=5. Describing Targets.=--In all exercises men will be given a definite period of time--which may be decreased as progress is made--in which to locate and count targets. Each man should then be asked how many he has discerned. Men will in turn be asked to describe clearly and shortly the nature and position of any target they have discerned which has not already been described by a comrade. They should be taught to use military vocabulary in describing targets, and to indicate their position by the methods explained in Sec. 45. Visual training will thus lay the foundation of instruction in recognition of targets. =6. Use of Field-Glasses.=--In the case of targets which are difficult to see, and which have not been discerned, the instructor may allow men to discern the target with the aid of field-glasses, and then make them try to discern the target with the naked eye, using natural features of the ground in the vicinity of the target to locate its position. This instruction will help to train men in the use of field-glasses and in recognition of targets. =7. Effect of Movement on Visibility.=--Finally, fatigue-men will be employed to skirmish from cover to cover, and to perform the firing motions from behind cover, in order to show how motion catches the eye and exposes the firer’s position (Sec. 72, para. 3 [iii]). =8. Locating an Enemy by Sound.=--Blank ammunition will be used to give practice to the ear in locating an enemy by sound. Section =35=.--Military Vocabulary and Study of Ground.[16] =1. Importance of Military Vocabulary.=--(i) Soldiers must be trained not only to discern, but to describe service targets of various kinds. For this purpose they must be instructed in military vocabulary. Military vocabulary comprises the technical terms applied to the organization, weapons, equipment, formations, and duties of various arms. Definitions of these technical terms are contained in the various books of this series, including _Drill and Field Training_, _Field Entrenchments_, and _First Aid_. (ii) In this book, besides definitions of the technical terms which apply especially to musketry, a list of terms and definitions applied to natural and other features of ground and country is included on p. xxvi as being a necessary part of the military vocabulary used in the recognition and indication of targets. =2. Need of a Standard Vocabulary.=--It is important that the military vocabulary in each unit of an army, and, if possible, in the whole army, should be uniform as to its various terms, especially in regard to the indication and description of targets. Both fire-unit commanders and men should therefore be thoroughly trained in applying a uniform military vocabulary correctly to various service targets, such as units of various arms in different formations and to the different natural and other features of ground and country.