Executing an indirect fire mission - UNITAF Force Manual (FM)


Group

Executing an indirect fire mission
This group is not in a published chapter and should not be relied upon.



FM/BG-1159 - Target location methods

Three methods to specify a target:

  • Grid: Grid coordinates from the map.
  • Polar: Distance and direction from the observer.
  • Shift: Offset from a known reference point, e.g. a TRP or PPT.
FM/BG-1160 - Fire mission format and flow

A fire mission typically follows this sequence:

  1. Request: The observer sends a Call for Fire.
  2. Acknowledge: Fire controller acknowledges and confirms received data.
  3. Calculate: Fire controller determines and communicates firing parameters.
  4. Lay: Crews apply the firing data and report when ready.
  5. Release: The fire controller issues the fire order.
  6. BDA: The observer conducts Battle Damage Assessment.
  7. Adjust: Corrections are issued if required.

Steps 2 to 7 may be repeated until the desired effect on target is achieved.

FM/BG-1161 - Delegation of duties

Element leaders may delegate specific responsibilities to ensure efficient delivery of fire support.

Delegatable duties:

  • CFF Communication: Receiving inbound Calls for Fire.
  • Fire Mission Calculation: Determining charge, azimuth, elevation, and ammunition.
  • Fire Mission Communication: Transmitting fire orders to subordinate elements.
FM/BS-1162 - Calculate ballistics
  • Determine gun location
    • Determine grid and altitude (ASL) of each firing point.
    • Use centre-point only if all guns are within 50m radius.
  • Determine target location
    • Determine grid and altitude (ASL) via Grid, Polar, or Shift.
  • Determine sight to target
    • Calculate azimuth, distance, and altitude difference.
  • Develop the fire solution
    • Select charge using range table.
    • Determine base elevation; interpolate if needed.
    • Adjust for altitude difference.
    • Calculate time of flight.
  • Set ammunition parameters
    • Set proximity/timed fuses based on altitude or time of flight if applicable.
  • Verify all data
    • Recheck all data.
    • Ideally cross-check with a second calculator.
FM/BG-1273 - Issuing a fire mission to crews

Fire missions are given by the Fire Controller in the following format : 

  1. Gun/Section number
  2. Target Reference Point or Pre-Planned Target
  3. Release method
  4. Type of round
  5. Ammo information
  6. Number of rounds
  7. Charge
  8. Azimuth
  9. Elevation

 

1. Gun/Section number

ProwordMeaning
All gunsRefers to all elements in the Battery or Section
Section (#)Refers to all guns in the given Section(s)
Gun (#)Refers to the given gun

2. Target Reference Point or Pre-Planned Target

Target number assigned during calculation, each fire mission has a unique target identification number.

See: FM/BS-802 - Establish target reference points (TRP) and FM/BS-803 - Establish pre-planned targets (PPT)

3. Release method

See: FM/BS-1147 - Execute fire release methods

4. Type of round

Type of ammunition to be used

5. Ammo information

Used for special rounds where a setting is to be configured (i.e. laser code or timed explosion) 

6. Number of rounds

The number of rounds to be fired by each gun (i.e. an order of 5 rounds for 3 guns will result in a total of 15 rounds being fired)

7. Charge

Charge number to be used (please note some Pisces may show the charge as a name ('close', 'medium', 'far') instead of a number, in those cases treat the smallest one as 0 then following modes counting up 

8. Azimuth

Azimuth with a modifier for continuous fire. The azimuth is always given as a 4 digit number

9. Elevation

Elevation with a modifier for continuous fire. The elevation is always given as a 4 digit number

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