Navionics Updates - Caribbean & South America - microSD/SD All the contents of Navionics+ at half the price. Just use an old card to activate it. Navionics offers the best-selling boating maps in the world. Get the most current charts - every day - with daily updates for one year. Includes Nautical Charts, SonarChartTM 1 foot/0.5 mHD bathymetry map that reflects ever changing conditions, and Community Edits, valuable local information added by millions of Navionics Boating app users.