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Reading a fishfinder

502 Views 2 Replies 2 Participants Last post by  climbnutt
I have a relatively inexpensive portable fishfinder,have had it for 6 years now and still don't believe the hundreds of fish swimming across the screen are actually fish.I've become to trust the depth reading only.My question is -does the unit sense live creatures or does it pick up "objects" underwater such as seaweed floating around,etc.I never know when there are actually fish under me or just underwater garbage.
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My sensitivity is always turned all the way down.The fish come up as actual fish shapes on screen.I guess there is no way to tell fish from debris?I do like it for depth- it really comes in handy crossing the reefs and cows when the tide is low
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