Harbours
- North — North wind (Boreas)
- North North-East — North-East wind
- North-East — North-East wind
- East North-East — East wind
- East wind
- East South-East — East Sirocco wind
- South-East — Sirocco
- South South-East — South Sirocco wind
|
- South — South wind
- South South-West — South South-West wind
- South-West — South-West wind
- West South-West — West South-West wind
- West — (Zephyr) (West wind)
- West North-West — West North-West wind
- North-West — North-West wind
- North North-West — North North-West wind
|
Beaufort scale
Beaufort
Degree |
Type of
wind |
Wind speed |
Characters |
| knots |
m/sec |
| 0 |
Dead calm |
1 |
0 ¸ 0.2 |
the smoke rises vertically; the sea is one mirror |
| 1 |
Breath of wind |
1 ¸ 3 |
0.3 ¸ 1.5 |
the wind turns aside the smoke; ripples of the water |
| 2 |
Light breeze |
4 ¸ 6 |
1.6 ¸ 3.3 |
the leaves move; small but obvious waves |
| 3 |
Stiff breeze |
7 ¸ 10 |
3.4 ¸ 5.4 |
constantly churned leaves and twigs; small waves,crests that begin to break |
| 4 |
Moderate wind |
11 ¸ 16 |
5.5 ¸ 7.9 |
the wind raises powder, leaves sand banks, the coppers is churned; small waves that become longer |
| 5 |
Stiff wind |
17 ¸ 21 |
8.0 ¸ 10.7 |
the shrubs with leaves oscillate; small are formed waves in inner waters; lengthened moderate waves |
| 6 |
Fresh wind |
22 ¸ 27 |
10.8 ¸ 13.8 |
great churned, hissing sound between coppers the telegraphic wires; billow with white foam crests are formed, and sprays |
| 7 |
Strong wind |
28 ¸ 33 |
13.9 ¸ 17.1 |
entire churned trees, difficulty to walk against wind; the sea is large, the foam begins to being frayed in wakes |
| 8 |
Gale |
34 ¸ 40 |
17.2 ¸ 20.7 |
broken coppers, to walk against wind are impossible; lengthened billow of medium height and more, from the crests they detach whirlwinds of sprays |
| 9 |
Strong gale |
41 ¸ 47 |
20.8 ¸ 24.4 |
removed fireplaces and tiles; large big waves, thick wakes of foam and sprays, raised from the wind, reduce the visibility |
| 10 |
Storm |
48 ¸ 55 |
24.5 ¸ 28.4 |
rare in mainland, trees uprooted, serious damages to the rooms; enormous big waves with long crests to spandrel |
| 11 |
Strong storm |
56 ¸ 63 |
28.5 ¸ 32.6 |
rare, most serious devastations; enormous and high waves, that they can hide ships of medium tonnage; reduced visibility |
| 12 |
Hurricane |
64 + |
32.7 + |
destruction of buildings, manufactured, etc; in sea the foam and the sprays reduce the visibility much |
The speed of the wind is measured with the anemometer, and express in km/h and is suitable from the scale of Beaufort, that takes the name from the admiral British Francis Beaufort (Navam 1774-1857) employed to the service idro-graphic. He in the 1806 proposed a scale for the classification of the strength, that came then adopted from the British admiralty in the 1838 and in succession at 1874 o'clock from the rest of the world.
Douglas scale
| Description |
Waves average height in metres |
| 0 |
Calm (glassy) |
0 |
| 1 |
Calm (rippled) |
0 - 0,10 |
| 2 |
Smooth |
0,10 - 0,50 |
| 3 |
Slight |
0,50 - 1,25 |
| 4 |
Moderate |
1,25 - 2,50 |
| 5 |
Rough |
2,50 - 4 |
| 6 |
Very rough |
4 - 6 |
| 7 |
High |
6 - 9 |
| 8 |
Very high |
9 - 14,00 |
| 9 |
Phenomenal |
over 14 |
Harbours
Harbours
