Figure 1^8. Sitting position, legs extended.
elbows into the sides of his body with his body forward and chest against his hands, thumbs in position to press the trigger. Brace the body and arm» firmly and aim low on the target, as the muzzle has a tendency to rise during firing.
To give the gunner practice in manipulation, the following procedure is used: the coach stands about 10 paces in front of the gun, and uses hand signals to indicate the direction in which the gunner is to move the muzzle. The gunner manipulates the handwheels, observed by the coach who makes necessary corrections. When the gunner reacts quickly, and can manipulate the gun as indicated, he is ready to continue his instruction (fig 150).
115. Sighting and Aiming Exercises a. First Sighting and Aiming Exercise (Sighting Bar).
(1) The purpose of the first sighting and aiming exercise is to teach the correct sight aline-ment and sight picture.
(2) When the top center of the front sight blade is in the center of the peep sight, the sights are correctly alined.
(3) A correct sight picture is one in which the sights are correctly aligned, with the top of the front sight blade just touching the bottom center of the target (fig 151).
(4) All men will be required to demonstrate proficiency in obtaining the correct sight aline-ment and a correct sight picture with a sighting bar (fig 152).
5. Second Sighting and Aiming Exercise (With Gun).
(1) The purpose of the second sighting and aiming exercise is to apply the preceding lesson to sight alinement of the machinegun sights on a target.
(2) A machinegun target is placed 10 meters from the pintle (fig 158).
(3) The instructor uses a demonstration crew of two assistants who are placed at the gun. One acts as the coach, and the other as the pupil during the demonstrations.
(4) The exercise is first explained and then demonstrated. The coach shows the gunner the correct sight picture. The coach then moves the gun off the target, and requires the gunner to move the gun back on the correct sight picture using the handwheels. (See para 129 for positions and duties of the coach.)
(5) The coach check« and critiques the alinement made by the gunner.
(6) Practical work is then conducted using the method demonstrated.
Figure 149. Sitting position, lega folded.
116. Sight Setting and Laying Exercises a. Sight Setting Exercise. The purpose of this exercise is to teach the method of setting the rear sight, and to develop accuracy and speed in its use.
(1) The exercise is first explained and demonstrated.
(2) The sight slide is set at the desired range by turning the elevating screw knob. The hairline through the peep sight is used as an index in setting the sight at the desired graduation.
(3) To demonstrate the exercise, the instructor has one demonstrator take the pupil's position at the gun and another the coach's position. The exercise is demonstrated as follows:
(a) The instructor announces the range, (For example: EIGHT HUNDRED.)
(b) The pupil repeats the range, sets the sight at the announced range, then assumes the correct gunner's position and reports UP.
(c) The coach checks the setting of the slide and points out errors.
(4) All men go to their groups, work in pairs, go through the exercise until each man has become proficient in accurate and rapid sight setting.
b. Sight Setting and Laying. The purpose of the Bight setting and laying exercise is to develop accuracy and speed in laying the gun on an aiming point, and to give additional practice in sight setting.
(1) The instructor explains that the exercise starts with the sight leaf down and the slide at 1,000 yards, that ranges less than 1,000 or greater than 1,800 will not be announced.
(2) To demonstrate the exercise, the instructor has one demonstrator take the pupil's position at the gun and another the coach's position. The exercise is demonstrated as follows:
(а) The instructor announces an aiming point and range. (For example: 1. PASTER NUMBER FIVE, 2. ONE TWO HUNDRED.) After giving the first element, the instructor pauses long enough to permit the pupil to repeat it and then gives the second element.
(б) The pupil repeats both elements, raises the sight leaf, and sets the sights. Upon completing the sight setting, he manipulates the gun by turning the traversing and elevating handwheels until the sights are accurately alined on the designated aiming point. He then assumes the correct gunner's position, and announces UP.
(3) The coach checks the sight setting and lay at the completion of the exercise.
(4) All men go to their groups, and instruction is continued.
Manipulation is the process of shifting the direction of the gun from one definite point to another definite point. After the soldier understands the principles of sighting and aiming, and can assume a satisfactory firing position, he is given instruction in manipulating the gun to obtain an accurate initial lay; then, to shift the direction of the gun to successive points with proficiency.
a. Second Manipulation Exercise. The instructor insures that the following instructions are understood and followed:
(1) A machinegun target is placed out 10 meters from the pintle for this manipulation exercise (figure 153).
(2) Manipulation of the gun for great shifts in direction is obtained by releasing the traversing slide lock lever, and moving the slide to the right (left). Small changes in direction are made by turning the traversing handwheel with the left hand. One click on the traversing or elevating hand wheel moves the strike 1 mil, or 1 centimeter on the target.
(3) Manipulate for elevation by rotating the elevating hand wheel with the left hand.
(4) Traversing and searching the target is accomplished by laying on the initial aiming paster (number 5 or 6) and then shifting to each of the other numbered pasters in order (5 through 10 or its reverse). All major shifts in traverse are done by loosening the traversing slide lock lever. When shifting from pasters number 7 to 8 or 8 to 7, use the traversing handwheel.
(5) Upon receiving the command, the pupil repeats the instructions, sets the sight, lays the gun on the designated paster, assumes the correct gunner's position, and reports UP.
(6) At the command FIRE, the pupil repeats the command, simulates firing two single shots, then shifts to the next paster and simulates firing until the exercise is completed. The pupil aims at each paster.
MOVABLE REAR 8I0HT, PAINTED BLACK
MOVABLE REAR 8I0HT, PAINTED BLACK
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