Furflyin
I used the Auto chart Live mapping to make a topographical map of a few small lakes that weren’t on any navionics or lakemaster cards. The graph can store only so many hours before it starts rewriting the data over itself so if it’s a large area or areas, I would suggest a ZERO Line Card to hold the info. Only waypoints or icons are displayed on ur custom map just like a purchased map card. If you have time and some perseverance, your Autochart map will be more detailed than a purchased card. Hope this helps. Tightlines and Have a Blessed Holiday Season!
KrappieKrane