The flight deck of an aircraft carrier is the surface from which its aircraft take off and land, essentially a miniature airfield at sea. On smaller naval ships which do not have aviation as a primary mission, the landing area for helicopters and other VTOL aircraft is also referred to as the flight deck. The official U.S. Navy term for these vessels is "air-capable ships".
Flight deck of Charles de Gaulle, catapults are installed on aircraft carriers in three countries.
Eugene Ely's first landing, on the armored cruiser USS Pennsylvania
HMS Argus showing the full-length flight deck from bow to stern
ROKS Dokdo's full length flight deck
An aircraft carrier is a warship that serves as a seagoing airbase, equipped with a full-length flight deck and facilities for carrying, arming, deploying, and recovering aircraft. Typically, it is the capital ship of a fleet, as it allows a naval force to project air power worldwide without depending on local bases for staging aircraft operations. Carriers have evolved since their inception in the early twentieth century from wooden vessels used to deploy balloons to nuclear-powered warships that carry numerous fighters, strike aircraft, helicopters, and other types of aircraft. While heavier aircraft such as fixed-wing gunships and bombers have been launched from aircraft carriers, these aircraft have not landed on a carrier. By its diplomatic and tactical power, its mobility, its autonomy and the variety of its means, the aircraft carrier is often the centerpiece of modern combat fleets. Tactically or even strategically, it replaced the battleship in the role of flagship of a fleet. One of its great advantages is that, by sailing in international waters, it does not interfere with any territorial sovereignty and thus obviates the need for overflight authorizations from third-party countries, reduces the times and transit distances of aircraft and therefore significantly increases the time of availability on the combat zone.
Four modern aircraft carriers of various types—USS John C. Stennis, Charles de Gaulle (French Navy), USS John F. Kennedy, helicopter carrier HMS Ocean—and escort vessels, 2002
Comparison of aircraft carriers
French aircraft carrier Charles de Gaulle (rear), and US Navy carrier USS Ronald Reagan conducting joint operations in the Persian Gulf; both with the CATOBAR configuration.
USS Abraham Lincoln (CVN-72) a United States Navy fleet carrier, also often referred to as a supercarrier, seen here underway in 2019 crossing the Atlantic.