OK....the unit performed much better today. I dont know why? I dont know what changed. The only 2 things that happened since it was screwed up the other night was I replugged it in...and I gave the battery the usual charge. At any rate..the water column looked alot better today and the sonar was cleaned up without that mess in the picture I posted. This is one addictive tool. I found myself wanting to drive around more than fish! Warren...do you prefer the blue, green, or brown setting for color? I kind of like brown. Also, how do i master chart speed vs. boat speed?