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, 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.

Abstract: Described herein are implementations of various technologies for an apparatus and method for providing navigation data. In one implementation, a non-transitory computer-readable medium having stored thereon a plurality of computer-executable instructions. When the plurality of computer-executable instructions are executed by a computer, the plurality of executable instructions causes the computer to receive a user selection of a plurality of points of navigation data and receive a user selection of a geographical region. The computer can select at least a portion of the plurality of the points of the navigation data that are in the geographical region.

Abstract: An apparatus and method for displaying marine electronic data. In one implementation, a non-transitory computer-readable medium has stored thereon a plurality of computer-executable instructions. When the plurality of computer-executable instructions are executed by a computer, the plurality of computer-executable instructions cause the computer to perform various actions. The actions may include receiving a user request for the computer to display two or more windows of chart data. The computer can then create the two or more windows on a screen of the computer. A first one of the two or more windows can display the chart data from a first source. A second one of the two or more windows can display the chart data from a second source.

Abstract: A sonar module using multiple receiving elements. A sonar module for use with a vessel may include a housing positioned on the vessel. The sonar module may also include one or more transmitting elements positioned inside the housing and configured to send at least one transmit signal to a transducer array. The sonar module may further include a first receiving element, a second receiving element, a third receiving element, and a fourth receiving element positioned inside the housing, where the first receiving element is configured to receive a first sonar data from the transducer array, the second receiving element is configured to receive a second sonar data from the transducer array, the third receiving element is configured to receive a third sonar data from the transducer array, and the fourth receiving element is configured to receive a fourth sonar data from the transducer array.

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: Described herein are implementations of various technologies for a method and apparatus for displaying marine electronic data. In one implementation, a non-transitory computer-readable medium having stored thereon computer-executable instructions which, when executed by a computer, causes the computer to perform various actions. In one implementation, the actions may include displaying a plurality of possible marine electronic data types to be displayed. A selection to display one of the plurality of possible marine electronic data types in the plurality of possible marine electronic data types may be received. A plurality of possible combinations of marine electronic data types to be displayed with the one of the plurality of possible marine electronic data types may be displayed. A selection from the plurality of possible combinations may then be received. A combination of marine electronic data that correspond to the selection from the plurality of possible combinations may be displayed.

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.

Abstract: An apparatus for synchronizing cursor events may include a processor. The processor may be configured to receive an indication of a cursor event of a cursor presented within and associated with a sourcing window of a user interface that also includes a sourced window, wherein the cursor of the sourcing window indicates a geographical location within the geographical area presented by the sourcing window. Additionally, the processor may be configured to communicate information reflecting the cursor event to the sourced window. The processor may further be configured to subject the cursor of the sourced window to the cursor event reflected by the information to thereby synchronize a cursor event of the cursor of the sourced window with the cursor event of the cursor of the sourcing window, wherein the cursor of the sourced window indicates the geographical location indicated by the cursor of the sourcing window.

Abstract: An antenna assembly is provided that may include an antenna element having first and second opposed sides. The antenna element may be configured to transmit or receive signals of a desired wavelength. The antenna assembly may also include a first conductive surface disposed proximate the first side of the antenna element and lying in a plane substantially perpendicular to the antenna element, and a second conductive surface disposed proximate the second side of the antenna element and lying in a plane substantially perpendicular to the first antenna element. The second conductive surface may be substantially parallel to, and spaced apart from, the plane in which the first conductive surface lies. Collectively the first and second conductive surfaces may be configured to excite wave propagation modes of a higher order than a fundamental propagation mode for reception or transmission of signals of the desired wavelength by the antenna element.

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: A sonar transducer assembly for mounting to a surface watercraft includes a rectangular first transducer configured to produce a first beam defining a fan-shape and extending generally in a first plane. The assembly further includes a rectangular second transducer configured to produce a second beam defining a fan-shape and extending generally in a second plane. The first transducer and the second transducer are oriented such that the respective first and second beams insonify different first and second areas each extending laterally with respect to a running direction of the surface watercraft, and such that the first beam is outside of the second plane of the second beam, the resulting planar separation of the first and second planes of the first and second beams reducing interference between the first and second transducers.