Abstract: In an electric outboard motor to be driven by an electric motor, the electric motor is formed in a watertight manner and is disposed to be exposed to the outside. Further, the electric motor is an air cooled type, and a shape of the electric motor is in a substantially flat shape in which a dimension in a horizontal direction perpendicular to an output shaft of the electric motor is made larger than a dimension in a height direction. The electric motor, when a hull is seen in plan view, is disposed in a manner that a front portion of the electric motor overlaps a transom board of the hull at the rear.

Abstract: An electric outboard motor main body including an electric motor and a propulsion section that applies the electric motor as motive power, and a power supply section supplying power to the electric motor and a control section controlling the electric motor that are disposed inside a hull separately from the electric outboard motor main body are provided, and the electric motor and the propulsion section are attached to enable a tilt-up operation via a tilt pin provided in a horizontal direction, and the electric motor is disposed higher than the tilt pin in a state before the tilt-up operation.

Abstract: A multi-functional modular device comprises: a shaft; electric motor(s); battery(s); thrust producing fan(s); and blade(s) being removably attachable to the shaft for levering of a paddlesports boat. With the blade(s) attached to the shaft and the motor(s) off, the device is usable for manual levering, and with the motor(s) on, the fan blade thrust may selectively assist in levering to propel the paddlesports boat. Fan thrust may be usable in a direction opposite to a propulsive direction of levering to reduce work required per stroke, which reduces power per stroke, or may alternatively be usable in the same direction as propulsive levering to increase total propulsive power per stroke, which requires greater strength/work output by the rower/paddler. Various sized blades may be interchangeable therein to adjust the work output. Removing the blade(s) permits the fan to be statically submerged and clocked to propel the boat in a desired direction.

Abstract: A personal dive device includes a body having a power source that is disposed in the body with a voltage of the power source being greater than or equal to about 37 volts. A controller is in electrical communication with the power source. A rotary device is in selective electrical communication with the controller and a propeller assembly is engaged with the rotary device. A method for controlling the speed of a personal dive device includes providing a personal dive device having a power source disposed within a body and an electronic controller. A signal from a trigger mechanism is received. An effective power output from the power source is varied based on the signal from the trigger mechanism. The effective power output from the power source is provided to a rotary device that is in selective electrical communication with the electronic controller.

Abstract: Practical electric-powered propulsion systems, associated operator-control systems, and modification methods enable conventional surfboards (and similar small watercraft) to be converted for water-jet propulsion. Wireless controls are integrated with wearable marine accessories such as modified neoprene or fabric gloves, armbands, wristbands, hand straps, or gauntlets. Safely immersible, wet-swappable high-power battery packs facilitate extended use of electric propulsion in surf. Compact integrated electronic control units incorporate motor controllers, wireless receivers, and control logic. On-board power, propulsion, and control components are positioned and installed to avoid disrupting the shape of the watercraft body so as to minimize added hydrodynamic drag and perceived differences from a traditional unpowered version of the watercraft in appearance, balance, or performance.

Abstract: An improvement to a conventional surfboard includes an impeller and an electric motor contained primarily within the body of the surfboard, whereby performance of the surfboard is substantially unaffected by the presence of the impeller and the electric motor. The electric motor is operatively connected to the impeller for providing a forward thrust of the surfboard. The improvement to the conventional surfboard also includes a throttle for selective control of the electric motor for operating the impeller to provide a forward thrust of the surfboard, the throttle being configured for use by a surfer lying in a prone position on the smooth top surface of the body of the surfboard. An extent of the surfer's energy that otherwise would be expended during paddling can be preserved for riding waves by using the impeller to provide the forward thrust during paddling.

Abstract: An underwater vehicle comprising an electrical power generation system that converts thermal energy from a body of water into electrical energy is disclosed. The vehicle comprises the electrical power generation system and a thermal mass whose temperature is based on the temperature of water at a first depth of a body of water. The vehicle is moved to a second depth of the body of water, wherein water at the second depth is a different temperature that the water at the first depth. The electrical power generation system generates electrical energy based on the difference between the temperature of the water at the second depth and the temperature of the thermal mass. The electrical power generation system is able to generate electrical energy when the temperature difference is negative as well as when the temperature difference is positive.

Abstract: A system and a method for providing power to a marine vessel and, more particularly to a tugboat is disclosed. The system includes diesel engines and generators and batteries which can be charged using power supplied by the generators, shore power or regenerated power. The tugboat is operated utilizing battery power only and the generators are used to provide additional power if needed or to recharge the batteries.

