019C C
 What are the mandatory DSC watchkeeping bands/channels?
a) VHF Ch-70, 2 MHz MF DSC, 6 MHz DSC and 1 other HF DSC.
b) 2 MHz MF DSC, 8 MHz DSC, VHF Ch-16 and 1 other HF DSC.
c) 8 MHz HF DSC, 1 other HF DSC, 2 MHz MF DSC and VHF Ch-70.
d) None of the above
