Barge

The standard barge was the workhorse ship of trade. They transported grain, silk, and other bulky goods up and down stream. Propelled by square sails and broad sweeps. Way of the Minor Clans, p. 20 Barges were very large, slow-moving, and typically heavily laden. They were the supply ships of entire fleets, and the largest were staffed by a crew of one hundred. Masters of War Web Supplement, p. 12 Typically, a merchant would live aboard his vessel, docking it to sell his goods. They were used primarily in rivers and lakes. Book of Water, p. 115