Abstract: A vessel or boat includes a hull having a stern at which there is a stern swim platform having at least one moving part capable of moving along and close to a portion of the stern, the moving part being capable of adopting at least a first working position in which it is out of the water on which the boat floats and a second working position in which the moving part is lowered with respect to the hull into the water, steps being provided at the stern. At least part of the steps is of one piece with the moving part of the stern swim platform and moves therewith over fixed steps provided within the stern, the movement of the steps taking place in a guided way, the moving steps forming an elongatable swim ladder with the fixed steps.

Abstract: A vessel or boat includes a hull having a stern at which there is a stern swim platform having at least one moving part capable of moving along and close to a portion of the stern, the moving part being capable of adopting at least a first working position in which it is out of the water on which the boat floats and a second working position in which the moving part is lowered with respect to the hull into the water, steps being provided at the stern. At least part of the steps is of one piece with the moving part of the stern swim platform and moves therewith over fixed steps provided within the stern, the movement of the steps taking place in a guided way, the moving steps forming an elongatable swim ladder with the fixed steps.

Abstract: A hybrid type vertical shaft turbine (1) for wind power generating devices, includes a supporting structure (2) supporting, concentrically and axially spaced, an internal rotor (3) made of Savonius blades (4) and an external rotor (5) made of Darrieus blades (6), wherein the shaft (7) has the bottom end (12) which may be connected to an electric generator for transforming wind energy into electric energy, wherein both the internal Savonius rotor (3) and the external Darrieus rotor (5) have twisted blades with identical or different values in the axial direction of the turbine. The Savonius blades extend between end flanges (8, 9) to radial arms (10, 11) equispaced in each flange (8, 9) and offset between the flanges (8, 9) to accommodate the external Darrieus blades. The proposed twistings allow considerably improving the continuity of the driving torque generated with the wind velocity increasing towards medium-low, medium and medium-high velocities and vice versa.