Dave Your going to love your 999. Mine is set on advanced used mode and I tweak settings every time out. As you get to know your unit you will too. There is no real secret HB does all the work. I simply adjust to the settings my eyes can see best that particular day. Don't be intimated by the technology and don't be afraid to tweak your unit to your own eyes. You can always go back to factory defaults and start again ; as I have. There are plenty knowledgeable users on this site who are willing to help with technical stuff ; I am not that that sharp myself.
I believe the 999 comes with a HD transducer ; which is one of the reasons I chose it. Terry


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