System and method for compensation of motions of a floating vessel

A system for keeping a substantially level working platform (4) in a desired position, said working platform (4) being arranged movable to a floating vessel (1) or floating structure (1a), with a lifting system comprising a set of elongate lifting actuators (8) connected pivotal to a base structure (5) and connected to the working platform (4) via numerous pivotal joints to compensate for pitch, roll and heave movements imposed by the floating vessel or structure (1, 1a), comprising

• (a) one or more sensors (18, 19, 20) for recording pitch, roll and heave movements;
• and
• (b) a working frame (6) having
• (i) first and second vertical beams (6b) with a horizontal beam (6a) extending between the first and second vertical beam (6b),
• (ii) two linear motion units (7) arranged slideably to the respective vertical beams (6b),
• (iii) a first upper end fixed to the working platform (4) and a second lower end connected movable to the base structure (5) by a balance system comprising set of balance actuators (9) and a pivotal joint (12), wherein
• said actuators (9) and pivotal joint (12) are arranged to tilt the working frame (6) in a desired angle to compensate for movements imposed by the floating vessel or structure (1, 1a) and maintain the working platform (4) in a desired position, and
• the working frame (6) is positioned on a second end (E2) of the platform (4) with an opposite first end (E1) of the platform (4) free from equipment and configured to be accessed for utilization of the platform.