The United States Navy is a branch of the United States Armed Forces. It is responsible for conducting naval operations. "The mission of the Navy is to maintain, train and equip combat-ready naval forces capable of winning wars, deterring aggression and maintaining freedom of the seas." During the 21st century, United States Navy sustains an extensive attendance in the world, such as: East Asia, Southern Europe, and the Middle East.
In the Navy, it falls under the administration of the Department of the Navy, under civilian leadership of the Secretary of the Navy. The senior naval officer is the Chief of Naval Operations. The Secretary of the Navy and Chief of Naval Operations are responsible for organizing, recruiting, training, and equipping the Navy so that it is ready for operation under the command of the Unified Combatant Commander.
Commissioned ships of the U.S. Navy are called ‘United States Ship’ (USS), but the non-commissioned, civilian-manned vessels of the U.S. Navy that is identified as ‘United States Naval Ship’ (USNS). All of these names are officially selected by the Secretary of the Navy and are usually those of U.S. states, cities, towns, important people, famous battles, fish, or ideals.
U.S. Navy is prepared to use the nuclear reactors aboard the naval vessels. This nuclear energy powers most U.S. aircraft carriers and submarines. In the case of a “Nimitz-class carrier”, two naval reactors give the ship almost unlimited range and provide enough electrical energy to power a city of 100,000 people.
