Originally Posted by whisper
I thought the wifi talks to your iPad etc so you plan your route at home on navionics and then zap it across without faffing about with cards?
I have a wifi module linked into my NMEA2000 network - donegaldan made it at work one day from spare bits. In it's current format it does just what you say and a bit more, in that it allows approved users to view/control the HDS units from wherever they are on the boat. Music can be controlled too. I store all the boats manuals as PDFs on the second card, so I suppose an iPad would be a useful relay if fiddling in the console or engine bay. I have a very old iPad reserved for this purpose.
I understand that the more recent HDS models will link directly to the internet to download software and connect to Lowrance's crowd sharing bathymetric scheme. Obviously you need a marina with wifi. I'm a little restricted in that sense in that I don't have a marina...
Overall, I think it's a gimmick