单项选择题
The transmission of a（）indicates that a ship is in distress and requires immediate assistance.
A.urgent traffic B.distress alert C.routine traffic D.NAVTEX message
单项选择题 A ship station on receiving a shore-to-ship distress alert should（）.
单项选择题 Ship-to-ship distress alerting should be conducted by（）.
单项选择题 On receipt of a distress alert, the SAR units ashore and at sea will（）soonest.
