The Typhoon-class submarine could stay submerged for 120 days in uneventful conditions. However, that amount could be further increased if necessary – especially in the potential outbreak of a nuclear war.The type was conceived at the peak of the Cold War, at a time when submarines had a clear objective: to convey nuclear missiles.By the 1970s, the Soviet Navy resolved to undertake a massive program known as Project 941 Akula. The idea was to create an underwater craft capable of carrying as many nuclear weapons as possible. As such, at 175 meters long, the Typhoon became the largest nuclear submarine to ever roam the seas…