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A dredger is a waterborne vessel equipped with a device or devices for scraping or sucking the seabed. A dredger is designed to remove material, such as sand and gravel, from the bed of the sea or other body of water. In American usage any floating vessel equipped with dredging equipment is called a dredge. The most common types of dredgers are trailing suction hopper dredgers and cutter suction dredgers.