An offshore platform lifting device for lifting operations at sea after sailed to a certain position of a sea surface includes an upper deck, a plurality of upright columns, a rail seat, a base disposed on the rail seat, two davit arms, two first winches, and two second winches. The upper deck has a lower pontoon. The upright columns are connected between to the upper deck and the lower pontoon. Each upright column is provided with a support leg that is longitudinally inserted through the upright column, thereby positioning the offshore platform lifting device on the seabed through the upright columns. The two davit arms are disposed the base and drives the base to move laterally through a pushing device. The two second winches each have a second cable passing through the two davit arms. A hook is disposed at a distal end of the second cable.

The invention relates to a trim stabilizer device comprising a foil being structurally independent from the transom of a boat to which it is to be mounted and being tiltable around its transversal axis; a first actuator associated with the foil for tilting thereof; a adjusting arm associated with the foil, at one end, for making a vertical motion thereof relative to the transom, and at the other end, associated with a connecting member provided on the transom. The trim stabilizer device for boats comprises a second actuator for making a vertical motion by a non-manual force of the adjusting arm.

A fin stabilizer for stabilizing watercraft includes a pivotable stabilizer fin and a receiving space for receiving the stabilizer fin. The stabilizer fin is shiftable from a retracted state in which the stabilizer fin is received in the receiving space to an extended state in which the stabilizer fin extends from the receiving space. Also at least one flexible cover element for at least partially covering an opening of the receiving space, through which opening the stabilizer fin enters and exits the receiving space during retracting and extending, respectively. The stabilizer fin does not contact the at least one cover element when shifting from the retracted state to the extended state.

A semi-submersible support platform and a positioning method thereof are disclosed. The semi-submersible support platform, used for operations at sea after sailed to a certain position of a sea surface, includes an upper deck and a lower pontoon. The upper deck and the lower pontoon are connected by a plurality of upright columns. Each upright column is provided with a support leg that is longitudinally inserted through the upright column. The lower pontoon has a plurality of chambers for receiving water therein. The support leg has a compartment for receiving water therein. Each upright column includes a leveling mechanism therein. When the support leg sinks to reach the seabed, the leveling mechanism in each upright column is combined with the support leg to support the support leg. The leveling mechanism can drive the upper deck to move up or down along the support leg.

A semi-submersible support platform and a positioning method thereof are disclosed. The semi-submersible support platform, used for operations at sea after sailed to a certain position of a sea surface, includes an upper deck and a lower pontoon. The upper deck and the lower pontoon are connected by a plurality of upright columns. Each upright column is provided with a support leg that is longitudinally inserted through the upright column. The lower pontoon has a plurality of chambers for receiving water therein. The support leg has a compartment for receiving water therein. Each upright column includes a leveling mechanism therein. When the support leg sinks to reach the seabed, the leveling mechanism in each upright column is combined with the support leg to support the support leg. The leveling mechanism can drive the upper deck to move up or down along the support leg.

A ship (1) includes a hull (2) having side shells (3A, 3B) formed at both sides in athwart ship direction, a pair of watertight compartments (6A, 6B) installed along the side shells (3A, 3B) of both sides in the athwart ship direction in the hull (2) and portions of which are divided and formed by the side shells (3A, 3B), a connection section (7) configured to bring the pair of watertight compartments (6A, 6B) in connection with each other, an opening/closing valve (8) installed at the connection section (7), and a control device (9) configured to control the opening and closing of the opening/closing valve (8), wherein the control device (9) switches the opening/closing valve (8) in an open state into a closed state when a predetermined condition is satisfied after receiving a signal indicating damage to the side shell (3A) has occurred.

A ship (1) includes a hull (2) having side shells (3A, 3B) formed at both sides in athwart ship direction, a pair of watertight compartments (6A, 6B) installed along the side shells (3A, 3B) of both sides in the athwart ship direction in the hull (2) and portions of which are divided and formed by the side shells (3A, 3B), a connection section (7) configured to bring the pair of watertight compartments (6A, 6B) in connection with each other, an opening/closing valve (8) installed at the connection section (7), and a control device (9) configured to control the opening and closing of the opening/closing valve (8), wherein the control device (9) switches the opening/closing valve (8) in an open state into a closed state when a predetermined condition is satisfied after receiving a signal indicating damage to the side shell (3A) has occurred.

Disclosed, as a device for correcting the horizontality of the small ship according to the present invention, is a device for controlling the horizontality of a small ship by using a variable mast, the device comprising: a tilt sensing unit for sensing the tilt of the small ship; a position adjustment unit formed such that at least a portion thereof can move in the horizontal direction on the deck of the small ship, and having a separate mast loaded on an upper part thereof to support the mast such that the mast is located at a predetermined height or higher; and a horizontality control unit for correcting the center of gravity of the small ship by adjusting a position of the mast through the position adjustment unit in correspondence to the tilt sensed by the tilt sensing unit.

An anchoring system for floating platform which eliminates the pitch and roll movements of the floating platform using anchoring lines (200) attached to the seabed (5), which are supported by several pulleys or rotary fixing means (2, 3) of the floating platform (100) and are all joined in a common counterweight (1) hanging from the floating platform (100). Each anchoring line (200) comprises a direct subline (200d) and a cross subline (200c), which maintain the counterweight (1) always located in correspondence with the central axis (300) of the floating platform (100). It also describes a novel method for installing the floating platform at its destination without the aid of special ships.

A sail boat propulsion and stabilisation system. The system uses a device to substantially increase the performance of sail or motor boats by reducing the displacement to increase speed and comfort during sailing, due to its light weight and dynamics. The system comprises a control panel connected to a hydraulic group which actuates the device. The device is provided with a keel wing and a counterbalance or lift wing joined by a bulb, a cylindrical actuator for the counterbalance and lift wing, a hydraulic rotary actuator for hoisting the assembly, an articulation shaft, and a tilting shaft for the assembly which is coupled to the broadside or to the mounting base beside sensors of the angle of attack of the counterbalance wing. The hydraulic group and the cylindrical hydraulic actuator are optionally replaced by a cylindrical electric actuator connected to the control panel and acting upon the counterbalance wing.