Ok im alittle confused on what freq. to use on di/ si I have a 998 hd si I fish on Norman mostly in water ranging from 15 to 50 ft. I've got some decent images but which freq works best for DI and Si I set my si range to around 85 foot . Maybe I need to give more info. Ive looked on you tube and scanned a lot of these archives for info . Thanks in advance .