Launch is drive at least by one mechanic engine. Motor boats are quite small water vehicles and are most often used in a recreational and sporting way but for warfare as well. In order to drive launch in Poland a proper patent Is needed such as Motor Steerer, Motorboat Steersman, Motorboat Captain. Polish rule stands that moor boats not exceeding 10 kW does not require a patent to use it. Motorboats also include motor boating yachts.