Humminbird Auto Chart Card Zero Line North America

The Zero Lines Map card is the starting point for building your own maps with AutoChart or AutoChart Live. With these all important Zero lines as your foundation, you can begin creating your own, accurate and detailed maps of any fishing spot, even where contour coverage doesn&';t exist. 16 GB Space to maintain your custom maps Over 3.8 Million Unnamed water bodies . Over 140,000 named water bodies .