Abstract: A method of stabilizing a floating body comprises applying to the body a vertical force so as to maintain the body in an equilibrium position which is spaced vertically from the normal floating position of the body, in which the vertical force comprises a limited vertical force applying means acting on the body in one vertical direction and a flexible tension member applying tension to the body or the force applying means in the opposite vertical direction, the tension member having a tension less than the said limited vertical force.

Abstract: A method of assembly of an offshore tower comprises engaging a column with a sleeve of a support structure by positioning the column so that its longitudinal axis is vertical or nearly vertical, positioning the support structure so that the column-receiving sleeve is uppermost and the axis of the sleeve is vertical or nearly vertical, with the sleeve above the top of the column, and positioning the column in the sleeve by relative longitudinal movement between the column and support structure.

Abstract: A vessel (10) is provided for installing or removing a module (16) on or from a support structure (30) erected in a body of water. The vessel is able to suspend the module over the support structure by cranes (14, 15), enabling installation or removal of the module to be accomplished while the module is being suspended.

Abstract: A mooring system comprising a buoy, which is anchored by anchor chains. The buoy has a horizontal pivot shaft for connection with the device to be moored and this shaft is positioned at a part of the buoy, which is rotatable about a vertical shaft relative to the part to which the chains are secured. The buoy comprises at least two spaced buoyant members which are interconnected by a bridge member in which a turntable is journalled. The bridge member furthermore comprises the horizontal pivot shaft.

Abstract: The invention relates to a mooring system, comprising a tanker (1,9,15,22,72,86,104,131) and a device (5,11,20,61,74,95,111,135) having some type of anchor (3,10,23,66,71,68,77,113,140), the tanker being rotatably connected with that device for rotation about a vertical axis (4,117). A conduit (6,24,25,45,46,122-125) extends upwardly towards that device (5,11,20,61,74,95,111,135) and towards a swivel (38,58,79,102,121) concentric with that axis (4,117) and from the swivel towards the tanker, the system having a quick connect coupling (83,84,85,91,92,97,116,117,118). The device (5, etc.) preferably has controllable buoyancy and can be of any type including a normal mooring buoy.

Abstract: The invention relates to a mooring system, comprising a tanker (1,9,15,22,72,86,104,131) and a device (5,11,20,61,74,95,111,135) having some type of anchor (3,10,23,66,71,68,77,113,140), the tanker being rotatably connected with that device for rotation about a vertical axis (4,117). A conduit (6,24,25,45,46,122-125) extends upwardly towards that device (5,11,20,61,74,95,111,135) and towards a swivel (38,58,79,102,121) concentric with that axis (4,117) and from the swivel towards the tanker, the system having a quick connect coupling (83,84,85,91,92,97,116,117,118). The device (5, etc.) preferably has controllable buoyancy and can be of any type including a normal mooring buoy.