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.