Abstract: A power unit is housed in a casing, and a screw (propeller) is disposed outside the casing, the screw being driven by the power unit. The casing is formed as a watertight case in a substantially rectangular parallelepiped shape with a left-right width direction being a longitudinal direction, and the case has at least a front face portion coupled to a stern portion and a substantially flat upper face portion at a substantially same height as a top portion of the stern portion.

Abstract: A submersible vehicle for use in water includes a vehicle body and a hybrid vehicle propulsion system to propel the vehicle body through the water. The hybrid vehicle propulsion system includes a passive thrust system and an active thrust system. The passive thrust system includes a force redirector and a buoyancy control system. The buoyancy control system is operable to selectively generate vertical thrust by varying a buoyancy of the submersible vehicle and the force redirector is configured to generate a glide thrust responsive to changes in the elevation of the submersible vehicle in the water. The active thrust system includes a thruster mechanism operable to selectively propel and/or steer the vehicle body through the water.

Abstract: A device for charging at least one electric battery (1) on board a boat comprises a propeller (2) adapted to immersed in water through the movement of the boat be driven to rotate a axle (3) and an electric direct current machine (8) connected to the axle and adapted to generate voltage to the battery for charging thereof upon rotation of the axle. A DC/DC-converter (7) is arranged to convert the voltage generated by the electric machine through the rotation of the axle to a higher voltage suited for charging the battery. A member (10) is adapted to measure the voltage generated by the electric machine and a micro processor unit (9) is adapted to control the DC/DC-converter on the basis of voltage data delivered by said member.

Abstract: A ship drive system includes a first and one second drive shaft for driving a respective propulsion unit, wherein each of the electric drive shafts includes at least one speed-variable generator driven by an internal combustion engine for generating a motor voltage having a variable amplitude and variable frequency, and at least one speed-variable drive motor that is supplied with the voltage and coupled to the propulsion unit. The first and second drive shafts can be switched from a first operating state, in which they are electrically disconnected from each other, to a second operating state, in which they are electrically coupled to each other such energy can be transmitted from the at least one generator of the one drive shaft to the at least one drive motor of the other drive shaft. To this end, the at least one generator includes a superconductor winding.

Abstract: The invention relates to a method for improving the propulsion efficiency of vessels. The improvement is obtained by utilizing wave induced variations in propeller inflow, i.e. the speed of water flowing towards the propeller. The wave induced water speed variation is used to calculate the propeller speed in a way so that the propeller speed is optimal with respect to the total propulsion efficiency. The optimal propeller speed is determined by solving an optimization problem formulated as the maximization of the ratio of energy delivered by the propeller and the energy delivered to the propeller. The method may be used for vessels with one or more propellers.

Abstract: An electric outboard drive adapted to be mounted on a transom of a boat through a mounting bracket includes a driving device and a propelling device. Through engagement of a first transmission shaft with a second transmission shaft, the power of an electric motor of the driving device is transmitted to a propeller of the propelling device. As a result, when the electric motor drives the first transmission shaft to rotate, the propeller is rotated by the transmission of the second transmission shaft to propel the boat.

Abstract: There is provided a hybrid outboard motor capable of transmitting motive power of a power source appropriately and efficiently in a limited space while achieving compactness, high performance, and the like. The hybrid outboard motor includes: a casing; a power unit housed in the casing; a screw disposed outside the casing, the screw being driven by the power unit; a power transmission system transmitting motive power of the power unit to the screw; an internal combustion engine and an electric motor serving also as a generator, the internal combustion engine and the electric motor being arranged in parallel in a beam direction in the casing; and a first clutch disposed between the internal combustion engine and the electric motor, wherein one or both of the internal combustion engine and the electric motor are connected to a propulsion unit including the screw so as to rotate it.

Abstract: Cooling systems and methods for hybrid marine propulsion systems are disclosed. A first cooling circuit is arranged to convey raw cooling water through an internal combustion engine and to at least one drive component of a drive unit for the marine propulsion system. A second control circuit is arranged to convey raw cooling water through an electric motor. The system is arranged such that raw cooling water in the second cooling circuit is conveyed to the first cooling circuit to cool the drive component without cooling the component of the internal combustion engine.

