7-19C3 A
 What are the mandatory DSC watchkeeping bands/channels?
A. 8 MHz HF DSC, 1 other HF DSC, 2 MHz MF DSC and VHF Ch-70.
B. 2 MHz MF DSC, 8 MHz DSC, VHF Ch-16 and 1 other HF DSC.
C. VHF Ch-70, 2 MHz MF DSC, 6 MHz DSC and 1 other HF DSC.
D. VHF Ch-70, 2 MHZ MF DSC, 4 MHZ DSC and 8 MHz DSC.
