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（）.
For the purposes of cargo oil containment，the fixed container under the manifold of an eight-inch loading line must hold a minimum of（）.
After sending a message describing the symptoms of an ill crew member，you receive a message containing the code MRL. This means（）.
An inert gas system on a tanker should be used to（）.
Permanent magnetism is found in（）.
Permanent magnetism is caused by（）.
A fire has broken out on the stern of your vessel. You should maneuver your vessel so the wind （）.
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 helmsman receives the command “Right 15 degrees rudder.”The helmsman’s IMMEDIATE reply should be（）.
A hand held instrument used to measure distances between objects and the ship is a（）.