Abstract: The invention relates to a drive device (1) for water vehicles comprising a propeller (2), a drive mechanism (3) for driving the propeller (2), and a magnetic coupling (4) which is arranged between the propeller (2) and the drive mechanism (3), wherein the magnetic coupling (4) comprises an outer magnetic element (7), an inner magnetic element (9) and a can (11), and wherein the can (11) is arranged between the inner magnetic element (9) and the outer magnetic element (7).

Abstract: There is provided a ship, in particular a cargo ship. It has a plurality of Magnus rotors, wherein associated with each of the plurality of Magnus rotors is an individually actuable electric motor (M) for rotating the Magnus rotor, wherein associated with each electric motor (M) is a converter (U) for controlling the rotary speed and/or the rotary direction of the electric motor (M).

Abstract: A personal watercraft body comprises a recess configured to receive similarly shaped cassettes. A first cassette may be motorized to propel the body relative to a body of water. A second cassette may be non-motorized and may include a storage space therein for storing personal items. An insert may be disposed between the cassettes and the recess to orient and fit the cassettes within the body.

Abstract: A water vehicle moving on or in a liquid and including a flotation element (1) that is connected by a connection member (6) to a carrier (3), the water vehicle being characterized in that the connection member (6) is shaped so as to enable the carrier (3) to assume at least two positions, namely:—a raised position where the longitudinal axis of the carrier (3) and those of the flotation element (1) substantially extend into the same horizontal plane, the carrier (3) then being on the surface and capable of making up a central shell; and—a lowered position where the carrier (3) extends under the plane including the longitudinal axis of each of the flotation element (1), the carrier (3) then being submerged.

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: The invention relates to a motorized watercraft with a control device (1) and with a drive unit (30) having a water propeller that is driven by an electric motor (31). The electric motor (31), an operating unit (10), a motor controller (20), a battery controller (50) and a battery (60) are placed in a vehicle hull, and the water propeller is mounted in a flow channel in the vehicle hull. In order to connect the controlling components and the components to be controlled by means of a system architecture, a system bus and of a man-machine interface, the invention provides that the operating unit (10), the motor controller (20), and the battery controller (50) are data-connected by means of a communications device controlled by the control device (1). This enables an, in particular, fail-safe transmission of data, a constant monitoring of the system components, and when required, an emergency shut-down.

Abstract: A marine power system comprises a motor for providing propulsion. It also comprises an energy storage unit (ESU) for storing and supplying energy to the motor. A prime power system is connected to the ESU and motor for selectively providing energy to these subsystems through a bus. The motor selectively receives energy from the prime power system and the ESU and can supply regenerative braking energy to the bus. The system can also accommodate multiple generator sets providing system power. The ESU can also provide starting power for the prime power system. Alternately, the prime power system drives a mechanical power system output shaft connected to the motor, and the marine system comprises an alternator driven by the prime power system output shaft. The ESU can transmit energy to the alternator. The prime power system can be located on a tugboat displacing a barge carrying the energy storage unit.

Abstract: The disclosed invention is directed to a watercraft which comprises at least one main force member attached to at least one wing; the main force member and/or wing and/or a float attached to the wing comprise sufficient displacement to provide flotation for the craft and its payload. Connected to the main force member is a force transmitting member, to which the engine is connected. The engine may comprise a person or another engine (conventional, electronic, wind, etc.). The engine may comprise a weight which undergoes vertical translation, thereby producing the force transmitted by the force transmitting member to the main force member.

Abstract: A mixed propulsion system for a seagoing vessel such as a liquid natural gas carrier including a gas turbine engine is described. The vessel has at least one electric propulsion drive and a plurality of prime movers of different types each coupled directly to drive an electrical generator. The outputs of the several generators are connected to at least two electricity distribution switchboards to supply the power requirements of the vessel, and each electric propulsion drive is cross-coupled to receive power selectively from either switchboard such that in the event of a single failure in a switchboard or prime mover or both power can be maintained to both propulsion drives.

