A water-jet dingy allows quick sailing and excursions without the usual problems caused by a turbine of a common outboard motor. On board, there are also 3 complete diving equipments including a compressor for the refilling of the gas-bottles as well as an electro-scooter for pleasure diving or for support against strong currents; furthermore a swimming battery-run compressor system for diving as far down as 12 meters without gas-bottles. At the stern 2 tow-rods are mounted for sportive fishing for fresh fish for the meals.