A barge is a flat-bottomed ship that carries freight and cargo down rivers and canals, and there are a number of jobs on a barge, depending on the size of the vessel. Similar to a barge, a tugboat is flat-bottomed and used to tow other ships. Like any other ship, a barge needs a captain, whose responsibilities are to ensure that the daily operation of the barge goes smoothly, the itinerary is set, and all cargo is stowed properly. Sometimes, a captain also performs the duties of a pilot, while in other cases there is a separate job for a pilot. Other jobs on a barge include mates, engineers, deckhands, oilers, and chefs.