Navionics+ Chart Card for US Coast and lakes. Includes max-detailed cartography for marine and lakes that is updated daily. Covers 22,000 lakes in the U.S. & Canada with 1' contours inshore and nearshore. Features Nautical Chart, the most accurate navigational data; SonarChart, an exclusive 1' HD bathymetry map; and Community Edits, local content from the community. Daily updates and advanced features are included for one year. Advanced features include SonarChart Live, Advanced Map Options, and Plotter Sync. USB reader provided.