A.horizontal
B.vertical
C.diagonal
D.vertical or diagonal
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A.watch
B.look for
C.see
D.regard
A.west in west longitude and east in east longitude
B.east in west longitude and west in east longitude
C.west
D.east
A.Snowfall or blowing snow
B.Lack of ability to estimate distance
C.Harsh contrast between sun-illuminated snow cover and the background
D.Hazy horizons with extensive mirage effects
A.more serious
B.not less serious
C.more dangerous
D.no more dangerous
A.low water slack
B.high water slack
C.high water ebb
D.high water flood
最新試題
The distance between any two meridians measured along a parallel of latitude and expressed in miles is the （）.
Above-normal tides near the center of a hurricane maybe caused by the （）.
The distance between any two meridians measured along a parallel of latitude （）.
The height of eye correction is smaller than geometrical dip because of （）.
An occulting light is one in which （）.
Attention is called to the fact that in many cases charted depths may be decreased by up to （）.
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（）.
The distance between the surface of the water and the tidal datum is the （）.
For full information regarding the current circulation of the Indian Ocean,（） Sailing Direction,Current Atlas,etc.
The height of tide is the （）.