( With a long keel, shallow draft, and aggressive wedge shape, this river cutter slides through the water silently and swiftly. Sixty feet long, it has two mainmasts, fitted with broad fore-and-aft, triangular sails. More canvas is suspended between the bowsprit and forward mast. The cutter sits low in the water, minimizing its profile. The sails can be taken down for further stealth, and the ship can instead be propelled with oars or poles from the two sunken aisles on either side of the masts. Narrow catwalks run the length of the ship between the masts and the polemens' pits, allowing access to the rigging drawn taut about the sails. Fore and aft of the pits, the ship's hull curves upward as it wraps around two cabins: the captain's cabin just behind the bow, and the crew's quarters in