A.Northwesterly
B.Southwesterly
C.Southerly
D.Northerly
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A.when the wind is against you
B.with the current setting against you
C.at slack water
D.with a cross current
A.SW'ly direction along the NW coast of Africa
B.S'ly direction off the East Coast of Australia
C.NW'ly direction along the SW coast of Africa
D.SW'ly direction along the SE coast of Greenland
A.fetch
B.distant winds
C.local storms
D.the pull of the moon
A.the vertical rise or fall of the tide has stopped
B.slack water occurs
C.tidal current is at a maximum
D.the actual depth of the water equals the charted depth
A.when the moon is new or full
B.when the moon and sun have declination of the same name
C.only when the moon and sun are on the same sides of the earth
D.at the beginning of spring when the sun is over the equator
最新試題
Tropic tides are caused by the（）.
Which current would you encounter on a direct passage from southern Africa to Argentina，South America（）.
The steady current circling the globe at about 60°S is the（）.
The two most effective generating forces of surface ocean currents are（）.
A wave entering（）is likely to produce bores．
When there are small differences between the heights of two successive high tides or two successive low tides，the tides are called（）.
Tides are superimposed on nontidal rising and falling water levels，caused by（）．
The type of current which will have the greatest effect on the course made good for your vessel is（）.
Water may boil up around the stern of a vessel in a channel due to（）.
Tide is（）in direction ENE.