Army OCS - Call for Fire Exam
Questions and Answers
What is the Standard Method of Target Location? - ANSWER-Grid
What is the Standard Trajectory for Artillery? - ANSWER-Low Angle
What is the Standard shell/fuze combination for mortars and artillery? - ANSWER-
High Explosive (HE), Point Detonating (PD)
Which element of the call for fire do you specify ammunition? - ANSWER-5th
element, Method of Engagement
What is the purpose of direction? - ANSWER-The purpose of direction is to orient the
Fire Direction Control to the observer's view of the target.
Five Rules of Direction - ANSWER-OMG 10 4
1. O (Observer to Target)
2. M (Mils) preferred
3. G (Grid Direction)
4. 10 (Nearest 10 Mils)
5. 4 (digits)
Polar Call For Fire - ANSWER-*Fire Direction Control (FDC) needs to know your
location prior to Call for Fire*
Direction (Nearest 10 mils)
Distance (Nearest 100 Meters)
Change in elevation (If 35 meters or greater send in increments of 5 meters. If less
than 35 meters disregard.)
What does the fire direction center (fdc) need to know prior to polar MSN Call for
Fire? - ANSWER-Observer's Location
What increments do you send direction? - ANSWER-Nearest 10 Mils
When sending distance, you send it to the nearest - ANSWER-Nearest 100 meters
Grid call for fire - ANSWER-If firing an adjust fire grid mission, the FDC requires a
direction (nearest 10 mils) from the observer to the target either with the Message to
Observer (MTO), or prior to the first correction.
What is the minimum number of digits sent with a grid mission? - ANSWER-Six digits
(FDC can take up to ten)
When would you announce direction when conducting adjust fire, grid mission? -
ANSWER-With the message to the observer (MTO) or prior to first correction.
, What are the four parts of the Message to Observer (MTO)? - ANSWER-1. Call sign
of unit(s) to fire.
2. Changes to Call for fire.
3. Number of rounds per tube in FFE.
4. Target number
How is the term SHOT used? - ANSWER-The term SHOT is transmitted by the FDC
after each round fired in adjustment and after the initial round in the Fire For Effect
(FFE) phase.
How is the term SPLASH used? - ANSWER-The term SPLASH is transmitted by the
FDC to inform the observer when his round is five seconds from detonation.
How is the term Rounds Complete used? - ANSWER-•The term ROUNDS
COMPLETE will be sent when the final round in the fire for effect phase is fired.
What is Spotting? - ANSWER-Spotting is the number of mils measured between the
target and the impacting round.
What is the Observer Target (OT) Factor used to determine? - ANSWER-the
Left/Right deviation correction
How do you determine the OT factor? - ANSWER-1. Divide the distance from the
observer to the target by 1000.
2. Round to the nearest whole number.
3. If the decimal number is .5, round to the nearest even whole number.
4. If the distance is less than 1000 express OT factor as decimal.
How do you determine the deviation correct? - ANSWER-To determine the deviation
correction you must multiply the spotting times the OT factor (OT x Spotting =
Deviation Correction
Successive Bracketing - ANSWER-Should be used when observers are
inexperienced. The goal is to establish a bracket, that is, one round over and one
round short of the target.
Four Parts to the End of Mission (EOM) - ANSWER-1. Refine (deviation +/- less than
30, range less than +/- 50)
2. Record
3. End of Mission (End of mission, Tgt. #AA0001)
4. Surveillance (Tank Destroyed)
When do you send your location for a polar msn? - ANSWER-Before you initiate the
call for fire
How do you calculate deviation corrections? - ANSWER-OT Factor x Spotting =
Deviation Correction
Questions and Answers
What is the Standard Method of Target Location? - ANSWER-Grid
What is the Standard Trajectory for Artillery? - ANSWER-Low Angle
What is the Standard shell/fuze combination for mortars and artillery? - ANSWER-
High Explosive (HE), Point Detonating (PD)
Which element of the call for fire do you specify ammunition? - ANSWER-5th
element, Method of Engagement
What is the purpose of direction? - ANSWER-The purpose of direction is to orient the
Fire Direction Control to the observer's view of the target.
Five Rules of Direction - ANSWER-OMG 10 4
1. O (Observer to Target)
2. M (Mils) preferred
3. G (Grid Direction)
4. 10 (Nearest 10 Mils)
5. 4 (digits)
Polar Call For Fire - ANSWER-*Fire Direction Control (FDC) needs to know your
location prior to Call for Fire*
Direction (Nearest 10 mils)
Distance (Nearest 100 Meters)
Change in elevation (If 35 meters or greater send in increments of 5 meters. If less
than 35 meters disregard.)
What does the fire direction center (fdc) need to know prior to polar MSN Call for
Fire? - ANSWER-Observer's Location
What increments do you send direction? - ANSWER-Nearest 10 Mils
When sending distance, you send it to the nearest - ANSWER-Nearest 100 meters
Grid call for fire - ANSWER-If firing an adjust fire grid mission, the FDC requires a
direction (nearest 10 mils) from the observer to the target either with the Message to
Observer (MTO), or prior to the first correction.
What is the minimum number of digits sent with a grid mission? - ANSWER-Six digits
(FDC can take up to ten)
When would you announce direction when conducting adjust fire, grid mission? -
ANSWER-With the message to the observer (MTO) or prior to first correction.
, What are the four parts of the Message to Observer (MTO)? - ANSWER-1. Call sign
of unit(s) to fire.
2. Changes to Call for fire.
3. Number of rounds per tube in FFE.
4. Target number
How is the term SHOT used? - ANSWER-The term SHOT is transmitted by the FDC
after each round fired in adjustment and after the initial round in the Fire For Effect
(FFE) phase.
How is the term SPLASH used? - ANSWER-The term SPLASH is transmitted by the
FDC to inform the observer when his round is five seconds from detonation.
How is the term Rounds Complete used? - ANSWER-•The term ROUNDS
COMPLETE will be sent when the final round in the fire for effect phase is fired.
What is Spotting? - ANSWER-Spotting is the number of mils measured between the
target and the impacting round.
What is the Observer Target (OT) Factor used to determine? - ANSWER-the
Left/Right deviation correction
How do you determine the OT factor? - ANSWER-1. Divide the distance from the
observer to the target by 1000.
2. Round to the nearest whole number.
3. If the decimal number is .5, round to the nearest even whole number.
4. If the distance is less than 1000 express OT factor as decimal.
How do you determine the deviation correct? - ANSWER-To determine the deviation
correction you must multiply the spotting times the OT factor (OT x Spotting =
Deviation Correction
Successive Bracketing - ANSWER-Should be used when observers are
inexperienced. The goal is to establish a bracket, that is, one round over and one
round short of the target.
Four Parts to the End of Mission (EOM) - ANSWER-1. Refine (deviation +/- less than
30, range less than +/- 50)
2. Record
3. End of Mission (End of mission, Tgt. #AA0001)
4. Surveillance (Tank Destroyed)
When do you send your location for a polar msn? - ANSWER-Before you initiate the
call for fire
How do you calculate deviation corrections? - ANSWER-OT Factor x Spotting =
Deviation Correction
