All-in-one max detailed cartography for marine and lakes makes Navionics+ the perfect choice for cruising, fishing and sailing. Get the most accurate navigational data for your GPS plotter, an exclusive 1 ft HD bathymetry map which is enhanced by boaters like you, and unique local content shared by Navionics app users. We make thousands of edits every day, so you can always have the most current charts. Daily updates and advanced features are included for one year. Includes more than 21,000 lakes.