單項選擇題A marker pole,with a horseshoe buoy and a sea anchor attached,should be used to().

A.mark the position of a lost mooring
B.determine your vessel's sideslip underway
C.determine your speed through the water
D.indicate location of a man overboard


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1.單項選擇題()the survivors known more of how to cope with cold water in the sinking of MV Titanic in 1912 countless lives().

A.Have/could have been saved
B.Have/could have saved
C.Had/could has saved
D.Had/could have been saved