Here is another shot that highlights the advantages of a Side Image capable sounder. This was taken on the popular Mackerel Grounds. I was sounding around for a patch of Spanish Mackerel that had moved away from the boat. I knew they were there, but couldn't get onto them. There was nothing showing on the 2d sounder at all, the fish simply were not under the boat. But a quick flick over the SI and it was reviled that the fish were sitting off to the left of the boat. Very handy feature!