Flashcards in Call for Indirect Fire Deck (51):
What does the FO use the map for?
Determine the location of targets, friendly positions, his own position, & keep oriented during movement.
What is the first step any FO must do?
Know his position.
What 2 critical elements must an FO determine?
What measurements can direction be measured in?
Degrees or mils
What is a mil?
A mil is a unit of angular measurement that is equal to 1/6400 of a circle.
What is the standard unit of measure for direction in CFF?
Degrees may be converted to mils by multiplying what number of degrees?
What is the mil relation formula?
W = (R/1000) (M)
What is an Observer Target Line (OTL)?
An imaginary straight line from the FO through the target.
What is the Observer Target (OT) Direction?
The azimuth from the FO to the target.
OT direction is always expressed how?
To the nearest 10 mils grid & transmitted with 4-digits.
What ways can you get a direction to the target?
1. Scaling from a map
2. Lensatic compass
3. Measuring from a reference point
What is the standard unit of measure for distance?
What is the Observer-Target (OT) Distance?
The distance from the FO to the target.
OT Distance is always expressed how?
To the nearest 100 meters.
What 2 methods help us determine OT distance?
2. Map study
What are the 2 methods of communicating target location to the FDC?
1. Polar plot
2. Grid coordinates
What is a polar mission?
Where the FO describes the target location in relation to his position.
What are the advantages of polar mission?
It is fast & can be done without a map.
What are the disadvantages of polar mission?
FO's position must be first transmitted to the firing unit (POSREP).
What is a grid mission?
Where the FO can locate a target using the grid system of the military map (recommended).
What does a call for fire consist of?
6-elements & 3-transmissions with a break & a read back after each part.
What does the first transmission consist of?
1. Observer identification
2. Warning order
What does the second transmission consist of?
1. Target location
What does the third transmission consist of?
1. Target description
2. Method of engagement
3. Method of control & fire
Identify the following abbreviations: k;de; i/o; i/a; i/e?
k = over or out
de = this is
i/o = in the open
i/a - in the adjust
i/e = in the effect
Observer identification does what?
Lets the FDC know who is calling for fire & clears the net for the fire mission.
Warning order does what?
Gives the type of mission & method of target location.
What are the 2 types of missions?
1. Adjust fire
2. Fire for effect
What does the method of target location identify?
Whether using a polar or grid plot. Must announce if polar; grid is the standard.
What does target location do?
FO provides the FDC with the target location data that he determined using either the grid, or polar plot method.
What must be followed when giving a grid location?
6-digit coordination of the target
What must be followed when giving a polar plot location?
FO announces 'direction' followed by 4-digit OT direction in mils (1680), and then announces 'distance' followed by the OT distance to the nearest 100 meters.
What does target description do?
Should provide enough detail to enable the FDC to determine the amount & type of ammo to be used.
What must an FO's description contain?
1. Type of target (troops, supply dump)
2. Target activity (digging in, assembly area)
3. Number of elements in target (squad, plt)
4. Degree of protection ( in open, in fighting holes)
What does method of engagement do?
It is the element that the FO uses to describe the attack of the target (danger close & ammo).
What is the standard type of ammo?
What does method control do?
Determines when missions are executed (when ready, at my command, time on target).
What does the FO do if he needs to make a correction?
What must a MTO contain at a minimum?
1. Unit to fire
2. Changes to the call for fire
3. Number of rounds
4. Target number
What 3 reports will be send by the FDC during a fire mission?
3. Rounds complete
What is a spotting?
A FO's mental determination of the location of the burst relative to the target.
Spottings are made for?
Range & deviation
What are the 4 possible range spottings?
1. Over: detonates beyond the target
2. Short: detonates between the FO & target
3. Range correct: detonates at the same range as target
4. Range doubtful: detonates too far right/left of OTL that definite spotting can't be made.
What are the 3 possible deviation spottings?
1. On-line: detonates along the OTL.
2. # of mils left: detonates to the left of the OTL.
3. # of mils right: detonates to the right of the OTL.
How are corrections sent?
In meters & reverse order of the spotting.
What are the 4 methods of conducting range corrections?
1. Hasty bracketing
2. On-round adjustment
3. Creeping fire
4. Successive bracketing (method used at TBS)
What are the range corrections for the following distances: 0-1000m; 1000-2000m; & greater than 2000m?
0-1000m = add/drop 100
1000-2000m = add/drop 200
greater than 2000m = add/drop 400
What 4-items are included in the end of mission or RREMS?
Refinement - sent in increments of 10m & may be less than 30m
Record of target - target to be plotted for future
End of Mission - followed by surveillance & is last transmission
Surveillance - provides casualty &/or damage information
How are suppressive fires delivered?
1. Immediate suppression mission: used to fire on a planned target or target of opportunity.
2. Suppression mission: used to fire on planned target that is not currently active