A.vernier
B.psychrometer
C.hygrometer
D.stadimeter
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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
A.one control
B.two controls
C.three controls
D.none of the above
A.anchored
B.underway but not fishing
C.tending a small fishing boat
D.fishing by trawling
最新試題
Permanent magnetism is caused by（）.
It is not necessary to declare（）in the Health List.
It is not necessary to declare（）in MARITIME HEALTH DECLARATION.
A jack-up drilling rig being towed must（）.
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（）.
How could lashing gear used aboard Ro-Ro vessels be stowed when not in use? （）
A large vessel is equipped with a controllable pitch propeller. Which statement is TRUE?（）
A fishing vessel casualty must be reported to the Coast Guard if it involves（）.
Entries should be made in a Ro-Ro vessel’s cargo-securing device record book for（）.
A heavy steel curved arch constructed athwartships and above the after deck on a towing vessel is sometimes called a（）.