If the water is 20 feet deep, you won’t see the bottom until it’s at the 20 foot range line.
But if there is something “right next to the bottom” but not on the bottom - is it 20 + feet to the side or directly under you.
According to what I’ve seen if it’s in the dark water column area it’s under you, but if it shows up on the shaded bottom then its away from you...
This means the graph range is kind of screwy, because it cant’ be both 20 feet down on the bottom and 20ft to the side when it sits on the line where the bottom where the water column ends.
So so where is the “zero” for the to the right or left