单项选择题
When receiving a distress alert, the SAR authorities ashore and the ships in the vicinity of the ship in distress will（）in a coordinated search and rescue operation with the minimum delay.
A.assist
B.send a rescue vessel
C.search the distress area
D.reach the distress position at once
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相关考题
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单项选择题
In areas covered by Inmarsat HF can be used as an（）to satellite communications.
A.alternation
B.alternate
C.alter
D.alternative -
单项选择题
With the help of GMDSS（）can be alerted to a distress incident as soon as possible.
A.all ships in a large sea area
B.only the sea authorities ashore
C.the SAR units ashore and at sea
D.the port radios and the coast stations -
单项选择题
The Inmarsat system is open for use by（）countries on a non-discriminatory basis.
A.some
B.lots of
C.many
D.all
