A.by
B.with
C.on
D.in
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A.Northwesterly
B.Southwesterly
C.Southerly
D.Northerly
A.when the wind is against you
B.with the current setting against you
C.at slack water
D.with a cross current
A.SW'ly direction along the NW coast of Africa
B.S'ly direction off the East Coast of Australia
C.NW'ly direction along the SW coast of Africa
D.SW'ly direction along the SE coast of Greenland
A.fetch
B.distant winds
C.local storms
D.the pull of the moon
A.the vertical rise or fall of the tide has stopped
B.slack water occurs
C.tidal current is at a maximum
D.the actual depth of the water equals the charted depth
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The term flood current refers to that time when the water（）.
The velocity of the wind，its steady direction，and the amount of time it has blown determines a wind driven current’s（）.
Priming of the tides occurs（）.
The steady current circling the globe at about 60°S is the（）.
The velocity of the current in large coastal harbors is（）.
The Benguela Current flows in a（）.
The two most effective generating forces of surface ocean currents are（）.
The tide（）.It’s 2 hours before low water，and（）your present position you will be aground at low water.
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（）.