AutoChart DVD PC Mapping Software with Zero Lines Map Card. AutoChart Map coverage where you make it. Humminbird AutoChart for North America uses proprietary software that takes your Humminbird's sonar recordings and GPS to build custom lake charts. Create your own contour map on any lake in 3 simple steps 1.Record sonar data after inserting a blank SD card into your Humminbird Combo. 2.Import your recordings into the AutoChart PC program and convert your survey into a lake map. 3.Export your map onto the Zero Lines Map Card included to display on any compatible* Humminbird. *AutoChart is optional for select ONIX, ION, 1100, 900, 800, and 600 Series models. Compatibility subject to change without notice. Zero Lines Map Card The starting point to your mapping adventure. The Zero Line is the place where the water meets the shore and the starting point for building your own maps. Included with the AutoChart PC software is a 32 GB map card loaded with Zero Lines for millions of AutoChart Map coverage where you make it. Humminbird AutoChart for North America uses proprietary 1.Record sonar data after inserting a blank SD card into your Humminbird Combo. 2.Import your recor 3.Export your map onto the Zero Lines Map Card included to display on any compatible* Humminbird. Zero Lines Map Card The starting point to your mapping adventure. The Zero Line is the place where Now use i-Pilot Link on any lake when you create contours with Humminbird AutoChart. Get on the fas