Unparalleled Coastal Chart Coverage Provides industry-leading coverage, clarity and detail with updated coastal charts that feature integrated Garmin and Navionics data Auto Guidance1 technology calculates a route using your desired depth and overhead clearance and provides a suggested path to follow Includes Depth Range Shading for up to 10 depth ranges, enabling you to view your target depth at a glance Up to 1-foot contours provide a more accurate depiction of the bottom structure for improved fishing charts and navigation in swamps, canals and marinas Auto Guidance technology The Auto Guidance feature calculates a suggested route using your desired depth and overhead clearance. Depth Range Shading This feature displays high-resolution Depth Range Shading for up to 10 depth ranges, so you can view your designated target depth. Detailed Contours BlueChart g3 charts feature 1-foot contours that provide a more accurate depiction of bottom structure for improved fishing charts and enhanced detail in swamps, canals and port plans. Shallow Water Shading To aid in navigation, Shallow Water Shading allows map shading at a user-defined depth to give a clear picture of shallow waters to avoid. Compatible with ECHOMAP™ Plus series chartplotters.