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On which channel does DSC operate to provide automatic digital distress alerts?
Channel 16
Channel 70
Channel 9
Channel 13
The correct answer is: Channel 70
DSC, or Digital Selective Calling, operates on channel 70 in order to provide automatic digital distress alerts. Option A, channel 16, is the international VHF emergency channel but does not support automatic digital distress alerts. Option C, channel 9, is designated for hailing and safety and does not support automatic digital distress alerts. Similarly, option D, channel 13, is designated for navigational safety and does not support automatic digital distress alerts. Therefore, the correct answer is option B.