A.at apogee
B.new
C.full
D.All of the above
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A.one flowing in the same direction as your course steered
B.one flowing in the opposite direction as your course steered
C.one that flows at nearly right angles to your course steered
D.a rotary current in which the direction of current flow constantly changes
A.temperature and salinity differences in the water
B.wind and density differences in the water
C.water depth and underwater topography
D.rotation of the Earth and continental interference
A.black
B.setting
C.being
D.having
A.falls／in
B.has been falling／on
C.has fallen／at
D.is falling／in
A.is flowing towards the land
B.is moving towards the ocean
C.level is not changing
D.level is rising because of heavy rains
最新試題
You are docking a vessel．Wind and current are most favorable when they are（）.
Neap tides occur only（）.
The tide（）.It’s 2 hours before low water，and（）your present position you will be aground at low water.
Tides are superimposed on nontidal rising and falling water levels，caused by（）．
When daylight savings time is kept，the time of tide and current calculations must be adjusted.One way of doing this is to（）.
The velocity of a rotary tidal current will be decreased when the Moon is（）.
Which statement is TRUE concerning equatorial tides（）.
Stand of the tide is that time when（）.
Tide is（）in direction ENE.
Water may boil up around the stern of a vessel in a channel due to（）.