THE NAVIONICS SUBSCRIPTION: A one-year subscription to Daily Updates and advanced features is included when you purchase any new Navionics Platinum+ mapping solution. After a year, you can renew at a discounted price CHARTS AND UPDATES:Nautical Chart - Comprehensive charts are derived from multiple official, government and private sources, displayed in a familiar look and feelSonarChart HD Bathymetry - Innovative 1' (0.5 m) bathymetry charts are created by using Navionics proprietary systems that augment existing content with sonar data contributed by the boating communityCommunity Edits - Get useful local knowledge from edits made by users of the Navionics Boating app on your compatible smart device.Daily Updates - Up to 5,000 daily updates to our charts give you the most accurate, most current Navionics data availableInland Content: 42,000+ lakes (varies by coverage area) ADVANCED FEATURES:Dock-to-dock Route Guidance - Start your trip with a suggested pathSonarChart Live Mapping Feature - Watch new HD depth maps develop in real time as your boat moves through the waterAdvanced Map Options - Customize your view to focus on the details that matter mostPlotter Sync - Transfer routes and markers, update chart layers and more - between your compatible chartplotter and the Boating app OVERLAYS:Relief Shading - Get an easy-to-interpret, clearer view of bottom structure. Check coverageSatellite Imagery with SonarChart Shading Overlay - Experience an enhanced awareness above and below the waterline. Check coverageSonar Imagery - View bottom hardness clearly and in contrasting color PLATINUM+ ADDITIONAL VIEWING OPTIONS:3D View - Adjust the perspective of your chart view to highlight key features and enhance awarenessAerial Photos - Get a better sense of your surroundingsVisit Navionics website for full feature list, coverage details and compatibility of Platinum+ content and features with your GPS chartplotter.**NOT COMPATIBLE with GARMIN GPS chartplotters**