An attack submarine is a type of military submarine designed primarily for offensive operations. These vessels are equipped to engage enemy ships and submarines, gather intelligence, and conduct surveillance. They can be powered by nuclear or diesel-electric engines, allowing them to operate underwater for extended periods. Attack submarines are armed with torpedoes and, in some cases, cruise missiles. They play a crucial role in naval warfare, providing stealth and versatility. Notable examples include the Los Angeles-class and Virginia-class submarines of the United States Navy, which are known for their advanced technology and capabilities.