M252 & Mortar Employment Flashcards Preview

18B Heavy > M252 & Mortar Employment > Flashcards

Flashcards in M252 & Mortar Employment Deck (42)
Loading flashcards...
1

What are the maximum and minimum degrees of angle and mil settings?

83* to 45*
1500mil to 800mil

2

How many mils are in one turn of the traversing and elevation knob?

10mils

3

Describe the 3 mortar element sizes and how many guns in each:

Squad: 1 gun, SL/AG/Gunner/AB
Section: 2 gun, Sec Sgt/SL/AG/Gunner/AB
Platoon: 4 gun, PL/PSG/2 Sec Sgt(FDC)/SL/AG/Gunner/AB

4

RSOP: name the factors of position selection

Mission Accomplishment (most important)
Tactical situation
Range
Target area coverage
Survivability
Overhead and mask clearance
Surface conditions
Communications
Routes

5

What is the range criteria for position selection?

Mortars should be able to fire at least one half to two thirds of their range to the front of the forward elements of the supported friendly force.

6

What is the most important step of RSOP?

Mission accomplishment

7

What is the difference between deliberate and hasty occupation?

The amount of time to prepare position by the recon team. (Hasty may get some prep done, but very minimal. Deliberate is covering all bases)

8

Under what two conditions may you displace the gun elements?

If contact is unlikely and if you have support of your local unit

9

If you can’t meet displacement criteria to move all at once, how should mortar elements travel?

By section or squad using successive or alternating bounding

10

What are the distances of separation for 60mm, 81mm, and 120mm in parallel formations?

60mm-30m
81mm-40m
120mm-70m
(Bursting diameter of HE ammo)

11

What are the 3 effects of IDF and describe them

Suppression- lowest standard - enemy not able to do their job
Neutralize - 10% casualties
Destroy - 30% casualties

12

Name and describe the fuze types fired by the M224:

Multioption M734: Proximity (1-4m above surface), Near Surface Burst (0-1m above ground), Impact (super quick- on surface), Delay (0.05 seconds after impact). No safety pins.

Point detonating M935: set to superquick or delay. Has pull wire safety.

13

Which fuze type is good for troops standing in the open?

Impact, Point Detonate, or NSB

14

Which fuze type is good for prone targets or in shallow fighting positions?

PRX or delay

15

Which fuze arms in flight, sends out radio waves waiting for object to give a splash back then goes off 1m above ground?

NSB

16

Which fuze type can hit a jungle canopy and then detonate once closer to ground?

Delay

17

Who makes up a basic gun crew?

Squad leader, Gunner, AG, AB

18

Explain the gun crew roles

Squad leader: supervise from rear of gun.
Gunner: on optic side, manipulates gun w firing data.
AG: opposite of Gunner, loads ammo, swabs bore, may move gun.
AB: preps ammo

19

After how many rounds should AG swab the bore?

10 rounds or end of fire mission

20

M253 cannon rates of fire

Sustained 15rpm Indefinitely
Max 30rpm for 2min

21

Ranges for the M253 cannon

Minimum: 83m
Maximum: 5608m

22

What power optic is the M67?

4x

23

What is the range in mils of elevation for the M177A1 bipod?

0800 (max range) to 1511mils (min range)

24

What is the M3A2?

The daggon’ baseplate

25

What is total traversing in mils and also traversing from center to left or right on the bipod?

200m total. 100mil each way.

26

Can the bubbles be touching the outermost red lines on the optic?

No

27

What are the 3 types of mortar rounds and their respective colors?

HE (olive drab green)
Illum( white)
Phosphorous(light green)

28

What is the M816 cartridge standard, type, range, fuze?

A, IR ILLUM, 5100m , M772 MTSQ
White

29

What is the M819 cartridge standard, type, range, fuze?

A, Phosphorous, 4875m, M772 MTSQ
Light green

30

What is the M821/821A1 cartridge standard, type, range, fuze?

A, HE, 5608m, M734 Multioption
Olive drab green