A.velocity of current in knots
B.direction from which the current flows
C.estimated current
D.direction toward which the current flows
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A.reversing current
B.ebb current
C.flood current
D.slack current
A.harmonic constant
B.establishment of the port
C.half-tide level
D.tide cycle
A.North
B.South
C.East
D.West
A.stem the current and make very slow headway when the anchor is dropped
B.stem the current and be falling aft very slowly when the anchor is dropped
C.stem the current and endeavor to make neither headway nor sternway when the anchor is dropped
D.stop all headway through the water and keep the current astern when the anchor is dropped
A.period
B.range
C.distance
D.depth
最新試題
Tide is（）in direction ENE.
The tide（）.It’s 2 hours before low water，and（）your present position you will be aground at low water.
Neap tides occur only（）.
The winds with the greatest effect on the set，drift，and depth of the equatorial currents are the（）.
Priming of the tides occurs（）.
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（）.
Which statement is TRUE concerning apogean tides（）．
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（）.
The velocity of a rotary tidal current will be decreased when the Moon is（）.