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Wavy return on graphs?! #12368098 08/01/17 09:49 PM
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i-Fish Offline OP
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I cannot figure out how to stop it. It's driving me crazy. It's on both the bow and console. Different transducers...??? Please help!


If you can't find em wind em.
Re: Wavy return on graphs?! [Re: i-Fish] #12368107 08/01/17 09:54 PM
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Capt Craig Offline
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This looks like trolling motor interference. The give away is the vertical lines visible in the water. I think if you turn off your trolling motor, you may see it clear up. Sometimes this occurs with the boat rocking side to side. You have to determine the solution by the process of elimination.


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Re: Wavy return on graphs?! [Re: i-Fish] #12368167 08/01/17 10:46 PM
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grout-scout Online Sleepy
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Hmmmm, not grass is it?

Re: Wavy return on graphs?! [Re: i-Fish] #12368279 08/02/17 12:02 AM
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I agree with Grout, looks like grass/weeds. Hard to tell in such shallow water. What does it look like when you get in deeper water?

Re: Wavy return on graphs?! [Re: i-Fish] #12368549 08/02/17 02:00 AM
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i-Fish Offline OP
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Did it mostly everywhere but it was quite windy for a while. White capping for sure. Once that settled the return got much better.


If you can't find em wind em.
Re: Wavy return on graphs?! [Re: i-Fish] #12368563 08/02/17 02:08 AM
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Vertical lines like that can indicate cross talk. Are you running both transducer at the same time. The bottom looks like you are in rough water

Re: Wavy return on graphs?! [Re: 44 Diesel] #12368651 08/02/17 02:38 AM
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Originally Posted By: 44 Diesel
Vertical lines like that can indicate cross talk. Are you running both transducer at the same time. The bottom looks like you are in rough water


I am running both simultaneously and that was my concern. But I didn't know what to do at the time or how to fix it going forward. Put one on standby while I'm using the other? Is that the only option?


If you can't find em wind em.
Re: Wavy return on graphs?! [Re: i-Fish] #12368677 08/02/17 02:48 AM
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Try using the 83khz on unit and 200 on The other, that should greatly reduce the cross talk if not totally eliminate it.

Re: Wavy return on graphs?! [Re: i-Fish] #12368731 08/02/17 03:04 AM
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grout-scout Online Sleepy
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Usually crosstalk comes in the form of lines (like a morse code) on the screen, it's very distinctive and if what you have is an electrical interference then it's the oddest thing I've ever seen. If it's not weeds, then it could possible be silt churned up. Just seems to consistent for crosstalk, but what do I know.


The lines at the top & middle of the graph are most def crosstalk, but we're talking about the bottom 1 foot, right?

Last edited by grout-scout; 08/02/17 03:07 AM.
Re: Wavy return on graphs?! [Re: i-Fish] #12368853 08/02/17 04:13 AM
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You just anwered your own question about the wavy bottom in the picture. The waves on a windy day cause the boat to rise & fall. Especially in shallow water pictures & higher sensitivity setting, turn it down one or two notches when shallow & see if it only gives a single bottom. Looks like you're getting a double reading for bottom. Notice its almost an exact copy of the actual bottom. Grass doesnt match the bottom contour exactly. Yes it varies, but that follows bottom TOO consistently. Its a double image.
.Mine does it too. Mine is worse on the front transducer because it rises & falls more than the stern transducer.
The vertical lines are crosstalk/ interference .

Last edited by Curtbass; 08/02/17 04:27 AM.

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Re: Wavy return on graphs?! [Re: i-Fish] #12368940 08/02/17 10:59 AM
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ring fry Offline
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Looks like waves to me.

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Re: Wavy return on graphs?! [Re: ring fry] #12369005 08/02/17 12:32 PM
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Originally Posted By: ring fry
Looks like waves to me.

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Yep...turn your gain down a bit, and some of that interference should clear up. Best thing would be to stop sonar on one of the graphs.

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