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 distance from the still water level (corrected for tides and storm surge) to the bottom of the hull of a ship is the（）.
A pilot vessel on pilotage duty shall show identity lights （）.
At last，the palm trees that fringe the natural harbor of Port Aloahoa come into view on the horizon lit by the setting sun.The meaning of this sentence is that （）.
Above-normal tides near the center of a hurricane maybe caused by the （）.
A pilot vessel on pilotage duty at night will show sidelights and a sternlight （）.
The height of eye correction is smaller than geometrical dip because of （）.
In Admiralty Sailing Directions，bands is the word used to indicate（）marking．
The meaning of ebb tide is that （）.
The height of tide is the （）.
The Earth’s irregular heating is caused by （）.