ship designed to carry liquid cargo in bulk. Its cargo is usually a petroleum product, either crude oil being carried from oil fields to refineries or gasoline being carried from refineries to distribution centres. The liquid is piped into the cargo space of the ship and transported without the use of barrels or other containers. Special tankers carry other liquids such as molasses, asphalt, wine, or liquefied natural gas. Tankers differ from general cargo ships in that they normally carry a full load in one direction and return without cargo
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