A.A conditional or partial exemption may be granted，in exceptional circumstances，for a single voyage outside the sea area for which the vessel is equipped B.Once a compulsory vessel's GMDSS station has been fitted and inspected，the station must be inspected only once every five years C.All passenger vessels and all cargo vessels that are 300 Gross Tons or larger must comply D.Compulsory vessels must carry at least two licensed GMDSS Radio Operators
A.Two licensed GMDSS radio operators B.Equipment carriage requirements C.Distress alerting and response D.All of the above
A.an CES / telex mode B.an SES telex service C.the service /the subscriber D.a satellite /an ocean region
A.any appropriate channel except public communication B.any appropriate channel except for public communications C.any appropriate channel besides public communication D.any appropriate channel beside public communication
A.After determining that the frequency or channel appears to be no longer in use B.After determining that geographic distance from the distress situation will prohibit any other signal from interfering with emergency communications C.Routine communications can resume after the Rescue Coordination Center transmits a message on the frequency or channel being used for emergency communications stating that such traffic has concluded D.If，in the Master's opinion，communications on that frequency will interfere with emergency communications
A.distress, urgent and safety B.safety and routine C.urgent, safety and routine D.distress, urgent, safety and routine
A.20 hour B.12 hour C.24 minute D.24 hour
A.week B.two weeks C.month D.two months
A.coordinate in rescue operation B.send rescue vessels C.reach the area at once D.conduct a sector search
A.urgent traffic B.distress alert C.routine traffic D.NAVTEX message
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