A barge is a flat-bottomed, usually rectangular boat designed for hauling cargo along inland waterways. Barges are usually simple affairs, some are no more than glorified rafts, although they can be up to 200 feet long. The larger ones usually sport an enclosed space, like a little building on one end of the ship with cots, a table, and chairs inside. Smaller barges in relatively shallow water are usually poled along by rowers.