A.List of Lights
B.Coast Pilot
C.Sailing Directions
D.List of Radiobeacons
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A.horizontal
B.vertical
C.diagonal
D.vertical or diagonal
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
最新試題
The period at high or low tide during which there is no change in the height of the water is called the （）.
During a period of whiteout，you should expect which of the following（）.
A vessel not to impede the passage of another vessel is not relieved （） taking collision-avoiding action.
The distance between any two meridians measured along a parallel of latitude （）.
Attention is called to the fact that in many cases pipelines are not （） and charted depths may be decreased by up to 2 meters．
Clearance gauges at bridges indicate （）.
An occulting light is one in which （）.
For full information regarding the current circulation of the Indian Ocean,（） Sailing Direction,Current Atlas,etc.
Due to lapse of time the risk in these areas to surface navigation is now considered （）than the ordinary risks of navigation，but a very real risk still exists with regard to anchoring，fishing or any form of submarine or seabed activity.
A tug is to assist in docking an oceangoing vessel on a hawser. The greatest danger to the tug is （）.