I was going to recommend looking into getting a different chip like the Navionics one, but it sounds like you sorted it all out! I've been using Navionics lately too and agree it's a great for the cost - no issues with it so far.what i've learned since then is to send back the Nautic Pro chip and buy the Navionics chip for the south florida , carribean and all of south america, for about $185. lot of charts for the money . Navionics advertise that its the same setup as paper charts with all the right info. their web site is awesome, the most complete marine charts of the world that you can use with an internet connection of course.