What is Navionics + Vision????

I can’t seem to find anything that says exactly what the Vision option is besides a extra 100 bucks.

Scroll to bottom of page and you will see the differences listed between Navionics+ and Vision+.....

https://www.navionics.com/usa/charts/features/garmin

Thank you.

Do you know if you need a card per unit? Or is like Lowrance 1 card shared over Ethernet?

Shared over ethernet....