I disagree, Vinny. When you fish for trout, especially at depth, and you suddenly see fish symbols or curves somewhere midway between you and the bottom, you better bileave it's a fish, and adjust you depth accordingly. You wouldn't miss much if it turns out to be a suspended seaweed, which is unlikely, but don't pass the opportunity. With time you learn to distinguish what's what and this fishfinder becomes an addiction. This is when you throw away your old "Fishing Buddy" and go and buy something really expensive