Never make comment，estimate or guess in your Logbook，but（）only.

单项选择题Logbooks are used to record the events occurring when（）.

A.the ship is in a harbor
B.the ship is at anchorage
C.the ship is underway
D.all of the above

单项选择题Lifeboat winches on a ship are required to be inspected and an entry made in the logbook. What should this entry include? （）

A.The time required to lower a lifeboat
B.The time required to raise a lifeboat
C.The date of inspection and condition of the winch
D.All of the above

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 means of correcting this error? （）

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

单项选择题In writing up the log book at the end of your watch，you make an error.which of the following is the way to correct the error（）.

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

单项选择题All of the following records are usually maintained by the watch-standing officers aboard avessel EXCEPT the（）.

A.deck logbook
B.official logbook
C.compass record book
D.chronometer error book