Abstract: This invention consists of a device for washing/cleaning of cargo holds onboard dry cargo vessels, where the device (50) is arranged at the extreme front end of a suitable trolley (40), which is in turn secured on the edge of the vessels cargo hold hatch (41) in such a way that the device may be lowered down between the cargo hold hatches (41), (42) whereupon the rotating portion of the washing device (1) rotates whilst pressurized water (16) exits from a nozzle (22) which is arranged at the end of the washing arm (20) concurrently with the washing arm (20) being gradually lowered so that the entire cargo hold is washed/cleaned from the top and down. After completion of the washing process the rotating portion of the device (1) may be raised so that the entire device can be repositioned to the next cargo hold, after being disengaged from the hatch cover.

Abstract: According to the invention, the device for utilising ocean-wave energy functions through appropriate pontoons (1) and an intermediate floating central unit (2) located just beyond them. These are interconnected by appropriate arms (3) using suitable hinges (4) and have suitable cylindrical, hydraulic power jacks (7) which alternately pump a liquid (10) under high static pressure to a turbine (11), preferably a constant pressure (Pelton) turbine. This converts the potential energy in the liquid into, for example, electric power when the arms are raised by the pontoons and the central unit sinks into the wave troughs, whereupon the pistons (12) on the opposite side of the power jacks again suck in the continually circulating, energy-bearing liquid as the arms sink when the pontoons enter the troughs and the central unit rises on the wave crests.