A.the centerline of a navigable channel
B.the starboard side of a channel
C.a prominent object of navigational interest that has no lateral significance
D.an area of a channel where passing another vessel is permitted
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A.heavy rain within six hours
B.a decrease in wind velocity
C.a change in the present weather conditions
D.that fog will soon set in
A.Straight line
B.Arc
C.Parabola
D.Hyperbola
A.large GM
B.high center of gravity
C.excessive free surface
D.small GZ
A.In the lower level of the pumproom
B.In the middle level of the pumproom
C.In the upper level of the pumproom
D.On the deck outside the pumproom
A.atmospheric pressure
B.wind speed
C.relative humidity and dew point
D.wind chill factor
最新試題
Many of the lights on this coast are placed so high as to be frequently obscured by（）.
Admiralty EasyTide（）.
A man aboard a vessel，signaling by raising and lowering his outstretched arms to each side，is indicating（）.
Before personnel are lifted from a vessel in a personnel basket，the vessel should be（）.
The international number，location and/or name，geographical co-ordinates，characteristics and intensity，elevation in metres，range in sea miles and description of structure of a light can be found in（）.
The information on（）is not likely found in The Mariners Handbook.
An orange flag showing a black circle and square is a（）.
Lines drawn through points on the Earth having the same atmospheric pressure are known as （）.
After being rescued from the vessel accident，the people agreed that they had much to（）.
After the boat is at the top of the davit heads，the davit arms begin moving up the tracks and are stopped by the（）.