Navionics+ is a powerful electronic chart solution providing more regional marine and lakes content than any other product on the market! Get detailed Nautical Chart, SonarChart 1' HD bathymetry map, and Community Edits, plus daily updates for one year. Includes more than 7,500 lakes in IA, MI, MN, ND, SD, and WI, plus all of Lake of the Woods, Rainy Lake, and US waters of the region's Great Lakes. Nautical Chart and Sonar Chart are preloaded. Simply plug your card into your PC/Mac to download the most updated charts and Community Edits anywhere within the entire region. 16 GB card and USB reader included.