单选题When engaged on international voyages, ships of 1600 tons gross tonnage and upwards shall be fitted with a（）.Aradio direction-finding apparatusBDSCCNAVTEXDEPIRB
单选题
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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