Dual boom structure, dual boom crane and vessel with the crane

The present invention, the potential along the first boom movement in the horizontal direction first trolley and associated with a point of said first trolley at a point of the second boom and the second boom being supported is connected to the first trolley It is connected via a support joint with, and the auxiliary supports can be controlled is connected with the other point of the first trolley length at different points of the second boom, the second boom and cables to support so as to be pivotable to the second boom It provides a dual structure including a boom elevating possible spreader. According to one with dual boom structure according to the invention crane, wherein the Hi ices of the center support and adjust the length of the auxiliary support and the first boom by a length adjustment of the cable by the support joint of the second boom rolling or of pitching can be in response to one or more exercise to control the horizontal position or the position of the spreader. Move the harbor, the mobile harbor crane spreader, attitude control