A.Effect of the moon's gravity
B.Fetch
C.Wind velocity
D.Length of time a wind has been blowing
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A.adverse currents for practically the entire crossing
B.favorable currents for practically the entire crossing
C.favorable currents in the summer months and adverse currents in the winter months
D.variable currents having no significant effect on the total steaming time
A.vary
B.variable
C.variably
D.variability
A.vertical movement of the water
B.horizontal movement of the water
C.density changes in the water
D.None of the above
A.dike
B.revetment
C.cutoff
D.crib
A.directional current
B.forward current
C.propeller current
D.wake current
最新試題
The speed of an ocean current is dependent on（）.
Neap tides occur（）.
The type of current which will have the greatest effect on the course made good for your vessel is（）.
（）is not a type of tide.
Neap tides occur when the（）.
Which current would you encounter on a direct passage from southern Africa to Argentina，South America（）.
You are docking a vessel．Wind and current are most favorable when they are（）.
Which current is responsible for the movement of icebergs into the North Atlantic shipping lanes（）.
When there are small differences between the heights of two successive high tides or two successive low tides，the tides are called（）.
The steady current circling the globe at about 60°S is the（）.