Transducer Geometry

Transducer geometry is crucial for device accuracy. The three traducers all face downward at 20 degrees off vertical. Transducer A is inclined toward the bow or +X direction. Transducer B is inclined to the starboard side at 120 degrees from Transducer A. Transducer B is inclined to the port side at 120 degrees from Transducer A. Note these are the neutral position — if your mounting is rotated in any axis you can set a mounting orientation, as described here.

It is not required that the transducers be mounted in a circular pattern. They can be in tandem or abreast or in other patterns, as long as the angles are maintained.