MG Employment

Question 1

Which FM’s cover machine gun employment?

Answer 1

FM 3-22.68

FM 3-21.8

Question 2

Describe cone of fire

Answer 2

Each round fired in a burst will have a different trajectory. The pattern created is called cone of fire

Question 3

What is the beaten zone?

Answer 3

Elliptical pattern formed on the ground on the target by the striking rounds

Question 4

What is danger space?

Answer 4

Space between machine gun and target where trajectory rises less than 1.8m above ground

Question 5

What are the 3 classes of fire?

Answer 5

Respect to the ground, respect to the gun, respect to the target

Question 6

What are the 2 sub categories of “respect to ground”?

Answer 6

Grazing fire: when center of cone of fire is less than 1 meter above ground.

Plunging fire: when danger space is within the beaten zone

Question 7

What are the 6 subcategories of respect to gun?

Answer 7

Fixed
Traversing
Searching
Free gun
Search and traverse 
Swinging traverse

Question 8

What are the 4 subcategories of respect to target

Answer 8

Frontal fire
Flanking fire
Oblique fire
Enfilade fire

Question 9

What is overhead fires?

Answer 9

Only delivered from tripod or vehicle using T and E and friendlies between 350m -850m

Question 10

What are the 6 methods of fire control?

Answer 10

Pre-arranged signals
Range cards
Personal contact
Verbal
Hand / arm signals
SOP’s

Question 11

What is a defilade position?

Answer 11

When the machine gun and crew are completely masked by terrain from enemy

Question 12

What are the 6 fire commands?

Answer 12

Alert
Direction
Description
Range
Method of fire
Command to open fire

Question 13

What is the sustained rate of fire for the M249?

Answer 13

50 rounds / min 3-5 round burst

Question 14

What is the sustained rate of fire for the M240B?

Answer 14

100 rounds/min 6-9 round burst

Question 15

What is the sustained rate of fire for the M60?

Answer 15

100 rounds/min 6-9 round burst

Question 16

How often is barrel change for sustained rate of fire?

Answer 16

Every 10min

Question 17

What is the rapid rate of fire for the M249?

Answer 17

100 rounds /min 6-8 round burst

Question 18

What is the rapid rate of fire for the M240B?

Answer 18

200 rounds / min 10-12 round burst

Question 19

What is the rapid rate of fire for the M60

Answer 19

200 rounds /min 10-12 round burst

Question 20

How often is the barrel change for rapid fire?

Answer 20

Every 2 min

Question 21

What is the cyclic rate of fire for the M249?

Answer 21

850 rounds/min

Question 22

What is the cyclic rate of fire for the M240B?

Answer 22

650-950 rounds/min

Question 23

What is the cyclic rate of fire for the M60?

Answer 23

550 rounds/min

Question 24

How often is the barrel change for cyclic fire?

Answer 24

Every 1 min

Question 25

What us the DA form for the range card?

Answer 25

DA form 5517

Question 26

What is final protective fire?

Answer 26

An immediate prearranged barrier of fire to stop enemy movement across defense lines or areas

Question 27

What is final protective line?

Answer 27

Predetermined line along which grazing fire is placed to stop enemy assault. Fixed in direction and elevation

Question 28

What is dead space?

Answer 28

Areas where a soldier is waist high to line of sight of gunner

Question 29

What is maximum ordinate?

Answer 29

The highest point above the line of sight the trajectory reaches between the muzzle of the weapon and the base of the target

Question 30

What is trajectory?

Answer 30

Is the curved path of the projectile in its flight from the muzzle of the weapon to its impact

Question 31

What is the appropriate fire for point targets?

Answer 31

Fixed fire

Question 32

What is the appropriate fire for area targets?

Answer 32

Traverse and search fire

Question 33

What is the appropriate fire for linear targets?

Answer 33

Traversing fire

Question 34

What is the appropriate fire for deep targets?

Answer 34

Searching fire

Question 35

What is the appropriate fire for linear targets with depth?

Answer 35

Traverse and search fire

Question 36

2 techniques for air defense

Answer 36

Football field- fast mover 2 fields. Slow mover 1/2 field. Reference point

Question 37

Whats PDF

Answer 37

Covers area with good fields of fire or likelihood of dismounted approach

Question 38

3 keys of overhead fires

Answer 38

Coordination Communication Situational awareness

Question 39

3 assault firing positions

Answer 39

Hip Under arm Shoulder fire

Question 40

M192 tripod ( light) Elevation Traverse Full handle manipulation

Answer 40

Elevation- 0-530 mils Traverse 0-900 mils Full handle manipulation 5 mils

Question 41

``` M122 tripod (heavy) T and E graduated T and E scale valve Traverse hand wheel Elevation hand wheel Elevation bar ```

Answer 41

T and E graduated- 5 mil increments T and E scale valve - left 100-450 right 100-425 total 875 mils Traverse hand wheel- 100 mils Elevation hand wheel- 50 mils Elevation bar- up 200 down 200. 400 mils total

Question 42

Gunners rule

Answer 42

At least 350m in front of gun range to target 850m or less set gun to proper range without disturbing lay of gun, set rear sight to 1600m. New line of aim is troop safety limit

Question 43

3 types of wire obstacles

Answer 43

Protective wire- out of defensive trace and grenade range Tactical - friendly side of FPL give enfilade Supplementary- disguise channelize enemy into tactical wire

Question 44

3 sectors of fire

Answer 44

Primary- main sector of fire Alternate- different position, same sector of fire Supplementary- different position, different sector

Question 45

8 principles of employment | PICMDEEP

Answer 45

``` Pairs Interlocking fires Coordinated fires Mutual support Defilade Enfilade Economy Protection ```

Question 46

5 characteristics of fire

Answer 46

``` Trajectory Max ordinate Cone of fire Beaten zone Danger space ```