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Heavy Side > Mortars > Flashcards

Mortars Flashcards

0
Q

Number of mortars in PLT?

A

3-5

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1
Q

What is the MAX distance allowed between firing positions?

A

300 m

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2
Q

Number of mortars in SQD?

A

1

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3
Q

Number of mortars in section?

A

2-3

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4
Q

What does RSOP stand for?

A

Reconnaissance
Selection (position)
Occupation of mortar
Positions

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5
Q

What are the three methods by which recon can be done?

A

Map
Air
Ground

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6
Q

What are the 9 criteria that must be considered when selecting mortar firing positions?

A 
Mission accomplishment 
Tactical situation 
Range 
Target area coverage
Survivability
Overhead and mask clearance
Surface conditions
Communications 
Routes
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7
Q

What is the 1/2 to 2/3 rule?

A

Mortars should be able to fire at least 1/2 to 2/3 of their max range to the front of the forward elements of supported friendly force

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8
Q

What is overhead interference?

A

Interference overtop of mortar positions, ie, trees or buildings

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9
Q

What is mask interference?

A

To the front of mortar: hill, building, or tree

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10
Q

What are the three types of occupation?

A

Deliberate
Hasty
Emergency

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11
Q

Deliberate occupation

A

Extensively planned and prepared for

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12
Q

Hasty occupation

A

Not as much planning or prep as deliberate

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13
Q

Emergency occupation

A

Takes place when call for fire received while the platoon tactically moving

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14
Q

Most important criteria to remember during displacement?

A

Range

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15
Q

Two triggers of displacement?

A
  1. Commander orders platoon to displace

2. Event oriented: time schedule, phases, phase lines, or receipt of code words

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16
Q

When platoon displacement used?

A

When there is little immediate likelihood of enemy contact

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17
Q

What is biggest risk of platoon displacement?

A

Platoon cannot provide immediate fire support while moving

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18
Q

What are the five mortar firing formations?

A 
Parallel
Lazy W
Diamond
Triangle 
Six mortar star formation
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19
Q

Burst area for 60 mm mortars?

A

30 m

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20
Q

Burst area for 81 mm mortars?

A

40 m

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21
Q

Burst area of 120 mm mortars?

A 
60 m (Old)
70 m (New)
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22
Q

What is nomenclature for 81 mm mortar?

A

M252

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23
Q

Max elevation for M252?

A

1511 mils

24
Q

Minimum elevation for M252?

A

0800 mils

25
Q

How many mils for each turn of elevation wheel?

A

10 mils

26
Q

Total turns on traversing hand wheel?

A

20 turns

27
Q

Minimum range of M252?

A

83 m

28
Q

Maximum range of M252?

A

5,608 m

29
Q

What is max ROF on the M252?

A

30 rds per minute for 2 minutes

30
Q

What does BAD stand for?

A

Blast Attenuator Device

31
Q

How do you achieve max range on M252?

A

Lowest elevation, Max charge(4)

32
Q

How do you achieve minimum range on M252?

A

Max elevation, 0 charges

33
Q

When do you bore sight a mortar?

A

Before firing it

34
Q

What is the most important criteria when selecting firing position?

A

Mission accomplishment

35
Q

What is the minimum range that you can Boresight a mortar at?

A

200 m

36
Q

Range of angle of site scale?

A

1200-0-1200 mils

37
Q

What is the azimuth scale on the M2 compass?

A

0-6400 mils

38
Q

Weight of M2 compass?

A

8 oz

39
Q

Dimensions of M2 compass closed?

A

2 3/4 in x 1 1/8 in

40
Q

What increments of mils on angle of site mechanism?

A

20 mil increments

41
Q

How is angle of site on M2 compass numbered?

A

Every 200 mils

42
Q

What color is north seeking arrow on M2 compass?

A

White

43
Q

What color is the azimuth reading arrow (South end)?

A

Black

44
Q

When is M2 compass used to lay in Mortars?

A

Only when it’s the only means for getting direction

45
Q

What mil increments are on azimuth scale?

A

20 mil increments

46
Q

How is azimuth scale numbered?

A

200-mil intervals

47
Q

Which member of mortar team responsible for placing stakes?

A

AG

48
Q

What deflection and elevation settings on M252 when laying the gun?

A

Deflection 3200 mils

Elevation 1100 mils

49
Q

What are deflection and elevation set at when boresighting M252?

A

Deflection 0

Elevation 0800

50
Q

How far out are far and near stakes places from mortar position?

A

Far 100 m

Near 50 m

51
Q

Total mils on traversing bar?

A

200 mils, 100 L and R of center

52
Q

What does section sergeant say when he’s oriented the 0-3200 line and he’s ready to lay in mortars?

A

“Aiming point this instrument.”

53
Q

What does gunner say after he’s been directed to orient to the aiming circle and has done so?

A

“Aiming point identified”

54
Q

After orienting vertical line in sight dead center down the lens of respective gun sight, what does he announce to the gunner?

A

The deflection

55
Q

After gunner receives command to change deflection what does he do?

A

He repeats the deflection, splits the lens of aiming circle and announces,”ready for recheck.”

56
Q

Once gun and aiming circle are sighted on each other, with a difference of no more than 1 mil, gunner announces what?

A

“0 (or 1) mil, mortar laid.”

57
Q

When gunner makes announcement that gun is laid in, what does section sergeant say?

A

“Refer sight to 2 8 0 0 deflection and set out aiming stakes.”

58
Q

How far aiming stakes placed out for reciprocal lay?

A

1 at 100 m and the shorter 1 at 50 m

Heavy Side (7 decks)

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