New Marcum Showdown Fish finder

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Tube Dude I appreciate all the excellent unselfish information you always provide. Maybe I can riciprocate your help a bit regarding the problem you mention with your Showdown reading a large school of fish as the bottom. I got a Showdown this year and when a large school of suspended fish like Kokes or trout came thru the unit would toggle back and forth from the bottom reading to the school depth. Drove me nuts. Finally after reading the manual I realized the unit was on auto range mode. The solution is simple. Just switch to manual range mode by pressing the range button. This will cause the depth scale to flash on and off. Then simply press the up or down button to select the range scale you want -- say 0 to 40 feet for example. Fish coming thru at 15 feet will show without losing your bottom signal. If you move to a deeper zone in the lake you will have to re-select the appropriate range to pick up the bottom signal again. Really easy. Love my Showdown.

Again hats off to all your helpful posts.
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