=5. Points of Military Importance.=--In addition to the description-points, when there is time, any points in the field of fire which are of military importance--such as a road, a bridge (Fig. 50), or the forward edge of dead ground--at which fire may suddenly have to be directed, should also be named and indicated to fire-unit commanders. This should be done, if possible, whenever such points are difficult to describe and cannot be indicated quickly. =6. Rules for describing Targets.=--(i) Targets must be indicated by short, accurate, clearly understood, descriptions of their nature, features, and exact position. (ii) Field-glasses may be used to discern targets before indicating them. _But aiming-points must always be described as they are seen with the naked eye, and not as seen through field-glasses, otherwise the men, being without glasses, may fail to recognize them._ (iii) In both attack and defence _the front should always be pointed out_, so that if a general direction, such as _half right_, is used to indicate a target, men will look in the proper direction with regard to the front. This is necessary, because the formation of the ground, the line of cover, and the siting of trenches does not always permit of men facing directly to the front. (iv) As a general rule the finger-breadth and clock-face methods of describing targets will only be used when they will _shorten and simplify_ the description, as well as make it more accurate. (v) Only one system of indicating targets should be employed in a battalion, and, if possible, in an army, so that the men may recognize targets described by commanders of other fire-units should they become separated from their own in action. (vi) When possible, targets will always be described and their range given _before the occasion for firing arises_, so that men may adjust their sights and be ready to open fire without further orders as soon as the target appears. =7. Finger-Breadth Method= (Fig. 49).--(i) This method may be employed to indicate roughly the approximate distance of an objective from a description-point. Only one hand should be used, even if more than one hand’s breadth is required to indicate the distance. The arm must be held out perfectly straight from the shoulder in front of the face, with the fingers vertical. If, however, the object is immediately _above_ or _below_ the description-point, the fingers should be horizontal. In measuring distances, one eye should be closed, and both the description-point and the objective kept in view.