单项选择题
During an annual FCC inspection（）.
A.all required documents and publications may have to be produced B.licensed GMDSS radio operators may be required to demonstrate equipment competencies C.all required equipment must be fully operational D.All of the above
单项选择题 Class C EPIRBs are（）.
单项选择题 Class A EPIRBs are required on（）.
单项选择题 CATEGORY A EPIRB’s transmit on frequencies that are monitored by（）.
