Manitou MRT EASY Notice D'utilisation page 31

IT
To visually recognise this wind speed, refer to the empirical wind evaluation scale below:
Speed
Force Type of wind
(knots)
0 Calm 0 - 1
1 Light air 1 - 3
2 Light breeze 4 - 6
3 Gentle breeze 7 - 10
4 Moderate breeze 11 - 16
5 17 - 21
Fresh breeze
6 Strong breeze 22 - 27
7 28 - 33
Near gale
8 Gale 34 - 40
9 41 - 47
Strong gale
10 Storm 48 - 55
11 Violent storm 56 - 63
12 Hurricane 64 +
It is strictly forbidden to use the platform when the wind speed exceeds 45 km/h.
BEAUFORT scale (wind speed at a height of 10 m on a flat site)
Speed Speed
(km/h) (m/s)
0 - 1 < 0,3
Smoke rises vertically.
1 - 5 0,3 - 1,5
Smoke indicates direction of wind.
6 - 11 1,6 - 3,3
Wind felt on face, leaves rustle.
Leaves and small twigs in constant
12 - 19 3,4 - 5,4
motion.
Wind raises dust and loose pieces of
20 - 28 5,5 - 7,9
paper; small branches are moved.
29 - 38 8 - 10,7
Small tees in leaf begin to sway.
Large branches in motion, whistling heard
39 - 49 10,8 - 13,8 in overhead wires, umbrella use becomes
difficult.
Whole trees in motion, inconvenience felt
50 - 61 13,9 - 17,1
when walking against the wind.
Wind breaks twigs off trees; impedes
62 - 74 17,2 - 20,7
progress.
Wind damages roofs (chimneys, slates,
75 - 88 20,8 - 24,4
etc.).
Seldom experienced inland; trees upro-
89 - 102 24,5 - 28,4 oted; considerable structural damage
occurs.
103 - 117 28,5 - 32,6
Very rare, widespread damage.
118 + 32,7 +
Devastating damage.
US
Effects on Land
1-7
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FR
Sea conditions
Sea is like a mirror.
Ripples with appearance of scale,
no foam crests.
Short wavelets, but pronounced.
Very small waves, crests begin to
break.
Small waves, becoming longer,
numerous whitecaps.
Wavelets form on inland waters;
moderate waves, taking longer
form.
Larger waves forming, whitecaps
everywhere, some spray.
Sea heaps up; white foam from
breaking waves begins to be blown
in streaks along the direction of
the wind.
Moderately high waves of greater
length; edges of crests begin to
break into spindrift.
High waves, crests of waves begin
to topple, streaks of foam; reduced
visibility.
Very high waves; white streaks of
foam; reduced visibility.
Exceptionally high waves able to
hide medium sized ships from view,
reduced visibility.
Sea completely white; air filled
with foam and spray, very reduced
visibility.