A “spring line” is（）.

单项选择题A “sheepshank” is used to（）.

A.keep a line from fraying
B.join lines of unequal size
C.stop off a line
D.shorten a line

单项选择题A “reaching” course is one in which the wind（）.

A.comes directly over the bow
B.comes directly over the stern
C.comes over an area extending from broad on the bow to the quarter
D.has no effect on the vessel

单项选择题A “Mediterranean moor” should be used when（）.

A.when anchoring in the Mediterranean
B.when docking stern to a berth
C.when docking bow to a berth
D.when anchoring in a strong current

单项选择题A “loose” tow may cause all of the following EXCEPT（）.

A.loss of maneuverability
B.lines to part
C.damage to the towing vessel and tow
D.a saving in the transit time

单项选择题A “liner” in riveted construction of a vessel is a(n) （）.

A.small plate which fills the aperture between riveted strakes and the vessel framing
B.backing plate which is used to level the strakes while riveting，and then removed
C.internal frame to which the side shell is riveted
D.seam that is welded after riveting is completed