A.slack water when upbound
B.shallow water
C.a cross current
D.a head current
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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
A.temperature
B.density
C.deflection
D.speed
最新試題
The Benguela Current flows in a（）.
Stand of the tide is that time when（）.
The winds with the greatest effect on the set，drift，and depth of the equatorial currents are the（）.
Priming of the tides occurs（）.
The velocity of the wind，its steady direction，and the amount of time it has blown determines a wind driven current’s（）.
When daylight savings time is kept，the time of tide and current calculations must be adjusted.One way of doing this is to（）.
The type of current which will have the greatest effect on the course made good for your vessel is（）.
Spring tides are tides that（）.
Which current would you encounter on a direct passage from southern Africa to Argentina，South America（）.
River currents tend to（）.