Well I pulled the trigger and bought the Ulterra with DI transducer and link. In the manuals it says I can use Auto Chart Zero Lines card. I have two one in my 899, the other in my Helix 9. Both have maps on them. In some of the user sections they state Lake Master cards but nothing about Zero line. Do the weather here on the coast of NC my boat is still in the driveway. So I don't know if my Zero Line cards will work for sure or do I have to have to have Lake Master card. Plus all the rivers and creeks I fish here on the coast are not on a Lake Master card. Which is why I went with a Zero line card and Auto Chart PRO.
Thanks