SSBN (nuclear-powered ballistic missile submarine)

An SSBN, or nuclear-powered ballistic missile submarine, is a type of military submarine that uses nuclear energy for propulsion, allowing it to stay underwater for long periods. It is equipped with ballistic missiles capable of delivering nuclear warheads, serving as a strategic deterrent by maintaining the capability to respond to threats. These submarines are designed for stealth and survivability, often staying hidden beneath the ocean surface to prevent detection. Their primary role is to provide a secure, second-strike capability in nuclear deterrence, ensuring national security without engaging in active combat.