Thread: 997 noise snapshots

Some thing else I've been wondering about is what effect the intake and exhaust on live wells have on the water behind the boat. Looking at the last two images, the left side water column looks just like what mine shows when I run over another boats wake. I was surprised how long the water must hold bubbles from that.
Its not cheap but I use dual side scan transducers and what ever goes on between makes no difference. I attached a friends screen capture that is doing some thing like your post but notice how fast he can go and still get readings on the right side. The left side, if you look close there is just enough signal to show just a ghost of an image. I guess that is actually what the bottom of the river looks like where he was.
As for RFI, it can get in any where, not just power cables. On radios most times it comes in the antenna lead and I look that the transducer and cable as being the same thing. He might want to check his spark plugs and cables for bad connection or some thing. I'm wondering if that is RFI, could be just one plug or a wire with a break. Do they use carbon lead wires on boats?

WarrenMN