The Zero Line is the place where the water meets the shore. It's also the starting point for building your own maps with AutoChart. 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 doesn't exist. 32 GB SD card containing zero lines for over 140,000 named water bodies and over 1.75 million unnamed water bodies in the United States and over 96,000 named water bodies and over 3.85 million unnamed water bodies in Canada. Plus there is 16 GB of free space to maintain your custom maps.
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