Annex B Study Guide Flashcards
Muzzle Velocity for the M242 Ammo
M791 1345 +/- 20 MPS M792 1100 +/- 20 MPS M793 1100 +/- 20 MPS M910 1525 +/- 20 MPS M919 1385 +/- 20 MPS
line of departure
a prolongation of the line running through the axis of the gun bore as the projectile leaves the muzzle
Angle Q
The angle beginning at distance Y, located to the left and right of the dispersion area, which defines the area which contains projectiles after making initial contact with the impact medium
range to maximum ordinate
the range at which the maximum ordinate is reach.
out to this range the projectile is ascending
the range to maximum always occurs shortly beyond half the target range
When firing M791 at a range of 1800M W/ 30 KpH Crosswinds blowing from left to right, the round will impact ____ mils and _____.
.9 mils and left
Distance X
The maximum distance a projectile (to include guided missiles and rockets) will travel when fired or launched at a given quadrant elevation with a given charge or propulsion system.
Secondary Danger Zone
An area outside of the primary danger area which provides containment of fragments, debris, and components from frangible or high explosive projectiles and warheads functioning on the far edge of the primary danger area. Areas A, B, and C are secondary danger areas.
Company Ops
During
- Supervise all work details.
*Control the movement of personnel from firing
positions to additional training and other
administrative areas.
M240 max range
4100 Meters
MG
During
- Ensure that range firing is conducted in accordance
with the appropriate gunnery firing
table. - Ensure that remedial training is conducted by
LCEs on site as needed. - Ensure that correct zeroing is accomplished.
- Supervise the LCEs.
- Assist the safety personnel in the clearing of
weapons, when required. - Assist the maintenance personnel with troubleshooting
and correcting fire control malfunctions,
when required. - Assist the commander in determining or verifying
alibi conditions.
If a gunner degreases 200M while firing APDS-T at the range of 1400M the second round will travel ____ Meter lower than the previous round?
1M
Muzzle Velocity for the M242 Ammo
M791 1345 +/- 20 MPS M792 1100 +/- 20 MPS M793 1100 +/- 20 MPS M910 1525 +/- 20 MPS M919 1385 +/- 20 MPS
vertical gun jump
the angle measure in mils, between the line of departure of the projectile and the line of elevation
M240 Muzzle speed
2750 FPS
superelevation
the angle measured in mils, between the line of sight and the line of elevation
Ricochet Area
The area located to the left and right of the dispersion area that contains projectiles after making initial contact with the target medium.
Tracer Burn Range in Meter for the M242
M791, M792, M793, M910, M919 are >2000 meters
Ammunition NCO
Over All
- Ensuring that ammunition is accounted for by
type and lot, is correct for the scheduled firing,
and is properly stored and secured on the
ammunition pad at the training area. - Checking any ammunition resupply ensuring
that it is not restricted or suspended (verifies
with the RSO and TB 9-1300-385). - Issuing the correct type and number of rounds
as instructed by the master gunner. Keeping a
running inventory to crosscheck daily expenditures
turned in to the RSO. - Ensuring that the ammunition pad is maintained
in an orderly fashion and continually policed of
links, brass, and packaging materials
M793 Muzzle Velocity
1100 +/- 20 mps
Surface Danger Zone (SDZ)
The ground and airspace designated within the training complex (to include associated safety areas) for vertical and lateral containment of projectiles, fragments, debris, and components resulting from the firing, launching, or detonation of weapon systems to include explosives and demolitions
Distance W
The maximum lateral distance a projectile will ricochet after impacting within the dispersion area. Distance W defines the maximum lateral edge of the ricochet area.
Master Gunner
Before Range
- Move to the range or training site before the
firing unit. - Ensure that concurrent training is set up properly.
- Brief the OIC of firing and the RSO on the
SDZ that was used for each type of ammunition
and each firing position. - Brief the unit on the conduct of fire and the
tasks, conditions, and standards for each firing
evolution.
Master Gunner
Over all
- Preparing a surface danger area diagram and
range overlay, if required. - Preparing scaled ranges if required.
- Organizing and setting up range firing exercises.
- Ensuring that range firing exercises are properly
conducted. - Coordinating the target array and the layout for
range firing and qualification. - Establishing remedial training on site, as
needed, by coordinating with the LCEs and
platoon sergeants to identify crew deficiencies. - Ensuring that an effective LCE program is
implemented for standardization.
OIC
During the Range
- Maintain all required communication, and for live fire range exercises, ensures that BACK-UP communication are available.
- Monitor the SDZ to ensure that it remains
clear. - Ensure that the firing is halted promptly when
an unsafe act is observed or reported. - Ensure that misfires are handled in accordance
with procedures established for the weapon - Ensure that weapons are cleared and checked
during temporary suspensions of firing. - Ensure that personnel do not move to or from
the small arms or crew-served range firing
lines without permission from the OIC or the
RSO. - Ensure that materiel is not removed from the
firing line without permission from the OIC or
the RSO. - Maintain records with the type of ammunition
fired, the number of rounds fired, and the number
of duds with approximate locations. - Maintain observation of the impact area in
order to assure projectiles land within prescribed
limits.
BALLISTICS
the science of the motion of the projectiles
Company Gunnery Sergeant (ops Chief)
before range
- sets up additional training area
* Supervise ammunition, target, and administrative detail
DH/DR
change in height for a 100 meters, change in range
M910 Muzzle Velocity
1525 +/- 20 mps
