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 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.

An underwater communications network may include spaced apart nodes on a bottom of a body of water. The underwater communications network may also include fiber optic cabling connecting the spaced apart nodes. Each node may include a frame, a node short-range navigation device carried by the frame, and an unmanned underwater vehicle (UUV) carried by the frame after delivering a fiber optic cable along a navigation path from an adjacent node. The UUV may be configured to cooperate with the node short-range navigation device during an end portion of the navigation path adjacent the frame.

An underwater communications network may include spaced apart nodes on a bottom of a body of water. The underwater communications network may also include fiber optic cabling connecting the spaced apart nodes. Each node may include a frame, a node short-range navigation device carried by the frame, and an unmanned underwater vehicle (UUV) carried by the frame after delivering a fiber optic cable along a navigation path from an adjacent node. The UUV may be configured to cooperate with the node short-range navigation device during an end portion of the navigation path adjacent the frame.

The present disclosure provides a marine vessel location awareness device and method of using the device. The marine vessel location awareness device can include electronic components such as a sensor system, a global positioning system (GPS), a tidal gauge device, an alert system, and a microcontroller. The draft sensor can be configured to measure draft data of the marine vessel. The GPS can be configured to measure the position of the marine vessel. The tidal gauge device can be configured to measure a water level of a water body the marine vessel is traveling relative to a vertical datum. The alert system can be configured to alert the marine vessel to enter an active state when the water condition transmitted to the alert system is the unsafe water condition, when the alert system is in the active state, an alert is activated.

The present disclosure provides a marine vessel location awareness device and method of using the device. The marine vessel location awareness device can include electronic components such as a sensor system, a global positioning system (GPS), a tidal gauge device, an alert system, and a microcontroller. The draft sensor can be configured to measure draft data of the marine vessel. The GPS can be configured to measure the position of the marine vessel. The tidal gauge device can be configured to measure a water level of a water body the marine vessel is traveling relative to a vertical datum. The alert system can be configured to alert the marine vessel to enter an active state when the water condition transmitted to the alert system is the unsafe water condition, when the alert system is in the active state, an alert is activated.

An imaging device that reduces differences between a bird's eye image and an actually measured distance includes imaging cameras mounted on a ship to capture peripheral images of the ship and combines the peripheral images captured by the imaging cameras to create the bird's eye image as a composite image. The imaging device includes an auxiliary camera adjacent to at least one of the imaging cameras, and a distance calculator that calculates a distance in a lateral direction using the auxiliary camera and the at least one of the imaging cameras adjacent to the auxiliary camera.

The present invention discloses a large-scale model testing system of a floating offshore wind power generation device, and a method for manufacturing the large-scale model testing system. The large-scale model testing system comprises a floating wind power generation device model, model response measurement systems and environmental parameter measurement systems. The floating wind power generation device model comprises a floating foundation and a tower, wherein a wind turbine is connected to the top of the tower. A plurality of anchoring devices is connected to the side surface of the floating foundation. Each model response measurement system comprises an IMU unit, a wind turbine monitoring unit and an anchoring tension measurement unit. Each environmental parameter measurement system comprises a buoy-type wave height meter, a wind speed and direction meter and a flow velocity and direction meter.

Disclosed is a power controller for controlling power to be supplied to at least one reefer container on a container vessel. The power controller is configured to obtain a set temperature for at least one reefer container to be transported by the container vessel. The power controller is also configured to obtain data that indicates an amount of energy available to the container vessel and determine, based on the amount of energy available to the container vessel, whether to cool the at least one reefer container below the set temperature.

Disclosed is a power controller for controlling power to be supplied to at least one reefer container on a container vessel. The power controller is configured to obtain a set temperature for at least one reefer container to be transported by the container vessel. The power controller is also configured to obtain data that indicates an amount of energy available to the container vessel and determine, based on the amount of energy available to the container vessel, whether to cool the at least one reefer container below the set temperature.