I just purchased a Lowrance HDS-5 Fishfinder/GPS Chartplotter with Lake insight and a Minn Kota trolling motor with Sonar.
I haven't received the unit yet and was curious.
Should I be concerned with Navionics maps or some of the other brands offered, and go ahead and get it ordered? Or does this unit already have what I need? There apparently is a card slot for this feature. As I read the info about this unit on the web, it says it comes loaded with some maps already.
I'm not really sure if I need it, but if I do... I want it!

Anyone very familiar with this product that can give any advise?