Abstract: A method for operating a vessel is provided. The method can include determining the most efficient power source from a plurality of power sources for operating the vessel. The power sources can include a battery bank and an AC power source. The method can also include drawing power from the most efficient power source to operate the vessel; harvesting energy from electrical rotating sources; monitoring the battery bank; and charging the battery bank when a state of charge of the battery bank drops below a predetermined state of charge, wherein the charging is performed using the harvested energy, the AC power source, an external power source, or a combination thereof.

Abstract: An enhanced counter-rotating electric motor and an associate propulsion system for use with a water-vehicle includes a motor housing, a stator within the housing that rotates about a central axis in one direction, an armature within the stator that rotates about the central axis in an opposite direction from the stator, a first axle that is secured to the stator and extends out from the housing, a second axle that is secured to the armature and extends out from the housing, water-tight rotational seals about each of the two axles, a centrifugal-force-balancing electrical connection mechanism that supplies functioning electrical communication between the motor and external electrical circuitry while operating the motor, and a propeller secured to each said axle.

Abstract: There is provided a ship, in particular a cargo ship. It has a plurality of Magnus rotors, wherein associated with each of the plurality of Magnus rotors is an individually actuable electric motor (M) for rotating the Magnus rotor, wherein associated with each electric motor (M) is a converter (U) for controlling the rotary speed and/or the rotary direction of the electric motor (M).

Abstract: Provided is an apparatus for generating electricity required by an LNG carrier which stores LNG, which is obtained by liquefying natural gas to ultra low temperature in a gas field, in an LNG storage tank and carries the stored LNG. The apparatus includes: a reformer reforming boil-off gas occurring in the LNG storage tank and producing synthetic gas; and a fuel cell generating electricity through an electrochemical reaction of the synthetic gas produced by the reformer.

Abstract: A gas-fired superconductive electrically propelled ship is provided with a cargo tank 1 (fuel tank) for storage of LNG 2, a vaporized gas feed line 3 for feeding of vaporized gas 2? produced in the cargo tank 1 as fuel to dual-fuel engines (driving engines) 5 for generators 6, a gas heater 4 incorporated in the vaporized gas feed line 3 for heating of the vaporized gas 2?, a propelling superconductive motor 7 driven with electric power produced by the generator 6, a heat pump 15 for cooling the superconductive motor 7 and maintaining low temperature of the motor and an LNG gasification line 26 for feeding of LNG 2 from the cargo tank 1 as cold source for compression radiation treatment in the heat pump 15 and for guiding of the vaporized gas 2? having treated to the cargo tank 1 and to the vaporized gas feed line 3 at entry-side of the gas heater 4.

Abstract: A lightweight watercraft device designed for use by general consumers and those without means or desire for a traditional, larger boat. The device comprises a pilot seat, an outboard electric motor and steering means mounted to a lightweight foam hull wrapped in a composite shell. The hull comprises a central region bounded by two forward sweeping sides that form the bow of the vessel. The sides taper from bow to stern, terminating at the rear of the boat in a squared configuration. The hull is a unitary foam structure, wrapped in plys of composite material for structural reinforcement. A plank board is bonded between plys along the central axis of the boat, and provides support for the seat, a rear transom board and an area for carrying supplies. Mounted on the transom board is the outboard electric motor, which provides motive power for the vessel.

Abstract: A propulsion device for a marine vessel, the propulsion device comprising an electrical machine with integral magnetic gearing, which comprises three members, namely a first or inner rotor comprising a first plurality of permanent magnets, a second rotor in the form of a plurality of ferromagnetic pole pieces, and a stator which is associated with a plurality of 3-phase windings and to the periphery of which a plurality of second permanent magnets are fixed. The magnetic pole piece rotor is connected to a drive shaft provided with a propulsion means for providing propulsion to the marine vessel. The first or inner rotor is free to rotate about the drive shaft. The pole pieces of the second rotor are arranged to magnetically couple the permanent magnets of the first or inner rotor to the second permanent magnets on the stator.

