This past weekend I was on a lake that is basically all stumps. You're safe if you stay in the middle, but if you tried going in one of the creek arms, there was no clear path. I stopped well before where I thought the stumps might start and started idling. Sure enough, I hit a non-visible stump about 200 yards from the first visible ones. So I was wondering if anyone had any navigation tips? My lower unit would appreciate any help!