What are the mandatory DSC watchkeeping bands/channels?

Correct Answer: Option C — 8 MHz HF DSC, 1 other HF DSC, 2 MHz MF DSC and VHF Ch-70.

Under USCG National Maritime Center examination standards, the accepted correct answer is: 8 MHz HF DSC, 1 other HF DSC, 2 MHz MF DSC and VHF Ch-70..