I'm trying to find West Coast fishing maps on a micro sd card that I can just plug into the back of the TZ12z. Navionics hot maps? Little confused. I have no definition at all on my TZ12z screen when I'm on any lake.
C-map offers MaxLakes versions in MM3 that can be licences and Navionics has new MM3 mega wides that cover lakes. It would be best to contact tech support with the Lat/lon of the area you are concerned with and ask for some screen examples of each to assist you in making a choice.