Typhoon Class Submarine | The Largest Submarine Ever Built

The SSBN Typhoon-class submarine, officially designated the Akula (“Shark”) in Russia, is a Cold War behemoth measuring 175 meters long and displacing 48,000 tonnes as it sinks.

That's double the tonnage of American Ohio-class SSBNs it was meant to compete with.

No less than five internal pressure hulls made of ultra-expensive titanium gave the Typhoon outstanding resistance to battle damage.