A navigation method for a ship which includes: a plurality of main generators that feed power to navigation equipment used in normal navigation and appliances for the living quarters provided within a ship body; and an emergency generator that feeds power to emergency equipment in case of fire or flood. The navigation method includes: an emergency power feeding step for feeding power to the emergency equipment using the emergency generator when at least one of the plurality of main generators is disabled due to fire or flood; and a return-to-port power feeding step for feeding power to return-to-port equipment, required for navigation for returning to port, using the main generators and the emergency generator after the fire or flood has subsided.

A boat-mounted wind power assembly for powering devices of a boat includes a first shaft that is rotatably coupled to and extends vertically from a boat. A plurality of blades is coupled to and extends from the first shaft. A generator is operationally coupled to the first shaft. A rectifier is operationally coupled the generator. A battery, which is rechargeable, is operationally coupled to the rectifier. The battery is selectively couplable to devices of the boat. The blades are configured to convert kinetic energy of wind into rotation of the first shaft. The generator is positioned to convert rotation of the first shaft into unstable alternating current. The rectifier is positioned to convert the unstable alternating current from the generator to direct current so that the battery is charged by the generator. The battery is configured to supply direct current to power the devices of the boat.

A boat-mounted wind power assembly for powering devices of a boat includes a first shaft that is rotatably coupled to and extends vertically from a boat. A plurality of blades is coupled to and extends from the first shaft. A generator is operationally coupled to the first shaft. A rectifier is operationally coupled the generator. A battery, which is rechargeable, is operationally coupled to the rectifier. The battery is selectively couplable to devices of the boat. The blades are configured to convert kinetic energy of wind into rotation of the first shaft. The generator is positioned to convert rotation of the first shaft into unstable alternating current. The rectifier is positioned to convert the unstable alternating current from the generator to direct current so that the battery is charged by the generator. The battery is configured to supply direct current to power the devices of the boat.

This ship includes a ship body, a fuel tank chamber, a stern-side engine room, a bow-side engine room, a main fuel line and a sub-fuel line, and a pump mechanism. The main fuel line connects a fuel tank, a stern-side power generation unit, and a bow-side power generation unit through the bow-side engine room. The sub-fuel line connects at least the fuel tank and the stern-side power generation unit, and is disposed through a section different from the bow-side engine room through which the main fuel line passes. The pump mechanism selectively feeds fuel into the main fuel line or the sub-fuel line from the fuel tank.

A buoyant vessel having a hull and a drive system mounted to the hull, the system having a rectifier, a generator, an AC bus in communication with shore power or a charging system and the rectifier, a DC bus in communication with the rectifier, at least one energy storage system, an inverter, a prime mover, a load regenerating device, and a control and monitor system which has predefined specifications for at least one of: storage units of at least one energy storage system; stored therein and wherein the control and monitor system is adapted to: automatically control the DC/DC converters, relieve a current draw from one or more storage units, provide charging current, and automatically draw power and redirect energy.

A buoyant vessel having a hull and a drive system mounted to the hull, the system having a rectifier, a generator, an AC bus in communication with shore power or a charging system and the rectifier, a DC bus in communication with the rectifier, at least one energy storage system, an inverter, a prime mover, a load regenerating device, and a control and monitor system which has predefined specifications for at least one of: storage units of at least one energy storage system; stored therein and wherein the control and monitor system is adapted to: automatically control the DC/DC converters, relieve a current draw from one or more storage units, provide charging current, and automatically draw power and redirect energy.

A boat having an electric motor coupled with an electrical store is disclosed. The electrical store includes a storage element, and positive and negative poles in current-conducting connection with the storage element. An isolating circuit element is operatively connected to a user activatable emergency stop switch. The isolating circuit element is configured to, upon activation of the emergency stop switch, isolate the current-conducting connection between the storage element and at least one of the poles.

A boat having an electric motor coupled with an electrical store is disclosed. The electrical store includes a storage element, and positive and negative poles in current-conducting connection with the storage element. An isolating circuit element is operatively connected to a user activatable emergency stop switch. The isolating circuit element is configured to, upon activation of the emergency stop switch, isolate the current-conducting connection between the storage element and at least one of the poles.

An oceangoing vessel exhaust pipe coupling used to temporarily couple to an oceangoing vessel exhaust pipe. Installation and removal of the coupling only requires a simple mechanism with three translational degrees of freedom and one rotational degree of freedom, thereby enabling remote coupling. The coupling adapts to a wide array of exhaust pipe shapes and sizes. This is accomplished by a unique shape that allows stable and balanced resting position on top of an exhaust pipe as well as a two-chamber configuration, wherein the two chambers are separated by a permeable partition. Furthermore, the unique shapes of the chambers deflect the exhaust gas stream towards the outlet of the coupling, regardless of exhaust pipe style, thereby increasing capture efficiency and extending the life of an attached fabric flexible hose.

A boat stabilizer system includes a first gyro stabilizer configured to be arranged inside a hull, a first fin stabilizer including a fin configured to be arranged outside the hull and move relative the hull, and a power transmission interconnecting the first gyro stabilizer and the first fin stabilizer. The power transmission is arranged to transfer energy derived from precession torque of the first gyro stabilizer to the first fin stabilizer to actuate the fin.