单项选择题
A.self-propelled，inspected vessels
B.towing vessels
C.recreational vessels
D.uninspected passenger vessels
单项选择题 CATEGORY A EPIRB’s transmit on frequencies that are monitored by（）.
单项选择题 All self-propelled vessels on an international voyage must be equipped with how many Emergency Position Indicating Radiobeacons (EPIRB)（）?
单项选择题 A vessel operating outside of coastal waters must carry an automatically activated Emergency Position Indicating Radio Beacon (EPIRB) if she（）.