A.west in west longitude and east in east longitude
B.east in west longitude and west in east longitude
C.west
D.east
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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
A.lower low water
B.high water
C.low water
D.sea level
A.the height of the tide
B.depth of water under the bridge
C.charted vertical clearance at mean low water
D.distance from the water to low steel of the bridge
最新試題
Clearances of bridges and overhead cables below Bonneville Dam refer to heights in feet above mean （）.
The meaning of ebb tide is that （）.
The Earth has the shape of a(n) （）.
An occulting light is one in which （）.
The distance between any two meridians measured along a parallel of latitude （）.
In Admiralty Sailing Directions，bands is the word used to indicate（）marking．
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 Earth’s irregular heating is caused by （）.
Information on the operating times and characteristics of foreign radiobeacons can be found in which publication? （）
A pilot vessel on pilotage duty at night will show sidelights and a sternlight （）.