8. Typhoon Class

Soviet-built Typhoons are the largest submarines in the world, weighing in at 48,000 tons (a U.S. Ohio-class ballistic missile sub weighs less than 20,000 tons, while an Arleigh Burke-class destroyer is only about 9,000 tons). Despite its size, the six Typhoons that were built were surprisingly quiet and hard to detect. They carried 20 SS-N-20 (NATO code name "Sturgeon") ballistic missiles equipped with multiple nuclear warheads, as well as anti-ship guided missiles and torpedoes. The boats featured multiple pressure hulls for greater strength.