Abstract: A method and apparatus for controlling the temperature of batteries in a hybrid marine vessel utilize a compartment to store the batteries and various conduits to conduct air to and from that compartment. A heat exchanger can draw air from the compartment and cool the air for use in the cabin of the marine vessel. The air from the cabin can be directed into the compartment to provide a flow of air that carries heat away from the batteries in the compartment and toward the heat exchanger.

Abstract: A ship propulsion system for watercraft contains at least one propeller, by which a drive force can be created for the watercraft. The ship propulsion further contains an electric motor, the rotor of which is directly mechanically coupled to the at least one propeller via a shaft such that the at least one propeller may be brought into a respective rotating movement by a rotation of the rotor. In order to cool the rotor of the electric motor a thermosiphon is disposed in the shaft, and the propeller serves as a heat sink for a working medium of the thermosiphon.

Abstract: A tension sleeve system that is selectively operable to engage a trolling motor system of a watercraft. The tension sleeve system is configured to fit over the area containing the lower portion of the trolling motor's stationary shaft and the middle portion (i.e., the exposed portion) of the swivel shaft, especially in proximity to the middle bearing area between the two shafts. The tension sleeve system is selectively operable to adjust feedback on any cable operated rotational steering system by applying an appropriate amount of tension between the trolling motor's stationary shaft and the swivel shaft, thus controlling the torque and/or energy generated by the propulsion motor and propeller. Clamps or other suitable devices can be used to apply the appropriate amount of tension between the trolling motor's stationary shaft and the swivel shaft by appropriately tightening the tension sleeve members against the external surfaces of the two shafts.

Abstract: A swash plate mechanism (200) consists of a drive element (210) that can be rotated about a main axis (250), a transmission element (220) that can be rotated about a swash plate axis (260), the swash plate axis intersecting the main axis at a swash plate angle (a) and rotating about the main axis together with the drive element, a power take-off element (230) and a supporting element (240). A first coupling means is arranged between the transmission element (220) and the power take-off element (230) and a second coupling means is arranged between the transmission element and the supporting element, with at least one of the two coupling means being a pair of teeth, and with the teeth (271, 272, 273, 274) of the pairs of teeth serving as coupling means being designed as spur toothing.

Abstract: An electric motor-driven water craft including a fuselage, on which a user can at least partially lie or stand. The fuselage has a flow channel with a screw that is driven by an electric motor and contains the electric motor and batteries, in addition to a control device for the electric motor and the screw, and those items are housed at least partially in the flow channel. This invention provides a higher power for motor-driven water craft of this type by locating the batteries in a water-tight housing. At least some sections of the batteries are in thermally conductive contact with the housing. The housing can be at least partially of a thermally conductive material and/or the electric motor is an internal-rotor motor. The stator is in thermal conductive contact with a housing of the electric motor by a heat conducting unit.

Abstract: Power-generating system based on successive hydroelectric turbines (?1N) located parallel to the submerged section of the hull of vessels and/or submarines (generating line ?1N), at the point or points of greatest channeling of the water flow produced naturally during navigation. Each turbine is preceded by a propeller (?1N), whose function is to increase the speed of the water flow powering the turbine when the vessel and/or submarine is in motion, and to generate the power flow when the vessel and/or submarine is stationary (anchored or moored).

Abstract: A surfboard has a surfboard body, an electric motor, and a propeller. An electric power circuit provides power to the electric motor from a source of electro-motive force within the interior of the surfboard body. Additional electrical components, which may be capacitor banks, limit the rate of acceleration of the surfboard body. Several different capacitor banks may be included to provide selectable rates of acceleration.

Abstract: Improvements to electrically powered watercraft including kayaks are disclosed. The watercraft comprises a hull defining a cavity and a battery powered retractable propulsion unit. The retractable propulsion unit can be retracted into the cavity with powered or unpowered means. Various retractable propulsion units are disclosed, including propulsion units that are steerable wherein the thrust can be selectively directed. Specific embodiments to improve the steerability of electrically powered watercraft are disclosed. Mechanisms for disengaging the steering controls from the retractable propulsion units are also disclosed. Locking mechanisms for locking the retractable propulsion unit in an extended or fully retracted position are also disclosed.

