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Beaufort windscale презентация
Содержание
- 1. Beaufort windscale
- 2. Sea is like a mirror.
- 3. Ripples with the appearance of scales are formed, but without foam crests.
- 4. Small wavelets, still short but more pronounced; crests have glassy appearance and do not break.
- 5. Large wavelets; crests begin to break; foam of glassy appearance; perhaps scattered white horses.
- 6. Small waves, becoming longer; fairly frequent white horses.
- 7. Moderate waves, taking a more pronounced long
- 9. Spray ..........
- 10. Large waves begin to form; the white
- 11. FORCE 7: NEAR GALE MEAN WIND SPEED:
- 13. FORCE 8: GALE MEAN WIND SPEED: 34
- 14. FORCE 9: STRONG GALE MEAN WIND SPEED:
- 16. Very high waves with long overhanging crests;
- 18. Exceptionally high waves (small and medium sized
- 19. FORCE 12: HURRICANE MEAN
Sea is like a mirror.
Слайд 4Small wavelets, still short but more pronounced;
crests have glassy appearance and
do not break.
Слайд 5Large wavelets; crests begin to break; foam of
glassy appearance; perhaps scattered
white horses.
Слайд 7Moderate waves, taking a more pronounced long form;
many white horses are
formed (chance of some spray).
Слайд 10Large waves begin to form; the white foam crests are
more extensive
everywhere (probably some spray).
Слайд 11FORCE 7: NEAR GALE
MEAN WIND SPEED: 28 - 33 KNOTS
The sea
heaps up and white foam from breaking waves
begins to be blown in streaks along the direction of
the wind.
begins to be blown in streaks along the direction of
the wind.
Слайд 13FORCE 8: GALE
MEAN WIND SPEED: 34 - 40 KNOTS
Moderately high waves
of greater length; edges of
the crests begin to break into spindrift; foam is blown in
well-marked streaks along the direction of the wind.
the crests begin to break into spindrift; foam is blown in
well-marked streaks along the direction of the wind.
Слайд 14FORCE 9: STRONG GALE
MEAN WIND SPEED: 41 - 47 KNOTS
High waves;
dense streaks of foam along the direction
of the wind; crests of waves begin to topple, tumble
and roll over; spray may affect visibility.
of the wind; crests of waves begin to topple, tumble
and roll over; spray may affect visibility.
Слайд 16Very high waves with long overhanging crests; foam in great patches
is blown in dense white streaks along the direction of the wind;
the surface of the sea takes a white appearance; the tumbling of
the sea becomes heavy and shocklike; visibility affected.
Слайд 18Exceptionally high waves (small and medium sized ships
might be lost to
view behind the waves); sea completely covered with long white patches of foam lying along the direction of the wind; everywhere the edges of the wave crests are blown into froth; visibility affected.
VIDEO
(click)
Phenominal
waves!!
Слайд 19
FORCE 12: HURRICANE
MEAN WIND SPEED: 64 KNOTS AND OVER
The air
is filled with foam and spray; sea completely
white with driving spray; visibility very seriously affected.
white with driving spray; visibility very seriously affected.
Слайд 20
FORCE 12:
Saffir/Simpson Scale - categories and damage.
Saffir/Simpson Scale - categories and damage.
Category 1: 64 - 83 knots
Damage: minimal.
Category 2 : 84 - 96 knots
Damage: moderate.
Category 3 : 97 - 113 knots
Damage: extensive.
Category 4 : 114 - 135 knots
Damage: extreme.
Category 5 : >136 knots
Damage: catastrophic.
