单项选择题
Mariners can use DSC for（）.
A.general communication
B.distress alerting and safety calling
C.receive MSI
D.both B and C
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相关考题
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单项选择题
Equipment requirement vary according to（）.
A.Ship owner‟s will
B.economic condition
C.the area in which the ship operates
D.different orders of all countries -
单项选择题
The WWNWS establishes three types of navigational warning:（）.
A.Distress, Urgency and Safety
B.Vital, Important and Routine
C.NAVAREA, Coastal and local
D.gale, Tsunami and Ice -
单项选择题
Every ship must fitted with（）SART, and（）two-way VHF radio telephone.
A.1,2
B.2,3
C.2,1
D.3,2