Abstract: A differential displacement electromagnetic device providing motion over a support frame. Permanent electromagnets are fixedly mounted to a carriage and angularly oriented relative to the support frame lengthwise axis. Upright anchor columns project transversely from the support frame, and are interconnected by tension springs. A movable block is slidingly carried over both rails including a pair of opposite side spring loaded arms, carrying floating electromagnets. A bracket mount carries two spaced pivotal axles, and pivotally mounted rocker arms carrying corresponding permanent magnet. The rocker arms are sized in such a way as to be pivotably movable between a first limit position, where the permanent magnets abut against the angularly oriented electromagnets, and a second limit position, where the permanent magnets abut against the floating electromagnets.

Abstract: A folding boat (11) with at least two foldable horizontal frames (12) each comprising at least two fold ably connected sections secured to each other by releasable locking means (24) and equipped with at least one foldable guard rail (26). Said frames (12) are connected by a plurality of removable horizontal transverse beams (34) supporting deck sheets (44) and are secured to the frames (12) by releasable locking means (38), said frames (12) hold a plurality of removable and stackable floats and said deck sheets (44). Said floats can be three types of configurations: for individual installation, paired mirror oriented installation or combination of the intermediate and the end floats forming a continuous hull. Said floats are equipped with removable and stackable gasketted watertight covers (48) and with a removable stiffening elements (80) installed inside.

Abstract: This invention concerns a general principle for ship hulls known as “Autonomous Dynamic Sailing Hull”, built in whole or in part to contain, in the depth of its structure inside with compartments that are separated and sized for this purpose, in the space delimited by a double hull or within a portion of hull or adapted to the internal spaces of the ship, in a globally controlled system, one or two different types of gas and for some seawater compartments to be able to, on the one hand, produce by electrolysis, through one or more integrated fuel cell modules known as PEMFC, energy resources (electricity) required for the operation of propulsion and its equipment according to expected usage, on the other hand, modulating its mass and thus its navigation through ingestion or ejection of seawater.

Abstract: Improvements to electrically powered watercraft including kayaks are disclosed. The watercraft comprises a hull defining a cavity and a battery powered retractable propulsion unit. The retractable propulsion unit can be retracted into the cavity with powered or unpowered means. Various retractable propulsion units are disclosed, including propulsion units that are steerable wherein the thrust can be selectively directed. Specific embodiments to improve the steerability of electrically powered watercraft are disclosed. Mechanisms for disengaging the steering controls from the retractable propulsion units are also disclosed. Locking mechanisms for locking the retractable propulsion unit in an extended or fully retracted position are also disclosed.

Abstract: A steering system for craft turns a motor from a fixed position to a secondary position. As a result, the craft turns right or left as desired by a user of the craft. A control unit instructs the steering system to turn the craft to a desired orientation. A steering motor is activated that turns a cam attached to a shaft. The shaft is attached to the motor. The cam also includes an indent and sensors to indicate when the motor is in the fixed position or a secondary position that corresponds to a maximum angle for turning the motor. The steering system returns the motor back to the fixed position when the user indicates the steering system is to stop turning, or when the secondary position is reached. The steering system returns the motor back to the fixed position without knowledge of the user. Thus, the motor stays in one of three positions unless instructed by the control unit to turn.

Abstract: A motor mount assembly is provided for detachably attaching a motor to a watercraft. The motor mount assembly comprises a battery housing, a mounting flange, an adjustable support assembly, and a motor support shaft. The battery housing is disposed on and releasably secured to the watercraft. The battery housing accommodates a battery that powers the motor. The mounting flange is detachably attached to and extends outwardly from the battery housing. A first end of the adjustable support assembly detachably attaches to the mounting flange. The adjustable support assembly supports the motor support shaft. The motor support shaft is connected to a second end of the adjustable support assembly and is positioned substantially vertical to the adjustable support assembly. The motor is connected to the bottom end of the motor support shaft and is therefore detachably attached to the watercraft via the motor support shaft.

Abstract: Clean energy powered surfboard having various advantages that make for easy to learn, easy to use, safer, exciting, high performance, environmentally friendly surfing on any ocean wave in the world. The various embodiments include novel motor, turbine, or electric motor generator surfboards comprising hydrogen or electric-powered motors, which can be switch-activated and which drive jet pumps. Energy can be stored as compressed gas, including air and hydrogen. Energy can be stored in novel capacitors that are incorporated in the body of the surfboard. Energy can be generated by solar or water power while surfing or by passing waves, for example, while waiting for a big wave. An output jet provides thrust to catch a wave, to return to the wave breaks, or to avoid a hazard. A novel fin output jet increases stability and maximizes thrust. Self-contained, self-recharging embodiments are low cost, lightweight, safer, and good for the environment.

