Interference or something else

[MikeR13]

Just wondering if you think the black lines are interference? Looking at potentially moving the transducer. Currently have a dff3d, tm 904 and tm 175 hw airmar. Tend to only run two transducers at one time. All three transducers are mounted between twin Yamahas

 

[Jsubzero]

looks like turbulence from the engines to me. show us pictures of how and where its mounted.

 

[Sparky Wire]

I agree, looks like turbulence to the starboard side.