A.actual total lossB.constructive total lossC.general a……

单项选择题A backlash below a lock is defined as a（）.

A.current setting your vessel on the wall
B.current setting into the lock chamber
C.an eddy working along the lower guide wall
D.current setting counterclockwise

单项选择题A “spring line” is（）.

A.any wire rope used for mooring
B.a fire-warp
C.a mooring line running diagonally to the keel
D.a mooring line perpendicular to the keel

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