If a GMDSS radio operator initiates a DSC distress transmission but does not insert a message，what happens? （）<br>A:The transmission is aborted and an alarm sounds to indicate this data must be provided by the operator<br>B:The transmission is not initiated and "ERROR" is indicated on the display readout<br>C:The transmission will be made with "default" information provided automatically<br>D:The receiving station will poll the DSC unit of the vessel in distress to download the necessary information

If a GMDSS radio operator initiates a DSC distress transmission but does not insert a message，what happens? （）
A:The transmission is aborted and an alarm sounds to indicate this data must be provided by the operator
B:The transmission is not initiated and "ERROR" is indicated on the display readout
C:The transmission will be made with "default" information provided automatically
D:The receiving station will poll the DSC unit of the vessel in distress to download the necessary information

出自：海船船员证

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