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.