A.horizontal
B.vertical
C.diagonal
D.vertical or diagonal
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A.horizontal
B.vertical
C.diagonal
D.vertical or diagonal
A.the chain is not upright
B.the chain is tight
C.the chain is upright
D.the chain is slack
A.pay away the chain
B.take in the chain
C.check up the chain
D.take a strain on the chain
A.high winds
B.high overcast clouds
C.calm or light winds
D.fog or steady rain
A.sound the danger signal
B.when taking action, make only course changes
C.avoid altering course toward a vessel abaft the beam
D.All of the above
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（）is where the crew eat their meals.
Despite the rising importance and great convenience of the gyrocompass,the magnetic compass still retain its importance because of its（）.
Which of the following is not an operation mode of AIS?（）
Which of the following is not a form of precipitation?（）
Where would you find information about the time of high tide at a specific location on a particular day of the year?（）
Which of the following shall not the officers in charge of the navigational watch do?（）
It is dangerous for vessels without the operational radar（）the estuary.
（）is the act of allocating space to containers on board of a container ship in the order of the discharge ports.
The mean draft of a ship is the draft（）.
In the Northern hemisphere northerly winds may cause temperature（）.