Heavy duty transom mount bracket with splash guard (4/8/12 pin transducers) Easily attach your compatible 4 - pin, 8 - pin or 12 - pin transducer to your boat's transom with this mount, which provides excellent sonar return at any speed. Because the transducer is still in the water, the mount does not protect it from underwater obstructions and you may feel some resistance on the boat. This included protection reduces splashing water and thus protects your compatible transducer when your boat is sailing at high speed. This bracket also allows you to mount the transducer to one of the notches in your boat's keel to adjust the orientation of the transducer so that it is parallel to the surface of the water; the boat. And since your transducer is out of the water when set up like this, the sonar won't track depths when the boat is on plane.