depth sounders on 35TE

[skye peak]

I've got two depth sounders with transducers thru the bottom, midships, say in line
with engine flywheel.

When running over say 10 kts, they go nuts, not reading proper depth. I've tried fairing
the protruding transducers but still have not solved the problem.

Is this the standard transducer location, and are others having the same problem ?

[jointventure]

I believe you cannot run two separate fishfinders with separate transducers. I wanted to add a Lowrance unit to run with my Raytheon unit and was told no way