The supply of the necessary dilution water to the barge is done with one or two water nozzles. In case of one nozzle the suction mouth is usually equipped with jets, while the movability of the main nozzle is than so large that it can also spray behind the suction mouth. To present sand well to the suction mouth it is necessary to have moveable water nozzles. This is done using hydraulic cylinders. For the dredging process the pressure side of the jet pump is, except for the water nozzles, also connected with suction side of the dredge pump.