RichG wrote:
I've had shoot-thru transducers mounted on the center line with NO
appreciable loss of signal. Yes, the prohibition is normally for transom
mounted t'ducers....

But, you have a number of suggestions for trying any position out...why not
build the dam of plumbers putty on the center line and try it out also?


On a sailboat with a rounded hull like my Sandpiper 565, the common
wisdom is to mount the transducer close to the centerline and forward of
the keel.
You want the unit to shoot straight down to the bottom, not off at an
angle and the keel would create some turbulence.