Navionics Platinum charts include all the content of Navionics cartography, with integrated offshore and inland mapping, 42,000 lakes and additional viewing options for relief shading, satellite imagery with SonarChart shading overlay, 3D perspective view, aerial photos, and more.. Features Dock-to-dock Route Guidance- Start your trip with a suggested path; SonarChart Live Mapping Feature- Watch new HD depth maps develop in real-time as your boat moves through the water; Advanced Map Options- Customize your view to focus on the details that matter most; Plotter Sync- Transfer routes and markers, update chart layers, and more-between your compatible chartplotter and the Boating app; Charts & Updates: Nautical Chart- Comprehensive charts are derived from multiple officials, government, and private sources, displayed in a familiar look and feel; SonarChart HD Bathymetry- Innovative 1' (05 m) bathymetry charts are created by using Navionics proprietary systems that augment existing content with sonar data contributed by the boating community; Community Edits- Get useful local knowledge from edits made by users of the Navionics Boating app on your compatible smart device; Overlays: Relief Shading- Get an easy-to-interpret, clearer view of bottom structure; Satellite Imagery with SonarChart Shading Overlay- Experience an enhanced awareness above and below the waterline; Sonar 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 awareness; Aerial Photos- Get a better sense of your surroundings; Coverage Areas: Choose from large coverage areas (Large) to more localized chart cuts (Regular); Compatibility: Check the compatibility of Platinum content and features with your GPS chartplotter; 1 Subscription is required; 2 Dock-to-dock Route Guidance is for planning purposes only and does not replace safe navigation operations; 3 Subscription not required for SonarChart Live mapping feature on some chartplotter models; requires latest chartplotter firmware release; Specifications Weight: 0.1 lbs; .