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18 Bravo MG Employment > MG Employment > Flashcards

MG Employment Flashcards

1
Q

Which FM’s cover machine gun employment?

A

FM 3-22.68

FM 3-21.8

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2
Q

Describe cone of fire

A

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

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3
Q

What is the beaten zone?

A

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

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4
Q

What is danger space?

A

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

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5
Q

What are the 3 classes of fire?

A

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

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6
Q

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

A

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

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7
Q

What are the 6 subcategories of respect to gun?

A 
Fixed
Traversing
Searching
Free gun
Search and traverse 
Swinging traverse
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8
Q

What are the 4 subcategories of respect to target

A

Frontal fire
Flanking fire
Oblique fire
Enfilade fire

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9
Q

What is overhead fires?

A

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

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10
Q

What are the 6 methods of fire control?

A 
Pre-arranged signals
Range cards
Personal contact
Verbal
Hand / arm signals
SOP’s
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11
Q

What is a defilade position?

A

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

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12
Q

What are the 6 fire commands?

A 
Alert
Direction
Description
Range
Method of fire
Command to open fire
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13
Q

What is the sustained rate of fire for the M249?

A

50 rounds / min 3-5 round burst

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14
Q

What is the sustained rate of fire for the M240B?

A

100 rounds/min 6-9 round burst

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15
Q

What is the sustained rate of fire for the M60?

A

100 rounds/min 6-9 round burst

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16
Q

How often is barrel change for sustained rate of fire?

A

Every 10min

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17
Q

What is the rapid rate of fire for the M249?

A

100 rounds /min 6-8 round burst

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18
Q

What is the rapid rate of fire for the M240B?

A

200 rounds / min 10-12 round burst

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19
Q

What is the rapid rate of fire for the M60

A

200 rounds /min 10-12 round burst

20
Q

How often is the barrel change for rapid fire?

A

Every 2 min

21
Q

What is the cyclic rate of fire for the M249?

A

850 rounds/min

22
Q

What is the cyclic rate of fire for the M240B?

A

650-950 rounds/min

23
Q

What is the cyclic rate of fire for the M60?

A

550 rounds/min

24
Q

How often is the barrel change for cyclic fire?

A

Every 1 min

25
Q

What us the DA form for the range card?

A

DA form 5517

26
Q

What is final protective fire?

A

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

27
Q

What is final protective line?

A

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

28
Q

What is dead space?

A

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

29
Q

What is maximum ordinate?

A

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

30
Q

What is trajectory?

A

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

31
Q

What is the appropriate fire for point targets?

A

Fixed fire

32
Q

What is the appropriate fire for area targets?

A

Traverse and search fire

33
Q

What is the appropriate fire for linear targets?

A

Traversing fire

34
Q

What is the appropriate fire for deep targets?

A

Searching fire

35
Q

What is the appropriate fire for linear targets with depth?

A

Traverse and search fire

36
Q

2 techniques for air defense

A

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

Reference point

37
Q

Whats PDF

A

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

38
Q

3 keys of overhead fires

A

Coordination
Communication
Situational awareness

39
Q

3 assault firing positions

A

Hip
Under arm
Shoulder fire

40
Q

M192 tripod ( light)
Elevation
Traverse
Full handle manipulation

A

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

41
Q 
M122 tripod (heavy)
T and E graduated
T and E scale valve
Traverse hand wheel
Elevation hand wheel
Elevation bar
A

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

42
Q

Gunners rule

A

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

43
Q

3 types of wire obstacles

A

Protective wire- out of defensive trace and grenade range

Tactical - friendly side of FPL give enfilade

Supplementary- disguise channelize enemy into tactical wire

44
Q

3 sectors of fire

A

Primary- main sector of fire

Alternate- different position, same sector of fire

Supplementary- different position, different sector

45
Q

8 principles of employment

PICMDEEP

A 
Pairs
Interlocking fires
Coordinated fires
Mutual support
Defilade
Enfilade
Economy
Protection
46
Q

5 characteristics of fire

A 
Trajectory
Max ordinate 
Cone of fire
Beaten zone 
Danger space

18 Bravo MG Employment (1 decks)

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