Abstract: A sonar system using frequency bursts. A sonar system for use with a vessel may include a sonar module having a transmitting element configured to generate a transmit signal, where the transmit signal comprises one or more bursts, and where at least one burst comprises a first portion having a first frequency and a second portion having a second frequency different than the first frequency. The sonar system may also include a transducer array in communication with the sonar module, where the transducer array is configured to (i) receive the transmit signal from the transmitting element, (ii) produce one or more sonar beams based on the first frequency and the second frequency, and (iii) receive one or more sonar return signals from an underwater environment.

Abstract: A method for providing a combined linear and circular downscan sonar display may include receiving linear downscan sonar data from a linear downscan transducer, receiving conical downscan sonar data from a circular downscan transducer, and combining the linear downscan sonar data and the conical downscan sonar data to produce combined downscan sonar data. A corresponding computer program product and apparatus are also provided.

Abstract: Sidelobe suppression methods and systems for use in processing radar video streams generated by rotational radar antenna scanners. The sidelobe suppression methods function in parallel with traditional Sensitivity Control (SC) processing by selectively reducing sensitivity where necessary depending on sidelobe suppression schemes that can be either directional, omni-directional (non-directional), or a combination of these.

Abstract: Sidelobe suppression methods and systems for use in processing radar video streams generated by rotational radar antenna scanners. The sidelobe suppression methods function in parallel with traditional Sensitivity Control (SC) processing by selectively reducing sensitivity where necessary depending on sidelobe suppression schemes that can be either directional, omni-directional (non-directional), or a combination of these.

Abstract: A method of processing geo-statistical data includes piloting a watercraft with a monitoring system on a water body, measuring depths of the water body, elevations of the watercraft, and positions of the watercraft using the monitoring system. The method also includes aligning the depths and the elevations with the positions, creating an average elevation using the elevations, and creating a contour map from the depths, positions, and the first average elevation.

Abstract: Methods, apparatuses, and computer program products are herein provided for causing presentation of sonar or radar image data over environment information. A method may include determining a position and a line of sight of a device. The method may further include determining at least one of sonar image data or radar image data associated with the position and the line of sight. The method may further include causing presentation of an image associated with the at least one of sonar image data or radar image data on a display of the device over environment information indicative of an environment currently viewable by a user through the device. Corresponding apparatuses and computer program products are also provided.

Abstract: A method of processing geo-statistical data includes piloting a watercraft with a monitoring system on a water body, taking measurements of a depth of the water body using the monitoring system, and taking measurements of the position of the watercraft using the monitoring system. The method also includes aligning the depth measurements with the position measurements, creating a first contour map with a first set of depth ranges from the depth and position measurements wherein each of the first set of depth ranges are separated by a first interval; and creating a second contour map with a second set of depth ranges from depth and position measurements wherein each of the second set of depth ranges are separated by a second interval that is different from the first interval.

Abstract: A radar beam sharpening system for processing a radar video stream of echo return intensities, sampled in range and azimuth. The system uses a signal processor that is configured to apply beam sharpening to the radar video stream and which selectively varies the level of beam sharpening applied as a function of range and/or a land map generated from the radar video stream so as to generate an output selectively beam sharpened radar video stream.

Abstract: Various implementations described herein are directed to displaying laylines. In one implementation, a method may include receiving marine electronics data at a marine electronics device disposed on a vessel. The method may also include receiving a navigational location. The method may further include calculating one or more laylines based on the navigational location and the marine electronics data. The method may additionally include displaying a vessel marker representing the vessel, a compass scale, and the one or more laylines on a display screen of the marine electronics device, where the vessel marker, the compass scale, and the one or more laylines are integrated on the display screen.

Abstract: Sonar rendering systems and methods are described herein. One example is an apparatus that includes a transducer element, position sensing circuitry, processing circuitry, and a display device. The processing circuitry may be configured to receive raw sonar data and positioning data, convert the raw sonar data into range cell data based at least on amplitudes of the return echoes, make a location-based association between the raw sonar data and the positioning data, plot the range cell data based on respective positions derived from the positioning data and rotate the range cell data based on a direction of movement of the watercraft to generate adjusted range cell data. The processing circuitry may be further configured to convert the adjusted range cell data into sonar image data, and cause the display device to render the sonar image data with a presentation of a geographic map.

