（）of the following need not be entered in the official logbook?<br>A:The testing of the internal combustion engine driven emergency generator at least once each month the vessel is navigated<br>B:The testing of storage betteries for emergency lighting and systems once each 6 months the vessels is navigated<br>C:The actual draft when the vessel arrives in salt water after department a port<br>D:The testing of the line-throwing appliance once every 3 months

（）of the following need not be entered in the official logbook?
A:The testing of the internal combustion engine driven emergency generator at least once each month the vessel is navigated
B:The testing of storage betteries for emergency lighting and systems once each 6 months the vessels is navigated
C:The actual draft when the vessel arrives in salt water after department a port
D:The testing of the line-throwing appliance once every 3 months

出自：海船船员证

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