Yes. In both the Android and iPhone apps, you can select a region to download so that if you’re boating beyond cell coverage, you can have the charts with you. Attached are some screenshots below that show the process. Note: right now, there is a limit to the amount of chart data you can download for each download (10,000 chart tiles, or 20MB roughly for you techies) but you can download different regions as often as you like. We will be upping the download data limits in the coming months.