[1361]. Causes of errors. If the bull's-eye is directly above its proper position, the soldier has aimed high,—that is, he has taken too little front sight.
If the bull's-eye is directly below its proper position, the soldier has aimed low,—that is, he has taken too much front sight.
If the bull's-eye is directly to the right or left of its proper position, the soldier has not sighted through the center of the rear notch and over the top of the front sight. If to the right, the soldier has either sighted along the left of the rear sight notch or the right side of the front sight, or has committed both of these errors.
If the bull's-eye is to the left of its proper place, the soldier has probably-sighted along the right of the rear sight notch, or to the left of the front sight, or has committed both of these errors.
If the bull's eye is diagonally above and to the right, the soldier has probably combined the errors which placed it too high and too far to the right.
Any other diagonal position would be produced by a similar combination of vertical and horizontal errors.
After the above instruction has been given to one man, the line of sight will be slightly changed by moving the sighting rest or by changing the elevation and windage, and the exercises similarly repeated with other men.
Repeat the exercise, using the peep sight.
Third Sighting Exercise
[1362]. This exercise shows the effect of canting the piece.