The complying vessels can transmit ship-to-shore distress alerts by at least（）.<br>A:one means, whether satellite or terrestrial techniques<br>B:two means, whether satellite or terrestrial techniques<br>C:two separate and independent means, each using different radio communication services<br>D:two means, such as MF DSC and HF DSC

The complying vessels can transmit ship-to-shore distress alerts by at least（）.
A:one means, whether satellite or terrestrial techniques
B:two means, whether satellite or terrestrial techniques
C:two separate and independent means, each using different radio communication services
D:two means, such as MF DSC and HF DSC

出自：海船船员证

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