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18B Heavy > Mortar Exam Prep > Flashcards

Flashcards in Mortar Exam Prep Deck (80)
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1

List the mortar firing formations:

Parallel
Lazy W
Diamond
Triangle
6 mortar star

2

Bursting diameter for 60mm, 81mm, 120mm HE rounds:

30m
40m
70m

3

List the 3 occupation techinques

Hasty
Deliberate
Emergency

4

Describe the difference between hasty and deliberate occupation?

Time available to prepare mortar site

5

What is emergency occupation?

Call for fire received during tactical movement, no site prep

6

What are the techniques to displace mortar?

If enemy contact is unlikely and there is another unit to support, you can move all the guns at once.
If that criteria is not met, you must move guns by section or squad via alternate or successive bounding

7

How are bounding techniques determined?

Speed of situation, enemy contact, terrain

8

During recon, what is the ideal range criteria for emplacing mortar systems?

Cover 1/2 to 2/3 of the mortar's range and be able to shoot beyond friendly forces

9

List and describe the 3 effects of Indirect Fire:

Suppression: Enemy cannot perform job/duties
Neutralize: 10% casualties
Destroyed: 30% casualties or more

10

What are the 3 methods of recon?

Map, Air, Ground

11

List the 9 characteristics of position selection and which is most important?

#1 - Mission Accomplishment
Tactical Situation
Range
Target Area Coverage
Survivability
Overhead and mask clearance
Surface conditions
Commo
Routes

12

How many mortars makeup a platoon, section, and squad?

Platoon: 4 or more,
Section: 2 or 3,
Squad: 1

13

Describe the NSB fuze

Arms in flight, sends out radio waves waiting for object to give splash back, then goes off 0-1m above surface

14

Describe the PRX fuze

Similar to NSB, but goes off 1-4m above surface and rains steel

15

Describe Delay fuze

Detonates .05 seconds before ground impact.

16

Describe Superquick fuze

Detonates upon contact with surface

17

Does the multioption fuze (M734) have safety wires/pins ?

Absolutely not

18

Is there a safety on the Point Detonating M935 fuze?

Yes

19

What does a mortar round consist of?

Fuze, Body, Tailfin Propulsion System

20

Which fuze works best for troops in the open?

Impact/Super Quick, Point Detonate, NSB

21

Which fuze works best for targets in the prone, in shallow fighting positions?

PRX

22

What is the nomenclature for the aiming posts and how many are provided?

M14 and M1A2. 4 provided, can be stacked up to 2 high.

23

What is the nomenclature for the aiming post lights?

M58, M59. 2 green, 1 orange

24

What is nomenclature of the 81mm mortar system?

M252A1

25

What is the sustained and rapid rates of fire for the 81mm mortar?

Sustained: 15rpm
Max: 30rpm/2min

26

What are the components of the M252A1 system?

M253 cannon
M177A1 bipod
M67 gun sight
M3A2 baseplate

27

What is the minimum and maximum range for the M252A1

Min: 83m
Max: 5608m

28

What is the magnification power and field of view of the M67 optic?

4x magnification
FOV: 10*

29

What is the elevation range on the M177A1 bipod?

0800mils max to 1511mils min

30

What is the total traversing on the M177A1 bipod?

200 mil total (100 left/100 right)