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单选题
Water may boil up around the stern of a vessel in a channel due to（）.
A
slack water when upbound
B
shallow water
C
a cross current
D
a head current
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单选题Your ship is in shallow water and the bow rides up on its bow wave while the stern sinks into a depression of its transverse wave system. What is this called?（）.A
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单选题Water may boil up around the stern of a vessel in a channel due to（）.A
slack water when upboundB
shallow waterC
a cross currentD
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单选题How should you try to right a capsized small sailing vessel?（）A
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单选题Your vessel is damaged with no list，but down by the stern. There is progressive flooding and trim by the stern is increasing. What is the effect on transverse stability after the deck edge at the stern is submerged?（）A
KB increases，increasing BM and therefore GMB
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BM decreases from loss of water plane and greater volumeD
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单选题从水面到甲板之间的高度称之为干舷。（）A
The height from the bottom of a vessel to the weather deck is called freeboard.B
The depth from water level to the bottom of a vessel is called freeboard.C
The length from the bow to stern of a vessel is called freeboard.D
The height from water level to the main deck is called freeboard.
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单选题When jumping into water upon which there is an oil-fire，you should（）.A
break the water surface with your hands when diving head-firstB
use your hands to hold your knees to your chestC
cover your eyes with one hand while pinching your nose shut and covering your mouth with the otherD
enter the water at the bow or stern on the windward side of the vessel
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单选题Good anchorage may be obtained anywany, generally mud and sand, in this water area. Vessel may have（）.A
good towing groundB
good holding groundC
good grabbing groundD
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