A submarine returned home to the Clyde today following the longest ever patrol ... for the crew to spend underwater. This submarine was relieved in the last few days by another boat that sailed ...

Submariners have made history with what is believed to be the longest deployment ... after a remarkable 204 days submerged, as reported by Navy Lookout. The submarine, thought to be HMS Vanguard ...

Submariners have returned from what is believed to be the longest ... submarine in Royal Navy history. A Vanguard-class boat reportedly returned to its Faslane base on Monday after 204 days ...

The Soviet Oscar class nuclear submarine is colossal at 155 meters in length, and it has a displacement of over 16,000 tons, increasing to over 20,000 when submerged. It can last 120 days ...