Be sure you go to the Navionics website and check to see which card will work on your unit. Depending on the unit you have, not all the cards will work. Be sure to notice some are navigational "charts" and some are "lake maps." There's a big difference.
Also, be aware not to download the updates from the Lowrance website that's supposed to update your unit so it will run the maps / charts better.
I had a LMS320 that wouldn't run anything but the classic charts. The Lowrance site said it would help the card do better if I updated the software on my unit. So I downloaded it from the Lowrance website and when I uploaded it to my unit, it crashed. Now my LMS320 won't work and Lowrance told me I was SOL. So be careful what you do.
