A.varies
B.maintains
C.Shifts
D.assembles
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A.UK Hydrographic Office
B.IMO
C.International Hydrographic Organization
D.International Association of Classification society
A.Being mroe than 25 miles from shore
B.Only at night when it‟s dark
C.Being more than 6 miles from shore
D.Never
A.Advection
B.Radiation fog
C.frontal fog
D.Steam fog
A.speed
B.height
C.direction
D.course
A.lateral marks and cardinal marks
B.safe water marks
C.isolated danger marks and special marks
D.dangerous water marks
最新試題
The force resulting from the earth’s rotation that causes winds to deflect to the right in the Northern Hemisphere and to the left in the Southern Hemisphere is called（）.
It is dangerous for vessels without the operational radar（）the estuary.
Bales close to the deckhead should be covered to prevent（）.
（）is on the panel of radar.
The company should establish and maintain procedures to control all documents and date which are relevant to（）.
Fog is likely to occur when there is little difference between the dew point and the（）.
Which of the following is not a form of precipitation?（）
The dew point temperature is（）.
（）is the act of allocating space to containers on board of a container ship in the order of the discharge ports.
Despite the rising importance and great convenience of the gyrocompass,the magnetic compass still retain its importance because of its（）.