You will mark fish with your elite 5 dsi. You will see small white specks/white lines. if your sitting still or moving a slower speeds... You can get arches on your DSI you, but the fish has to be in the apex of the cone and you or the fishing has to be moving.
Here's a picture mine and these are bass, fyi this was mounted a the bow, next to my HDS unit at the time. On the DSI unit I didnt have gps turn on, because I had my HDS gps on.
------Jason Gilstrap Pro Staff Lowrance / www.getalimitoutdoors.com