The difference between a class A and a class B EPIRB is that the class A EPIRB（）.<br>A:operates on both military and civilian aircraft distress frequencies<br>B:transmits both an alerting signal and a homing signal<br>C:must be the float free type and automatically activated<br>D:operates with a greater output of signal power

The difference between a class A and a class B EPIRB is that the class A EPIRB（）.
A:operates on both military and civilian aircraft distress frequencies
B:transmits both an alerting signal and a homing signal
C:must be the float free type and automatically activated
D:operates with a greater output of signal power

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