A marine AC generator system includes a marine generator driven by an internal combustion engine and configured to generate an AC current and a rectifier configured to rectify the AC current to provide a DC current. At least one battery is configured to receive and be charged by the DC current. A battery powered inverter is configured to be powered by the at least one battery and to generate a variable current output frequency such that an AC electrical power is provided to a load when the marine generator is not running.

Disclosed is a boat with at least one combustion engine positioned on or symmetrical with the vertical median plane of the boat and two engines provided symmetrical with respect to the vertical median plane, each including a propeller in a duct with: a central section on which the propeller is positioned, a rear section leading via a rear opening onto the transom of the hull, a front section with a continuous curved profile, leading via a side opening to the outside wall of the hull, the side opening having a larger cross-section than the cross-section of the rear opening in order for the duct to include at least one converging nozzle, the front section being oriented so that the stream of water exiting from the side opening is directed towards the front and forms an angle of 20° to 60° with respect to the wall of the hull.

The present disclosure is directed to a system and a method for hydride generation. In some embodiments, the system includes an assembly for introducing hydride generation reagents into a mixing path or mixing container, where the assembly includes first chamber configured to contain a first hydride generation reagent and a second chamber configured to contain a second hydride generation reagent. A first plunger is configured to translate within the first chamber and cause a displacement of the first hydride generation reagent, and a second plunger is configured to translate within the second chamber and cause a displacement of the second hydride generation reagent. The assembly further includes base coupling the first plunger and the second plunger together.

A vessel propulsion apparatus includes a first transmission path that transmits the power of an engine to a propeller shaft, a second transmission path that transmits the power of a motor to the propeller shaft, and a controller. A first clutch cuts off the power transmission of the first transmission path in a first disconnection state, and permits the power transmission of the first transmission path in a first connection state. A second clutch cuts off the power transmission of the second transmission path in a second disconnection state, and permits the power transmission of the second transmission path in a second connection state. The controller executes tuning control of both the engine and the motor when the first clutch is switched between the first disconnection state and the first connection state and when the second clutch is switched between the second connection state and the second disconnection state.

A marine propulsion unit includes a motor driving force transmission shaft, a propeller shaft, and a shaft including one of a switching shaft and a drive shaft, and one of the motor driving force transmission shaft and the shaft includes a hollow member, and the other of the motor driving force transmission shaft and the shaft is disposed inside the hollow member.

In a marine hybrid system which includes an engine, an electric motor, a thrust generation device, and a clutch mechanism configured to be able to switch connection states therebetween, if it is determined that the engine is in an overload condition, the clutch mechanism is controlled such that a load of the engine is reduced.

A marine propulsion system includes a controller configured or programmed to perform a control to move a hull in a lateral direction by driving both a main propulsion device and an auxiliary propulsion device having a maximum output smaller than a maximum output of the main propulsion device.

A marine propulsion system includes a controller configured or programmed to perform a rudder angle change control to change a rudder angle of an auxiliary propulsion device by a predetermined angle to one side in a right-left direction of a hull with respect to a forward-rearward direction of the hull so as to move the hull along the forward-rearward direction without rotating the hull when motorized forward-rearward movement is performed to move the hull along the forward-rearward direction by driving the auxiliary propulsion device that is provided to one side of the hull in the right-left direction without generating a thrust from a main propulsion device.

A marine propulsion system includes a main propulsion device, an auxiliary propulsion device including an electric motor to drive an auxiliary thruster, and a controller configured or programmed to perform an automatic marine vessel maneuvering control to direct a bow or a stern of a hull to a target point by rotating the hull and maintain the hull, the bow or the stern of which has been directed to the target point, at the target point by moving the hull in a forward-rearward direction. The controller is configured or programmed to rotate the hull by driving the auxiliary thruster while stopping a main thruster of the main propulsion device in the automatic marine vessel maneuvering control.

A marine propulsion system includes a main propulsion device operable to rotate in a right-left direction to change a direction of a thrust, an auxiliary propulsion device including an electric motor to drive an auxiliary thruster and operable to rotate in the right-left direction to change a direction of a thrust, and a controller configured or programmed to perform a drift control to move a hull under external forces including wind and water flow while maintaining an orientation of a bow of the hull at a target orientation by rotating the hull. The controller is configured or programmed to maintain the orientation of the bow at the target orientation by rotating the hull by driving the auxiliary thruster while stopping a main thruster of the main propulsion device in the drift control.