单项选择题
A.a mother ship B.a lifeboat C.a life craft D.all of A,B,C
All stations which receive a distress alert shall immed...
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
When receiving a distress alert, the SAR authorities as...
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
In the GMDSS, distress alerting can be transmitted in（）...
单项选择题In the GMDSS, distress alerting can be transmitted in（）directions.
A.1 B.2 C.3 D.4
