單項選擇題As the weather was worsening and wind force rising to 8，my vessel（）were yawing within forty degrees of the compass.

A.alongside the wharf
B.grounded in the channel
C.at buoys
D.at anchor


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1.單項選擇題When pushing ahead，wires leading from the quarters of the after outboard barges to the bow of a towboat（）.

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

2.單項選擇題When operating in an area where sea ice and icebergs are present，which statement is TRUE? （）

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

3.單項選擇題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.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

4.單項選擇題Topside icing that blocks freeing ports and scuppers（）.

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

5.單項選擇題Topside icing decreases vessel stability becauseit increases（）.

A.displacement
B.free surface
C.draft
D.KG