This general-purpose boat type can be seen in many of the world's harbours. These small launches can be fitted out for a wide variety of tasks, and are commonly used to transport persons or materials; they can also be used as tugs for larger vessels if fitted with special towing gear, or even as fire-fighting launches. The electric power system for our model of the Dolly has been carefully selected to suit the vessel, and the single-screw system provides an excellent scale performance. The hull features an integral screw tunnel, giving very good manoeuvrability. The recommended battery gives running times of up to an hour.