I have
OpenCPN working on Asus Tablet and on my Samsung S3
phone. First I suggest that you should check that you have your onboard gps up and running. You do this outside of
OpenCPN through the devices settings. I downloaded an app for free called GPS Data this app will show visible satellites and Lat/Lon. Having established you have GPS then load openCPN and go through settings (Crescent Spanner Icon) and set the
charts by adding the directory where your chart are stored, mine are kept on the
storage chip. Scan the charts through the same
screen. Now go to "Connections" also from settings and see if Data Connections show ON as selected, type as GPS, Prio as 1, I/O as Inpu, Filters as IN:None; Out:None. Then click apply and check it out. It may take a few moments before you see your ship turn Red and you GPS icon turn green with at least a couple of bars up. If this does not
work then you may need to reinstall. Like I say it works for me with both Raster and cm93. Good Luck Ted