Officials said the drone was not armed, but the police report listed "potential national security implications" as one ...

Take the sub out of the cup and remove some sticky ... and the buoyancy of the straw submarine. When in the water, the straw submarine displaces an amount of water equal to its own submerged ...

The three-tonne DIY submarine called Lake Defender ... “The hatch was open - and came within inches of water flooding in. “I had to jump out and use my body weight to keep it upright.” ...

The U.S. Navy has long eyed a return to a cavernous former Royal Norwegian Navy base that could serve as a convenient support ...

and is capable of blowing an enemy submarine clean out of the water. Guided by either copper wire or inbuilt sonar, the Spearfish delivers 660 lbs of explosive charge either when it impacts with ...

The detection of submarines becomes easier during snorkeling periods, when it raises it head out of the water for air intake ...

it can take out mines with ease. The Echo Range is a serious looking drone sub developed by Boeing for the US Navy. Eventually Boeing hopes that it will be able to stay under water for 70 days at ...

A search is under way for the ARA San Juan A submarine with 44 crew on board remains missing after disappearing off the Argentine coast on 15 November. In the last reported contact with the ARA ...

During our recent tour of the USS John Warner nuclear-powered submarine ... Once the chamber is filled with water, matching the pressure inside and out, "there's an internal locking mechanism ...