I am thinking of using an iPad as a second gps when I go out. I already have the Navionics Boating app but as I understand it you need an iPad with cellular capabilities to take a SIM card, so that you have access to the charts live. Has anyone used an iPad in this manner, and does the auto routing function work out on the water? Is it a good second gps option or am I better off getting a second dedicated gps/plotter? Any suggestions and comments welcome.
cheers
Greg