I bought my first real graph the other day, it was a 899ci HD SI on clearance for $600. I'm stoked, except I cant get the images to get as clear as I would like. I want to upgrade next year so I didn't trade in for the HD transducer. My 01 Skeeter has an old analog depth finder in the dash that always runs when the dash has power (I forget what its called.) I like to run it as it lets me know how deep I am when I get on step where as the 889ci doesn't. Does anyone here think the chirp from it may cause some disturbances? I heard you can get feedback if your fishing too close to someone who is also running their graph on the same frequency. Thoughts?