Bravo Course > Mortars Final > Flashcards

Mortars Final Flashcards

(64 cards)

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1
Q

Gun setting for min range

A

1511 mil and 0 charge

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2
Q

Traverse capabilities for 60mm

A

250 mil total

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3
Q

Difference between direct lay and direct alignment

A

Lay- gunner sees target

Alignment- FO observes target near gun target line

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4
Q

Most important position selection criteria

A

Mission accomplishment

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5
Q

60mm range
Min
Max
Handheld

A

Min-70m
Max-3490
Handheld-1340

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6
Q

Position selection factors

A 
Mission accomplishment 
Tactical situation 
Range 
Target area coverage 
survivability
Overhead and mask clearance
Surface conditions
Comms
Routes
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6
Q

Range criteria

A

Mortars should be positioned to cover 1/2 to 2/3 of MER

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8
Q

Traverse settings for the 120

A

136 mil from center
316 mil total with extension
5mil per turn

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9
Q

If FO can’t be with in 100m of fun, how close must he be to the left or right of the gun

A

100m left or right

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10
Q

What are the two ways a commander displaces guns

A 
On order
Predetermined event (phase line)
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11
Q

How many turns of traverse are allowed when boresigting

A

2 turns

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12
Q

3 main parts for mortar rounds

A

Fuze
Body
Tail fun with propulsion system assembly

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14
Q

Parallel formation definition

A

Mortars online, distance between mortars=burst diameter of HE round

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15
Q

Which end of the needle on M2 do you use to index azimuth

A

South seeking (black tip)

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16
Q

Burst radius for 120

A

75m

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17
Q

Difference between successive and alternative bounding

A

A- bounding element passes other element

S- bounding element gets online with other element

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18
Q

How do you determine total turns of traverse

A

60/81-10mil per turn

120-5mil per turn

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19
Q

Rules for traversing fire

A 
Width of target
Total turns of traverse
#of rounds 
# of intervals
#of turns per interval
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20
Q

M67 sight capabilities
Magnification
Field of view

A

Mag-4x

FOV-10 deg

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22
Q

What happens if water gets in the tube

A

Short rounds

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24
Q

Ranges for the 120

A

Min-200m

Max-7.2km

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25
Q

60 mm bipod designation

A

M170A1

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26
Q

Number of turns per interval

A

Total turns required divided by number of intervals

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27
Q

Elevation settings for 120

A

0710-1510

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28
81mm 3 types of rounds
HE Illum Smoke (WP/RP)
29
How do you find the mounting azimuth
Round azimuth to nearest 50mil
30
How do you make adjustments in direct lay
Refer sight to bisect splash then traverse back to target and re-bubble up
31
60mm baseplates
M7A1-circular, conventional M8-box M8A1- newer circular, hand held capable
32
What must you do if the base plate is not settled for direct lay
Level the bubbles and prepare to fire, remove the sight, fire two rounds, and put the sight back on and re-level bubbles
34
Number of intervals
1 less interval than round
35
Should you always use the lowest charge possible for range
Yes, unless you are close to the limit in order to avoid large deflections
36
120 tripod designation
M191
37
120/81/60mm mortar sight
M67
38
Gun settings for max range
800 mil max charge
38
60mm cannon designation
M225
38
``` 81 M177A1 bipod settings Elevation 1turn Traverse 1 turn ```
Elevation- 800-1511 1 turn- 10mil Traverse- 100mils from center 1 turn- 7 mil
40
Deflections rules Azimuth Mil adjustment
A-RALS(right add, left subtract) | M-LARS
41
80mm bipod designation
M177A1
42
81mm ROF
Max-30rnds per min, 2 min | Sus.-15rpm, indefinitely
43
60 rate of fire
Max-30RPM for 4 min | Sus- 20RPM indefinitely
44
What are two reasons an entire platoon can displace
Little likelihood of enemy contact Another element can provide adequate support
45
M2 compass characteristics Angle of sight scale Azimuth scale
Angle=1200-0-1200 Azimuth=0-6400 20mil increments Numbered every 200
45
M8 baseplate traverse capability
1600mil
46
81 range
Min-83m | Max-5,608
48
If FO is more than 100 m away, what ratio must he use for mil corrections
OT/GT
49
120mm cannon designation
M298
50
Advantages for engagements with out FDC
Speed and less people/equipment required
51
81mm baseplate designation
M3A2
51
At what distance should the aiming stakes be emplaced
100 and 50m | Or as far away as makes sense and half the distance
52
Rule of thumb for range estimates
``` 0-2000m = 200m error 2000+m = 600-800m error ```
53
Main difference between hasty/deliberate and emergency
Emergency isn’t planned. Usually happens while in route to planned position. Considered a “hip shot”
53
M734 fuze settings birst heights
Prox=13-3ft Near surface= 3-0ft Impact Delay-1/2sec
55
How are the mils graded on a whiz wheel
Numbered every 100, increment every 10
56
120 baseplate designation
M9
57
What must you do on the compass after finding the declination angle
Index it onto the compass
58
Which aiming stake is in the middle
Far pole in the middle
59
How are deviation corrections sent from FO
In mils
60
60 mm elevation settings Upper saddle Lower saddle
Upper=800-100 1 turn = 10mil Lower=1101-1511mils 1full turn= 15mil
61
3 types of position occupation
Deliberate Hasty Emergency
61
81mm mortar cannon designation
M253
61
How do you find declination angle
Clockwise rotation from grid north to magnetic north
62
Main difference between hasty and deliberate
Amount of Time for advanced party to prepare. Both are planned
64
Determine # of rounds
60/81- 1rnd per 30m or 4rnd per 100m | 120- 1 rnd per 60m or 2rnds per 100m
64
What’s the initial deflection for direct lay?
3200

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