单项选择题

When the period of beam seas equals the natural rolling period of a vessel，what will most likely occur?（）

A.Excessive pitching
B.Excessive yawing
C.Excessive rolling
D.No change should be evident

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单项选择题

When taking soundings on a floating ship，the tape should be lowered and brought back quickly to（）.

A.reduce the time the sounding tube is open
B.avoid creating a spark
C.lessen the effect of roll or pitch on the reading
D.lessen the effect of heave on the reading

单项选择题

When running before a heavy sea，moving weights aft will affect the handling of a vessel by （）.

A.reducing rolling
B.increasing rolling
C.reducing yawing
D.increasing yawing

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When preparing a ship for heavy weather，fuel oil day tanks should be（）.

A.pumped overboard to calm the seas
B.drained to the lower hull to reduce free surfaces
C.filled to ensure that sufficient fuel oil is available during a lengthy emergency
D.partially drained to increase free surfaces in order to reduce motions