Which equipment is not a source of locating signals?（）<br>A:EPIRB's that transmit on 406 MHz<br>B:Survival craft VHF transceivers that provide a beacon on 121.5 MHz<br>C:COSPAS-SARSAT EPIRBs<br>D:SARTs operating on 9 GHz

Which equipment is not a source of locating signals?（）
A:EPIRB's that transmit on 406 MHz
B:Survival craft VHF transceivers that provide a beacon on 121.5 MHz
C:COSPAS-SARSAT EPIRBs
D:SARTs operating on 9 GHz

出自：海船船员证

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