Seen around the 18th Century, Prams were shallow draught, flat bottomed boats used for troop transport. Popular during The Napoleonic Wars, they featured 1 to 2 Masts and normally were outfitted with 10 to 20 guns. Because of their flat bottom they were idea for shallow Coastal duties. Several examples of Prams were even equipped with Oars (for human propulsion). They ran around 75 to 100 feet long and displaced about 125 tons.