Quote Originally Posted by Rojo View Post
I used a 6ft straight edge aligning the bottom outside corners and that 3ft straight edge too to get the Transverse level on the transducer. These older boats are off handmade blanks, not true to the cap seams so I always work from the bottom of the hull corners checking midway with the chines to get my side to side level. The displacement is always measurable that way.
I almost always fish alone, so my boat is a little starboard side heavy at idle speed. I duplicate the pitch and roll (from the Lowrance) in the garage and level the ducer both ways to that.