单项选择题
Under threat, ship master activate SSAS system and send a message to（）.
A.nearby coast station B.flag administration C.vessels in the vicinity D.charterer and sub-charterer
单项选择题 Could you tell me（）the seaport（）?
单项选择题 I am a seaman, I come（）the People’s Republic of China.
单项选择题 Vessel（）still to bunker 50 tons of fresh water.
