单项选择题
Which of the followings does not belong to main maneuvering facilities?（）
A.rudder
B.propeller
C.radar
D.sider thruster
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There shall be（）into sleeping rooms from cargo and machinery spaces or from galleys,storerooms,drying rooms or communal sanitary areas.
A.no direct openings
B.direct openings
C.no more than one direct opening
D.up to one direct opening -
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A power-driven vessel shall have her engine ready for（）when the visibility is restricted.
A.immediate stopping
B.immediate maneuvering
C.immediate anchoring
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The Company should establish procedures in（）to identify equipment and technical systems the sudden operational failure of which may result in hazardous situations.
A.ISM
B.CCS
C.SMS
D.SOLAS
