A.Wall cloud
B.Nimbostratus cloud
C.Bar
D.Funnel
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A.Spiral rainbands
B.Cloud walls
C.Funnel clouds
D.Cyclonic spirals
A.Wind direction
B.Percentage of cloud cover
C.Wind speed
D.Barometric pressure
A.polar easterlies
B.prevailing westerlies
C.roaring forties
D.jet streams
A.Sailing plans to be sent before departure
B.More frequent reports in heavy weather
C.Arrival reports to be sent within 8 hours of arrival
D.A position report within 24 hours of departure
A.Bora
B.Gust
C.Gregale
D.Floe
最新試題
Of the following，（）is not a wind.
Mechanical lifting of air by the upslope slant of the terrain is called（）.
Weather conditions in the middle latitudes generally move（）．
If your weather bulletin shows the center of a low pressure area to be 100 miles due east of your position，what winds can you expect in the Northern Hemisphere?（）.
Widely spaced isobars on a weather map indicate（）.
After a cold front passes，the barometric pressure（）.
Of the following，（）is not a wind．
When a high pressure system is centered north of your vessel in the Northern Hemisphere（）.
When steering on autopilot which of the following input conditions may NOT have an effect on the control of the steering gear（）.
The Beaufort scale is used to estimate the（）.