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2384.01 -2020
BEAUFORT Wind Scale and Corresponding State of the Sea, After Few Hours of Wind, Away From the Coast.
Boat Design Categories (Directive 2013/53/EU):
NOTE:
The significant wave height
is the mean height of the highest one-third of the waves, which approximately
corresponds to the wave height estimated by an experienced observed. Some waves will be double this height.
State of the sea
Force
Denomination
Knots
Km/h
m/sec
and wave height in meters
0
Calm
<1
<1
0-0.2
Calm
0
1
Light Air
1-3
1-5
0.3-1.5
Calm
0
2
Light Breeze
4-6
6-11
1.6-3.3
Almost calm
0.2
3
Gentle Breez
7-10
12-19
3.4-5.4
Almost calm
0.2
4
Moderate Breeze
11-16
20-28
5.5-7.9
Small waves
0.5
5
Strong Breeze
17-21
29-38
8.0-10.7
Large waves
1.25
6
Fresh Wind
22-27
39-49
10.8-13.8
Large waves
2.0
7
Strong Wind
28-33
50-61
13.9-17.1
Very large waves
2.5
8
Gale
34-40
62-74
17.2-20.7
Rough sea
4
9
Strong Gale
41-47
75-88
20.8-24.4
Very rough sea
6
10
Storm
48-55
89-102
24.5-28.4
Heavy
9
11
Violent Storm
56-63
103-117
28.5-32.6
Very heavy
14
12
Hurricane
64 and over
118 and over
32.7and over
Stormy
14 and over
Design category
"A" - "Ocean"
"B"- "Offshore"
"C"- "Inshore"
"D"- "Sheltered waters"
Wind force
(Beaufort scale)
exceeding 8
up to,and including, 8
up to,and including, 6
up to,and including, 4
Significant wave height
exceeding 4
up to,and including, 4
up to,and including, 2
up to,and including, 0.3
