單項選擇題A celestial body will cross the prime vertical circle when the latitude is numerically（）.

A.greater than the declination and both are of the same name
B.less than the declination and both are of the same name
C.greater than the declination and both are of contrary name
D.less than the declination and both are of contrary name


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1.單項選擇題A casualty report of an intentional grounding of a ship is required under what condition?（）

A.Under any condition
B.If the grounding lasts over 24 hours
C.If it creates a hazard to the environment
D.At the owner's discretion

2.單項選擇題A buoy with a composite group-flashing light indicates a(n)（）.

A.bifurcation
B.fish net area
C.anchorage area
D.dredging area

3.單項選擇題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

4.單項選擇題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

5.單項選擇題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