A naval submarine is a watercraft capable of underwater operation, primarily used by military forces. These vessels are designed to navigate beneath the surface of the ocean, allowing them to conduct various missions, including surveillance, reconnaissance, and combat. Submarines can be powered by nuclear or diesel engines, enabling them to remain submerged for extended periods. Submarines are equipped with advanced technology, including sonar systems for detecting other vessels and underwater obstacles. They can carry a range of weapons, such as torpedoes and missiles, making them a crucial component of modern naval warfare. Their stealth capabilities allow them to operate undetected, enhancing their strategic value.