A.main brace
B.tow span
C.jockey bar
D.None of the above
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A.one sidelight
B.one sidelight and a masthead light
C.one sidelight and two masthead lights
D.both sidelights of a vessel and her masthead light(s)
A.vernier
B.psychrometer
C.hygrometer
D.stadimeter
A.information or regulatory buoy that has lateral significance
B.buoy that is off-station and is marked to warn mariners of its wrong position
C.dual purpose marking used where the ICW and other waterways coincide
D.buoy that was set in error and will be replaced with a red nun buoy
A.drill stem guide
B.guide frame
C.drill string frame
D.casing guide
A.increasing the righting moment
B.decreasing the vessel's displacement
C.increasing the reserve buoyancy
D.shifting the CG (center of gravity) off center
最新試題
An inert gas system installed on a tanker is designed to（）.
A fire pump may be used for other purposes if（）.
A heavy steel curved arch constructed athwartships and above the after deck on a towing vessel is sometimes called a（）.
A large valve，usually installed above the ram preventers，that forms a seal in the annular space between the pipe and wellbore or，if no pipe is present，on the wellbore itself is called the（）.
It is not necessary to declare（）in the Health List.
How could lashing gear used aboard Ro-Ro vessels be stowed when not in use? （）
A heavy，thick-walled tube，usually steel，used between the drill pipe and the bit in the drill stem to weight the bit in order to improve its performance is called a（）.
Entries should be made in a Ro-Ro vessel’s cargo-securing device record book for（）.
Please supply 200 tons of fresh water（）my ship.
After sending a message describing the symptoms of an ill crew member，you receive a message containing the code MRL. This means（）.