The Inventive Subject Matter is a System for harvesting wind energy and natural wave energy. The harvesting can be performed on a body of water. The body of water can be an ocean or lake. The harvesting can be performed autonomously and create portable energy for ships or other purposes.

The method is for operating a traction device (3) of a floating vessel (1) that includes a kite (4) having a wing (5) provided with a leading edge (6), a flying line, at least one front line equipped with a clutch, and rear lines, the method includes making the wing (5) gain altitude, holding it only by the flying line, the front and rear lines remaining slack; subsequently, once an altitude has been reached, locking the at least one front line, by activating the clutch, enabling the at least one front line to be mechanically connected to the floating vessel (1); and releasing the flying line and keeping it slack.

A floating offshore structure of the present disclosure includes: a plurality of columns; and a plurality of pontoons installed at lower ends of the columns, respectively, wherein a polygonal shape is formed by an imaginary line connecting the columns, the pontoons are installed inside the polygonal shape, a cross-sectional area in a direction parallel to sea level of the pontoons is greater than or equal to the cross-sectional area in the direction parallel to the sea level of the columns, and the pontoons may have a shape protruding outward at the lower ends of the columns.

A floating offshore structure of the present disclosure includes: a plurality of columns; and a plurality of pontoons installed at lower ends of the columns, respectively, wherein a polygonal shape is formed by an imaginary line connecting the columns, the pontoons are installed inside the polygonal shape, a cross-sectional area in a direction parallel to sea level of the pontoons is greater than or equal to the cross-sectional area in the direction parallel to the sea level of the columns, and the pontoons may have a shape protruding outward at the lower ends of the columns.

The present invention concerns a method for determining the production availability of an offshore wind farm comprising at least one floating wind turbine, the method comprising: obtaining wind farm data, obtaining strategy data relative to operation and maintenance resources to carry out an action on the floating wind turbine(s), obtaining meteorological data relative to an offshore environment for the offshore wind farm over a given period of time, determining motion parameters as a function of the wind farm data and of the meteorological data, and determining the production availability of the offshore wind farm in the offshore environment over the given period of time on the basis of the wind farm data, of the strategy data, of the meteorological data, and of the determined motion parameters.