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全部科目 > 水路交通运输技能考试 > 海船船员考试 > 船舶管理(驾驶专业) > 航海英语 > 海上通信 > GMDSS

单项选择题

The frequency（）the safety message will be transmitted shall be included in DSC safety call.

A.which
B.on which
C.at which
D.in which

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单项选择题

We consider（）send a helicopter with medical facilities to the distress area.

A.it necessary
B.it is necessary
C.it necessary to
D.necessary

单项选择题

Radiotelephony communication or radio telex communication or both will be carried out by terrestrial or satellite means,（）the equipment fitted on ship and the area in which the incident occurs.

A.depend on
B.depending on
C.dependent on
D.depended on

单项选择题

Distress traffic is the communication（）between the station in distress and the ships, aircraft, coast radio stations, coast earth stations and rescue centers participating in the rescue work.

A.exchange
B.to exchange
C.exchanging
D.exchanged

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