SeaNav
Works best on iPad 3 with cellular/wifi as this iPad 3G has a GPS assisted capability whether connected or not to a cellular network.
IPad 2 wifi (no cellular) dees NOT have a GPS Satellite Receiver in them so you would need to add a GPS receiver to an iPad 2. I tried using a Verizon Hot Spot Cellular with iPad 2 and neither worked, nor did Apple Maps or Google Maps.
There are no cellular towers in the middle of Lake Michigan, so the triangulated cellular cannot function on a iPad 2. You end up sliding along the shoreline and never go out into the Lake. The same problem happens with Apple Maps and Google on an iPad 2 with wifi. Apple Tech Support acknowledges that they are having problems with Apple Maps and today acknowledged issues reported with SeaNav and BoatBeacon, both sold through their AppStore because of the lack of a GPS receiver in the iPad.
I took back my iPad2 wifi and picked up a iPad 3G which allows SeaNav & Boat Beacon to work out on the water. The Technical Support and Management at SeaNav/Boat Beacon provided excellent support and personal attention to my concerns and answered all my help requests. A+
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