They're far from the fastest vessels in the world's oceans -- five ... (51.4 mph), breaking the world submarine speed record. As impressive as that was, the boat didn't last longer than two ...

San Francisco Bay is turning into a race course for some of the fastest boats on the planet. The Oracle San Francisco Sail ...

But there's plenty that is known about a sub's speed while underwater ... that also powered the boat's two 825-hp electric propulsion motors. Some of the world's fastest diesel-electric ...