Navionics Update – Micro SD. Do you already own a Navionics chart, but you think it may be outdated? Buy a Navionics Update chip and activate with your old chart to get updates and even expand your navionics coverage with flexible chart selection online! Get detailed 2D chart content for marine areas and lakes, plus receive a 12 month subscription to FRESHEST DATA which includes: free daily chart updates, Community Edits, SonarCharts, and more! Choose your coverage area from around the globe and download the charts you want! Plug your chip into your PC/Mac and download from Navionics.com. You choose data from GOLD and HOTMAPS Premium charts. Great for boaters and fishermen who need data from more than one chart.Simply plug your chip into your PC/Mac and download the freshest data from navionics.com