Originally Posted by Pete Meisinger
Experience speaking here. Shooting through the hull for depth does not work! I even got elaborate using transducer gel (ultrasound gel borrowed from the hospital) I built wells to hold water or gel, erratic at best.No Good. A knowledgable tech recently told me that transom mounted transducers have come a long way, but I am still concerned about the turbulence.
For reliable depth readings get a drill and bore a hole in your hull !! (painful, I know). Buy a brass transducer and mount it properly (or have it done). Believe me, the extra cost and bother is the best investment you will make on your boat!!
Works pretty darn good on my ST44!