Easy way to get your transom angle. Was looking for a way to get my transom angle so I could setup my transducer and found this. To me it is easier than using the plumb bob and ruler method.

SeaMount Transom Angle Measurement Diagram

How to measure your transom anglePlace a carpenter's square with the long side ( 22 1/2" ) against the keel. When the short side ( 14" ) comes in contact with the transom, take the measurement ( see the sketch below ) between the inside corner of the square and the boat bottom. Each 1/4" is equal to 1 degree in slope of the transom.

Inside Measurement