单项选择题

A block and tackle is “rove to advantage”. This means that the（）.

A.blocks have been overhauled
B.hauling parts of two tackles are attached
C.hauling part leads through the movable block
D.hauling part leads through the standing block

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单项选择题A ballasted vessel sinks enroute to a dry dock. Under these circumstances，the vessel’s owner can claim（）.

A.actual total loss
B.constructive total loss
C.general average
D.particular average

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