Abstract: A method of making and a computer readable media having data readable by a fish finder are provided. The data includes a topographical fishing map usable by the fish finder to display bathymetric information regarding a body of water, and a number of water current flow simulations. Any of the number of simulations is selectable via the user input and usable by the fish finder to display water current flow as a layer on the bathymetric information regarding a body of water. Freshwater currents or saltwater tides may be provided in certain embodiments. The method includes inputting the bathymetric information from the topographical fishing map and current flow conditions to the processor, processing a hydrodynamic or tidal modeling program and storing the water current flow simulation as a user selectable layer on the media on which the topographical fishing map is stored.

Abstract: A sonar imaging system, that includes a control head with a user interface and a display unit for displaying a sonar-generated image, is provided. A sonar transducer assembly is coupled to the control head and configured to transmit sonar data to the control head. The sonar data is used to generate the sonar-generated image. The sonar transducer assembly includes a first side scan acoustic sonar element that transmits a sonar beam. The sonar transducer assembly further includes a plurality of sonar beam receiving elements. Each receiving element is arranged to receive a portion of the return beam from the first side scan acoustic sonar element. Each of the plurality of sonar beam receiving elements is configured to identify both a depth and a lateral distance of an underwater object relative to the position of the sonar transducer assembly.