Naval forces refer to the military units that operate at sea, primarily using ships, submarines, and aircraft. Their main roles include protecting a nation's maritime interests, conducting naval warfare, and providing humanitarian assistance during crises. These forces are essential for maintaining security in international waters and ensuring safe passage for trade. Naval forces are typically organized into fleets, which may include various types of vessels such as aircraft carriers, destroyers, and frigates. They also work closely with other branches of the military, such as the Air Force and Army, to conduct joint operations and enhance overall defense capabilities.