The Humminbird 600033-1 AutoChart Zero Lines Map Card can be purchased to view AutoChart created maps on multiple Humminbird units. The Zero Line is the starting point for building your own maps with AutoChart. With these essential Zero Lines as your foundation, you can start to create your own accurate and detailed maps of any fishing spot, even when contour coverage doesn’t exist. To view the AutoChart created maps on multiple Humminbird units, simply export the map from the PC program to the extra Zero Line Map Cards and you’ll have multiple charts of your favorite fishing spots ready to view on a variety of compatible* Humminbird fish finders*Optional for select ONIX, ION, HELIX, 1100, 900, 800, and 600 Series models. Compatibility subject to change without notice.32 GB SD card with zero lines for with 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. Card must be present to get the detailed zero line base map to display in AutoChart PC All Humminbird units will require software update
