Sweden's armed forces said Wednesday they were following a Russian submarine that entered the Baltic Sea a day earlier, amid mounting tensions in the region. "A Russian submarine entered the Baltic ...

An Israeli firm has unveiled an autonomous underwater vehicle that can play a crucial role during sea combat. Called the BlueWhale System, the latest military innovation is engineered for stealth and ...

Nuclear reactors are amazing pieces of technology. They're clean sources of energy, generate tons of power around the world, and keep American aircraft carriers and submarines at sea. U.S. subs' ...