Various implementations described herein are directed to a device configured to use motion sensing for controlling a display. The device may include a motion sensing module configured to track orientation of a user on a watercraft and determine a direction of a cast executed by the user based on the tracked orientation of the user. The device may include a display module configured to display one or more sonar images based on the determined direction of the cast executed by the user.

Various techniques are described that relate to the manner in which marine devices may generate and display a water depth contour map while navigating a body of water. The contour map includes contour lines associated with determined contour line data that indicate geolocations of underwater terrain existing at depths of the body of water specified by the contour lines. A boundary enclosing a region of interest for the body of water may be determined and the contour map may include contour lines determined using the determined contour line data within the region of interest. The boundary may correspond to a natural shoreline along the perimeter of a body of water or a portion of the body of the water. The boundary corresponding to a shoreline may be automatically identified based on a stored map by identifying geographic locations along the perimeter of the body of water.

Various implementations described herein are directed to a transducer array. The transducer array may include a first receiver having a first aperture width. The transducer array may include a second receiver having a second aperture width that is substantially equal to the first aperture width. The transducer array may also include a transceiver having a third aperture width that is larger than the first aperture width and the second aperture width.

A system is provided for overlaying representation(s) of a location of interest on an image of an environment around a watercraft. The system includes an electronic device having a display, at least one processor, a camera, and a memory having software instructions stored thereon. When executed by the processor(s), the software instructions cause the processor(s) to receive location and orientation information; cause, based on camera data received from the camera, presentation of the image of the environment; determine a field of view for the camera that includes the environment; identify a location of interest or a representation for the location of interest corresponding to the field of view; cause the representation of the location of interest to be overlayed onto the image to generate an augmented reality image; receive an input requesting further information for the location of interest; and cause presentation of additional information about the location of interest.

Various implementations described herein are directed to a device configured to use motion sensing for controlling a display. The device may include a motion sensing module configured to track orientation of a user on a watercraft and determine a direction of a cast executed by the user based on the tracked orientation of the user. The device may include a display module configured to display one or more sonar images based on the determined direction of the cast executed by the user.

Various implementations described herein are directed to 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 perform various actions. The actions may include receiving sonar data from a sonar transducer, identifying a subset of the received sonar data to be displayed on the screen, and identifying a deepest level from the subset. The actions may further include determining a depth range that includes the deepest level, and rendering an image of the subset based on the depth range.

An obstacle advisory system for a vehicle and a method for operating the same are provided. The system, for example, may include, but is not limited to a display, and a processor communicatively coupled to the display, the processor configured to receive sensor data from at least one sensor configured to sense obstacles around a vehicle, generate obstacle display data based upon the sensor data, the obstacle display data comprising display data for each of a plurality of sectors and for each of a plurality of blocks within each of the plurality of sectors forming a grid surrounding the vehicle, and display the generated obstacle display data on the display.

Sonar devices for detecting underwater objects are provided whereby a set of angled ultrasound transducers are employed to sense ultrasound signals from a plurality of different spatial regions. The angled ultrasound transducers may include a first pair of side-viewing ultrasound transducers and a second pair of ultrasound transducers configured for interrogating forward and reverse directions. The ultrasound signals from the set of angled ultrasound transducers may be processed to identify the presence of underwater objects in each spatial region, and the resulting identified underwater objects may be displayed, on a per-region basis, on a user interface. The ultrasound signals may additionally or alternatively be processed to generate a topographical model of the bed surface, and to generate a topographical surface image based on the three-dimensional topographical model. The topographical surface image may be displayed as a fly-over animation.

Various implementations directed to a depth display using sonar data are provided. In one implementation, a marine electronics device may include a sonar signal processor and a memory having a plurality of program instructions which, when executed by the sonar signal processor, cause the processor to receive sonar data from a transducer array disposed on a vessel, where the sonar data corresponds to a marine environment proximate to the vessel. The memory may also have program instructions which, when executed by the sonar signal processor, cause the processor to generate point cloud data based on the received sonar data. The memory may further have program instructions which, when executed by the sonar signal processor, cause the processor to generate a depth display based on the point cloud data, where the depth display includes a depth line representing an underwater floor of the marine environment.

Techniques are disclosed for systems and methods to provide accurate and reliable compact sonar systems for mobile structures. A sonar system includes multiple sensor channels, each comprising a sonar transmitter and a sonar receiver, and a logic device configured to provide control signals and receive sensor signals from the sensor channels. The logic device is configured to provide transmission signals to sonar transducer assemblies, where signal patterns of the transmission signals are differentiated based at least in part on frequency content. Acoustic returns are processed using the signal patterns to reduce inter-channel pickup between the sensor channels. Resulting sonar data and/or imagery may be displayed to a user and/or used to adjust a steering actuator, a propulsion system thrust, and/or other operational systems of the mobile structure.