A light crusier will get 2.5 units while a WWI battle ship might get 4.5 and a WWII battleship 6 to 8 units. The units can be used for a mixture of guns and pumps. A gun with 50 rounds is worth 1 unit. A gun with 75 rounds is worth 1.5 units. The speed of the ships is limited by the orignal length of the ship.
Shorter ships can turn faster but have a lower speed.
Longer ships can move faster but can't turn as quickly. A combat warship is controled by a radio control system carried in a waterproof box. The pump and motors are driven by a battery. The gun system is powered by a small CO2 cylinder with a pressure regulator and small valves operated by the radio. Eighty five percent of the side of the hull is coated with very thin balsa wood.