Target separation to me… (I have an LX6) If my flasher is full from 21 feet all the way down to 40 feet… I want to target the BIG crappie in the column, the RED MARK on my flasher… not the yellow or blue… if the RED MARK is a big crappie, then Target separation is working.. if it is 3 small perch or 3 small crappie that are “lumped” into one mark, that is not good target separation. I would have been better off going after the 9″ crappie that was the yellow mark I pulled away from…. So yeah, it is kind of a big deal.