Welcome to crappie.com.....I have a 565 on my trolling motor and i run mine with the fish symbol turned off because i really want to see whats in the 20 degree cone the hollow fish symbols mean nothing to me because i'm wanting to see whats just in front of or just under the boat,i believe when you're seeing the bottom its in the 20 degree cone because for example if i'm fishin a bed in 12' of water the brush will start to show up on the left of the screen i can drop my jig down into the brush....hope this helps....good luck.