Garmin Navionics U.S. Lakes, Rivers and Coastal Marine Charts - Your purchase includes charts, maps and any content downloaded during the one-year subscription period. An active subscription is required to continue accessing new content such as daily updates after the included one-year ends. microSD/SD and One-year Subscription; Navigate with our best offshore and inland lake coverage for your Garmin chartplotter.; See it your way. Customize your view with various chart layers and overlay combinations.; With your included one-year subscription, access daily updates via the ActiveCaptain smart-device app.; Auto Guidance+ technology lets you navigate with suggested dock-to-dock routings.; Select up to 10 color-shaded target depth ranges to scope out the best fishing spots;