單項(xiàng)選擇題

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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單項(xiàng)選擇題

In areas covered by Inmarsat HF can be used as an（）to satellite communications.

A.alternation
B.alternate
C.alter
D.alternative

單項(xiàng)選擇題

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