A.from the still water plane to the crest
B.from the still water plane to the trough
C.from crest to trough
D.between water levels at one-quarter of the wave's length
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A.navigable semicircle
B.dangerous semicircle
C.low pressure area
D.eye of the storm
A.position and area of the current
B.speed and direction toward which the current flows
C.type and characteristic of the current's flow
D.None of the above
A.directly from high pressure toward low pressure
B.directly from low pressure toward high pressure
C.from high pressure toward low pressure deflected by the earth's rotation
D.from low pressure toward high pressure deflected by the earth's rotation
A.equatorial current
B.humidity
C.rotation of the earth
D.change of seasons
A.from
B.on
C.in
D.of
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In the Northern Hemisphere，your vessel is believed to be in the direct path of a hurricane，and plenty of sea room is available. The best course of action is to bring the wind on the（）.
Radiation fog（）.
The presence of stratus clouds and a dying wind will usually result in（）.
On the pole side of the trade wind belt，there is an area of high pressure with weak pressure gradients and light，variable winds. This area is called the（）.
Ocean currents are well defined and（）.
The edge of a hurricane has overtaken your vessel in the Gulf of Mexico，and the northwest wind of a few hours ago has shifted to the west. This is an indication that you are located in the（）.
Advection fog holds longest over which portions of the lakes?（）
Steam fog is most likely to occur on the Mississippi and Ohio Rivers in（）.
The ocean bottom that extends from the shoreline out to an area where there is a marked change in slope to a greater depth is the（）.
In mid-ocean，the characteristics of a wave are determined by three factors. What is NOT one of these factors?（）.