Nuclear Submarines Nuclear-Powered Submarines Virginia-class Submarines Russian Navy Nuclear-capable Submarines Gender Integration German Navy U.S. Navy Ballistic Missile Submarines Ohio-class Submarines Construction Royal Navy U-Boats Russian Military Scorpene-class Defense Contracts Kalvari-class Destroyers Scorpène-class Dreadnought-class Nuclear-Powered Ballistic Missile Submarines USS Kentucky Tactical Nuclear Attack Submarines Nuclear Attack Submarines Converted Submarines Modified Submarines Drone Warfare Strategic Nuclear Submarines Diesel-Electric Submarines U.S. Nuclear Attack Submarines Russian Submarines Submarine-launched Cruise Missiles Trident Missile System Vanguard-class Submarines Indigenous Defense Submarine (IDS) Vanguard Class Nuclear-Powered Submarine Type 218SG World War II Submarines Invincible-class US Submarines Warships Missiles Arihant-Class USS New Jersey Victoria-class Submarines Singapore Navy Procurement Invincible-class Submarines