To provide a ship capable of flexibly dealing with such a route as an Arctic Ocean course, and having a small risk of damage such as a contact bottom.

A rotatable jet flow propeller 4 and a fixed type jet flow propeller 3 constituted as a part of a hull construction are provided on the bottom of the ship, and a reverse injection nozzle 27 is detachably provided on the fixed type jet flow propeller. In each of both propellers, a nozzle 5 in the shape of a hanging bell is provided, and a shell type cone is arranged on the center line of its inside water stream. An inlet of a suction pipe of a pump is provided on the bottom of the ship. Furthermore, a lateral axis swirl mixed flow pump is used as a pump, and a nozzle 26 for high speed in which a discharging flow cross section is gradually reduced is detachably provided to the fixed type jet flow propeller. Pressure water can be jetted to the cone and/or nozzle provided in the fixed type jet flow propeller. A platform extended to the rear of an end bulkhead outer plate and equipped with deck houses 37 on its both sides is provided. A ring having an airfoil cross section is provided inside the nozzle in the shape of a hanging bell, and the pressure water can be jetted into the nozzle.