OFF-SHORE INSTALLATION VESSEL, METHOD OF OPERATING AN OFF-SHORE INSTALLATION VESSEL

摘要

An off-shore installation vessel (1) comprises a single hull (2), a ballast system (3), and an installation device (6). The single hull has a transit displacement at a transit draft and a maximum displacement at a maximum draft. The single hull comprises a bottom (18), a bilge (20), and a side (22). The side comprises an oblique side part (24) and a vertical side part (26). The vertical side part is at a greater distance from a centreline plane (CL) than the bilge. The oblique side part extends from the bilge to the vertical side part. The ballast system comprises ballast water tanks (32) with a capacity that is at least equal to the difference between the maximum displacement and the transit displacement for changing the draft of the off-shore installation vessel from the transit draft to the maximum draft. The transit waterline(10) intersects the oblique side part.