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
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You are anchoring in a river where the current is from one direction only.The best way to lay out two anchors is to have them（）.
When daylight savings time is kept，the time of tide and current calculations must be adjusted.One way of doing this is to（）.
Neap tides occur when the（）.
The speed of an ocean current is dependent on（）.
The type of current which will have the greatest effect on the course made good for your vessel is（）.
When there are small differences between the heights of two successive high tides or two successive low tides，the tides are called（）.
Spring tides are tides that（）.
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（）.
The velocity of the current in large coastal harbors is（）.