Humminbird Fish Finder Accessories Marine

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.