Abstract: A system (19; 19, 35) for reducing an amount of a counterweight for a crane comprises a crane (2) having a founding structure (3) being disposed on a base (20), a coupling unit (4), and a superstructure (5) being coupled to the founding structure (3) via the coupling unit (4). The system (19; 19, 35) further comprises a suspension device (21; 21, 36) for suspending the crane (2) at the base (20), said suspension device (21; 21, 36) having a guiding structure (22; 22, 37) defining a guiding direction (23; 23, 38), said guiding structure (22; 22, 37) being attached to the base (20), a displacement device (24) being displaceably attached to the guiding structure (22; 22, 37) along the guiding direction (23; 23, 38), and at least one suspension element (29) being connected with a first end to the crane (2) and being connected with a second end to the displacement device (24).

Abstract: A vessel, preferably a chip, for transport and mounting of structures has a hull and at least four vertically elevated support legs and displacement apparatus for elevating the support legs so as to stabilize the ship for lifting heavy loads from the ship for mounting for example to a preinstalled base on the seabed.