The Seawolf-class submarine threat is widely believed to keep the Chinese and Russians up at night. It is not only the fastest submarine in the world today, it is also the best submarine ever built.

Built and designed over 50 years ago, the Soviet K-222 submarine still holds the record for the world's fastest submarine ever built, reaching speeds of 82.8 kilometers (51.4 miles) per hour or 44 ...

The design has the lithium batteries and thrusters at the rear so the pilot and passengers can enjoy the view. U-Boat Worx ...