Our Premium Chart Offering Derived from official charts and private sources to provide navigational aids, spot soundings, depth contours, tides and currents, and detailed harbors and marinas Garmin Auto Guidance technology shows a suggested route to a destination¹ Depth Range Shading for up to 10 depth ranges enables 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 Shallow Water Shading feature allows for depth shading at a user-defined level to aid in navigation Unique 3D views like MarinerEye and FishEye provide additional perspective both above and below the water line High-resolution satellite imagery of ports, marinas, bridges and navigational landmarks for superior situational awareness Worldwide coverage available Keep your charts up to date with our industry-leading New Chart Guarantee and discount card update program