A.prevent the towboat from sliding when the rudder is moved
B.prevent the barges from spreading out when backing down
C.hold the towboat securely to the barges
D.prevent the sidewise movement of the face barges
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A.Icebergs may travel in a direction many degrees different from the sea ice
B.Both icebergs and sea ice will move in approximately the same direction and at the same speed
C.Icebergs and sea ice will move in the same direction，but at different speeds due to the sail effect of the berg
D.Icebergs and sea ice will move in the same direction，but the iceberg will move slower because of its underwater bulk
A.Your speed will significantly increase
B.Your draft will significantly decrease
C.Your bow will sheer towards the other vessel
D.Your bow will sheer away from the other vessel
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
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
最新試題
Two vessels are abreast of each other and passing port to port in a confined waterway. What should you expect as your bow approaches the screws of the other vessel? （）
A vessel the passage of which is not to be impeded（）to comply with this Rule when the two vessels are approaching one another so as to involve risk of collision.
A vessel proceeding along the bank of a river or channel has the tendency to（）.
All persons or vessels within the lock area，including the lock approach channels，come under the authority of the（）.
A vessel which is being assisted by an icebreaker should indicate that she is ready to cast off the towline by（）.
In order to reduce your wake in a narrow channel you should（）.
In most cases，when a large merchant vessel enters shallow water at high speed the（）.
An alternating light（）.
A vessel proceeding along the course of a narrow channel shall keep as near to the outer limitof the channel which lies on her starboard side as it is safe and practicable.Which one of the followings does the statement express?（）.
Topside icing decreases vessel stability because it is usually off-center and（）.