How to fit sonar on a boat

Equipping a boat with a sonar, project from start to finish.
It comes with a bracket that you screw to the hull on the transom. Make sure the bracket is just high enough that the transducer is in the water under the boat, but the bracket is not extended under the boat. Make sure you put it in a place where it will not hit the trailer when loading/unloadig the boat. Seal the screws with silicone.