A.predicted in Tidal Current Tables
B.unpredictable
C.generally constant
D.generally too weak to be of concern
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A.at apogee
B.new
C.full
D.All of the above
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
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（）is not a type of tide.
A wave entering（）is likely to produce bores．
The velocity of the current in large coastal harbors is（）.
Tides are superimposed on nontidal rising and falling water levels，caused by（）．
The winds with the greatest effect on the set，drift，and depth of the equatorial currents are the（）.
Water may boil up around the stern of a vessel in a channel due to（）.
The two most effective generating forces of surface ocean currents are（）.
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（）.
You are docking a vessel．Wind and current are most favorable when they are（）.
Tide is（）in direction ENE.