A posture control system for a hull offers a more comfortable ride to crew on a marine vessel. A posture control tab is mounted on a stern of the hull and controls the posture of the hull. An actuator actuates the posture control tab. At least one propeller generates a propulsive force for the hull. An engine turns the propeller. A controller controls the actuator according to at least one of engine torque generated by the engine and propeller torque generated by the propeller.

A control system for a marine vessel that has a propulsion device including an engine. The control system has an opening angle adjustment device configured to adjust a throttle opening angle of the engine, and a controller including a computing device and a non-transitory storage medium containing program instructions. The execution of the program instructions by the computing device causes the controller to judge whether or not a hull of the marine vessel has entered a planing state, set a predetermined mode in which the planing state is maintained, and upon determining that the predetermined mode is set and that the hull has entered the planing state, control the opening angle adjustment device to keep the hull in the planing state even when the hull has decelerated.

A trim tab control system for a ship includes a trim tab and a controller. The trim tab is able to swing on a ship body. The controller is configured or programmed to swing the trim tab at a first swing speed when the trim tab is not at a time of landing based on operation state data indicating the operation state of the ship. The controller is configured or programmed to swing the trim tab at a second swing speed less than the first swing speed when the trim tab is at the time of landing based on the operation state data.

A support system for outboard marine motors at the transom of a boat includes a support device having a first part that is integral with the transom and a second part that is integral with the outboard motor. The second part is translatable with respect to the first part, so that the second part moves according to an orientation in the distancing or approaching direction of the water line of the boat. A control unit is configured to set the position of the second part with respect to the first part and to generate control signals, so as to move the second part in the direction of immersion of the propeller of the outboard motor.

A system and method of configuration including a trim tab having a planar surface, and guiding tabs coupled to the trim tab. The guiding tabs extend outward. A pair of mounting brackets, with a mounting plate, a vertical leg, and a safety catch tab are included. The mounting brackets are configurable for variable mounting. The vertical leg of the mounting bracket includes an upper portion bottom portion, the vertical leg bottom portion is vertical, and the upper portion is configurable to be angulated relative to a transom. The upper portion and mounting bracket have an angle between, which may be adjusted relative to a curvature in the transom. The guiding tabs configured to engage with the vertical legs of the mounting bracket, wherein the trim tabs are located forward of the vertical legs of the mounting brackets.

An adjustable surf wake system can enhance a wake formed by a watercraft travelling through water. A rider control device can enable a rider to control the wake of the watercraft while riding the wake, such as for wake surfing. The rider can adjust the speed of the watercraft, can adjust the height of the wake, and/or can change the watercraft between a surf-left configuration and a surf-right configuration. The rider control device can include a position sensor. A drone can position a camera based on the position sensor of the rider control device for filming the rider.

An actuator includes a drive body including a torque-transfer surface configured to receive a torque. The actuator further includes: a drivable body including an output shaft such that rotation of the drive body causes movement of the output shaft; a first bearing configured to transfer thrust forces from the output shaft in a first direction; and a second bearing configured to transfer thrust forces from the output shaft in a second direction. At least the first bearing extends in a radial dimension beyond the torque-transfer surface.

An actuator comprises a housing and a drive tube assembly disposed within the housing. The drive tube assembly includes a drive tube provided with internal threads, a piston nut provided with external threads which threadedly engage the inner threads of the drive tube, and an output shaft connected to the piston nut. A motor rotates the drive tube to cause the piston nut to reciprocate along a length of the drive tube and the output shaft to reciprocate relative to the housing. There are bearings which transmit axial loads from the drive tube to the housing and transmit radial loads from the drive tube to the housing.

A system and method of configuration including a trim tab having a planar surface, and guiding tabs coupled to the trim tab. The guiding tabs extend outward. A pair of mounting brackets, with a mounting plate, a vertical leg, and a safety catch tab are included. The mounting brackets are configurable for variable mounting. The vertical leg of the mounting bracket includes an upper portion bottom portion, the vertical leg bottom portion is vertical, and the upper portion is configurable to be angulated relative to a transom. The upper portion and mounting bracket have an angle between, which may be adjusted relative to a curvature in the transom. The guiding tabs configured to engage with the vertical legs of the mounting bracket, wherein the trim tabs are located forward of the vertical legs of the mounting brackets.

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.