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
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A person who sees someone fall overboard should（）.
On an Atlantic Ocean voyage from New York to Durban，South Africa，you should expect the Agulhas Current to present a strong（）.
Of the following，（）is not likely found in The Mariners Handbook.
The latest known details of lights are given in（）.
The program of graphical predictions of height against time for a period of up to seven consecutive days is contained in（）.
Lines drawn through points on the Earth having the same atmospheric pressure are known as （）.
An inflatable liferaft should be manually released from its cradle by（）.
Mean high water is the average height of（）.
Light Lists for coastal waters are（）.
Admiralty EasyTide（）.