20/20 puts it down about 15 to 16 feet at 1.3 and 30/30 is about 21 feet down I also ran 25/25 which was the sweet spot Yesterday that is about 18 down. Yesterday we need to cover 15 to 22 feet of water column as that is where the fish where. It’s a bit easier to cover with 12 boards out. You have to be a bit more precise with half that.