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
When your vessel is on or near the path of an approaching tropical storm the（）.
When a tornado moves over the water from land it is called a（）.
Which type of precipitation is a product of the violent convection found in thunderstorms（）.
The direction of prevailing winds in the Northern hemisphere is caused by the（）.
Two well-developed high pressure areas may be separated by a（）.
What kind of conditions would you observe as the eye of a storm passes over your ship’s position（）.
The doldrums are characterized by（）.
What is the first visible indication of the presence of a tropical cyclone or hurricane（）.
When experiencing heavy winds，you should reef sails to（）.
If you observe the point of cloud convergence shifting to the right and the “bar”of the storm appears to move along the horizon（）.