Think of side and down image as taking thin slices very fast and making a
picture like image. 2D is a cone narrow at top and wider at the bottom.
Side image needs straight line movement at 2-5 mph to get a close to real
image. If that transducer was mounted on tolling motor that moves with
coarse correction it won't give a good image. It dosnt affect 2D s cone much.
A non shielded troll motor will affect image If unit is ran off same batteries.
Hope this helps and good luck.