A.high pressures
B.low pressures
C.weak pressures
D.strong pressures
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A.check it with a barometer on another vessel
B.take readings from several barometers and average them
C.check it with the barometer at the ship chandlery
D.check it against radio or National Weather Service reports of the immediate vicinity
A.a certain area
B.all ocean areas
C.some areas
D.important areas
A.distance a wave travels between formation and decay
B.stretch of water over which a wave-forming wind blows
C.time in seconds required for two crests to pass a given point
D.measurement of a wave's steepness
A.Upwind
B.Downwind
C.Crosswind
D.Downcurrent
A.short confused swells
B.gradually increasing white clouds (mare's tails)
C.pumping barometer
D.continuous fine mist-like rain
最新試題
In the Northern Hemisphere，the right half of the storm is known as the dangerous semicircle because（）.
In the relatively calm area near the hurricane center，the seas are（）.
You have determined that you are in the right semicircle of a tropical cyclone in the Northern Hemisphere.What action should you take to avoid the storm（）.
In the Northern Hemisphere a wind is said to veer when the wind（）.
Which condition suggests that your present position lies in the navigable semicircle of a tropical storm（）.
Which type of precipitation is a product of the violent convection found in thunderstorms（）.
Steady precipitation is typical of（）．
If you observe the point of cloud convergence shifting to the right and the “bar”of the storm appears to move along the horizon（）.
In the Northern Hemisphere，when the wind at your location is northerly，the low pressure center causing the wind is located to your（）.
In the Northern Hemisphere，an observer at point II in the weather system should experience a wind shift from the（）.