Abstract: A watercraft propulsion system is disclosed, including: a mechanical drive assembly capable of coupling to and being driven by a power source element of a propeller-based watercraft engine; and a pair of paddle drums coupled to and driven by the mechanical drive assembly, thereby propelling the watercraft through a body of water. For example, the mechanical drive assembly is adapted to couple to a drive shaft power source element, while or to an electrical wiring power source element within a positioning shaft. The paddle drums include blades capable of producing thrust via contact with a solid bottom surface containing the body of water, and/or with a top surface of the body of water. When applied to outboard engines, surface drive engines, air cooled marine engines and trolling motors, this system allows for navigation of extremely shallow water without damaging equipment, scarring lake beds or destroying native grasses.

Abstract: This ship 10 is a ship for transporting cargos such as containers, and it is possible to efficiently perform the cargo handling operation for cargos. A lower hold 16 is provided below a deck 15 in a hull 14. The deck 15 is provided with protruding portions 17 and 18 protruding in the right and left side directions of the hull, and a plurality of frameworks 21 each including vertical pillars 22 and 23 fixed to the respective protruding portions 17 and 18 and a horizontal beam 24 through which the vertical pillars 17 and 18 are connected to each other are provided for the deck 15. Openable partition covers 25 are provided between frameworks adjacent to each other, and an upper hold 26 is formed on the deck 15 by the partition covers 25 and the deck 15. The cargo handling operation for the lower hold 16 is performed by an inboard crane 33 provided in the lower hold 16, and at the same time, the cargo handling operation for the upper hold 26 is performed by a quay crane 37.

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 electric boat comprising a boat housing with a rechargeable battery bank; two wind turbines disposed in sides of the boat housing, the wind turbines are driven by oncoming wind; a first turbine system operatively connected to the wind turbines via a first drive shaft; a transformer's power inverter/charge controller operatively connected to the rechargeable battery and to the first turbine system; an electric motor operatively connected to the transformer's power inverter/charge controller or rechargeable battery; jet pump for propelling the boat, the jet pump is operatively connected to the electric motor; and a plurality of solar panels disposed on the boat housing operatively connected to the rechargeable battery.

Abstract: The main propulsion and drive system of a merchant vessel such as a freighter or tank vessel, or a military vessel is supplemented by an auxiliary propulsion and drive system that includes at least one, but preferably a pair of auxiliary propellers that flank the main propeller at port and starboard positions and each of which are attached via a drive shaft through a gear train, which can optionally include a clutch mechanism, to an auxiliary motor or motors. In order to reduce the drag when the main propeller is disabled, segments of a wake field modifying propeller duct are mounted for repositioning to form at least a partial housing or cowling that diverts the water over the exterior surface of the duct and minimizes contact with the stationary blades of the main propeller as the vessel moves through the sea when powered by the auxiliary propulsion system.

Abstract: Some embodiments provide a propulsion system for a marine vessel that includes an electric motor-generator coupled between an internal combustion engine and a propeller through one or more clutches. The propulsion system includes a controller configured to adjust a torque load of the electric motor-generator based on factors such as rotational speed, propeller torque, and/or a peak torque output of the internal combustion engine. Some embodiments provide a propulsion assembly component including an electric motor-generator that can be installed in an existing marine propulsion system. Embodiments also provide methods for propelling a marine vessel.

Abstract: One or more embodiments of a system for operating a vessel is provided herein. An illustrative system can include a plurality of power sources for operating the vessel. The power sources can include a battery bank and an AC power source. The system can also include an auxiliary device disposed on the vessel, wherein the auxiliary device comprises an electrical rotating source. Energy can be harvested from the electrical rotating source and transferred to the DC power source, a load of the vessel, or both. The illustrative system can also include a power management system that can include a processor; a data storage in communication with the processor; and a plurality of computer instructions stored on the data storage.

