Humminbird LakeMaster Premium - Great Lakes V1 - Humminbird LakeMaster Maps deliver unrivaled detail, accuracy and innovative, one-of-a-kind features you need to eliminate unproductive water and find the best fishing spots faster. Compatible With HELIX G3/G3N and newer, all SOLIX units, all APEX units and all XPLORE units 2D Shaded Relief - Make bottom detail and depth changes easy to spot so you can quickly identify fish holding areas. Aerial Imagery - Navigate more confidently and find new fishing spots with the help of aerial imagery. VX Technology - Provides exceptional map performance and customizable color palettes. SmartStrike Highlights areas of the lake map where fish are most likely biting. *Select HD Lakes Only Chart Presets - Simple and easy to change between your own 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 - Connect your Humminbird LakeMaster chart and Minn Kota trolling motor, allowing your boat to automatically follow a depth contour line. Software Requirements - HELIX 9-15 (G3N and newer) & All SOLIX require v1.031 Basemap. HELIX 5/7/8 (G3/G3N and newer) require v2.010 Basemap.