hey all, I was looking at buying a new sounder with gps etc and navionics on it, then I got talking to a bloke at the shop and he said you can just buy the navionics sd card for what region you want or the Australia wide one and if you have a Samsung tablet which I do you can put the card in it and it has the bigger screen etc and will work fine has any1 done this or is it bs I don't wanna go out and buy the card and it doesn't work also does the navionics show up hotspots for fish etc