I used to fish from a 10ft jon boat with NO eletronics, mostly just pounding the shallows. Well, I have upgraded and I have a nice boat with Lorance eletronics. NOW, I understand how to use the sonar and how to read the sonar, but HOW do I know where the boat is in relation to what I am reading. It is a constant streem across the screen, and If I sit in the exact same place the sonar is still streaming across and does not send back necessarly the same picture. So once I finded stumps or other structure, do I circle back around until I find it again and estimate its rough location, mark it, and hope for the best. I feel like I am missing something - please help me connect the dots here. Any help would be appreciated.