单项选择题

Reducing free surfaces has the effect of lowering the（）.

A.uncorrected KG
B.virtual height of the center of gravity
C.metacenter
D.metacentric height

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单项选择题

On which vessels are the officers and deck crew allowed to operate under a two-watch system on voyages of less than 600 miles? （）

A.Towing vessels
B.Offshore supply vessels
C.Barges，when manned
D.All of the above

单项选择题

Maritime Administration personnel may be allowed in the pilothouse upon the responsibility of the（）.

A.Chief Officer
B.Navigator
C.most senior person present from the Maritime Administration
D.officer in charge of the watch

单项选择题

In writing up the logbook at the end of your watch，you make an error in writing an entry. What is the proper way of correcting this error? （）

A.Carefully and neatly erase the entry and rewrite it correctly
B.Cross out the error with a single line，write the correct entry，and initial it
C.Blot out the error completely and rewrite the entry correctly
D.Remove this page of the log book and rewrite all entries on a clean page