TBS Phase 3 Exam Questions with Correct
Answers.
Trajectory - ANS arching flight path of the round from the muzzle of the weapon to the
target
Cone of Fire - ANS pattern of each round fired due to vibration. Tolerances of ammo,
and weapon shooter
Beaten Zone - ANS Elliptical pattern formed on the ground or target by the striking
rounds.
Dead space - ANS target or enemy drops below line of aim or line of sight
Danger space - ANS the area between the muzzle and the beaten zone where the
bottom of the cone of fire does not rise above 1.8 meters (the height of an average
standing man).
Plunging Fire - ANS danger space confined to the beaten zone
Grazing fire - ANS center of the cone of fire does not rise more than one meter off the
deck. This is the most effective type of fire we can employ, and we will always seek a
position where we can bring the greatest amount of grazing fire upon the enemy.
Flanking Fires - ANS Fires relievers on flanks of target. Where target is oriented 90 or
more degrees away from firing unit
Frontal fires - ANS fires delivered on the front of a target, when the target is oriented on
the firing UN
Oblique Fires - ANS fire delivered on the oblique of a target, when the target is oriented
between 0 and 90 degrees to the firing unit.
Enfilade Fire - ANS the long axis of the beaten zone coincides with or nearly coincides
with the long axis of the target. This class of fire is either frontal or flanking and is the
most desirable class of fire with respect to the target, because it maximizes the use of
the beaten zone.
Employment Principles (PICMDEEP) P - ANS Pairs: we attempt to employ machine
guns in pairs at all times. This allows us to duplicate fires to ensure continuous fire
support even if one gun goes down. This also gives us "talking guns", giving us constant
fires on the target
Employment Principles (PICMDEEP) I - ANS Interlocking fires: reinforce and double the
firepower employed across the units frontage.
, Employment Principles (PICMDEEP) C - ANS Coordination of fires: dictates use of
appropriate weapons to fire on appropriate targets.
Employment Principles (PICMDEEP) M - ANS Mutual support: the weapons systems
need to be able to support each other. If one weapon is overrun or fails, the other
weapon needs to be able to fire the mission.
Employment Principles (PICMDEEP) D - ANS Defilade: allows us to fire the gun behind
the mask of terrain outside the effects and observation of the enemy.
Employment Principles (PICMDEEP) E - ANS Enfilade: the long axis of the beaten zone
coincides with the long axis of the target.
Employment Principles (PICMDEEP) E - ANS Economy: utilize the appropriate
weapons systems in accordance with the threat. Correlates with engagement criteria.
Employment Principles (PICMDEEP) P - ANS Protection: obvious considerations need
to be taken in the construction of machine gun positions in order to ensure maximum
survivability of the crew. Cover and concealment are critical.
Offensive fire control measures (TEMRD) T - ANS Target Precedence: What do I
shoot? When presented with multiple targets, what takes priority?
Offensive fire control measures (TEMRD) E - ANS Engagement Criteria: When do I
shoot it? In regards to friendly sequencing/enemy actions/terrain
Offensive fire control measures (TEMRD) M - ANS Minimum Safe Lines/Coordination
Lines: when are these established/how are they communicated?
Offensive fire control measures (TEMRD) R - ANS Rates of fire: When do I need
additional effects on target?
Offensive fire control measures (TEMRD) D - ANS Displacement criteria: MORT
What are not offense MG FCM's? - ANS Trigger Lines (These fall under Defense FCMs)
Defensive Fire Control Measures (TETFD) T - ANS Target Precedence: What do I
shoot? When presented with multiple targets, what takes priority?
Defensive Fire Control Measures (TETFD) E - ANS Engagement Criteria: When do I
shoot it? In regards to friendly sequencing/enemy actions/terrain. Trigger lines tied to
specific engagement criteria.
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