Helicopter carrier

It has a large flight deck that occupies a substantial part of the deck, which can extend the full length of the ship like HMS Ocean[1] of the Royal Navy (RN), or extend only partway, usually aft, as in the Soviet Navy's Moskva class[2] or in the Chinese Navy's Type 0891A.

It often also has a hangar deck for the storage and maintenance of rotorwing aircraft.

Pure helicopter carriers are difficult to define in the 21st century.

The advent of STOVL aircraft such as the Harrier jump jet, and now the F-35, have complicated the classification; the United States Navy's Wasp class, for instance, carries six to eight Harriers as well as over 20 helicopters.

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