Navionics has added a new feature called, "Relief Shading" to both their app and their Platinum cards. The three dimensional perspective it gives of both deep and shallow structure is going to make it a lot easier to understand how topography affects currents and bait aggregation. Very excited to start using this new tool!
If you already have a current Platinum chip, all you need to do is download the latest updates and you'll be ready to go. If you have the app, you'll need to update the app itself as well as downloading the latest data.
You can click on the link to get more info