How can the SART’s audible tone monitor be used?（）<br>A:It informs survivors that assistance may be nearby<br>B:It informs survivors when the battery's charge condition has weakened<br>C:It informs survivors when the SART switches to the standby mode<br>D:It informs survivors that a nearby vessel is signaling on DSC

How can the SART’s audible tone monitor be used?（）
A:It informs survivors that assistance may be nearby
B:It informs survivors when the battery's charge condition has weakened
C:It informs survivors when the SART switches to the standby mode
D:It informs survivors that a nearby vessel is signaling on DSC

出自：海船船员证

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