A row of dots roughly 12-16 feet behind the foul line marks your starting stance, spaced every 5 boards, so you can return to the same starting spot shot after shot.
Seven arrows sit about 15 feet past the foul line, far closer than the pins. Aim through an arrow instead of the pins themselves and your shot lines up more accurately.
Boards are numbered 1 to 39 across the lane; board 20 is dead center. A straight line from your foot position, through your target arrow, and out to the pins is the core rangefinder idea.
Pick a starting board and a target arrow to see where a straight shot would cross the pin deck. Real shots hook, so treat this as a reference line, not a guarantee.
Illustrative diagram, not to scale.
