Soviet submarines were a crucial part of the Soviet Navy during the Cold War, designed for various missions including surveillance, reconnaissance, and nuclear deterrence. They were known for their advanced technology, including quiet propulsion systems and sophisticated sonar capabilities, which allowed them to operate stealthily in the world's oceans. The most famous class of Soviet submarines is the Typhoon-class, which was the largest submarine ever built. These submarines were equipped with intercontinental ballistic missiles, making them a key component of the Soviet Union's nuclear strategy. Their design emphasized both size and firepower, reflecting the military priorities of the era.