The location of lost or entangled fishing gear, known as derelict gear, is detected. The motion or change of position of a buoy attached to fishing gear is determined via sensors mounted on the buoy and compared to typical buoy motion. If the buoy has moved beyond a threshold value from its original location, an alert is sent to the fisherman. The available sensor data will be used to determine the likelihood of loss or entanglement. This alert facilitates recovery of lost or entangled gear by identifying where immediate retrieval efforts should be focused. The number of traps lost to the ocean that otherwise would continue to trap or entangle marine life may be reduced.

The location of lost or entangled fishing gear, known as derelict gear, is detected. The motion or change of position of a buoy attached to fishing gear is determined via sensors mounted on the buoy and compared to typical buoy motion. If the buoy has moved beyond a threshold value from its original location, an alert is sent to the fisherman. The available sensor data will be used to determine the likelihood of loss or entanglement. This alert facilitates recovery of lost or entangled gear by identifying where immediate retrieval efforts should be focused. The number of traps lost to the ocean that otherwise would continue to trap or entangle marine life may be reduced.

A net retaining system includes a base component and a head component. The base component includes a first surface, an opposite second surface, a retention member provided to the first surface and a cradle projecting from the first surface and configured to grip a net rim near a net handle. The head component includes, a first engagement member facing a first direction, a second engagement member facing a second, opposite direction and a column having first and second ends. The first and second engagement members are configured for selective coupling with the retention member of the base component. The column separates the first and second engagement members and is configured to extend through the net handle so as to resist rotation relative to the net handle.

A net retaining system includes a base component and a head component. The base component includes a first surface, an opposite second surface, a retention member provided to the first surface and a cradle projecting from the first surface and configured to grip a net rim near a net handle. The head component includes, a first engagement member facing a first direction, a second engagement member facing a second, opposite direction and a column having first and second ends. The first and second engagement members are configured for selective coupling with the retention member of the base component. The column separates the first and second engagement members and is configured to extend through the net handle so as to resist rotation relative to the net handle.

A net retaining system includes a base component and a head component. The base component includes a first surface, an opposite second surface, a retention member provided to the first surface and a cradle projecting from the first surface and configured to grip a net rim near a net handle. The head component includes, a first engagement member facing a first direction, a second engagement member facing a second, opposite direction and a column having first and second ends. The first and second engagement members are configured for selective coupling with the retention member of the base component. The column separates the first and second engagement members and is configured to extend through the net handle so as to resist rotation relative to the net handle.

A net retaining system includes a base component and a head component. The base component includes a first surface, an opposite second surface, a retention member provided to the first surface and a cradle projecting from the first surface and configured to grip a net rim near a net handle. The head component includes, a first engagement member facing a first direction, a second engagement member facing a second, opposite direction and a column having first and second ends. The first and second engagement members are configured for selective coupling with the retention member of the base component. The column separates the first and second engagement members and is configured to extend through the net handle so as to resist rotation relative to the net handle.

A configuration for water purification undergoes the water supply step of taking in treatment water through a water suction port and pressure-feeding the treatment water, the air supply step of taking in air through an air suction port and supplying the air, the oxygen amount increasing step of pressurizing the air supplied at the air supply step to increase the total amount of oxygen, the ionization step of ionizing the pressurized air subjected to the oxygen amount increasing step, the mixing step of obtaining gas-liquid mixing fluid subjected to first fine air bubble formation by spraying the air into the flow of treatment water, and the accelerated spraying step of performing second fine air bubble formation by accelerating a flow velocity by a narrowed-diameter portion provided at a spray nozzle when the gas-liquid mixing fluid obtained through the mixing step is sprayed into the treatment water.

A configuration for water purification undergoes the water supply step of taking in treatment water through a water suction port and pressure-feeding the treatment water, the air supply step of taking in air through an air suction port and supplying the air, the oxygen amount increasing step of pressurizing the air supplied at the air supply step to increase the total amount of oxygen, the ionization step of ionizing the pressurized air subjected to the oxygen amount increasing step, the mixing step of obtaining gas-liquid mixing fluid subjected to first fine air bubble formation by spraying the air into the flow of treatment water, and the accelerated spraying step of performing second fine air bubble formation by accelerating a flow velocity by a narrowed-diameter portion provided at a spray nozzle when the gas-liquid mixing fluid obtained through the mixing step is sprayed into the treatment water.

The present invention is a hoop net comprised of netting mounted to two or more semicircular tubular rods, forming a ring that maintains its shape and structural integrity. The two semicircular tubular rods are fashioned to connect seamlessly by a fastening means that allows the entire assembly to function as intended. The hoop net assembly includes four stabilizing cords positioned equidistant from each other along the ring, which cords converge at the center of the hoop net assembly and are connected to each other by a fastening means, then further connected to a single draw cord. The draw cord is used to cast the assembled hoop net into water to a desired depth and pulled back into the boat with live bait. Once the hoop net assembly has been used, the metal rods are easily disconnected to facilitate folding the hoop net in half for easy storage and portability.

The present invention is a hoop net comprised of netting mounted to two or more semicircular tubular rods, forming a ring that maintains its shape and structural integrity. The two semicircular tubular rods are fashioned to connect seamlessly by a fastening means that allows the entire assembly to function as intended. The hoop net assembly includes four stabilizing cords positioned equidistant from each other along the ring, which cords converge at the center of the hoop net assembly and are connected to each other by a fastening means, then further connected to a single draw cord. The draw cord is used to cast the assembled hoop net into water to a desired depth and pulled back into the boat with live bait. Once the hoop net assembly has been used, the metal rods are easily disconnected to facilitate folding the hoop net in half for easy storage and portability.