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My resource is Fred Fritz of Fred Fritz Electronics. If you happen to contact Blue Sea directly they are familiar with him. He is the inventor of their ACR multiple battery isolation systems preventing spiking/surge of high amp motor starting and travels the west coast wiring boats. He tells me the reasons for his install practices as I expressed them to you. His body of work and methods have me not question his advice. For through hull direct drive propellers he places the transducers on the down hill stroke of the motor. For IO's and outboards the opposite. I scribbled notes (so please forgive me if I misplaced the terminology). His time is valuable and every time I ask a question and am given an answer I look at it as a gift and let him get on with his day. My transducers (I have two, one regular, one downvision) are being installed as he suggests......no debates.

He is a mom and pop outfit who has a Rarmarine distributorship. Usually reserved for larger volume distributors.

Garris