Supercarrier

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Image:USS Stennis HMS Illustrious.jpg Image:USS Enterprise FS Charles de Gaulle.jpg

Supercarrier is a word sometimes used to describe a form of aircraft carrier. It is generally considered to be 75,000 tons or greater in displacement — most countries operate carriers with a displacement of less than 40,000 tons (such as Charles de Gaulle), and more often closer to 20,100 (such as HMS Invincible). Supercarrier is not an official designation.

The 81,000 ton USS Forrestal was the first operational supercarrier, though United States would have been in service earlier, had it been completed; its cancellation triggered the "Revolt of the Admirals." United States would have had a nuclear strategic bombing role, rather than the multipurpose role that all subsequent supercarriers have had, carrying tactical fighters only for defense. The 72,000 ton armored Japanese carrier Shinano of the World War II era was almost heavy enough to be considered a supercarrier, but lacked several defining features, such as catapults, arrestor wires, and angled flight decks, and also did not possess the sheer size of modern supercarriers. Because of the angled deck and large deck area, supercarriers can have a far larger island than conventional carriers, greatly improving both their aviation capabilities and their capability as flagships.

The U.S. Navy is now the only major sea power building large aircraft carriers, of which the 100,000-ton Nimitz class is the most prolific. All completed supercarriers are American, although the Soviet Union did begin construction of Ulyanovsk, an 85,000-ton nuclear carrier comparable in size to earlier American supercarriers. Ulyanovsk was 40% complete when cancelled, along with a follow-on vessel, due to lack of funding after the end of the Cold War in 1991.

While not supercarriers as defined above, the two Royal Navy CVF vessels will provide the United Kingdom with capabilites closer to United States Navy carriers than their current Invincible class vessels. Giving evidence to the House of Commons Defence Committee, the First Sea Lord Admiral Sir Alan West explained that interoperability with the United States Navy was as much a deciding factor of the size of the carriers as the firepower of the carrier's airwing:

"I have talked with the CNO (Chief of Naval Operations) in America. He is very keen for us to get these because he sees us slotting in with his carrier groups. He really wants us to have these, but he wants us to have the same sort of clout as one of their carriers.."

Supercarrier classes

• United States (USA, 1950s) - Single-unit laid down, cancelled along with four others
• Forrestal class (USA, 1955) - Four unit class, all decommissioned
• Kitty Hawk class (USA, 1961) - Three unit class, two decommissioned, one active
• Enterprise (USA, 1961) - Single-unit class, still active
• John F. Kennedy (USA, 1968) - Single-unit class, a modified Kitty Hawk design, still active
• Nimitz class (USA, 1975) - Final unit (of ten) scheduled for completion in 2009, all units still active
• Ulyanovsk (USSR, 1990s) - Two units cancelled after partial completion
• CVN-21 (USA, 2013) - Two units pending, construction of more units likely over coming decadespt:Super-porta-aviões