单项选择题
A.east B.northeast C.southwest D.west
The navigational term SET OF CURRENT means（）.A.velocity...
单项选择题The navigational term SET OF CURRENT means（）.
A.velocity of current in knots B.direction from which the current flows C.estimated current D.direction toward which the current flows
The movement of water away from the shore or downstream...
单项选择题The movement of water away from the shore or downstream is called a(n)（）.
A.reversing current B.ebb current C.flood current D.slack current
The interval of the average elapsed time from the merid...
单项选择题The interval of the average elapsed time from the meridian transit of the moon until the next high tide is called the（）.
A.harmonic constant B.establishment of the port C.half-tide level D.tide cycle
