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
What benefit is a weather bulletin to a mariner（）.
The Beaufort scale is used to estimate the（）.
Which of the following statements concerning frontal movements is TRUE（）.
When steering on autopilot which of the following input conditions may NOT have an effect on the control of the steering gear（）.
The area of strong westerly winds occurring between 40°S and 60°S latitude is called the（）.
Of the following，（）is not a wind.
Weather observations provided by each weather station include all of the following except（）.
Weather forecast messages are usually（）.
Weather conditions in the middle latitudes generally move（）．
If the center of low pressure is due west of you in the Northern Hemisphere，which wind direction should you expect（）.