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|  MIL-D-70789A (AR)
6.8.1.4 Mission oriented Protective posture; level 4
(MOPP4). MOPP4 is a flexible system of protection against
chemical agents which is used in chemical warfare to facilitate
mission accomplishment. The soldier is required to wear
individual protective equipment consistent with chemical threat.
Level four requires the following protective equipment:
fatigues, chemical protective overgarment or liner ensemble,
protective mask, hood, gloves overboots and bOdy armor. Use of
this equipment is discussed in FM 3-4.
6.8.2
Error Parameters.
6.8.2.1 Circular error Probable (CEP). CEP is the radius
of a circle, centered about true, such that any measured
position, selected from the total sample population, has a 50
percent probability of lying inside the circle. CEP shall be
computed as follows:
1.1774
RMs
+
RMse
CEP =
n
2
Where:
RMS and RMS are the RMS errors in Northing and Easting,
respectively.
6.8.2.2 Radial error. Radial error is the linear
difference in horizontal position between the
measured reference values for a single position measurement.
Radial Error =
Where:
m and m are
the
measured
Easting
and
Northing,
respectively.
m and m are
the
reference
Easting
and
Northing.
respectively.
139
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