I am not familiar with Lowrance settings but can tell you that for si and di you may have to make small adjustments every time you put the boat in the water...or another body of water....to get an optimal image. The water for a particular day may be fine for a certain set of settings but those can change from day to day and on another body of water. If you get the settings really jacked up just go back to the default and you will have usable settings no matter the conditions.
Regards
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