=2. Rules for Aiming Up and Down.=--There is no fixed rule for aiming up and down. As a general rule aim should be directed at a point not more than 3 feet above or below the six o’clock line, according to the position of the target beyond or short of the zone for which the sights are set. The degree of allowance in aiming up and down will depend on the rate and direction of movement and the range of the target, and will be a matter for individual judgment. _If the difference between the range and the sighting exceeds 200 yards it will be best to alter the sighting._ =3. Exercises in Aiming Up and Down.=--To practise aiming up and down, under conditions approximating to those of service, the sights should first be fixed for a given range, and then fatigue-men or standing-figure disappearing targets disposed at various ranges should be alternately brought into view for short periods of time, representing troops in movement. Men should be told whether targets represent retreating or advancing troops, and aim up or down accordingly. Aim maybe criticized by using aiming-rests or aim-correctors. Section =22=.--Aiming-Off for Movement. =1. Instruction.=--Instruction in aiming at moving targets will be carried out during the latter portion of preliminary training. It will consist of practice in shooting at crossing targets on 30 yards or miniature ranges (see Chapter X). The pace of movement should be regulated as far as possible in strict accordance with that of service targets (see Practice No. 2, p. 217). =2. Crossing Targets.=--This term is applied to targets moving across the front of the firer, either at right angles from either side, or obliquely towards or away from him to either side. Such targets are not as a rule met with in battle except in the case of surprise, ambush, or a sudden encounter. Crossing targets may be met with by cavalry and infantry patrols, and by scouts during reconnaissance. _Fire will rarely be effective at a single man moving across the front at more than 300 yards range, or at a single horseman beyond 500 yards._ =3. Method of Aiming at Crossing Target.=--(i) When firing at crossing targets aim will first be taken on the object. Then, following it sideways, the aim will be carried in advance of the object, and kept in front of it at the desired distance until the rifle has been fired. The distance to which aim should be carried in advance of the target will vary according to the range, rate of movement, direction of movement and wind. For this reason no fixed rules can be laid down regarding aiming-off in firing at crossing targets. Fire effect will depend upon the judgment of individual men and fire-unit commanders, and on the fruits of practical experience. =4. Rules for Aiming-Off for Movement=--(i) =Targets crossing Front at Right-Angles.=--The following general rules will serve as a guide in firing at crossing targets at close range _moving at right-angles across the firer’s front_.