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Ships and boats

Ships and submarines A-Z

Aircraft carrier   A large military ship with a main deck that serves as a runway from which aircraft take off and land. Aircraft are kept in hangars below deck. 

Ballast tank   A compartment low in a ship’s hull that can be filled with water, or emptied. A ship may fill its ballast tank to make it sit lower in the water and so stabilize it. In a submarine, ballast tanks are filled with water to make it dive or emptied to make it surface.

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