Sorry about the crummy title! I mentioned this as a side comment on another thread, but thought I'd ask your opinions properly. I was fishing a while back with my finder on and a scuba-diver appeared by the side of my boat. Yes, I was a little shocked! To cut a long story short, he told me that he could hear the 'ping' of my sonar easily under the water. I know that cats are amazingly sensitive to noise and I aim to be as quiet as possible at all times (as a friend of mine puts it, 'Make a noise like a piece of cheese...'), but this was news to me. I asked a few other blokes what they thought. Several told me that they did better with the finder turned off, to the extent that would scout out a spot, drop down markers and return later with the sonar deactivated. What do you think? Will it put them off? I don't like fishing blind if I can help it... Thanks in advance for your views.