Observator OMC-160-3, Руководство пользователя

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OMC-160-3
Manual Page 14
Table 4 Beaufort scale
Force
[Bft]
Speed Name Conditions at sea Conditions on land
knots m/s
0 < 1 <0.2 Calm Sea like a mirror. Smoke rises vertically.
1 1-3 0.3-1.5 Light air Ripples only. Smoke drifts and leaves rustle.
2 4-6 1.6-3.3 Light breeze Small wavelets (0.2 m). Crests
have a glassy appearance.
Wind felt on face.
3 7-10 3.4-5.5 Gentle breeze Large wavelets (0.6 m), crests
begin to break.
Flags extended, leaves move.
4 11-16 5.5-7.9 Moderate
breeze
Small waves (1 m), some
whitecaps. Dust and small branches move.
5 17-21 8.0-10.7 Fresh breeze Moderate waves (1.8 m), many
whitecaps.
Small trees begin to sway.
6 22-27 10.8-13.8 Strong breeze Large waves (3 m), probably
some spray.
Large branches move, wires
whistle, umbrellas are difficult to
control.
7 28-33 13.9-17.1 Near gale Mounting sea (4 m) with foam
blown in streaks downwind. Whole trees in motion,
inconvenience in walking.
8 34-40 17.2-20.7 Gale Moderately high waves (5.5
m), crests break into spindrift. Difficult to walk against wind.
Twigs and small branches blown
off trees.
9 41-47 20.8-24.4 Strong gale High waves (7 m), dense foam,
visibility affected.
Minor structural damage may
occur (shingles blown off roofs).
10 48-55 24.5-28.4 Storm Very high waves (9 m), heavy
sea roll, visibility impaired.
Surface generally white. Trees uprooted, structural
damage likely.
11 56-63 28.5-32.6 Violent storm Exceptionally high waves (11
m), visibility poor.
Widespread damage to
structures.
12 64+ >32.6 Hurricane 14 m waves, air filled with
foam and spray, visibility bad. Severe structural damage to
buildings, wide spread
devastation.