Dry cargo ship

A bulk carrier, bulk freighter, or bulker is a merchant ship specially designed to transport unpackaged bulk cargo, such as grains, coal, ore, and cement in its cargo holds. ... Today's bulkers are specially designed to maximize capacity, safety, efficiency, and to be able to withstand the rigours of their work. ... bulkers make up 15% - 17% of the world's merchant fleets and range in size from single-hold mini-bulkers to mammoth ore ships able to carry 400,000 metric tons of deadweight (DWT). [Bulk carrier. Wikipedia]