— 8 — BRIG
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 observer. Some waves will be double this height.
State of the sea
Fo rce De nominati o n Knots K m / h m / s e c 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 Breeze 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 W ind 22-27 39-49 10.8-13.8 Large waves 2.0
7 Strong W ind 28-33 50-61 13.9-17.1 Ver y 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
1 0 Storm 48-55 89-102 24.5-28.4 H eavy 9
1 1 Violent Storm 56-63 103- 117 28.5-32.6 Very heavy 1 4
1 2 Hur ricane 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
(Beaufor t scale)
exceeding 8
up to,and including, 8
up to,and including, 6
up to,and including, 4
Significant wav e height
exceeding 4
up to,and including, 4
up to,and including, 2
up to,and including, 0.3
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