Premier Coastal Charts. Industry-leading coverage, clarity and detail with updated coastal charts that feature integrated Garmin and Navionics® content Auto Guidance¹ technology quickly calculates a suggested route by using your desired depth and overhead clearance Includes Depth Range Shading for up to 10 depth ranges, enabling you to view your target depth at a glance Up to 1’ contours provide a more accurate depiction of the bottom structure for improved fishing charts To give a clear picture of shallow waters to avoid, the Shallow Water Shading allows for shading at a user-defined depth