Call for Indirect Fire

Question 1

what are the 3 parts of the fire support system?

Answer 1

Forward observer, fire direction center (FDC), firing unit

Question 2

what are the 5 rules of calling in indirect fire

Answer 2

1. plot your position
2. Observer target direction (OT Direction)
3. observer target Distance (OT Distance)
4. Observer target factor (OT Factor)
5. plot the target

Question 3

____ mils in a circle
1 degree = ____ mils

Answer 3

6400, 17.8

Question 4

why do we use mils?

Answer 4

able to convert angular deviation (Mils) into lateral distance (meters)

Question 5

how are mils expressed?

Answer 5

to the nearest 10 mils. If ends in a 5, round to the nearest even tenth

Question 6

When finding OT distance, what rules do we observe?

Answer 6

only measure in meters,
estimate to the nearest 100m

Question 7

OT Factor: mil relation formula

Answer 7

W = (R/1000)*M
(W = lateral distance in meters, R = Range, M = angle in mils)
- allows us to translate mils into meters

Question 8

If OT distance greater than 1000 meters,

Answer 8

express to the nearest whole number (1.2 ~ 1)

Question 9

OT factor =

Answer 9

OT distance / 1000

Question 10

If OT distance is less than 1000 meters,

Answer 10

express to the nearest 10th, (0.7 ~0.7)

Question 11

three transmissions (1-2, 3, 4-6)

Answer 11

1. Observer identification
2. Warning Order
3. target location
4. target description
5. method of engagement
6. method of fire and control

Question 12

what are the two methods of target location?

Answer 12

Polar, Grid

Question 13

types of missions

Answer 13

adjust fire, fire for effect, immediate suppression

Question 14

describe adjust fire

Answer 14

Not certain on target location. One gun fires one round at a time. Allows enemy time to leave target and seek cover

Question 15

describe fire for effect

Answer 15

Accurate target location and FO is certain first volleys will have an effect on the target. All guns firing simultaneously

Question 16

polar target location

Answer 16

Direction and distance
Must send POSREP

Question 17

grid target location

Answer 17

standard, Minimum 6 digits. Preface with grid zone designator

Question 18

what information should be included in a target description

Answer 18

enemy size, type, and degree of protection

Question 19

danger close for mortars and artillery is ____ meters

Answer 19

600

Question 20

method of control commands

Answer 20

“When ready” - standard
“At my command”
“Time on target” (TOT)
“Request splash”

Question 21

k abbreviation means

Answer 21

over/out

Question 22

de abbreviation means

Answer 22

this is

Question 23

i/o means

Answer 23

in open

Question 24

i/e means

Answer 24

in effect

Question 25

i/a means

Answer 25

in adjust

Question 26

successive bracketing

Answer 26

One round over and one round short of the target

Question 27

range bracketing guide

Answer 27

0-1000m: +/- 100,
1001-2000: +/- 200
2001+: +/- 400

Question 28

RREMS

Answer 28

Refinement, record as target, end of… , mission, surveillance

Question 29

Minimum deviation correction

Answer 29

30m