A nuclear-powered attack submarine is a type of military vessel designed for stealthy underwater operations. It uses nuclear reactors for propulsion, allowing it to operate for long periods without needing to surface for fuel. This capability enables the submarine to remain submerged for extended missions, making it difficult to detect. These submarines are equipped with advanced technology and weaponry, including torpedoes and cruise missiles. They play a crucial role in naval warfare, intelligence gathering, and surveillance. Notable examples include the U.S. Navy's Virginia-class and Los Angeles-class submarines, which are among the most advanced in the world.