A.at high vessel speeds
B.at low vessel speeds
C.in shallow water
D.in deep water
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A.small whirlpool
B.smooth patch of water
C.V-shaped ripple with the point of the V pointing downstream
D.V-shaped ripple with the point of the V pointing upstream
A.is generated by waves striking the beach
B.flows outside the surf zone
C.flows in a circular pattern
D.is also known as a longshore current
A.a current setting your vessel on the wall
B.a current setting into the lock chamber
C.an eddy working along the lower guide wall
D.a current setting counterclockwise
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Cold water flowing southward through the western part of the Bering Strait between Alaska and Siberia is joined by water circulating counterclockwise in the Bering Sea to form the（）.
In most cases，the direction of the apparent wind lies between the bow and（）.
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（）.
The largest waves (heaviest chop) will usually develop where the wind blows（）.
The direction of the southeast trade winds is a result of the（）.
The drift and set of tidal，river，and ocean currents refer to the（）.
Radiation fog（）.
Advection fog holds longest over which portions of the lakes?（）
A tide is called diurnal when（）.
Ocean currents are well defined and（）.