Thread: 2d sonar vs DI sonar

I find that all 3 features, 2d, DI, and SI contribute to the perfect crappie combination. The proper settings, and use, of these functions equals more fish on the hook. One caution - - - Humminbird units with both SI and DI have a compromise with the DI clarity; it does not give nearly the resolution of a dedicated DI unit and transducer. (EXAMPLE) - I have a597CI HD DI that I primarily use for DI only. - - My main unit,
899CI HD SI NAV COMBO is for all other functions. The 899 DI stinks compared to the 597 DI.

THE STYLE OF FISHING WILL HELP IN DECIDING WHAT YOU NEED,I DO A LOT OF BRUSH PILE FISHING AND WITH A TRUE DI YOU KNOW IF YOU SHOULD STOP OR KEEP GOING,YOU NOT ONLY CAN SEE THE FISH IN BP BUT ALSO WITH PRATICE CAN TELL IF THEY ARE BIG ENOUGH TO FISH FOR UNLESS BP STILL HAVE LEAVES ON IT.WITH PRATICE YOU CAN TELL IF WHITE DOTS ARE FISH OR ALAGUE GROWING ON IT,SI IS MORE A SEARCHING TOOL,DI MOSTLY TO IDENIFY WHAT YOU SEE AND 2D IS GREAT FOR SPEED AND JIGGING THE BRUSH AND WATCHING YOUR BAIT AND THE FISH THAT MOVES TO BAIT AND MOVES IN THE PILE,I HAVE 2D AND DI UP FRONT AND 1199 SI AND 859 DI AT CONSOLE FOR SEARCHING AND I RUN 859 TO SEE THE FISH ON PILES SO I KNOW IF NEED TO STOP OR NOT.IF YOU ARE MOSTLY A TROLLER THAN YOU MAY WANT IT SET UP A LITTLE DIFFERENT IF YOU CAN AFFORD IT