The trolling motor for an overboard person comprises a trolling motor and a wrist worn device. The trolling motor may be a battery-operated propulsion device that is operable to propel and steer a water craft. The wrist worn device may be worn by a person on the water craft. A control unit within the trolling motor may communicate wirelessly with the wrist worn device and may be cognizant of a relative position of the wrist worn device with respect to the water craft. If the person falls overboard, a separation distance between the wrist worn device and the control unit may increase. Upon a determination that the separation distance has exceeded a predetermined distance threshold, the control unit may direct the trolling motor to energize, deenergize, or reverse direction such that the trolling motor may move the water craft closer to the person.

A power system for electrical power generation and distribution in a marine vessel is provided. The system includes a first direct current (DC) bus configured for powering a first load (in form of a first electrical propulsion machine), and a second DC bus configured for powering a second load (in form of a second electrical propulsion machine). The system further includes a generator which includes at least a first winding set and a second winding set. The first winding set is connected to power the first DC bus and the second winding set is connected to power the second DC bus. A marine vessel including such a power system is also provided.

At least a portion of a setting pattern of functions relating to a boat is automatically changed in response to execution of activation operations different from one another. The boat includes a controller configured or programmed to activate the boat by each of a plurality of different activation operations. When an activation operation of the activation operations satisfying a first condition is executed, the controller sets functions relating to the boat with the first setting pattern. When an activation operation not satisfying the first condition is executed, the controller sets functions relating to the boat with a second setting pattern having setting contents at least partially different from the first setting pattern.

A propulsion device for a marine vessel includes an engine and a forward/reverse shifting mechanism. The direction of a propulsive force generated by the propulsion device is changed according to a shift position of the forward/reverse shifting mechanism. The shift position is changeable between a forward position and a reverse position via a neutral position. In response to a command signal based on an operation of a joystick or an operator, the shift position of the forward/reverse shifting mechanism and the engine are controlled. When the shift position of the forward/reverse shifting mechanism is changed from the neutral position to a position corresponding to a direction opposite to a travelling direction of the marine vessel, which is determined based on the speed of the marine vessel, a correction control is performed to increase an output of the engine based on the speed of the marine vessel.

A control system for a marine propulsion device includes a propeller driven by either an engine or a motor. The control system includes a first memory to store first information to identify whether the control system has shut down normally or abnormally even during a reset period of the control system, a second memory to store second information indicating control states of the engine and the motor even during the reset period of the control system, and a controller configured or programmed to start controlling the engine and the motor, based on the second information stored in the second memory, when the first information stored in the first memory indicates an abnormal shutdown of the control system at a startup of the control system.

The present invention relates to a gearbox system for mounting on a waterborne vessel with a hydrofoil, the gearbox system comprising:

a housing having an interior surface defining an interior space of defined dimension;
a gearing system comprising a propeller shaft engagement portion, the gearing system located within the interior of the housing; and
an engine located within the interior space of the housing and in mechanical communication with the gear box;
wherein the housing is water-tight and wherein the gearing system and engine are in thermal contact with the interior surface of the housing.

Further provided is a hydrofoil system including such a gearbox system and a waterborne vessel including such a hydrofoil system.

A system for alleviating variations in torsional loads applied to a shaft coupled to a main engine of a marine vessel, said shaft is coupled to a propeller of the marine vessel, the system comprising an electric motor-generator configured to provide power to the shaft or take out power from the shaft; a controller coupled to the electric motor-generator said controller is configured to execute instructions, comprising: measuring a group of values that are indicative of torsional loads applied on a shaft of the marine vessel over time; creating a time-based series of values that represent a predictive time-based torsional loads on the marine vessel; collecting readings indicative of power provided by a main engine of the marine vessel; computing an intervention time series of power values to be outputted by the electric motor-generator; wherein the electrical power outputs the intervention time series values of power to the shaft.

A method for maintaining a marine vessel propelled by a marine propulsion device in a selected position includes determining a current global position of the marine vessel and receiving a signal command to maintain the current global position. The current global position is stored as a target global position in response to receiving the signal command. A subsequent global position of the marine vessel is determined and a position error difference between the subsequent global position and the target global position is determined. The method includes determining marine vessel movements required to minimize the position error difference, and causing the marine propulsion device to produce a thrust having a magnitude, a direction, and an angle calculated to result in achievement of the required marine vessel movements. At least one of timing and frequency of discontinuity of thrust production is controlled while the position error difference is minimized.

The present invention regards a watercraft vehicle (1) having a propeller shaft (9) coupled to a motor (3) and a propeller (7) forming a propeller disc (11) having a hub (17). A first blade (8) of the propeller (7) is hingedly coupled to a first oblique lag-pitch hinge (22′) of the hub (17) and a second blade (10) of the propeller (7) is hingedly coupled to a second oblique lag-pitch hinge (22″) of the hub (17). The first oblique lag-pitch hinge (22′) being oriented in a direction oblique to the axis of rotation (RX) and parallel with the second oblique lag-pitch hinge (22″). A control circuitry (5) provides a first thrust (T′) in a first arc segment (13′) of the propeller disc (11) and provides a second thrust (T″) in a second arc segment (13″) of the propeller disc (11) by controlling a rate of change of shaft (9) rotational velocity, wherein a first propeller blade pitch change is achieved about the first oblique lag-pitch hinge (22′) and a second propeller blade pitch change is achieved about the second oblique lag-pitch hinge (22″). The present invention also regards a method of manoeuvring the watercraft vehicle (1).

Some embodiments relate to a control system for a marine vessel having a first propulsion system and a second propulsion system, the control system comprising: a processor configured to: receive a steering command and a thrust command; and control at least the first propulsion system and the second propulsion system based on the steering command and the thrust command.