Abstract: A method for operating a vessel is provided. The method can include determining the most efficient power source from a plurality of power sources for operating the vessel. The power sources can include a battery bank and an AC power source. The method can also include drawing power from the most efficient power source to operate the vessel; harvesting energy from electrical rotating sources; monitoring the battery bank; and charging the battery bank when a state of charge of the battery bank drops below a predetermined state of charge, wherein the charging is performed using the harvested energy, the AC power source, an external power source, or a combination thereof.

Abstract: An electrical cell for the propulsion of a device in an aquatic medium includes a first, second and third chamber forming a housing. The first chamber has an auxiliary electrical cell and a command and control module for the electrical propulsion cell, the second chamber a main electrical cell and members for the controlled admission and regulation of water flow from the aquatic medium in order to form an activation electrolyte for the main cell, and the third chamber a module for triggering the admission by suction of water and the discharge by escape of effluents from an admission valve and an escape valve. The command and control module activates the auxiliary electrical cell to generate electrical energy temporarily and the admission by suction of water from the aquatic medium and the discharge of effluents in order to produce electrical energy from the main electrical cell during a cruise phase.

Abstract: An outboard electric motor kit that includes an electric motor assembly with a unitized propeller hub, a transom mount, a rechargeable electric battery, and an optional recharger. The assembly includes an electric motor unit located in an upper housing. A lower tube stem is attached and that extends downward from the upper housing to a lower housing. Formed on the lower housing is a receiving cavity with a rearward facing propeller hub opening. A drive shaft coupled to the motor unit extends downward inside the lower tube stem and mounted to a gear support block located in the receiving cavity. Mounted on the end of the drive shaft is a main gear. Mounted on the gear support block is a fixed axle that extends coaxially aligned through the propeller hub opening. Extended through the opening and coaxially mounted over the fixed axle is a removable propeller hub assembly.

Abstract: The disclosure relates to a module for producing electric power for a main ship, capable of supplying the power required to propel the main ship, the module being produced in the form of a secondary ship separate from the main ship and including a power plant, the secondary ship being provided with an electrical connector for establishing an electrical connection between the power plant and the main ship and a lock for interlocking with the main ship in order to secure the former from moving from the main ship, the electrical connector being suitable for supplying electric power to the propulsion motor of the main ship.

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: The invention relates to an arrangement for improving load response in a marine vessel, which vessel comprises a propulsion system (1) including an internal combustion engine (2), a generator (3), a main switchboard (4), and an electric propulsion unit (5). A power bank (6) is connected to the main switchboard (4), whereby the power bank (6) is arranged to store additional electric energy supplied by the generator (3) by way of the main switchboard (4). The additional energy stored in the power bank (6) is arranged to be used together with the electric energy supplied by the generator (3) in order to increase the load response to the electric propulsion unit (5) at a given time.

Abstract: A water navigable vessel or glider can transport cargo across oceans and other bodies of water without the use of fossil or nuclear fuels. The vessel includes a housing, a cargo or payload area within the housing, one or more control fins attached to the housing, a ballast within the housing, an expandable and contractible container configured to receive a clathrate and maintain a minimum amount of pressure on the clathrate within the housing in proximity to the ballast, and an intake valve coupled to the ballast. The clathrate changes state, thereby changing the buoyancy of the glider, and causing the glider to move through the body of water.

Abstract: A gondola drive for a floating device has an underwater housing circulated around by water. The gondola drive contains a drive module which has a drive module housing and a shaft disposed therein, a transmission module with a transmission module housing and a transmission disposed therein and a propeller. The drive module and the transmission module are each configured as separate components connected to one another such that the drive module housing and the transmission module housing form at least a part of the underwater housing and that the shaft is coupled to the transmission for driving the propeller.

