The present invention includes systems and methods for a continuous-wave (CW) radar system for detecting, geolocating, identifying, discriminating between, and mapping ferrous and non-ferrous metals in brackish and saltwater environments. The CW radar system generates multiple extremely low frequency (ELF) electromagnetic waves simultaneously and uses said waves to detect, locate, and classify objects of interest. These objects include all types of ferrous and non-ferrous metals, as well as changing material boundary layers (e.g., soil to water, sand to mud, rock to organic materials, water to air, etc.). The CW radar system is operable to detect objects of interest in near real time.

The present invention includes systems and methods for a continuous-wave (CW) radar system for detecting, geolocating, identifying, discriminating between, and mapping ferrous and non-ferrous metals in brackish and saltwater environments. The CW radar system generates multiple extremely low frequency (ELF) electromagnetic waves simultaneously and uses said waves to detect, locate, and classify objects of interest. These objects include all types of ferrous and non-ferrous metals, as well as changing material boundary layers (e.g., soil to water, sand to mud, rock to organic materials, water to air, etc.). The CW radar system is operable to detect objects of interest in near real time.

A boat launching device preferably includes an elastic line, a first elastic line loop and a second elastic line loop. The elastic line includes a first loop end and a second loop end. The first and second loop ends must be capable of being inserted through a rear line tie-off opening. The first elastic line loop is slidably retained on the elastic line with a first clip. The first loop clip is looped around the first elastic line loop and the elastic line. The second elastic line loop is secured to the first loop end with a second clip. The second loop clip is looped through the first loop end and the second elastic line loop. The first loop end is inserted through a rear line tie-off, the first loop clip and a front line tie-off. The second loop end is secured to the front line tie-off.

A boat launching device preferably includes an elastic line, a first elastic line loop and a second elastic line loop. The elastic line includes a first loop end and a second loop end. The first and second loop ends must be capable of being inserted through a rear line tie-off opening. The first elastic line loop is slidably retained on the elastic line with a first clip. The first loop clip is looped around the first elastic line loop and the elastic line. The second elastic line loop is secured to the first loop end with a second clip. The second loop clip is looped through the first loop end and the second elastic line loop. The first loop end is inserted through a rear line tie-off, the first loop clip and a front line tie-off. The second loop end is secured to the front line tie-off.

A line hauler on a fish tender vessel is mounted to a port or starboard quarter location of a deck of the vessel. A loop of floating line is wrapped around the line hauler, extends toward the bow of the vessel to a pulley mounted on a respective port or starboard side, then extends down to the sea, then extends on the surface of the sea adjacent the respective port or starboard side to at least the location where the line hauler is mounted to the deck, and then extends from the surface of the sea back to the line hauler. The loop of line moves in a circle when the line hauler pulls on the line. Lead lines are connected to the line. Fishing vessels attached to the lead lines are pulled alongside the respective port or starboard side of the vessel when the line hauler pulls the line.

The present invention includes systems and methods for a continuous-wave (CW) radar system for detecting, geolocating, identifying, discriminating between, and mapping ferrous and non-ferrous metals in brackish and saltwater environments. The radar system (e.g., the CW radar system) generates multiple extremely low frequency (ELF) electromagnetic waves simultaneously and uses said waves to detect, locate, and classify objects of interest. These objects include all types of ferrous and non-ferrous metals, as well as changing material boundary layers (e.g., soil to water, sand to mud, rock to organic materials, water to air, etc.). The radar system (e.g., the CW radar system) is operable to detect objects of interest in near real time.

The present invention includes systems and methods for a continuous-wave (CW) radar system for detecting, geolocating, identifying, discriminating between, and mapping ferrous and non-ferrous metals in brackish and saltwater environments. The radar system (e.g., the CW radar system) generates multiple extremely low frequency (ELF) electromagnetic waves simultaneously and uses said waves to detect, locate, and classify objects of interest. These objects include all types of ferrous and non-ferrous metals, as well as changing material boundary layers (e.g., soil to water, sand to mud, rock to organic materials, water to air, etc.). The radar system (e.g., the CW radar system) is operable to detect objects of interest in near real time.

A system, method, or apparatus for towing that allows for illumination of a tow rope and/or other components of a towing system or apparatus. The illumination can be achieved through the use of light sources that are coupled to a power source. A tow rope having a length, and a portion of that length can have a strip comprising at least one light source. The strip is of a length that is less than the length of rope and coupled to a control system allows for coupling to the at least one light source. A set of protective layers can surround the strip, engaging the strip with the length of rope, and to prevent the strip from breaking when flexed with the rope. In some examples, the rope can have a first end having a loop, and second end coupled with a handle.

A system, method, or apparatus for towing that allows for illumination of a tow rope and/or other components of a towing system or apparatus. The illumination can be achieved through the use of light sources that are coupled to a power source. A tow rope having a length, and a portion of that length can have a strip comprising at least one light source. The strip is of a length that is less than the length of rope and coupled to a control system allows for coupling to the at least one light source. A set of protective layers can surround the strip, engaging the strip with the length of rope, and to prevent the strip from breaking when flexed with the rope. In some examples, the rope can have a first end having a loop, and second end coupled with a handle.

A water surface and underwater dual-purpose automatic positioning and tracking system and method, which belongs to the field of marine environment observation technologies. The positioning and tracking system includes: a rope winding and unwinding structure, arranged on a main hull structure; where the rope winding and unwinding structure includes a rope roller and a winding and unwinding rope wound around the rope roller; an auxiliary positioning remote control ship, located outside a main body of the main hull structure, where the auxiliary positioning remote control ship is in transmission and fixed connection with the winding and unwinding rope away from the rope roller; communication control units, arranged on the main hull structure and the auxiliary positioning remote control ship; and an automatic positioning tracker unit, arranged on the hull structure, where the automatic positioning tracker unit is in remote communication connection with the communication control units.