...

North Korea’s newly unveiled nuclear-powered submarine, reportedly made with ... compact nuclear reactor capable of withstanding deep-sea pressure, the vessel could be deployed faster.

As the new American president shook allied capitals all over the world, a Virginia-class submarine — the USS Minnesota — arrived at a port in western Australia for the first of many routine Australian ...

An alarming new study by NASA has found that parts of California, including San Francisco and Los Angeles, are sinking into the ocean at a shocking rate, exacerbating the effects of sea level rise.