You can chart the lake while you are fishing which is what I do but to get the most detail you need to make crossing patterns. I have got some decent details while spider rigging but when pulling and pushing cranks I learned the hard way not to make tight turms unless you enjoy spending time untangling lines or re-rigging them! Lol! I just need to go back to the areas I have fished and make some crossing patterns to add more detail. I hope to better use my Terrova with follow the contour after I get some maps made.

I hear you on the hunting! I spend lots of time bowhunting and green timber duck hunting on our land at Ethel, AR. If I'm not there I'm on the White River Refuge but I still have to feed my fishing addiction to during the fall and winter months! Ha-ha!