Abstract: The present invention relates to a propulsion arrangement for a marine vessel, which propulsion arrangement comprises an internal combustion engine, a shaft arrangement and a steerable thruster unit. The marine vessel further comprises an electric generator or a combined electric generator and motor in connection with the propulsion arrangement. In order to reduce space requirements and required equipment as well as to raise efficiency, the shaft arrangement comprises a main shaft extending from the internal combustion engine to a first angle gear and a drive shaft extending from the first angle gear to a second angle gear in the steerable thruster unit. The electric generator or the combined electric generator and motor is connected to the drive shaft of the shaft arrangement after the main shaft and the first angle gear are connected thereto.

Abstract: A device capable of translational movement has a base capable of movement across a ground surface or across or through a liquid surface. The base mounts one or more wind turbines aligned substantially horizontally in use, and a drive element operable to move the base. The drive element is powered directly or indirectly by the turbine or turbines. The turbine(s) are such that the turbine operates over at least a wide range of wind directions relative to the device. In the preferred form the turbines are spaced outwardly from the base so as to provide a vehicle space between the turbine or turbines and the base.

Abstract: At least one embodiment of the invention relates to supplying ships in a harbor with external energy in order to prevent the formation of soot and CO2. For this purpose it is already known to supply ships with power from the wharfage. One problem in such a power supply provided from the wharf is that differences in the harbor's water level must be balanced for the power supply of a ship in the harbor. Furthermore, the operational readiness of such a power supply on land may be adversely affected, such as in the case of high water. At least one embodiment of the invention proposes a buoyant harbor power supply, e.g. the components of the harbor power supply are disposed on or in a buoyant device, particularly a barge.

Abstract: Illustrative marine propulsion systems are disclosed. In a non-limiting, illustrative embodiment, a marine propulsion system includes a pump housing that is configured to be disposed below a waterline of a marine vessel and a centrifugal pump assembly that is disposed in the pump housing. The centrifugal pump assembly includes an inlet pump stage configured to receive inlet water and to discharge impulse water. The centrifugal pump assembly also includes an outlet pump stage that includes an impulse turbine wheel configured to rotate about an axis responsive to the impulse water and an outlet pump stage impeller integral with the impulse turbine wheel. The outlet pump stage impeller is configured to rotate about the axis.

Abstract: A machine useful for ship propulsion purposes includes a ship propulsion motor with two concentric air gaps. In one embodiment, the machine includes a rotor with an inner rotor core and an outer rotor core; and a double-sided stator with an inner stator side and an outer stator side. The double-sided stator is concentrically disposed between the inner rotor core and the outer rotor core.

Abstract: A differential displacement electromagnetic device providing motion over a support frame. Permanent electromagnets are fixedly mounted to a carriage and angularly oriented relative to the support frame lengthwise axis. Upright anchor columns project transversely from the support frame, and are interconnected by tension springs. A movable block is slidingly carried over both rails including a pair of opposite side spring loaded arms, carrying floating electromagnets. A bracket mount carries two spaced pivotal axles, and pivotally mounted rocker arms carrying corresponding permanent magnet. The rocker arms are sized in such a way as to be pivotably movable between a first limit position, where the permanent magnets abut against the angularly oriented electromagnets, and a second limit position, where the permanent magnets abut against the floating electromagnets.

Abstract: A watercraft propulsion device 10 has a linkage comprising a vertical drive link (20), a support link (12), an upper control link (50) having a forwardly extended handle bar (52), and a lower propulsion link (30) having a horizontal propulsion fin (32) backwardly extended therefrom. The control and propulsion links (50, 30) are interconnected by said drive link (20), which is capable of conveying propulsive oscillatory motion to the propulsion link (30) by means of a linear power actuator (90), and by the support link (12), which is pivotally connected a transom bracket (60) about a substantially vertical axis.

