A.is usually below the center of gravity and has little effecton stability
B.will cause water on deck to pocket and increase stability
C.may decrease stability by increasing free surface effect due to water on deck
D.increases the effective freeboard and increases thewind-heel affect
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A.displacement
B.free surface
C.draft
D.KG
A.increases displacement
B.increases the height of the center of gravity
C.increases draft
D.reduces the pocketing of free surface
A.changes in seawater salinity
B.glare on clouds on the horizon
C.changes in air temperature
D.icebergs
A.can usually be detected by radar in a smooth sea at a range of 4 to 6 kilometers
B.are indistinguishable from sea return on the PPI
C.are invisible to radar when covered with a thick layer of snow
D.are usually seen at night before they are close enough to provide a radar echo
A.one engine ahead and one engine astern，with full rudder
B.one engine ahead and one engine astern，with rudders amidships
C.both engines ahead，with full rudder
D.both engines astern，with full rudder
最新試題
A vessel which is being assisted by an icebreaker would display a flag hoist consisting of the code numeral 4 when the vessel（）.
An alternating light（）.
A vessel proceeding along a narrow channel shall（）.
Topside icing that blocks freeing ports and scuppers（）.
A vessel proceeding along the course of a narrow channel or fairway shall keep as near to the （）limit of the channel or fairway which lies on her（）side as is safe and practicable.
A vessel shall slacken her speed，stop，or reverse her engines，if necessary，to（）.
Any vessel shall，if the circumstances of the case admit，avoid（）in a narrow channel.
If a tow sinks in shallow water，you should（）.
In most cases，when a large merchant vessel enters shallow water at high speed the（）.
A vessel reduces speed without backing. The rate that her speed through the water decreases depends primarily on the（）.