Garmin Navionics+ NSUS012R Canada, East Great Lakes [010-C1484-20]Navionics+ NSUS012R Canada, East & Great Lakes Featuring vibrant colors, a streamlined interface, and combined coastal inland content with a popular Navionics style color palette, Garmin Navionics+ cartography makes it easy to plot courses with the worlds No. 1 name in marine mapping. microSD SD format Navigate with the best offshore and inland lake coverage for a Garmin chartplotter Customize the view with various chart layers and overlay