Must have

I was skeptical to buy but took the chance after questions answered quickly by the company. I was worried it covered lake simcoe, Ontario and the Trent Severn. App is great. maps are extensive can be downloaded prior to going out and used with out Internet access. Gps is accurate as well as direction and speed travelled. Depths are bang on and matched my onboard depth finder.
Well worth the purchase. It is the same price as one paper chart but contains all the charts I could ever want and tracks my position for me.
I dont usually write reviews but I wish someone had when I was considering this purchase. It would have helped me so I thought I would help anyone considering buying this app.

Broom1212 about Navionics® Boating, v7.5.1