LakeMaster Digital GPS Maps (VX Technology) - Great Lakes

VX Technology: Provides exceptional map performance and customizable color palettes. Chart Presets: Simple and easy to change between your custom view settings. Depth Highlight: Highlight a selected depth range so you can target productive water and stay where the fish are. Shallow Water Highlight: Easy-to-see red shading highlights shallow water areas on an adjustable range from 0 to 60 feet. Water Level Offset: Synchronize the depth contours and shorelines of your LakeMaster charts with the actual water levels of lakes, reservoirs, and rivers. One-Boat Network. Compatible with Humminbird HELIX G3/G3N and newer, all SOLIX units, and all APEX units. 1-Year Cartography Warranty. Great Lakes - MI, IN, OH.