A.SEMIDIURNAL
B.DIURNAL
C.MIXED
D.OSCILLATING
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A.slack water when upbound
B.shallow water
C.a cross current
D.a head current
A.Moon being at its maximum declination
B.Moon crossing the equator
C.Sun and Moon both being near 0°declination
D.Moon being at perigee
A.One hour after the predicted time
B.At the predicted time
C.30 minutes before flood，one hour after an ebb
D.30 minutes before the predicted time
A.getting
B.setting
C.being
D.having
A.doldrums
B.horse latitudes
C.trade winds
D.prevailing westerlies
最新試題
The tide（）.It’s 2 hours before low water，and（）your present position you will be aground at low water.
The velocity of the wind，its steady direction，and the amount of time it has blown determines a wind driven current’s（）.
Which current would you encounter on a direct passage from London，England，to Capetown，South Africa（）.
You are docking a vessel．Wind and current are most favorable when they are（）.
Which statement is TRUE concerning apogean tides（）．
Which current would you encounter on a direct passage from southern Africa to Argentina，South America（）.
A wave entering（）is likely to produce bores．
Water may boil up around the stern of a vessel in a channel due to（）.
The speed of an ocean current is dependent on（）.
The two most effective generating forces of surface ocean currents are（）.