(iii) The instructor should also make recruits verify their comrades’ aim under his supervision as above described, and point out any errors which may have been made. _Extreme accuracy of aim must be insisted on even during the first lesson._ (iv) =Long-Range Sights.=--In aiming with the long-range sights a similar procedure to that which is described above will be pursued, but the eye will be placed _about 1 inch behind the small of the butt_, and the top of the head of the dial sight will be seen in the centre of the aperture (Fig. 12). _Unless special care is taken, lateral error will be made in centring the head of the dial sight._ Section =17=.--Common Faults in Aiming. =1. Taking too much or too little Foresight into the U or V of the Backsight.=--(i) It should be explained that a fine or half sight will cause the bullet to strike with Mark VI ammunition about 5 inches and 3 inches lower respectively, and with Mark VII 7 inches and 4 inches lower respectively per 100 yards of range, than when the correct sight is taken. (ii) The following method will be found useful to guide the soldier in taking the correct amount of foresight: Lay the edge of a piece of paper on the upper edge of the backsight cap, when the sight will appear as shown in one of the subjoined diagrams. A piece of cardboard laid on the cap and held in place by an elastic band will answer the same purpose. [Illustration: Incorrect: Incorrect: Correct Too much Too little foresight. foresight. =Fig. 13.=--FAULTS IN AIMING.] =2. Inaccurate Centring of the Foresight in the Notch of the Backsight.=--The soldier should understand that this inaccuracy will deflect the muzzle of the rifle to the side on which the line of aim is taken. For example, if aim be taken over the right edge of the notch the direction of the line of fire will be to the right of the line of sight. =3. Inclining the Backsight to one Side.=--In this case the bullet will strike low and to the side towards which the sights are inclined. The resulting error will be considerable at long ranges. =4. Fixing the Eyes on the Foresight and not on the Object.=--(i) If the eye is focussed on the foresight, the firer _will retain only a blurred image of the target_. This may not affect the result of his shooting at the distinct stationary bull’s-eye target, but when firing at troops in neutral-tinted uniforms, whether stationary or in movement, or at natural features of ground, _it is essential for fire effect that the eye should be focussed not on the foresight, but on the target, which must be watched closely while firing_.[11]