Target map: using the green line

[overandout]

I understand that the green line shows the fish spread. However, where to place it in relation to the target? I frequently mis-judge where to place it and miss the target. The fish goes either in front of the target or behind it. The latter frequently happens when I put the green line on the target. Regardless of the line position, I always set the torp speed to high.


TIA!