I had a fishin buddy also, used it on the tube very successfully . The side beam would show fish if they were near the surface , the main use , as mentioned , is to find contours and features .
I now have a Smartcast for use from the bank, you cast the transducer out and read out from the base station . AVOID these unless you like model making - the transducer's batterys do not seem to last as long as they should and you have to cut it open to replace it or buy another !! They work best dissected and fitted to a bait boat . I have also extended the aerial to increase the range .
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