单项选择题
Ship-to-ship distress alerting should be conducted by（）.
A.Inmarsat SES B.VHF /DSC or MF/DSC C.SART and VHF/DSC D.Satellite EPIRB and VHF /DSC
单项选择题 On-scene communications will normally take place between（）.
单项选择题 （）will form the basis for distress alerting and safety calling.
单项选择题 Distress signal are always stored in the memory so as to start（）.
