单项选择题
A.bearing B.position C.location D.place
To become an officer on board, you must obtain（）.A.an o...
单项选择题To become an officer on board, you must obtain（）.
A.an officer's license B.an officer's promotion C.an officer's statement D.a seaman's book
In a weather report “GMT” stands for（）.A.Greenwich Mean...
单项选择题In a weather report “GMT” stands for（）.
A.Greenwich Mean Time B.Gross Mean Time C.Great Mean Time D.Gross Metric Ton
It is danger for vessels without the use of（）to approac...
单项选择题It is danger for vessels without the use of（）to approach the estuary in such poor visibility.
A.Loran C B.Direction Finder C.Gyro- compass D.Radar
