单项选择题

When oil is discharged overboard，an entry is required in the（）.

A.engine rough log
B.Oil Record Book
C.Official Logbook
D.deck rough log

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单项选择题

When must the Master of a vessel log the position of load line marks in relation to the surface of the water in the Official Logbook?（）

A.Once a day
B.At the change of every watch
C.Only when in fresh or brackish water
D.Prior to getting underway

单项选择题

When is the density of the water required to be logged in the logbook of a ship?（）

A.Any time the vessel moves from water of one density into waters of a different density
B.Prior to getting underway when the vessel is floating in fresh or brackish water
C.Only when the vessel moves from fresh water into salt water
D.The density of the water is not required to be logged in the unofficial logbook

单项选择题

When are fore and aft draft readings required to be entered in the unofficial logbook of a ship? （）

A.Once a day
B.Once a week
C.Prior to getting underway
D.Only when entering waters of different density