A.tide is falling from high water to low water
B.tide is rising from low water to high water
C.tide is reaching to a highest level
D.tide is reaching to a lowest level
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A.depth of water at a specific time due to tidal effect
B.difference between the depth of the water and the area's tidal datum
C.difference between the depth of the water and the high water tidal level
D.difference between the depth of the water at high tide and the depth of the water at low tide
A. the angle between the horizontal and the line of sight to the visible horizon
B. index error
C. parallax
D. terrestrial refraction
A.Mean low water
B.Mean high water
C.Average water level
D.Geographical sea level
A.the time of day
B.the seasons
C.geography
D.All of the above
A.sphere
B.oblate spheroid
C.spheroid of revolution
D.oblate eggoid
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The meaning of ebb tide is that （）.
A vessel is entering port A for the first time and has a Pilot conning the vessel. The Master is unsure that the Pilot is taking sufficient action to prevent a collision. What should the Master do（）.
Areas enclosed by a long and short dashed magenta line indicate （）.
The height of eye correction is smaller than geometrical dip because of （）.
A tug is to assist in docking an oceangoing vessel on a hawser. The greatest danger to the tug is （）.
The Earth has the shape of a(n) （）.
For full information regarding the current circulation of the Indian Ocean,（） Sailing Direction,Current Atlas,etc.
The period at high or low tide during which there is no change in the height of the water is called the （）.
Clearance gauges at bridges indicate （）.
During a period of whiteout，you should expect which of the following（）.