A.aground
B.at anchor
C.not under command
D.being towed
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A.average wind conditions
B.tidal currents
C.magnetic variation
D.average limits of field ice
A.B flammable liquid
B.C flammable liquid
C.D combustible liquid
D.E combustible liquid
A.should always be immediately corrected
B.will always cause a vessel to capsize
C.always results from off-center weights
D.All of the above are correct
A.can use radar information from one object to fix the position
B.should never use radar bearings
C.should only use radar bearings when the range exceeds the distance to the horizon
D.must use information from targets forward of the beam
A.rot
B.shrink
C.stretch
D.unlay
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After the boat is at the top of the davit heads，the davit arms begin moving up the tracks and are stopped by the（）.
A vessel in distress should send by radio telephone the two tone alarm signal followed immediately by the（）.
The daily predictions of the times and heights of high and low water for a selection of Standard Ports are given in（）.
After jacking down your liftboat you have an unexpected list.You find that the only cause of this list must be a flooded leg.Your next course of action should be to（）.
After launching，an inflatable raft should be kept dry inside by（）.
Important changes to charts and lights（including temporary ones），radio signals and sailing directions are listed in（）.
Many of the lights on this coast are placed so high as to be frequently obscured by（）.
A person who sees someone fall overboard should（）.
A sweep oar is an oar that is（）.
The light vessel is reported（）.