Heavy Weapons

Question 1

A beaten zone can be what shapes?

Answer 1

• oval
• cigar
• density decreases towards the edges.
• effective beaten zone= 85% of rounds

Question 2

The ____________ is between the muzzle of the weapon and the target.

Answer 2

Danger space

Max: 1.8 meters

Question 3

Classes of MG Fire:

Answer 3

Respect to ground:
-Grazing fire
-Plunging fire. Respect to target:
- frontal
-flanking
-enfilade
- Oblique
Respect to weapon
-fixed fire, traverse, search, T&S, free-Gun

Question 4

Grazing fire:

Answer 4

Come of fire rises less than 1 meter above ground. On level terrain grazing fire out to 600 meters. Danger space is from the end of the barrel out to the last round on the beaten zone.

Question 5

Plunging fire:

Answer 5

Plunging fire occurs when the danger space is within the beaten zone.
Results in a loss of grazing fire at any point along the trajectory.

Question 6

Frontal fire occurs when:

Answer 6

The long axis of the beaten zone is at a right angle to the front of the target.

Question 7

Flanking fire occurs when:

Answer 7

The gunner fires at the side of the target.

Question 8

Oblique fire occurs when:

Answer 8

The long axis of the beaten zone is at an angle other than a right angle to the front of the target.

Question 9

Flanking enfilade occurs when:

Answer 9

The long axis of the beaten zone coincides or nearly coincides with the long axis of the target.

Question 10

Fixed fire:

Answer 10

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

Question 11

Traversing fire:

Answer 11

Fire distributes in width by successive changes indirection

Question 12

Search fire:

Answer 12

Is distributed in depth by successive changes in elevation.

Question 13

M249 max ranges (eff.)

Answer 13

Max range: 3600m
Max eff range: bipod/point: 600m
Tripod/point: 800m
Bipod/area: 800m
Tripod/area: 1000m
Grazing fire: 600m 
Suppression: 1000m

Question 14

M249 rates of fire:

Answer 14

Sustained: 50 RPM in 3-5 RB
Rapid: 100 RPM in 8-10 RB
Cyclic: 650-850 RPM

Question 15

M240 max ranges:

Answer 15

Max range: 3725 m
Max eff range: 1100 m 
Max grazing fire: 600m
Area targets (bipod/tripod): 800 m/1100m
Point targets (bipod/tripod): 600m/ 800m 
Tracer burnout: 900 m
Suppression: 1800 m

Question 16

M240 rates of Fire:

Answer 16

Sustained: 100 RPM in 6-9 RB
Rapid: 200 RPM in 10-13 RB
Cyclic: 650-950 RPM

Question 17

Mk19 max ranges

Answer 17

Max range: 2212 m

Max eff range: 1500 m (point)/ 2212 (area)

Question 18

Mk19 rates of fire

Answer 18

Sustained: 40 RPM
rapid: 60 RPM
Cyclic: 325-375 RPM

Question 19

The____________ is the elliptical pattern formed on the ground or target by the striking rounds.

Answer 19

The beaten zone

Question 20

Fire commands

Answer 20

• initial fire commands
• subsequent fire commands
• doubtful elements and corrections
• abbreviated fire commands

Question 21

Factors that effect a burst of fire?

Answer 21

The gunner and rate of fire
The gun and ammo
Clarity of target
Air/ weather 
Distance

Question 22

What is line of sight?

Answer 22

Is an imaginary line, from the firer so eye through the sights, to the point of aim of the target.

Question 23

A burst of fire is a____________?

Answer 23

Of successive rounds fired with the same elevation and point of aim, when the trigger is held to the rear.

Question 24

Trajectory is?

Answer 24

The curved pathogens round takes during it flight.

-The trajectory of the round is effected by several factors.

Question 25

What is maximum Ordinates?

Answer 25

Maximum ordinates is the highest point above the line of sight which a projectile rises during its flight
( it occurs about 2/3 of the distance from the weapon to the target and increases with the range)

Question 26

What is cone of fire:

Answer 26

The pattern made by a group of rounds resulting from a burst of fire is the cone of fire.
( the pattern is caused mostly by the vibration of the MG and varies with ammo and atmospheric conditions)