A.two certificates have expired
B.two certificates will expire
C.one of the two certificates have expired
D.one of the two certificates will expire
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A.has the full force of the regular Certificate of Inspection
B.expires six months after it is issued
C.must be exchanged for a regular Certificate of Inspection within 3 months
D.is retained in the custody of the Master
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A flooded leg on a liftboat would adversely affect the vessel’s stability underway by（）.
A fire is discovered in the bow of your vessel while making way. The wind is from ahead at 35 knots. You should（）.
An inert gas system on a tanker should be used to（）.
Permanent magnetism is found in（）.
A helmsman receives the command “Right 15 degrees rudder.”The helmsman’s IMMEDIATE reply should be（）.
Permanent magnetism is caused by（）.
An inert gas system installed on a tanker is designed to（）.
Cargo transfer operations on a tank vessel need NOT be stopped when（）.
A frame with two，or sometimes four，arms through which are threaded the guidelines and which is used to keep the drill stem and bit in line with the center opening in the temporary guide base is the（）.
A safe fuel system must（）.