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5
IT
Type of
Speed
Force
wind
(knots)
0
Calm
0 - 1
1
Light air
1 - 3
Light
2
4 - 6
breeze
Gentle
3
7 - 10
breeze
Moderate
4
11 - 16
breeze
Fresh
5
17 - 21
breeze
Strong
6
22 - 27
breeze
7
Near gale
28 - 33
8
Gale
34 - 40
Strong
9
41 - 47
gale
10
Storm
48 - 55
Violent
11
56 - 63
storm
12
Hurricane
64 +
6
All manuals and user guides at all-guides.com
MRT 1850 - 2150 - 2540
EN
BEAUFORT scale
Wind speed at a height of 10 m from flat ground
Speed
Speed
(kph)
(m/s)
0 - 1
< 0.3
smoke rises vertically
1 - 5
0.3 - 1.5
the wind bends the smoke
The wind can be felt on the
6 - 11
1.6 - 3.3
face; shakes the leaves
The wind continuously shakes
12 - 19
3.4 - 5.4
The wind raises dust and
20 - 28
5.5 - 7.9
scraps of paper; shakes the
29 - 38
8 - 10.7
Shakes thick branches, metal
39 - 49
10.8 - 13.8
wires hum; it becomes difficult
to keep an umbrella open
Whole trees sway; it is difficult
50 - 61
13.9 - 17.1
to walk against the wind
Breaks the branches of trees; it
62 - 74
17.2 - 20.7
is almost impossible to walk
Causes slight damage to
75 - 88
20.8 - 24.4
buildings (stacks, tiles, etc..).
Rare inland; uproots trees;
89 - 102
24.5 - 28.4
causes considerable damage
Very rare, causes extensive
103 - 117
28.5 - 32.6
over 118
32.7 +
Effects on Land
Sea condition
sea like a mirror
ripples but without foam
small but evident wavelets
large wavelets. Perhaps
the leaves and twigs
scattered white horses
small waves. Fairly frequent
white horses
twigs
small waves form on inland
leafy shrubs sway
waters. Moderate waves,
many white horses
large waves begin to form;
white foam crests, probably
sea heaps up and white
foam blown in streaks along
the direction of the wind
moderately high waves,
crests begin to break into
against the wind
high waves. Dense foam
along the direction of the
wind. Crests of waves begin
to roll over. Spray may affect
very high waves with long
overhanging crests. Visibility
to buildings
exceptionally high waves
that may hide medium sized
devastation
ships. Visibility affected
the air is filled with foam and
Causes very serious
spray. Sea completely white
catastrophes
with driving spray. Visibility
very seriously affected
DE
crests
spray
spindrift.
visibility
affected
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