I am guessing he is using the vexilar edge or whatever the open water graph is called since he said he has fish alarm
Personally I never use fish alarm or fish id on electronics
I am no expert either but here are some images that may help you
Soon as muzzle loader is done I will be out I saw a coyote almost every sit I had deer hunting in one of my spots. Took a shot at one at 150 yards and was just a little high it is a shame I love when I can smack em with a slug.