Abstract: An electrical linear motor for propelling a marine vessel through a liquid medium, comprises a housing secured to the marine vessel and submerged in the liquid medium, an insert within the housing and having at least two electrical coil windings disposed on internal walls of the insert; a thruster subassembly moves between the internal walls of the insert, the thruster subassembly having a front cover, an internal channel with check valve and at least two sets of permanent magnets attached to the thruster subassembly and maintained in sufficiently close proximity to the electrical coil windings so that an electromagnetic field created by a controlled energizing of the electrical coil windings interacts with a magnetic field from the permanent magnets to provide a resulting linear force, which causes a reciprocating linear motion of the thruster subassembly, wherein the check valve is in an open position during a back stroke of the thruster subassembly so that the liquid medium flows freely through the thruste

Abstract: An apparatus is disclosed for a hybrid electric power system for use in a multi-wheeled hybrid electric vehicle, and particularly for use in hybrid electric vehicles designed for operation in hostile environments where reliability and survivability of the propulsion system of the vehicle are important. The hybrid electric power system advantageously comprises at least one segmented electrical machine having multiple pairs of parallel stator segments with a magnetic rotor segment between each pair, for generating power from a thermodynamic engine, or for providing power to a driven wheel of the hybrid electric vehicle. A hybrid electric power system is also provided which comprises at least one distributed segmented electrical machine which comprises a distributed electrical energy storage system.

Abstract: A thrust generating apparatus which is positioned under water and configured to generate a thrust by ejecting water includes a duct-shaped stator provided with a plurality of armature coils, and a plurality of ring-shaped rotors which are arranged radially inward of the stator and provided with permanent magnets respectively corresponding to the plurality of armature coils, wherein the plurality of rotors are arranged in series in a rotational axis direction thereof and each of the rotors has a propeller vane protruding radially inward. A thrust generating apparatus is capable of outputting a high driving power without increasing a propeller diameter.

Abstract: A modular removable externally mountable diesel electric thruster system using azimuthing thrusters and a dynamic positioning system for positioning floating semi-submersible vessels with a ballasted waterline and at least one submerged pontoon.

Abstract: Fuel efficient power system for electric boat is provided. In starting a clutch is not activated if a drive shaft of an electric motor does not rotate at a predetermined speed, a power controller gradually increases a current output to the motor until the drive shaft rotates at the predetermined speed, the third clutch is activated to transmit rotation of the drive shaft to an electrical generator, and the activated generator charges one low rechargeable battery. In response to activating a first clutch rotation of the drive shaft is transmitted to a first shaft, a bevel gear clutch is activated to transmit rotation of the first shaft to a propeller via a reduction gear. In response to moving the boat the first clutch is disengaged and a second clutch is engaged for transmitting rotation of the drive shaft to the second shaft, and a gearbox for increasing propeller speed.

Abstract: The invention provides a flywheel-based propulsion system for cable ferries and method of operating such a propulsion system. A flywheel is energized from an on-shore source of electrical power during unloading and loading of the ferry and the flywheel is then used to generate electrical power for an electrical motor to power the ferry during the crossings.

Abstract: An unmanned, autonomous, waterborne vehicle (500) for marine use capable of operating on and below the surface of water, said vehicle (500) including an enclosed hull (501) having a payload bay (506), a hybrid propulsion system having energy collection means (504) in the form of a wing sail (503) covered with photovoltaic cells and energy storage means (511) for utilizing at least solar energy and wind energy, a plurality of sensors (508, 514) for detecting predetermined environmental parameters and a communications system (509, 515) for transmitting data from said sensors (508, 515) to and for receiving command signals from one or more remote stations and/or cooperating vehicles.

Abstract: Fuel efficient power system for electric boat is provided. In starting a clutch is not activated if a drive shaft of an electric motor does not rotate at a predetermined speed, a power controller gradually increases a current output to the motor until the drive shaft rotates at the predetermined speed, the third clutch is activated to transmit rotation of the drive shaft to an electrical generator, and the activated generator charges one low rechargeable battery. In response to activating a first clutch rotation of the drive shaft is transmitted to a first shaft, a bevel gear clutch is activated to transmit rotation of the first shaft to a propeller via a reduction gear. In response to moving the boat the first clutch is disengaged and a second clutch is engaged for transmitting rotation of the drive shaft to the second shaft, and a gearbox for increasing propeller speed.

Abstract: A remote powered propulsive device having a rudder which carries a propeller or oscillating fins which are powered by pedals alone or with hydraulic assist or by an electric motor.

