单项选择题
All stations which receive a distress alert shall immediately cease（）.
A.any transmission
B.any harmful transmission
C.to use radiotelephone
D.using radiotelephone
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相关考题
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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（）soonest.
A.reach the distress area
B.conduct a sector search
C.send rescue vessels
D.assist coordinately in SAR operation -
单项选择题
In the GMDSS, distress alerting can be transmitted in（）directions.
A.1
B.2
C.3
D.4 -
单项选择题
We（）the distress signal on our own radio before the shore station relayed it to us.
A.received alreadly
B.have received
C.had received
D.was receiving
