Apparatuses, methods, and systems are provided for making the harvesting of sea life efficient. For example, real-time or periodic information about the status of the many traps a fisherman may have set is communicated to the fisherman while the traps are still in the water. A fisherman can use this information to determine the best time and path for trap retrieval and reset operations to reduce fuel use and improve the catch efficiency per unit effort.

Apparatuses, methods, and systems are provided for making the harvesting of sea life efficient. For example, real-time or periodic information about the status of the many traps a fisherman may have set is communicated to the fisherman while the traps are still in the water. A fisherman can use this information to determine the best time and path for trap retrieval and reset operations to reduce fuel use and improve the catch efficiency per unit effort.

A pole-and-line fishing device includes a rotary drum, a drive motor, an electromagnetic clutch, an encoder for detecting direction and speed of rotation of the rotary drum, and a control unit for controlling the electromagnetic clutch. The drive motor can rotate the rotary drum in a forward winding direction until a load reaches a transmission torque, and when load exceeds the transmission torque, the drum can rotate in a reverse unwinding direction. In a reverse torque operation region, a winding torque is set to a preset Winding Force 2 Reference Rotation Speed relative to a Winding Force 1, and is changed based on a change of rotation speed of the drum. The ratio of winding torque increase/decrease is determined by a torque rising curve. The winding torque switches to Winding Force 3 to perform a constant torque operation when speed of the drum reaches Winding Force 3 Reference Rotation Speed.

Disclosed is a method for guiding aquatic organisms. The method includes disposing a plurality of electrode units at a distance from one another in water; and applying an electrical pulse to at least one electrode unit of the plurality of electrode units to generate an electric field and/or a magnetic field around the at least one electrode unit to guide the aquatic organisms by stimulating the aquatic organisms with the generated electric and/or magnetic fields.

Various implementations described herein are directed to a wearable device used to determine whether motion data and heart rate data correspond to a fishing activity. The wearable device may include a heart rate sensor and a motion sensor. The wearable device may include a computer system with a processor and memory. The memory may have a plurality of executable instructions. When the executable instructions are executed by the processor, the processor may receive motion data from the motion sensor, receive heart rate data from the heart rate sensor, and determine whether the received motion data and heart rate data corresponds to a fishing activity.

Various implementations described herein are directed to a wearable device used to determine whether motion data and heart rate data correspond to a fishing activity. The wearable device may include a heart rate sensor and a motion sensor. The wearable device may include a computer system with a processor and memory. The memory may have a plurality of executable instructions. When the executable instructions are executed by the processor, the processor may receive motion data from the motion sensor, receive heart rate data from the heart rate sensor, and determine whether the received motion data and heart rate data corresponds to a fishing activity.

The present invention relates to a system (100) for transporting a liquid from a reservoir (600) containing the liquid. The system comprises a first and second conduit (400, 500), each with a lower end (402, 502) and an upper end (404, 504), a first pump (200), with an inlet end (201) and an outlet end (202): wherein one of the lower end (402) of the first conduit (400) or the upper end (504) of the second conduit (500) is connected to a second pump (300): wherein a height difference between the first and second pump (200, 300) is within a maximum pumping height of a lower pump of the first and second pump (200, 300). Further, the present invention relates to a method for operating a plurality of pumps in a system (100).

The present invention relates to an underwater harvesting system (1) for harvesting zooplankton or mesoplagic fishes, comprising an underwater vehicle (2) for being lowered into the sea and towed behind a surface vessel (3), comprising a housing (21) provided with an inlet (22) through which zooplankton-containing-fluid may flow; a hose (4) mounted on the underwater vehicle and in fluid communication with the inlet, the hose being adapted to secure and fluidly connect the underwater vehicle to the surface vessel; and pumping means for drawing in a zooplankton-containing-fluid through the inlet in the underwater vehicle and for pumping the zooplankton-containing-fluid through the hose to the surface vessel. The invention further relates to a method for harvesting zooplankton or other marine organisms.

The present invention relates to an underwater harvesting system (1) for harvesting zooplankton or mesoplagic fishes, comprising an underwater vehicle (2) for being lowered into the sea and towed behind a surface vessel (3), comprising a housing (21) provided with an inlet (22) through which zooplankton-containing-fluid may flow; a hose (4) mounted on the underwater vehicle and in fluid communication with the inlet, the hose being adapted to secure and fluidly connect the underwater vehicle to the surface vessel; and pumping means for drawing in a zooplankton-containing-fluid through the inlet in the underwater vehicle and for pumping the zooplankton-containing-fluid through the hose to the surface vessel. The invention further relates to a method for harvesting zooplankton or other marine organisms.

The present disclosure discloses a method of using an unmanned aerial vehicle (UAV) comprising a housing, a processor, a positioning unit, a sonar unit, a launching unit and a fishhook unit in fishing. The method comprises manipulating the UAV to fly to a designated destination determined by the processor according to one of a received wireless communication and a preset program, adjusting the sonar unit to a predetermined height by the positioning unit, determining a coordinate corresponding to a signal detected by the sonar unit as a fishing region when the signal is consistent with a predetermined value, launching bait to the fishing region by the launching unit, releasing a fishhook from the fishhook unit to the fishing region, and manipulating the UAV to hover or return by the processor according to one of a received wireless communication and a preset program.