A.BowB.SternC.TailD.After（）（尾） thrust half to part!……

单项选择题We need an experienced（）（一水）.

A.AB
B.seaman
C.OS
D.agent

单项选择题Ring the forecastle（）（钟）.

A.bell
B.clock
C.hammer
D.spanner

单项选择题Modern ships are navigated by（）（卫星）.

A.moon
B.satellite
C.sextant
D.radar

单项选择题Their task is to（）（驾驶） the ship safely.

A.navigate
B.operate
C.takeover
D.drive

单项选择题Keep the vessel to the （）(中间)of the channel.

A.port
B.middle
C.head
D.front