单项选择题
Ships sailing in（）are able to receive and print out EGC messages.
A.a fixed area or Navarea in any ocean region B.a Navarea or weather forecast area C.the designated area or given geographic position D.anywhere of the world
单项选择题 Maritime Safety Information（）International SafetyNet Service and NAVTEX Service.
单项选择题 If the DSC controller is configured for MF/HF operation, the distress will be sent on（）.
单项选择题 Ship-to-ship distress alerting should be conducted by（）.
