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Machine Gun Employment > Machine Gun Employment > Flashcards

Machine Gun Employment Flashcards

1
Q

Which FM’s cover machine gun employment?

A

FM 3-22.68 crew served MGs 5.56mm and 7.62mm

FM 3-21.8 infantry PLT and SQD machine guns and machine gun gunnery

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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 the cone of fire.

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3
Q

What is beaten zone?

A

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

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4
Q

What is danger space?

A

Space between the MG and the TGT where the trajectory rises less then 1.8 m above the 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 subcategories For respect to the ground?

A

Grazing fire: when the center of the cone of fire rises less then 1 meter above the 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 the gun?

A

Fixed, traversing, searching, search and traverse, swinging traverse, free gun

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8
Q

What are the 4 subcategories of respect to the target?

A

Frontal fire, flanking fire, oblique fire, enfilade fire

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9
Q 
What are the appropriate fires for respective targets?
Point 
Area
Linear 
Deep
Linear w/depth
A 
Point target- fixed 
Area target- search and traverse 
Linear targets- traverse 
Deep targets- search 
Linear targets w/depth- search  and traverse
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10
Q

What is overhead fires?

A

Fires only delivered from Tripod or Vehicles using T&E and friendlies between 350-850m

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11
Q

What is a defilade position?

A

When the MG and crew are completely masked by terrain from enemy

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12
Q

What are the 6 methods of fire control?

A 
Prearranged signals 
Range cards 
Personal contact 
Verbal
Hand/arm signals 
SOP’s
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13
Q

What are the 6 fire commands?

A 
Alert
Direction 
Description
Range 
Method of fire 
Command to open fire
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14
Q

What are the 7 principals of MG support?

A 
Mutual support 
Economy of ammo
Sited in defilade 
Sited to produce enfilade fire
Coordination
Cover and concealment 
Interlocking fire
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15
Q

What is the DA form for a range card?

A

DA form 5517

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16
Q

What is the gunners rule?

A

Can be applied when friendly Troops are at least 350m in front of the gun position and the range to target is 850m or less.

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17
Q

What are 2 ways to determine round impact?

A

Beaten zone

Tracers

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18
Q

How do gunners work in pairs?

A

By dividing the target area into 2 sections using midpoints references
Both gunners distribute fire by applying direction and elevation for the best coverage

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19
Q

Employment of MG in the defense has how many positions?

A

3
Primary
Alternate- different position same mission
Secondary- different position and mission

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20
Q

How many types of wire are there and what are they?

A

3
Protective wire- 35m outside hand grenade range outside defense trace
Tactical wire- meant to funnel enemy to focus fires on them
Supplementary wire- hide tactical wire and confuse the enemy

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21
Q

What are the 2 techniques for air defense for MGs?

A

Football field technique

Reference point technique

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22
Q

What are the 2 football field techniques?

A

Fast- 2 football field lead

Slow- 1/2 lead

23
Q

What is the purpose of a range card?

A

To provide a record of firing data and aids defending fire planning

24
Q

How many copies of the range card is prepared?

A

2 copies

25
Q

Who are the ranges cards for?

A

1 for the MG position

1 for squad leader

26
Q

What is FPF final protective fire?

A

Immediate prearranged barrier of fire to stop enemy movement across defensive lines or areas

27
Q

What is FPL 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 soldiers waist falls below the gunners point of aim.

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

The path the projectile takes from the muzzle of the weapon to the target

31
Q

What are the 8 principles of machine gun employment?

PICMDEEP

A 
Pairs
Interlocking fires 
Coordination of fires 
Mutual support
Defilade
Enfilade 
Economy 
Protection
32
Q

What do machine guns work in pairs?

A

Ammo conservation
Less wear and tear on weapons
Less barrel changes
Cover more area

33
Q

What is the mil range for elevation and traverse on the M192 tripod?

A

530mils -elevation

900mils -traverse

34
Q

How many mils can you elevate and depress the gun? And in how many increments? M192

A

235 mils- up
375 mils- down
10 mil increments

35
Q

What is the traverse scale numbering from right to left? M192

A

0-far right

900- far left

36
Q

On the minor scale one full rotation of the lever moves the weapon how many mils? M192

A

5 mils

37
Q

Rotating the lever half way moves the weapon how many mils? M192

A

1 mil

38
Q

The T&E scale major and minor are divided into how many increments? m192

A

Major- 5 mils

Minor- 1 mil

39
Q

What is grazing fire?

A

Center of the cone of fire rises less then 1 meter above the ground

40
Q

What is plunge fire?

A

When the danger space is within the beaten zone

41
Q

What is the mil range for traverse on the M122?

A

Numbered every
100 mils to 425 mils right of center
100 mils to 450 mils left of center

42
Q

Each click on the traversing hand wheel indicate how many mils?

A

1 click equals 1 mil

43
Q

What are the total number of traversable mils on the M122?

A

100 mils

50 mils left and 50 mils right of center

44
Q

One click on the elevation hand wheel equals how many mils?

A

1 click equals 1 mil

45
Q

How many mils are available in elevation change?

A

400 mils

200 above and 200 below

46
Q

Engraved into the handwheel is a scale divided into what?

A

5-mil divisions and 1-mil subdivisions

47
Q

What’s the total number of mils on the hand wheel?

A

50 mils

48
Q

Elevation readings are taken in how many parts?

A

2 parts
Major(elevation screw plate)
Minor(hand wheel)

49
Q

What is the sustained rate of fire for the M249, M60,M240B?

A

M249- 50 rounds/Min 3-5 rd burst
M60/M240- 100 rounds/min 6-9 rd burst
Barrel change every 10 mins

50
Q

What is the rapid rate of fire for the M249, M60, M240B?

A

M249- 100 rounds/min 6-8 round burst
M60/M240-200 rounds/min 10-12 round hurst
Barre change every 2 mins

51
Q

What is the cyclic rate of fire for the M249, M60, M240B?

A

M249- 850 rounds/min
M60- 550 rounds/min
M240B- 650-950 rounds/min
Barrel change every 1 min

52
Q

What is the max effective range for grazing fire?

A

600m

53
Q

How high does the barrel need to be when emplacing a firing table?

A

4-6 inch’s of the ground

Machine Gun Employment (1 decks)

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