Naval units refer to organized groups of ships and personnel that operate under a navy's command. These units can include various types of vessels, such as aircraft carriers, destroyers, submarines, and support ships, each serving specific roles in maritime operations. They are essential for national defense, power projection, and humanitarian missions. Each naval unit is typically structured to perform particular tasks, such as surveillance, combat, or logistics. For example, an aircraft carrier serves as a floating airbase, while a submarine can conduct stealthy reconnaissance. Together, these units enhance a nation's naval capabilities and readiness.