Abstract: A boat hull includes a pair of spaced apart cavities formed in the bottom thereof. Mounted within each cavity is an electric trolling motor. An air purge system is provided for purging air from each cavity when the boat rests on a water surface. Additionally each cavity is closed at front and rear ends and is open from the bottom. The depth of each cavity varies from front to rear with a maximum depth occurring generally intermediately between the ends. In operation each trolling motor generates a propulsion stream of water that is directed generally rearedly and downwardly from the rear end of each cavity.

Abstract: In one possible implementation the invention is electrical generating system, having: a wind power assembly having at least two rotatable propulsion systems: said wind power assembly further having an air pump, the air pump being connected to the wind power assembly and creating an air flow when rotatable propulsion systems rotate in response to wind; and an air powered generator connected to the wind power assembly, the air powered generator capable of creating electrical current as a result of the air flow from the wind power assembly.

Abstract: An improvement to a conventional surfboard includes an impeller and an electric motor contained primarily within the body of the surfboard, whereby performance of the surfboard is substantially unaffected by the presence of the impeller and the electric motor. The electric motor is operatively connected to the impeller for providing a forward thrust of the surfboard. The improvement to the conventional surfboard also includes a throttle for selective control of the electric motor for operating the impeller to provide a forward thrust of the surfboard, the throttle being configured for use by a surfer lying in a prone position on the smooth top surface of the body of the surfboard. An extent of the surfer's energy that otherwise would be expended during paddling can be preserved for riding waves by using the impeller to provide the forward thrust during paddling.

Abstract: Vessel comprising a motor/generator assembly (10), the motor/generator assembly (10) comprising a drive unit (11) and a propeller (12) attached to the drive unit (11) for providing propulsion to the vessel (1) or for generating electric power. The assembly (10) further comprises an attachment arm (13), the drive unit (11) and propeller (12) being attached to one end of the attachment arm (13), and an other end of the attachment arm (13) being attached to the vessel (1) by means of an actuator (15). The actuator (15) is arranged to extend the drive unit (11) and propeller (12) into the water and to retract the drive unit (11) and propeller (12) from the water.

Abstract: A mount for securing a trolling motor to a watercraft has a base, a main arm, a motor coupling, and a linkage. The motor coupling is configured to rotatably retain the trolling motor. The main arm is pivotally coupled to the base. The linkage is pivotally coupled with the base and the main arm and extends within the main arm to contact the motor coupling for actuating rotation of the motor coupling between a first position when the main arm is in a stowed position, and a second position when the main arm is in a deployed position.

Abstract: An autonomous aquatic vehicle with one or more fuel cells, a controller, a plurality of sensors, a battery, and at least one electric motor and propeller. The one or more fuel cells provide power to the battery, and the battery provides power for the vehicle. Seawater is provided to anodes of the fuel cell and air or oxygen is provided to the cathode to produce power for supply to the battery. The seawater-anode reaction creates waste or byproduct that tends to decrease output of the fuel cell. The waste or byproduct is automatically flushed from the fuel cell using seawater.

Abstract: A propulsion and/or electrical current generation device (26) in a marine craft, interposed between an engine block including a drive shaft (28) mounted on a bearing P1 and a reducing gear/reversing gear block (20) including a driven shaft (38) mounted on a bearing P2, characterized in that this generation device (26) includes a housing (40) that is connected to the engine block, a stator S that is integral with this housing, and a rotor R that is connected to the drive shaft (28), mounted on a bearing P3 that is arranged in the housing.

Abstract: A diver propulsion system includes separate operatively associated battery, motor, transmission, and clutch modules.

Abstract: An outrigger for attachment to a host vessel, including: a flotation pod; a frame connected to the pod and connectable to the host vessel; at least one solar cell mounted on the frame; a battery connected to the at least one cell; and an electric motor mounted on the frame and connected to the battery.

Abstract: A propulsion system for a marine vessel includes a first electric machine coupled to a first drive shaft configured to provide propulsion to the marine vessel, and a second electric machine coupled to a second drive shaft configured to provide propulsion to the marine vessel, in a first mode of propulsion system operation, the first electric machine is configured as a generator to supply power to the second electric machine. The second electric machine is configured as a motor to drive the second drive shaft. A method of operating the propulsion system and a vessel including the propulsion system are also described.

Abstract: A ship has electrical consumers connected to an electrical distributor by respective supply lines for delivering electrical power. A connector device connects a shore cable with a selected one of the supply lines for delivering the electrical power towards the electrical distributor, the selected one of the supply lines being a supply line to a thruster.