NBC 3 CHEM
A. 002
D. 010903Z
F. 32V UC250010 UTM ACTUAL
NAV NBC 3 CHEM
EXPLANATION
A. 002
A: Strike serial number (optional).
D. 010903Z
D: UTC date-time of attack.
F.
240005N 0961321W DMS F:
Location of attack, estimated or actual.
ACTUAL
G. MISSILE
H. NERVE, P, GROUND BURST
PA. UC248020
UC240015
UC240005
UC300900
U C 3 7 0 0 2 0 U T M
G. MISSILE
G: Type of attack (aircraft. bomb, missile
etc.)
H. NERVE, NP, 200 FT
H: Type of agent, persistent (P) or Non-
persistent (NP), and height of burst.
PA. 240105N 0961321W, TO PA: Hazard area (military grid) or coordinates
234005N 0955721W, TO
of outline of hazard area.
234005N 0962921W DMS
PB. ATTACK AREA 2-4 DAYS HAZARD
PB. ATTACK AREA 1 DAY
PB: Duration of hazard in days.
AREA 1-2 DAYS
HAZARD AREA 1 DAY
Y. 0120 DEG AT 008 KMH
Y. 0360 DEG 12 KNOTS
Y: Chemical downwind direction (4 digits in
degrees or mils) and wind speed (kmh or
knots).
ZA. 315962
ZA. 315962
ZA: Weather conditions used in evaluation of
ZB. TYPE ALPHA CASE B
conditions in format bTTUwn
ZB. TYPE BRAVO, CASE ALPHA
MAX DHD 20 NM HSA 35 ZB: Type and case of chemical attack, max
MAX DHD 010 KM
DEG
DHD, and HSA.
ZA. WEATHER CONDITION CODES in format bTTUwn:
b
is the air stability code:
w
is the significant weather code:
1 = very unstable
0 for no significant weather,
2 = unstable
3 for blowing snow, sand, or dust,
3 = slightly unstable
4 for haze or fog (vsby <4,000 meters),
4 = neutral
5 for drizzle,
5 = slightly stable
6 for rain,
6 = stable
7 for snow or mixed snow/rain,
7 = very stable
8 for showers (rain, snow, or mixed),
9 for thunderstorms, with or without precip,
S for elevated inversion layer.
TT is the air temperature in whole °C.
Add 50 to negative temperatures.
n
is the cloud coverage:
(-10°C = 60)
0 for clear, scattered or few.
1 for broken.
U is the tens-value of the relative humidity.
2 for overcast.
ZB. ATTACK TYPES AND CASES:
Type A: Air contaminating Agent
Case a: Winds 5 knots (10 KM/H) or less.
Case b: Winds more than 5 knots (10 KM/H).
Type B: Ground Contaminating Agent.
Case a: Contamination within 1/2 nm radius circle.
Case b: Contamination covers area radius between 1/2 nm and 1 nm.
Case c: Contamination covers area greater than 1 nm in any direction.
Figure 5-10.—Chemical downwind message. Contents and explanation of an NBC 3 CHEM (ground forces) and in NAV NBC 3 CHEM (Naval
Forces).
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