NORTH KOREA COUNTRY HANDBOOK

WIND SPEED
COOLING POWER OF WIND EXPRESSED AS "EQUIVALENT CHILL TEMPERATURE"
KNOTS
MPH
TEMPERATURE ( o F)
CALM CALM
40 35 30 25 20 15 10 5 0 -5 -10 -15 -20 -25 -30 -35 -40 -45 -50 -55 -60
EQUIVALENT CHILL TEMPERATURE
3 - 6 5
35
30
25
20
15
10
5
0
-5
-10
-15
-20
-25
-30
-35
-40
-45
-50
-55
-60
-70
7 - 10 10
30
20
15
10
5
0
-10
-15
-20
-25
-35
-40
-45
-50
-60
-65
-70
-75
-80
-90
-95
11 - 15
15
25
15
10
0
-5
-10
-20
-25
-30
-40
-45
-50
-60
-65
-70
-80
-85
-90 -100 -105 -110
16 - 19
20
20
10
5
0
-10
-15
-25
-30
-35
-45
-50
-60
-65
-75
-80
-85
-95
-100 -110 -115 -120
20 - 23 25
15
10
0
-5
-15
-20
-30
-35
-45
-50
-60
-65
-75
-80
-90
-95 -105 -110 -120 -125 -135
24 - 28 30
10
5
0
-10
-20
-25
-30
-40
-50
-55
-65
-70
-80
-85
-95
-100 -110 -115 -125 -130 -140
29 - 32 35
10
5
-5
-10
-20
-30
-35
-40
-50
-60
-65
-75
-80
-90 -100 -105 -115 -120 -130 -135 -145
33 - 36 40
10
0
-5
-10
-20
-30
-35
-45
-55
-60
-70
-75
-85
-95 -100 -110 -115 -125 -130 -140 -150
Winds Above
40 MPH Have
Little Additional
Effect
LITTLE DANGER
INCREASING DANGER
Flesh may freeze within 1 minute
GREAT DANGER
Flesh may freeze within 30 seconds
Windchill Chart
F-13) is a simple and practical guide showing when cold weather is dangerous
and when exposed flesh is likely to freeze.
COLD WEATHER CLOTHING
Cold weather clothing systems use the design principles of insulate,
layer, and ventilate.
Insulation reduces the amount of body heat lost to the environment. By
regulating the amount of insulation, you can regulate the amount of
body heat lost.
Layering Several layers of clothing provide more insulation and flexibility
than one heavy garment, even if the heavy garment is as thick as
the combined layers. The secret is dead air space between layers. The
more dead air space, the greater the insulating value. Layers can be
F-13