Even with my 2D units I'm always looking for bait and/or fish. I basically longline troll and there's not much sense in stretching out my lines if there's not evidence of any fish around. I dont always see the fish but if the bait's there the fish usuaklkly aint that far away.Thumbs Up I use the GPS side of the graph to keep me over a channel if that's necessary (sometimes the fish are scattered over flats so I dont need the GPS features).