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Aircraft carriers are warships that act as airbases for carrier-based aircraft. In the United States Navy, these consist of ships commissioned with hull classification symbols CV (aircraft carrier), CVA (attack aircraft carrier), CVB (large aircraft carrier), CVL (light aircraft carrier), CVN (aircraft carrier (nuclear propulsion)) and CVAN (attack aircraft carrier (nuclear propulsion)). Ships commissioned with hull classification symbols CVA-58 or higher are additionally classified as supercarriers. The United States Navy has also used escort aircraft carriers and airship aircraft carriers. This list does not include various amphibious warfare ships which can operate as carriers. The first aircraft carrier commissioned into the United States Navy was the USS ''Langley'' (CV-1) on 20 March 1922. The ''Langley'' was a converted ''Proteus''-class collier (originally commissioned as the USS ''Jupiter'' (AC-3), ''Langley'' was soon followed by the ''Lexington-''class, the ''Ranger-''class (the first purpose-built carriers in the American fleet), the ''Yorktown-''class, and the ''Wasp''-class.〔 These classes made up the entirety of the United States carrier fleet active prior to and during the Second World War. With World War II looming, two more classes of carriers were commissioned under President Franklin Roosevelt, the ''Essex''-class and the ''Independence''-class. Between these two classes, 35 ships were created. During this time, the Navy also purchased two training vessels, the USS ''Wolverine'' and the USS ''Sable''. The Cold War led to multiple developments in the United States' carrier fleet, starting with the addition of the ''Midway''-class and the ''Saipan-''class. One more class in the start of the Cold War, the ''United States''-class, was canceled due to the Revolt of the Admirals. Later in the Cold War era, the first of the classes dubbed "supercarriers" was born in the ''Forrestal''-class, with the ''Kitty Hawk'', ''Enterprise'', and ''John F. Kennedy'' classes. Ordered later in this era, the ''Nimitz-''class carriers are the only class that are currently in active-duty service. A new class of carriers, the ''Ford''-class, has been ordered by the Navy. As of now, one ship (the PCU ''Gerald R. Ford'') has been completed, construction has started on one ship (the USS ''John F. Kennedy''), and one ship has been planned (the PCU ''Enterprise'').〔 ==List== ;Keys * * * * 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「List of aircraft carriers of the United States Navy」の詳細全文を読む スポンサード リンク
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