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The names of commissioned ships of the United States Navy all start with USS, for "United States Ship". Non-commissioned, civilian-manned vessels of the U.S. Navy have names that begin with USNS, standing for "United States Naval Ship". A letter-based hull classification symbol is used to designate a vessel's type. The names of ships are selected by the Secretary of the Navy. The names are those of states, cities, towns, important persons, important locations, famous battles, fish, and ideals. Usually, different types of ships have names originated from different types of sources. Modern aircraft carriers and submarines use nuclear reactors for power. See United States naval reactors for information on classification schemes and the history of nuclear-powered vessels. Modern cruisers, destroyers and frigates are called surface combatants and act mainly as escorts for aircraft carriers, amphibious assault ships, auxiliaries and civilian craft, but the largest ones have gained a land attack role through the use of cruise missiles and a population defense role through missile defense. See List of ships of the United States Navy for a more complete listing of ships past and present. ==Aircraft carriers== The ability to put most nations within striking distance of U.S. air power makes aircraft carriers the cornerstone of US forward deployment and deterrence strategy.〔("Why the carriers?" ). Official United States Navy website. Retrieved 7 March 2007.〕 Multiple carriers are deployed around the world to provide military presence, respond quickly to crises, and participate in joint exercises with allied forces;〔("Fact file - Aircraft Carriers" ). United States Navy. Retrieved 7 March 2007.〕 this has led the Navy to refer to their ''Nimitz''-class carriers as "4.5 acres of sovereign and mobile American territory".〔("World Wide Aircraft Carriers" ). globalSecurity.org. Retrieved 12 November 2006.〕 Former President Bill Clinton summed up the importance of the aircraft carrier by stating that "when word of crisis breaks out in Washington, it's no accident the first question that comes to everyone's lips is: where is the nearest carrier?"〔(The US Navy Aircraft Carriers ). Official U.S. Navy Website. Retrieved 20 August 2006.〕 The power and operational flexibility of a carrier lie in the aircraft of its carrier air wing. Made up of both fixed-wing and rotary-wing aircraft, a carrier air wing is able to perform over 150 strike missions at once, hitting over 700 targets a day.〔("Carrier Design" ). GlobalSecurity.org. Retrieved 8 April 2006.〕 Carrier air wings also protect friendly forces, conduct electronic warfare, assist in special operations, and carry out search and rescue missions. The carriers themselves, in addition to enabling airborne operations, serve as command platforms for large battle groups or multinational task forces. U.S. Navy aircraft carriers can also host aircraft from other nations' navies; the French Navy's Rafale has operated, during naval exercises, from U.S. Navy flight decks.〔(French Sailors Experience Flight Operations Aboard Roosevelt, US Navy Press Release, 22 July 2008 ), navy.mil〕 Following below is a list of all carriers (and their homeports) on active duty or under construction . For a list of all carriers see List of aircraft carriers of the United States Navy and List of escort aircraft carriers of the United States Navy. (10 ships) * – Everett, Washington * – Norfolk, Virginia * – San Diego, California * – Norfolk, Virginia * – Everett, Washington * –Yokosuka, Japan * – Bremerton, Washington * – Norfolk, Virginia * – Naval Air Station North Island in San Diego, California * – Norfolk, Virginia ''Gerald R. Ford class'' (up to 10 planned in total)〔Combat fleet of the world 2012〕 * – under construction; will replace USS ''Enterprise'' * – under construction; may replace USS ''Nimitz'' * – planned; may replace USS ''Dwight D. Eisenhower'' 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「United States Navy ships」の詳細全文を読む スポンサード リンク
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