The SSBN Typhoon-class submarine, officially designated the Akula (“Shark”), 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. The Typhoon was the largest submarine ever built. I actually saw the Akula Submarine when I was in archangelsk because almost my whole family works/worked with submarine. The Sub is absolutely huge, like a building. You will definitely be shocked by the size of the sub if you see it IRL. It would have been a bit better to give the surface-displacement of the Typhoon-Class (up to 24,500t) before comparing it to the Charles de Gaulle (42,500t at full load) to give a better sense of scale. The submerged displacement is higher because the entire ship is displacing the water around it instead of just down to a ship's waterline.