Abstract: The methods and apparatuses of the present invention provides for powering and maneuvering (forward, reverse and steering) systems for amphibious vehicle, marine vessel or ground vehicle operation and control. An improved propulsion system may incorporate the use of electric motors combined with impellers which use positive and negative magnetic torque applications and allows for new control strategies when used in water or on the ground. More precise control of the motoring and steering forces is provided which is suitable for use in a variety of amphibious, marine vessels or ground vehicle applications. Various types of electric drive motor/generators may be incorporated for use therein. Intelligent motion control systems may provide for improved vehicle control that can provide motive force and braking force in a precisely controlled manner that significantly improves performance and has faster control dynamics incorporating a fully integrated electrical braking and maneuvering system.

Abstract: To prevent water intrusion, trolling motor heads cannot utilize ventilation methods of removing heat from power electronics. The assembly and method of the present application utilizes the existing metal column of a trolling motor to remove heat from the power electronics by utilizing a metal adapter that has flat outside surfaces for the power electronics and a round inside surface for the metal column.

Abstract: In one aspect, a submarine with a boat hull and a propulsion drive for the submarine the propulsion drive is arranged outside the boat hull and comprises a housing and a first electric motor, with the housing embodying a channel for a flow of water through the channel in a main direction of flow from an inlet to an outlet of the channel, and with the first electric motor featuring a rotor which is arranged in the channel and is supported rotatably around an axis of rotation in the housing, with the rotor being embodied in the shape of a ring with a ring inner side and a ring outer side, and with blades for propelling the submarine being arranged on the ring inner side of the rotor.

Abstract: An immobilizer receiver for an outboard motor includes a control unit that is housed in a liquid-tight case and arranged to receive an authentication code, an antenna wire arranged to receive the authentication code, and an answer-back buzzer arranged to provide an indication that the authentication code has been received, which are housed in a recessed section of a housing. A distance from an opening surface to a bottom surface of the recessed section of the housing is arranged such that the antenna wire can receive the authentication code even in a case that a hull is made of metal. Then, the opening surface of the housing is preferably mounted on a vertical or approximately vertical surface of the hull. Therefore, it is possible to secure a receiving function of the antenna wire that is housed on the bottom surface of the recessed section. In addition, the answer-back buzzer is protected against coming in contact with water.

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: 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 hybrid propulsion and energy management system for use in marine vessels and other variable demand propulsion applications monitors and draws energy from various energy sources dynamically to implement multiple operating modes and provide efficient system operation across a range of propulsive demands, altering the operation and output of various energy sources in response to propulsive load demands, hotel loads and auxiliary energy demands. The propulsion system incorporates at least two propulsive sources, including at least one main propulsive engine and at least one motor-generator unit arranged to drive a common output shaft, and the energy management system dynamically shifts operation of each of the two sources to satisfy propulsive demands. The main propulsive engine and the motor-generator unit are capable of driving the common output shaft both independently and simultaneously.

Abstract: The present invention allows for the replacement of polluting and inefficient diesel-based marine propulsion systems. A natural-gas burning power plant in combination and at least one renewable energy source are combined to drive a ship's propulsion during times when the power plants are not in use for other activities including desalination and oil exploration. Renewable energies are used judiciously to reduce fossil fuel requirements but the present invention does not fully rely on renewable energy, which is not always available.

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 marine articulated surface drive propulsion system is provided with a housing construction that allows the direct application of an electric motor for power onto the drive structure. Alternatively, it can include a power transmitting element for reducing the rate of rotation or the position of the motor shaft with respect to the propeller shaft. The drive can be retrofitted to existing boat hulls and does not require a dedicated hull. The electric motor can be fitted to the surface drive housing on the inside of the transom. It is contemplated that an electric motor with very small dimensions can be mounted in the drive thrust tube and ball socket, eliminating the need for U joints. Notably, if the propeller is left free wheeling it becomes the propulser for the electric motor to become a generator and recharge the batteries.

Abstract: A diver propulsion system includes separate operatively associated battery, motor, transmission, and clutch modules and a separable bracket plate and bracket base that facilitates both storage of a propulsion unit and mounting the propulsion unit on the tank of a scuba diver.