A system comprising a radar subsystem including a radar transmitter and a radar receiver, and an encoder subsystem including a computer connected to a transmitter and two antennas. The computer is configured to encode and transmit a custom payload AIS Type 8 message. A second computer connected to a receiver and antenna receives the message. The custom payload AIS Type 8 message contains target longitude, latitude fields, range, and bearing fields.

A method for transmitting and receiving the radar track of a target ship including: receiving the radar signal at the own ship; encoding the target ship longitude, latitude, speed, and course into a custom payload AIS Type 8 message; transmitting the custom message to a receiver ship; decoding and displaying the target ship longitude, latitude, course, and speed at the receiver ship.

A trolling device for a boat includes a trolling motor and a control mechanism. The control mechanism controls at least one of the speed and the direction of the trolling motor. The control mechanism is configured to receive control instructions from an electronic GPS mapping computer to cause the trolling motor to establish an anchor point near a dock to enable entry to the fishing boat or exit from the fishing boat.

A trolling device for a boat includes a trolling motor and a control mechanism. The control mechanism controls at least one of the speed and the direction of the trolling motor. The control mechanism is configured to receive control instructions from an electronic GPS mapping computer to cause the trolling motor to establish an anchor point near a dock to enable entry to the fishing boat or exit from the fishing boat.

Techniques are disclosed for systems and methods to provide sailing information to users of a mobile structure. A sailing user interface system includes a logic device configured to communicate with a compass or orientation sensor, a wind sensor, and/or a speed sensor. Sensor signals provided by the various sensors are used to determine a heading and a wind direction for the mobile structure. The wind direction and heading may be used to generate a steering guide display view. The steering guide graphically indicates the heading of the mobile structure relative to various optimum velocity made good (VMG) headings associated with the mobile structure, its heading, the wind direction, and/or a performance contour for the mobile structure. The steering guide may be displayed to a user to refine manual operation of the mobile structure, and the information rendered in the steering guide may be used to autopilot the mobile structure.

A lighthouse lantern comprising a power supply and a phosphor-containing emitter is disclosed. The lighthouse lantern includes a power supply; a laser diode configured for receiving power from the power supply and irradiating laser in one direction; a phosphor-containing emitter positioned on a traveling line of the laser, wherein the emitter is configured for receiving the laser and emitting light; and a pair of reflective structures disposed symmetrically with respect to the phosphor-containing emitter, wherein each reflective structure has a reflective surface inclined in a direction away from the phosphor-containing emitter, wherein the reflective surfaces of the reflective structures are symmetrical with each other with respect to the phosphor-containing emitter. In accordance with the present disclosure, the lighthouse lantern may generate high output with low input power and thus has improved power efficiency, may suppress frequent failures near sea or seawater, and may reduce production costs.

A lighthouse lantern comprising a power supply and a phosphor-containing emitter is disclosed. The lighthouse lantern includes a power supply; a laser diode configured for receiving power from the power supply and irradiating laser in one direction; a phosphor-containing emitter positioned on a traveling line of the laser, wherein the emitter is configured for receiving the laser and emitting light; and a pair of reflective structures disposed symmetrically with respect to the phosphor-containing emitter, wherein each reflective structure has a reflective surface inclined in a direction away from the phosphor-containing emitter, wherein the reflective surfaces of the reflective structures are symmetrical with each other with respect to the phosphor-containing emitter. In accordance with the present disclosure, the lighthouse lantern may generate high output with low input power and thus has improved power efficiency, may suppress frequent failures near sea or seawater, and may reduce production costs.

A trolling device for a boat includes a trolling motor and a control mechanism. The control mechanism controls at least one of the speed and the direction of the trolling motor. The control mechanism is configured to receive control instructions from an electronic GPS mapping computer to cause the trolling motor to establish an anchor point near a dock to enable entry to the fishing boat or exit from the fishing boat.

A trolling device for a boat includes a trolling motor and a control mechanism. The control mechanism controls at least one of the speed and the direction of the trolling motor. The control mechanism is configured to receive control instructions from an electronic GPS mapping computer to cause the trolling motor to establish an anchor point near a dock to enable entry to the fishing boat or exit from the fishing boat.

Systems and methods for generating a phase-resolved ocean wave forecast with ensemble based data assimilation are disclosed. An example method includes receiving radar data corresponding to an ocean surface, and determining a surface elevation, a surface potential, and an ocean current field of a portion of the ocean surface. The example method also includes generating an ensemble of perturbed ocean surface data, and applying a phase-resolved nonlinear wave model to the ensemble of perturbed ocean surface data to generate forecast ocean surface data. The example method also includes receiving a subsequent set of radar data corresponding to the ocean surface, and applying an ensemble Kalman filter to determine, a subsequent surface elevation, a subsequent surface potential, and a subsequent ocean current field. The example method also includes generating a phase-resolved ocean wave forecast based on iteratively analyzing the subsequent ocean field until a tolerance factor satisfies a tolerance threshold.

Systems and methods for generating a phase-resolved ocean wave forecast with ensemble based data assimilation are disclosed. An example method includes receiving radar data corresponding to an ocean surface, and determining a surface elevation, a surface potential, and an ocean current field of a portion of the ocean surface. The example method also includes generating an ensemble of perturbed ocean surface data, and applying a phase-resolved nonlinear wave model to the ensemble of perturbed ocean surface data to generate forecast ocean surface data. The example method also includes receiving a subsequent set of radar data corresponding to the ocean surface, and applying an ensemble Kalman filter to determine, a subsequent surface elevation, a subsequent surface potential, and a subsequent ocean current field. The example method also includes generating a phase-resolved ocean wave forecast based on iteratively analyzing the subsequent ocean field until a tolerance factor satisfies a tolerance threshold.