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
最新試題
In Admiralty Sailing Directions，bands is the word used to indicate（）marking．
The distance from the still water level (corrected for tides and storm surge) to the bottom of the hull of a ship is the（）.
The distance between the surface of the water and the tidal datum is the （）.
A pilot vessel on pilotage duty shall show identity lights （）.
A vessel not to impede the passage of another vessel is not relieved （） taking collision-avoiding action.
Above-normal tides near the center of a hurricane maybe caused by the （）.
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（）.
For full information regarding the current circulation of the Indian Ocean,（） Sailing Direction,Current Atlas,etc.
Conditions for crossing a rough bar are usually best at （）.
The distance between any two meridians measured along a parallel of latitude （）.