A boat stabilizer having an upper harness for attachment to a vessel, the upper harness having an assembly control system for controlling attached wing assemblies, each wing assembly having a wing attached to the assembly control system and a wing mount attached to the wing and the assembly control system. The boat stabilizer may be further comprised of a controllable parasail comprising a parasail canopy, a plurality of parasail cords attached the parasail canopy, a parasail mount attached to the upper harness and the parasail cords, a parasail control rudder attached to each parasail cords, and yaw and pitch controllers, both of which are attached to the parasail control rudder. The assembly control system is configured to work in conjunction with the controllable parasail to provide the desired balance of vertical lift and forward propulsion to the attached vessel, while also providing directional control to the attached vessel.

Embodiments described herein relate generally to a sailing vessel that can substantially obviate the heeling problem experienced by classical sailboats. During navigation, the sailing vessel is driven forward by an aerodynamic force exerted by wind on the sail, and balanced by a hydrodynamic force exerted by water on a float on the stern of the sailing vessel, the aerodynamic force and the hydrodynamic force being parallel or substantially parallel to a longitudinal axis of the sailing vessel.

A sailing boat has an auxiliary hydrodynamic surface carried by a main boom connected in an oscillating way to a deck of the boat, about an axis of articulation parallel to the longitudinal direction of the boat. A drive system lowers the main boom on one side or the other of the boat in such a way that the hydrodynamic surface is selectively lowerable in a first operative position on one side of the boat to be put into the water on one side of the boat or in a second operative position on the other side of the boat to be put into the water on the other side of the boat. The boom is sized so that, when the hydrodynamic surface is located in one of its two operative positions on one side or the other of the boat, it is set at a lateral distance from the boat.

A boat stabilizer having an upper harness for attachment to a vessel having bow, stern, port and starboard sides; the upper harness having: four beams forming a rectangular shape with four corners, each beam running along a different side of the vessel, a rudder and an assembly control system and four wing assemblies, each one attached to the assembly control system and the upper harness and having a rod junction connected to the upper harness, two rods connected to the rod junction, a wing connected to the two rods, and a wing mount attached to the wing by a wing pole and the upper harness by a control pole. The assembly control system may adjust wing pitch angle and rotate the wing assemblies to and from the water. Adjustment of wing angles may increase stability, reduce wear and tear, increase fuel efficiency, and maintain vessel safety.

Various embodiments of a sailing vessel are disclosed configured to reduce a heeling moment acting on the sailing vessel as a wind acts on a sail of the sailing vessel. Generally, a mast of the sailing vessel is allowed to cant to leeward, thus reducing the heeling moment.

A movable structure comprises a spar having a central portion, a first end portion, and a second end portion. A first tow line may connect between the first end portion of the spar and a first resistance device. A second tow line may connect between the second end portion of the spar and a second resistance device. A first shock absorber may connect between the spar and a first side of a movable structure. A second shock absorber may connect between the spar and a second side of a movable structure.

Embodiments described herein relate generally to a sailing vessel that can substantially obviate the heeling problem experienced by classical sailboats. During navigation, the sailing vessel is driven forward by an aerodynamic force exerted by wind on the sail, and balanced by a hydrodynamic force exerted by water on a float on the stern of the sailing vessel, the aerodynamic force and the hydrodynamic force being parallel or substantially parallel to a longitudinal axis of the sailing vessel.

Embodiments described herein relate generally to a sailing vessel that can substantially obviate the heeling problem experienced by classical sailboats. During navigation, the sailing vessel is driven forward by an aerodynamic force exerted by wind on the sail, and balanced by a hydrodynamic force exerted by water on a float on the stern of the sailing vessel, the aerodynamic force and the hydrodynamic force being parallel or substantially parallel to a longitudinal axis of the sailing vessel.

A system for improving the static and dynamic stability of an offshore floating structure in which outriggers having a unit with an inertial mass are supported from the structure to hold each unit at a radial distance from a centre of rotation of the offshore floating structure and be entirely submerged. Water may enter and exit a tank in a unit to statically adjust and dynamically control stability and dampen roll and pitch of the structure. The outriggers can be raised for tow. The outriggers ballast can be adjusted during tow, installation and in operation. The units can transport mooring lines. An embodiment of a hydrocarbon production or support facility is described with the dynamic flexible risers connected to a support structure of the system.

Embodiments described herein relate generally to a sailing vessel that can substantially obviate the heeling problem experienced by classical sailboats. During navigation, the sailing vessel is driven forward by an aerodynamic force exerted by wind on the sail, and balanced by a hydrodynamic force exerted by water on a float on the stern of the sailing vessel, the aerodynamic force and the hydrodynamic force being parallel or substantially parallel to a longitudinal axis of the sailing vessel.