A.January
B.April
C.August
D.October
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A.Effect of the moon's gravity
B.Fetch
C.Wind velocity
D.Length of time a wind has been blowing
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
最新試題
The velocity of the wind，its steady direction，and the amount of time it has blown determines a wind driven current’s（）.
Water may boil up around the stern of a vessel in a channel due to（）.
The speed of an ocean current is dependent on（）.
Spring tides are tides that（）.
（）is not a type of tide.
To make sure of getting the full advantage of a favorable current，you should reach an entrance or strait at what time in relation to the predicted time of the favorable current?（）
The type of current which will have the greatest effect on the course made good for your vessel is（）.
A wave entering（）is likely to produce bores．
Neap tides occur when the（）.
You are docking a vessel．Wind and current are most favorable when they are（）.