Bought the Humminbird Helix 9 DI for the bow/ trolling motor.
Everything is cool except I thought you could use a regular SD card for the Auto Chart (once you use up your 8 hours of internal unit storage). Now I realize you have to purchase a Zero Lines card for that.
No biggie, but it is a considerable added expense.
Live and learn. Screw it. I'm gonna enjoy this unit!
Thanks for yall's help and input.

You are gonna love that unit on the calcasieu! Congrats!