I have the fl18 with the pro-view, I am trying to find/get a tri-beam. If I can't I'll buy a Marcum just to have a dual beam ducer. The pro-view is way to sensitive in water 20ft or less, I really don't like it even though I fish any where from 5ft to 160ft IT DOES NOT WORK in shallow water. It does not work for everything like they say. Once you fish with a good tri-beam you wont want anything else.