2381.01-2003
— 7 —
BEAUFORT Wind Scale and Corresponding State of the Sea, After Few Hours of Wind, Away From the Coast.
Boat Design Categories (Directive 2003/44/EC):
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.
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
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
