Krill,
Depending on what speed i'm traveling i can use max gain without too much interference if any! Not sure if this is a bad thing either?
After reading a post from Anthony a few weeks ago i realised my sounder is 82B-35R and it only covers middle range frequencies between 65khz and 110khz. I'm not sure how this is going to affect me in 300-600mtrs?? Ive had it adjusted down to the lower end but still not getting a good reading.
I basically used a smaller window of 15-25mtrs looking at the bottom with max gain on the lowest frequency I have. But still shit!! The boys from Furuno were great but I'm a poor student!!! so next time ill take more notes when i head out for a trip.
Cheers