7-27D4 B
 A DSC Distress alert:
A. Must always be sent on VHF Ch-70.
B. Will always be sent on one or more of the DSC Distress frequencies.
C. Must always be sent on MF 2 MHz plus one other HF DSC frequency.
D. Must always be sent on VHF Ch-70, then 2 MHz MF then 8 MHz HF.
