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Weapon systems > MG > Flashcards

MG Flashcards

1
Q

What are the principles of MG Employment?

PICMDEEP

A 
Pairs
Interlocking fires
Coordination of fires
Mutual support
Defilade
Enfilade
Economy 
Protection
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2
Q

What are the methods of fire control?

A 
Verbal
Hand and arm signals 
Prearranged signals 
Personal contact
Range card
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3
Q

What are the six elements of fire control?

A 
Alert
Direction
Description 
Range
Method of fire 
Command to open fire
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4
Q

M249/M240 sustained rate of fire?

A

M249- 50 rpm 3-5 round burst

M240- 100 rpm 6-9 round burst

Gunner pauses 4-5 seconds between bursts
Barrel change every 10 minutes

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5
Q

M249/M240 rapid rate of fire?

Trying to gain fire superiority

A

M249- 100rpm 6-8 round burst
M240- 200rpm 10-12 round burst

Gunner pauses 2-3 seconds between bursts
Barrel change every 2 minutes

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6
Q

M249/M240 cyclic rate of fire?

Used for combat emergencies

A

M249 850rpm
M240-650-950rpm
M60- 550rpm

Barrel change every minute

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7
Q

What positions are used in the offense?

A

Primary
Alternate
Supplementary

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8
Q

What are two types of techniques used for air defense?

A

Football field technique
(Fast mover- 2 fields, Slow mover- 1 field)
Reference point technique

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9
Q

What are the 3 assault firing positions?

A

Hip firing position
Underarm firing position
Shoulder firing position

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10
Q

What are the miscellaneous firing positions?

A 
Sitting position with tripod mount 
Prone position
Legs crossed
Legs braced 
Aircraft firing position
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11
Q

Who is a sector of fire assigned to?

A

An individual, a weapon, or a unit

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12
Q

Who is a primary sector of fire assigned to and why?

A

Assigned to a gun team to cover the most likely avenue of enemy approach

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13
Q

What is an FPL?

A

A predetermined line along which grazing fire is placed to stop an enemy assault

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14
Q

What is a principal direction of fire?

A

Direction of fire assigned primarily to cover and area that has good fields of fire

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15
Q

What is grazing fire?

A

Occurs when the center of the cone of fires rises less than 1m above the ground

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16
Q

What is plunging fire?

A

When the danger space is within the beaten zone. Occurs at longer ranges, when firing from higher ground to low ground, and when firing abruptly

17
Q

What are the classes of fire in respect to the ground? Weapon? Target?

A

Ground- Grazing and plunging fire

Weapon- Fixed, Traversing, Searching, Traverse and Searching, Swinging Traverse, Free gun

Target- Frontal, Flanking, Oblique, Enfilade

18
Q

What is trajectory?

A

Path of the round in flight to the target. Recoil, stability, and control of the weapon all affect the trajectory of the round.

19
Q

What is the beaten zone?

A

Elliptical pattern formed on the ground by the striking rounds. Length changes as the range to the target increases

20
Q

What is danger space?

A

Space between the MG and the target where the trajectory rises less than 1.8m off the ground.

21
Q

Describe fixed fire?

A

Delivered against a point target when depth and width of the beaten zone covers the target

22
Q

Describe traversing fire?

A

Fire distributed IN WIDTH with successive changes in direction.

Gunner selects several aiming points throughout the width of the target. Aiming points are close enough to provide coverage without wasting ammo

23
Q

Describe Searching fire?

A

Fire distributed IN DEPTH by changes in elevation.

Gunner selects several aiming points. Changes made to each aiming point depend on the range and slope

24
Q

Describe Traversing and Searching fire?

A

Fire distributed IN WIDTH and DEPTH by changes in elevation and direction.

Provides good coverage of a target

25
Q

Describe Swinging Traverse

A

Wider distance can be covered with distribution of fire laterally.

No change to elevation or range. Used against a target with great width

26
Q

Describe Free Gun

A

Fire distributed against a target that requires rapid, major changes in direction and elevation that can not be achieved while using the T&E

27
Q

What is Frontal Fire?

A

Occurs when the long axis of the beaten zone is at a right angle to the front of the target or in line with the target

28
Q

What is Flanking Fire?

A

Occurs the when the gunner is to the flank of the target

29
Q

What is Oblique Fire?

A

When the long axis of the beaten zone is at any other angle than a right angle

30
Q

What is Enfilade Fire?

A

When the long axis of the beaten zone coincides with the long axis of the target

31
Q

They types of fire used for Point, Area, Linear, Deep, and Linear target with depth?

A 
Point- Fixed fire
Area- Traverse and Search
Linear- Traversing Fire
Deep- Searching Fire
Linear targets with depth- Traverse and Search
32
Q

What are the two types of range cards?

What is the DA Form?

A

FPL and PDF

DA Form 5517-R

33
Q

Range Card data?

A 
Weapon Symbol
Sector of Fire
PDF or FPL
Range, Azimuth, and number label to predetermined target
Dead space 
Distance and azimuth from a known point or 8 digit grid 
Magnetic north arrow 
Data section
34
Q

M122 Tripod

A

Traversing Hand wheel- 50mils left and 50 miles right of the center. Readings taken from left side

Traverse bar is numbered every 100mils to the 450 mils to the left of center and 425 mils to the right of center

Elevation handwheel- 1 click= 1 mil
Handwheel scale divided into 5 mil divisions and 1 mil subdivisions for a total of 50 mil increments.

There are 200 mils above and below the zero mark for a total of 400 mils in elevation change

35
Q

How is the major and minor reading taken on the M122 tripod?

A

Major is taken from the elevation screw plate
Minor is taking from the handwheel.
Two readings are separated by a slash (/)

Weapon systems (15 decks)

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