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I think a more appropriate question is "Who DOESN'T use a fish finder when lake fishing?" (from a boat, anyway). I like to hear the stories of how folks use various ground landmarks to line themselves up on a lake to pinpoint their favorite spot. These days it seems like you are at a disadvantage by not having one, however, there are some pretty competent folks that want to stay away from electronics and it's always interesting to hear their perspectives.
However, I agree with all the other comments about FF's being indispensible for finding structure, especially on new lakes. When you integrate it with a GPS (or have a separate GPS unit), it becomes even more useful as you can return to the same spots and they can even help you get back to the dock as it starts to get dark and you've lost your bearings (been there
). Of course, the price then rises dramatically. I would recommend the Lowrance fish finder tutorial to give you a good background:
http://www.lowrance.com/Tutorials/Sonar/sonar_tutorial_01.asp
I have never had any luck looking for fish at higher speeds, however. They say this is related to proper transducer positioning, ping speed and perhaps other settings. I would be interested to hear from the people who can see fish schools at >20 mph and how they do it.
However, I agree with all the other comments about FF's being indispensible for finding structure, especially on new lakes. When you integrate it with a GPS (or have a separate GPS unit), it becomes even more useful as you can return to the same spots and they can even help you get back to the dock as it starts to get dark and you've lost your bearings (been there
http://www.lowrance.com/Tutorials/Sonar/sonar_tutorial_01.asp
I have never had any luck looking for fish at higher speeds, however. They say this is related to proper transducer positioning, ping speed and perhaps other settings. I would be interested to hear from the people who can see fish schools at >20 mph and how they do it.