I use mine to find fish....bluegill bedding areas. I do use mapping and tracking feature. It comes in handy being out on a lake you don't know....just follow the track back in case you get disoriented. A 7 inch screen is about the best bang for the buck if one is on a really tight budget. The 9 inch and above screens make using di...si....and mapping so much easier. Many folks get really ticked when someone calls them a "fish finder". While you can locate structure...channels.....creeks and so on, but make no mistake it is a fish finder.....more so today than ever before with di and si. When I start out on one of the lakes I fish I can eliminate barren water real quick. While I do look at the 2d sonar at times the majority of my use comes using the di and si. Of course if one is vertical jigging the 2d sonar comes in very handy being able to see your jig and keep it at the depth where the fish are at. My last trip out down at Pickwick I checked a wing wall for white bass with my di and si.....nothing there...I didn't even make the first cast. I headed down river....pulled into a spot I thought looked promising and as I went from the current to slack water my di lit up with 100's of fish. Pulled into slack water...put trolling motor on spot lock....cast to the current break and proceeded to catch around 100 white bass and largemouth. One thing I do is believe in what my sonar is showing me....they don't lie. One certainly doesn't need a sonar to catch fish but it sure helps a lot.
Regards
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