— 8 — "BRIG" inflatable boats
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 observer. 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 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 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
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