submarines

Submarines are watercraft capable of underwater operation, primarily used by navies for military purposes, research, and exploration. They can navigate beneath the surface, making them stealthy and difficult to detect. Submarines are designed with a hull that withstands water pressure and are equipped with technology for navigation, communication, and warfare. They typically use a system of ballast tanks to dive and surface, adjusting their buoyancy. Some submarines are nuclear-powered, allowing them to operate for long durations without needing to resurface. Their capabilities include surveillance, reconnaissance, and launching missiles or torpedoes.