Eagle Cuda question

Several times today my Eagle Cuda 300 would show fish after fish after fish at the same depth (sometimes 4-5 feet, sometimes 8-11 feet)  It would just be a line of fish across the whole screen.  I know it was a false reading.  Anyone else seen this?  How do I fix it?

 Were you moving ?  To get the inverted  'V' you or the fish, leaf , stick or whatever must be moving fairly fast..  Drifting on fish they will show a straight line across at what depth they are... Royg

I was moving .5 to 1.5 mph per GPS with accuracy varying between 18 to 27ft.  The fish line would show for a long time, the time it took to move 100 feet or so.  I picked up to 2mph on the way in to the dock to warm myself up (chilly breeze set in) and it was still happening intermittently.

Did you have any tackle deployed?  Sounds like what I see when I have a weight or lure dangling in range of the sonar cone.

I thought it might be my downrigger ball, but it's mounted behind me and the transducer is near my knees.  It definitely shouldn't track it at 10' down and ~1.5 to 2 MPH.  It's never tracked it before.

I thought it might be my downrigger ball, but it's mounted behind me and the transducer is near my knees.  It definitely shouldn't track it at 10' down and ~1.5 to 2 MPH.  It's never tracked it before.

Did it only happen when you had gear in the water?  f so my guess is its your down rigger ball.  I can actually watch it drop to the bottom on the depthfinder (the "flasher" style display on the right side of the eagle cuda ) when I free spool down a 4oz or larger jig when bottomfishing , kinda cool.

Now that I think about it, it did it when I wasn't using the DR ball as well (nothing of mine under the boat)  I thought it might be some common thing that just happens with depthfinders.  Hopefully it will just be resolved on it's own next time I use it.

Whales?

(or pink elephants)

Ok, so nobody is as funny as they think they are as Spot has so sagely pointed out. So I guess I better try for a bit of content.

Nobody mentioned thermocline (changes in water temperature layers). On a good FF you can see them fairly clearly and the Eagle/Lowrance products have shown me more detail than any of my other FF's. They are the only one's I've been able to see my lure, the downrigger ball, and the downrigger line with my shoot-through-the-hull foam pressure mount installation (just the pressure of the foam pool noodle holds the transducer in place)

Try tweaking your sensitivity settings (should be "menu", ">", "enter" ). Move it down a bit and it will reduce the amount of "noise" that your seeing without hiding the fish. This is especially helpful in shallow water (<10'). You want it to be as sensitive as possible without excessive false returns and noise. There was a good tutorial out there somewhere that addressed setting up your ff for Pacific Northwest conditions, but I can't find it. The link below is from Lowrance and definitely worth a read.

http://www.lowrance.com/en/Support/Tips-and-Tutorials/Sonar-Tutorial/

I was personally hoping for a whale, elephants would be hard to put on the stringer.

Thermocline makes since. 

I see your marks are doubles,, Echos  maybe ?  Have it on auto bottom or set depth ? How much power/gain ?