A.Change direction in a clockwise manner in the Northern Hemisphere
B.Circulate about a low pressure center in a counterclockwise manner in the Northern Hemisphere
C.Vary in strength constantly and unpredictably
D.Circulate about a high pressure center in a clockwise manner in the Southern Hemisphere
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A.It provides a legal reason to cancel a projected voyage
B.It allows the mariner to make long term weather forecasts
C.It is of little benefit since the weather changes frequently and rapidly
D.It gives the mariner time to prepare for weather changes
A.windy showers
B.showers with winds
C.wintry showers
D.showery winds
A.temperature
B.visibility
C.predicted weather for the next twelve hours
D.barometric pressure and change in the last three hours
A.Commercial radio broadcasts
B.The Coast Guard on scheduled marine information broadcasts
C.VHF-FM continuous marine weather broadcasts provided by the National Weather Service
D.All of the above
A.Given only to TV stations
B.Transmitted only by commercial broadcast stations
C.Broadcast in plain language
D.Broadcast immediately on VHF Channel 16 and 2182 kHz
最新試題
If a weather bulletin shows the center of a low pressure system to be 100 miles due east of you，what winds can you expect in the Southern Hemisphere?（）.
In Beaufort Scale，the wind force 7 with speed of 28-33 knots is defined as（）.
The winds you would expect to encounter in the North Atlantic between latitudes 5° and 30° are known as the（）.
Gale warnings are usually issued when winds of（）8-9 are expected．
Widely spaced isobars on a weather map indicate（）.
When a high pressure system is centered north of your vessel in the Northern Hemisphere（）.
Weather observations provided by each weather station include all of the following except（）.
Of the following，（）is not a wind.
When steering on autopilot which of the following input conditions may NOT have an effect on the control of the steering gear（）.
Which of the following is not a frontal term（）.