单项选择题
（）will form the basis for distress alerting and safety calling.
A.GMDSS
B.EGC
C.MSI
D.DSC
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相关考题
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单项选择题
Distress signal are always stored in the memory so as to start（）.
A.local-mode coverage
B.SAR operation
C.data process
D.continuous broadcast -
单项选择题
When the power of SART is on, it will（）.
A.transmit distress signal
B.send response signal
C.transmit the signal of ship’s position
D.be started by X-band radar -
单项选择题
The source of energy fitted in GMDSS complying vessels must be（）.
A.the main source of energy
B.emergency source of electrical power
C.the reserve source of energy
D.all of above
