P1: Adjust Indirect Fire

P1: Adjust Indirect Fire
The Grader will stand at the target location and after saying, “Shot over”, will move to the calculated location.
Upon moving to the impact area, the Grader will raise one hand for several seconds to signify that the round
has impacted and cue the Candidate to begin their next calculation. The Grader must know the exact distance
scale to mark the round impacts accurately based on the Candidates corrections. For example, at 2000
meters a 25-meter-long fighting position will appear as 12.5 mils and a 50-meter-long building will appear as
25 mils. If this situation were scaled down to 50 meters away from the Candidate:
That same 25-meter fighting position will be .625 meters long and still appear as 12.5mils.
That same 50-meter building will be 1.25 meters long and still appear as 25 mils.
If the Candidate makes a 50-meter correction, the Grader will move 1.25meters.
If the Candidate makes a 400-meter correction, the Grader will move 10meters.
At 4000 meters a 25-meter-long fighting position will appear as 6.25 mils and a 50-meter-long building will
appear as 12.5 mils. If this situation were scaled down to 50 meters away from the Candidate:
That same 25-meter fighting position would be .3125 meters long and still appear as 6.25mils.
That same 50-meter building would be .625 meters long and still appear as 12.5 mils.
If the Candidate makes a 50-meter correction, the Grader will move .625 meters.
If the Candidate makes a 400-meter correction, the Grader will move 5
meters. Other distances or target sizes may be used, but:
They must be represented accurately and to scale.
The Candidate must know the actual size of the enemy target.
The simulated target should be far enough away to require the Candidate to use the binoculars.
Transmit the Call for Fire:
1. Candidate plots their location on the map.
2. Candidate determines direction to target using compass.
3. Candidate estimates distance to target using mil-relation method based on known size.
4. Candidate plots the enemy location on the map.
5. Candidate transmits call for fire to the FDC using three transmissions.
a. Send observer identification and warning order.
b. Send eight-digit grid to the target location. Must be accurate within 250 meters.
c. Send target description, method of engagement, and method of fire and control (direction if desired).
Adjust Fire:
1. If not already sent, give direction to target within 100 mils or five degrees as a four-digit number.
2. Adjust rounds. Grader will stand at or point to the Candidate’s initial impact location. Regardless of
how accurate the grid was, the Grader should put the initial impact far enough away to require at
least two corrections. All impact locations must be given accurately based on the target scale and the
Candidate’s stated corrections.
a. Spot each round when it impacts as right or left, over or short of your target.
b. Determine corrections for deviation left or right of the target. Measure the horizontal angle in mils,
using reticle pattern in binoculars. Estimate range to target and divide by 1,000. This is the Observer-Target
(OT) factor. If OT distance is 1,000 meters or greater, the OT Factor is expressed to the nearest whole
number. If OT distance is less than 1,000 meters, the OT factor is expressed to the nearest 1/10th. For
example, 800= 0.8. Multiplying the OT factor by the deviation measured in mils produces deviation
corrections in meters.
c. When the first range spotting is observed, make a range correction that would result in a range
spotting in the opposite direction. NO-GO if the Candidate does not bracket correctly. For example, if
you estimate that the first round impacted 50 mils left and 250 meters short on a target that is 2100 meters
away, add enough to get an over on the next round. You must add 400 meters to start successive
bracketing procedures. With an OT factor of 2, the round impacted 100 meters left. Your correction to the
FDC is "RIGHT 100-ADD 400-OVER.”
d. Continue splitting the range bracket until a 100-meter bracket is split or range correct spotting is
observed, maintaining deviation online, and transmitting all corrections to the FDC in meters. After each correction the Grader will state, “Shot over”, and the Candidate will reply with “Shot out.”
e. Use the following guide to establish a bracket. When the estimated round impact distance to the
target is:
1. More than 400 meters, add or drop 800 meters.
2. More than 200 but less than 400 meters, add or drop 400meters.
3. More than 100 but less than 200 meters, add or drop 200meters.
4. Less than 100 meters, add or drop 100 meters.
5. Add or drop 50 meters and announce Fire for Effect.
Fire for Effect:
1. When a 100-meter bracket is split or a range correct spotting is made, the fire-for-effect phase is entered.
2. Observe the results of fire for effect. Give a brief description of what happened to the target.
Example: "EOM, TARGET DESTROYED, ESTIMATE TWO CASUALTIES, OVER.

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