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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The cold ocean current which meets the warm Gulf Stream between latitudes 40°and 43°N to form the cold wall is called the（）.
Radiation fog（）.
In the Northern Hemisphere，a wind that shifts counterclockwise is a（）.
Steam fog is most likely to occur on the Mississippi and Ohio Rivers in（）.
Low pressure disturbances，which travel along the intertropical convergence zone，are called（）.
The direction of the surface wind is（）.
The horse latitudes are characterized by（）.
The largest waves (heaviest chop) will usually develop where the wind blows（）.
In the Northern Hemisphere you are caught in the dangerous semicircle with plenty of sea room available. The best course of action is to bring the wind on the（）.
In a tropical cyclone，in the Northern Hemisphere，a vessel hove to with the wind shifting counterclockwise is（）.