When testing a Class A EPIRB you will know the EPIRB is working properly if you hear on 99.5 Mhz FM or any vacant frequency on a nearby AM radio（）.<br>A:a distinctive signal<br>B:the Morse Code signal for SOS<br>C:a computerized voice announcement of Mayday<br>D:your vessel's International Radio Call Sign

When testing a Class A EPIRB you will know the EPIRB is working properly if you hear on 99.5 Mhz FM or any vacant frequency on a nearby AM radio（）.
A:a distinctive signal
B:the Morse Code signal for SOS
C:a computerized voice announcement of Mayday
D:your vessel's International Radio Call Sign

出自：海船船员证

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