Activities 2008 - Photos
Pirates
Regatta 1 Regatta 2
Training Week
Gunn Trophy 1 Gunn Trophy 2
Yacht Race
Sailaway
Laying Up Supper
Beaufort wind force scale
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Specifications and equivalent speeds
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|
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Beaufort wind scale
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Mean Wind Speed
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Limits of wind speed
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Wind descriptive terms
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Probable wave height in metres*
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Probable maximum wave height in metres*
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Seastate
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Sea descriptive terms
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mph
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Knots
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m/s
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mph
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Knots
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m/s
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|
|
|
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0
|
0
|
0
|
0
|
<1
|
<1
|
0-0.2
|
Calm
|
-
|
-
|
0
|
Calm (glassy)
|
|
1
|
2.3
|
2
|
0.8
|
1-4
|
1-3
|
0.3-1.5
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Light air
|
0.1
|
0.1
|
1
|
Calm (rippled)
|
|
2
|
5.8
|
5
|
2.4
|
4-7
|
4-6
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1.6-3.3
|
Light breeze
|
0.2
|
0.3
|
2
|
Smooth (wavelets)
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|
3
|
10.4
|
9
|
4.3
|
8-12
|
7-10
|
3.4-5.4
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Gentle breeze
|
0.6
|
1.0
|
3
|
Slight
|
|
4
|
15
|
13
|
6.7
|
13-18
|
11-16
|
5.5-7.9
|
Moderate breeze
|
1.0
|
1.5
|
3-4
|
Slight-Moderate
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|
5
|
21.9
|
19
|
9.3
|
19-24
|
17-21
|
8.0-10.7
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Fresh breeze
|
2.0
|
2.5
|
4
|
Moderate
|
|
6
|
27.6
|
24
|
12.3
|
25-31
|
22-27
|
10.8-13.8
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Strong breeze
|
3.0
|
4.0
|
5
|
Rough
|
|
7
|
34.5
|
30
|
15.5
|
32-38
|
28-33
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13.9-17.1
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Near gale
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4.0
|
5.5
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5-6
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Rough-Very rough
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|
8
|
42.6
|
37
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18.9
|
39-46
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34-40
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17.2-20.7
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Gale
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5.5
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7.5
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6-7
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Very rough-High
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9
|
50.7
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44
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22.6
|
47-54
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41-47
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20.8-24.4
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Severe gale
|
7.0
|
10.0
|
7
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High
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|
10
|
60
|
52
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26.4
|
55-63
|
48-55
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24.5-28.4
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Storm
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9.0
|
12.5
|
8
|
Very High
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11
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69
|
60
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30.5
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64-72
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56-63
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28.5-32.6
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Violent storm
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11.5
|
16.0
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8
|
Very High
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|
12
|
|
-
|
-
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73+
|
64+
|
32.7+
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Hurricane
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14+
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-
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9
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Phenomenal
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*
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i. These values refer to well-developed wind waves of the open sea.
ii. The lag effect between the wind getting up and the sea increasing should be borne in mind
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Site Last Updated - 03/09/2010
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