The invention relates to an adjustable device, pivotally arranged about a pivot axis by means of a rotating electric motor having a rotor and a stator via a reduction gearing for reducing the rotation of the motor to an adjustment movement of the adjustable device, wherein the reduction gearing is a planetary gearing, the axis of the electric motor is coaxial with the axis of the reduction gearing and with the pivot axis of the adjustable device and the reduction gearing and the electric motor to form a compact construction.

A method for controlling a marine vessel having first and second steering nozzles and first and second trim deflectors comprises generating at least a first set of actuator control signals and a second set of actuator control signals. The first set of actuator control signals is coupled to and controls the first and second steering nozzles, and the second set of actuator control signals is coupled to and controls the first and second trim deflectors. The acts of generating and coupling the first set of actuator control signals and the second set of actuator control signals result in inducing any of a net yawing force, a net rolling force, and a net trimming force to the iu marine vessel without inducing any other substantial forces to the marine vessel by controlling the first and second steering nozzles and the first and second trim deflectors. Also disclosed is a system for controlling a marine vessel.

A method and a system for controlling a marine vessel having first and second trim deflectors is disclosed. The first and second trim deflectors have a first surface having a first area and a second surface having a second area, wherein the second planar surface is coupled to the first surface. The method and system control the first and second trim deflectors to induce any of a net yawing force, a net rolling force, and a net trimming force to the marine vessel without inducing any other substantial forces to the marine vessel by controlling the first and second trim deflectors.

A fluid hinge includes a first part of a two-part element including a planar surface of a trim tab and a second part of the two-part system having at least one bracket secured to the hull of a watercraft and the first and second parts of the two-part element are not physically coupled together. It also provides at least one bracket secured to the hull on which the planar surface of the trim tab may rest and the at least one bracket not taking any load from the planar surface except at rest to keep the planar surface from descending below the horizon of the hull.

A recreational sport boat includes a hull, having starboard and port sides and a transom, and a wake-modifying devices positioned aft of the transom. The wake-modifying device includes a plate-like member and at least one downturned surface. The wake-modifying device is pivotable between a non-deployed position and a deployed position about a pivot axis. When a wake-modifying device is in the deployed position, the downturned surface is lower than it is in the non-deployed position so as to be able to modify the boat's wake.

A steering system on a marine vessel includes at least one outboard drive configured to propel the marine vessel, a steering actuator configured to rotate the at least one outboard drive, at least one trim device coupled to the marine vessel and movable with respect to a hull of the marine vessel to adjust a running angle thereof, and at least one trim actuator. A control system configured to determine a desired roll angle and at least one of a desired turn rate and desired turn angle for the marine vessel based on a steering instruction and control the steering actuator to rotate the at least one outboard drive based on the desired turn rate and/or the desired turn angle and control the at least one trim actuator to move the at least one trim device based on the desired roll angle to effectuate the steering instruction.

A vessel oscillation damper system has one or more pairs of fin assemblies placed in the transom of the vessel symmetrically in relation to the transverse axis passing through the middle of the transom of the vessel, in which the fin assembly has multiple successive individual fins arranged in the vertical direction, each of which has a type Il cross-section, having one base and two intersecting sides, where the sides of the upper fin are tangential to the sides of the immediately lower fin, forming successive closed ducts through which water passes and the fin assemblies rotate clockwise above the water level and counterclockwise by their articulated connection to the vessel simultaneously or independently from each other and at the same time opposite and parallel, resulting in immediate damping of pitching and rolling simultaneously or individually and preventing the capsizing of the vessel and inflow of water.

An amphibious vehicle includes a vehicle body; a flap supported at a lower portion in a traveling direction of the vehicle body to be able to swing in a direction in which an upper edge portion approaches and separates from the vehicle body; a support column which has a fluid actuator capable of expanding and contracting in accordance with a pressure of a working fluid to a cylinder chamber, is connected to the flap in at least a first end portion in a longitudinal direction, and performs adjustment of a swinging angle of the flap by expansion and contraction of the fluid actuator; a power source which supplies the working fluid to the cylinder chamber; and a safety valve which communicates with the cylinder chamber, and opens when an internal pressure of the cylinder chamber becomes greater than a predetermined pressure to be able to discharge the working fluid in the cylinder chamber.

A system for automatically modifying the lean of a catamaran during a turn includes a pair of fins, each substantially permanently affixed to the inside edge of the left and right hull, plus a pair of vertically displacing plates that extend, one at a time, from the left or right hull, into the body of water. Individually, the fins or plates modify the lean of a catamaran during a turn such that the tilt is neutral or inboard, versus outboard without either. The cumulative effect of using both is substantial and synergistic.

A method of operating a boat to produce a surf wake includes partially filling a transverse ballast tank, moving the boat through a body of water, rolling the boat toward either its port or starboard side to shift the water in the transverse ballast tank such that at least some of the water in the transverse ballast tank moves from one side of a longitudinal centerline of the boat to the other side of the centerline, and creating a surf wake on the side toward which the boat is rolled.