单项选择题
When engaged on international voyages, ships of 1600 tons gross tonnage and upwards shall be fitted with a（）.
A.radio direction-finding apparatus
B.DSC
C.NAVTEX
D.EPIRB
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相关考题
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单项选择题
The maritime access code of telephone mode in INMARSAT-A terminal for the AOR(W) is（）.
A.871
B.872
C.873
D.874 -
单项选择题
In Inmarsat-A, “Priority 0” means（）communication.
A.routine
B.distress
C.urgency
D.safety -
单项选择题
The maritime access code for the IOR is（）in INMARSAT-A Telex Service.
A.581
B.582
C.583
D.584