Abstract: Systems and apparatuses for interchangeable mounting options for a transducer housing are provided herein. Such a system may provide for easy change of mounting to a watercraft, such as between transom mounting, portable mounting, trolling motor mounting, and thru-hull mounting. A system for interchangeable mounting options of a sonar transducer to a watercraft may comprise at least one transducer, a transducer housing configured to house the at least one transducer, and a mount adapter. The transducer housing may comprise at least one upper engagement surface configured to adjacently engage the mount adapter to facilitate mounting. The at least one upper engagement surface may be configured to releasably engage the mount adapter to allow the mount adapter to be detached and removed without damaging or altering the transducer housing.

Abstract: Devices and systems for noninvasively and nondestructively sensing a signal in an electrical outdoor device, such a fishing transponder, are described. The device can include a first electrical connection to connect to a port on a main unit of an echo-location device, a second electrical connection to connect to a port on a transponder, the second electrical connection being in bi-directional electrical communication with the first connection to send a power signal from the main unit to the transponder and return an echoed signal to the main unit, and a third electrical connection to sense the signals between the first electrical connection and the second electrical connection. Positioning data is also created and stored with the signal data. The positioning data can be used to control acquisition of data. Systems and methods for processing the sensed data are described. Reports can be generated using the data and, in some reports with the positioning data.

Abstract: A method for providing a combined linear and circular downscan sonar display may include receiving linear downscan sonar data from a linear downscan transducer, receiving conical downscan sonar data from a circular downscan transducer, and combining the linear downscan sonar data and the conical downscan sonar data to produce combined downscan sonar data. A corresponding computer program product and apparatus are also provided.

Abstract: A non-transitory computer-readable medium having stored thereon a plurality of computer-executable instructions which, when executed by a computer, cause the computer to: receive a user input at a remote computer communicably coupled to a host computer over a network; and display one or more residue indicators on a screen of the remote computer indicating receipt of the user input by the remote computer. The one or more residue indicators are displayed for a period of time approximately equal to a system latency time. The computer-executable instructions are further configured to cause the computer to receive output data from the host computer based on the user input; and display the output data on the screen of the remote computer.

Abstract: A method of processing geo-statistical data includes preparing a data log, extracting acoustic data and coordinate data from the data log, and aligning the acoustic data and the coordinate data. The method also includes cleaning and aggregating the coordinate data, validating the coordinate data geospatially, and creating an output.

Abstract: Sidelobe suppression methods and systems for use in processing radar video streams generated by rotational radar antenna scanners. The sidelobe suppression methods function in parallel with traditional Sensitivity Control (SC) processing by selectively reducing sensitivity where necessary depending on sidelobe suppression schemes that can be either directional, omni-directional (non-directional), or a combination of these.

Abstract: Methods and sonar system for displaying a nautical chart and for adjusting depth indicators on the chart based on a calculated offset between the actual water level and the standard water level on which the chart is based. The offset is based on sonar soundings compared to depths indicated by the chart. The sonar system's processor automatically adjusts the chart's depth indicators to reflect the offset.

Abstract: Methods, apparatuses, and computer program products are herein provided for causing presentation of sonar or radar image data over environment information. A method may include determining a position and a line of sight of a device. The method may further include determining at least one of sonar image data or radar image data associated with the position and the line of sight. The method may further include causing presentation of an image associated with the at least one of sonar image data or radar image data on a display of the device over environment information indicative of an environment currently viewable by a user through the device. Corresponding apparatuses and computer program products are also provided.

Abstract: A downscan imaging sonar utilizes a linear transducer element to provide improved images of the sea floor and other objects in the water column beneath a vessel. A transducer array may include a plurality of transducer elements and each one of the plurality of transducer elements may include a substantially rectangular shape configured to produce a sonar beam having a beamwidth in a direction parallel to longitudinal length of the transducer elements that is significantly less than a beamwidth of the sonar beam in a direction perpendicular to the longitudinal length of the transducer elements. The plurality of transducer elements may be positioned such that longitudinal lengths of at least two of the plurality of transducer elements are parallel to each other. The plurality of transducer elements may also include at least a first linear transducer element, a second linear transducer element and a third linear transducer element.