Originally Posted by arn.george
I have a garmin 240blue - what problems did you have?
It keeps losing the bottom especially between 5-15 knots, moving the transducer about improves matters but it is still not a patch on the Lowrance sounders I have used fitted to other boats.
Once it loses the bottom it takes ages to reaquire, sometimes gets confused about what range it should be on and shows two bottoms occassionally when near a steep slope due to the signal being bounced about. sometimes it needs switched off to "unconfuse it"
None of the other sounders I have ever used exhibited these problems.