Navionics+ Global Regions Marine and Lake Charts on SD/MSD Max detailed charts for cruising, fishing and sailing. Includes Nautical Chart, a robust chart resource trusted by boaters worldwide SonarChartTM 1 foot/0.5 m HD bathymetry map that reflects ever-changing conditions, and Community Edits, valuable local information added by millions of Navionics Boating app users. Get the most current charts every day with daily updates for one year.