Systems and methods for righting a capsized watercraft are described. The system may include a selectively inflatable bladder inside a canvas gunwale float that can be releasably attached to one side of a boat. When the other side of the boat is lifted, the float keeps at least a portion of the lowermost gunwale above the surface of the water, thereby impeding the unwanted entry of water into the boat during righting. The inflatable bladder is sized in volume according to the size and shape of the boat. The system may include one or more floats spaced apart along the side. In another aspect, one of the floats may be attached to a paddle to create a temporary outrigger for use in climbing out of the water and into the boat.

A system and a method to warn a ship crew of potential violent motions in the immediate near future for the oceangoing vessel when operating in seas. Violent ship motions not only discomfort ship crews, damage cargos and ship structures, but also pose potential capsizing risk to ships. The system includes motion sensors; computer hardware and software; and warning devices. The sensors measure the ship roll, pitch, yaw, and rudder motions. The time histories of these motions are stored in the hardware and constantly analyzed using Finite Fourier Transform by Fast Fourier Transform (FFT) to detect the nonlinear inertial coupling effect which is newly discovered by the inventor and believed to be the root cause leading to violent motions and capsizing. Based on the inventor's theory of nonlinear instability and inertial coupling effect, the invented method detects nonlinear yaw instability potential and inertial coupling events, and provides warnings to master to reduce potential yaw nonlinear instability, to avoid inertial coupling roll response, rudder induced oscillations, and broaching, and to prevent capsize in seas.

A system and a method to warn a ship crew of potential violent motions in the immediate near future for the oceangoing vessel when operating in seas. Violent ship motions not only discomfort ship crews, damage cargos and ship structures, but also pose potential capsizing risk to ships. The system includes motion sensors; computer hardware and software; and warning devices. The sensors measure the ship roll, pitch, yaw, and rudder motions. The time histories of these motions are stored in the hardware and constantly analyzed using Finite Fourier Transform by Fast Fourier Transform (FFT) to detect the nonlinear inertial coupling effect which is newly discovered by the inventor and believed to be the root cause leading to violent motions and capsizing. Based on the inventor's theory of nonlinear instability and inertial coupling effect, the invented method detects nonlinear yaw instability potential and inertial coupling events, and provides warnings to master to reduce potential yaw nonlinear instability, to avoid inertial coupling roll response, rudder induced oscillations, and broaching, and to prevent capsize in seas.

A system and a method to warn a ship crew of potential violent motions in the immediate near future for the oceangoing vessel when operating in seas. Violent ship motions not only discomfort ship crews, damage cargos and ship structures, but also pose potential capsizing risk to ships. The system includes motion sensors; computer hardware and software; and warning devices. The sensors measure the ship roll, pitch, yaw, and rudder motions. The time histories of these motions are stored in the hardware and constantly analyzed using Finite Fourier Transform (FFT) to detect the nonlinear inertial coupling effect which is newly discovered by the inventor and believed to be the root cause leading to violent motions and capsizing. Based on the inventor's theory of nonlinear instability and inertial coupling effect, the invented method detects nonlinear yaw instability potential and inertial coupling events, and provides warnings to master to reduce potential yaw nonlinear instability, to avoid inertial coupling roll response, rudder induced oscillations, and broaching, and to prevent capsize in seas.

A system and a method to warn a ship crew of potential violent motions in the immediate near future for the oceangoing vessel when operating in seas. Violent ship motions not only discomfort ship crews, damage cargos and ship structures, but also pose potential capsizing risk to ships. The system includes motion sensors; computer hardware and software; and warning devices. The sensors measure the ship roll, pitch, yaw, and rudder motions. The time histories of these motions are stored in the hardware and constantly analyzed using Finite Fourier Transform (FFT) to detect the nonlinear inertial coupling effect which is newly discovered by the inventor and believed to be the root cause leading to violent motions and capsizing. Based on the inventor's theory of nonlinear instability and inertial coupling effect, the invented method detects nonlinear yaw instability potential and inertial coupling events, and provides warnings to master to reduce potential yaw nonlinear instability, to avoid inertial coupling roll response, rudder induced oscillations, and broaching, and to prevent capsize in seas.

Disclosed are a self-righting unmanned ship suitable for adverse sea conditions and a self-righting working mode thereof, belonging to the field of unmanned ship equipment and techniques. The unmanned ship comprises a main hull, a self-righting deck, an equipment and pipeline mast, a propeller, a radar, an air inlet and exhaust system, and a main engine system. Through the design of a watertight deck, the hull of the unmanned ship has a self-righting function, avoiding the possibility of the unmanned ship itself turning over, without installing additional self-righting equipment. Meanwhile, the internal structure and the self-righting working mode of the unmanned ship make it possible for the hull to automatically turn off the main engine and the air inlet and exhaust system when the heeling angle of the hull exceeds a certain angle, making the whole ship watertight.

A system for autonomous ocean data collection includes at least one sensor capable of collecting sensor data, at least one transmission device, and at least one computing device comprising one or more hardware processors and memory coupled to the one or more hardware processors, the memory storing one or more instructions which, when executed by the one or more hardware processors, cause the at least one computing device to generate data for transmission based on the sensor data collected by the at least one sensor, and cause the at least one transmission device to transmit the data.

A system for autonomous ocean data collection includes at least one sensor capable of collecting sensor data, at least one transmission device, and at least one computing device comprising one or more hardware processors and memory coupled to the one or more hardware processors, the memory storing one or more instructions which, when executed by the one or more hardware processors, cause the at least one computing device to generate data for transmission based on the sensor data collected by the at least one sensor, and cause the at least one transmission device to transmit the data.

An offshore power generating system has a buoyancy body shaped as a hull with a bow and aft end, and elongated mast extending up from the buoyancy body to the buoyancy body about a horizontal transverse axis. A rotor is supported in one end of the longitudinal mast for rotation about a horizontal axis. The buoyancy body is kept in position with the bow turning up into wind and incoming waves. Rotational support of the mast has a horizontal rotational axis through the center of gravity of the mast that lies in the center plane of the buoyancy body above the aft end when the buoyancy body lies in operational position in calm sea with the rotational axis of the rotational support of the mast orthogonal to the center plane of the buoyancy body. A method for on-board loading and commissioning of mast with installed rotor on-board a buoyancy body.

The present disclosure provides a carrying device and an operation method thereof. The carrying device includes: a floating platform; and at least one flexible unit provided on a bottom side of the floating plate and having a cavity formed therein. The flexible unit is deformed under a stress to reduce the friction force between the flexible unit and the solid in the water, which allows the carrying device to break free from the solid without external help.