Safety, Fire & Survival · GMDSS — MF Distress Frequency
The dedicated MF digital selective calling (DSC) distress frequency is:
- A156.8 MHz (VHF Ch 16)
- B2187.5 kHz✓ Correct
- C121.5 MHz
- D518 kHz
Explanation
2187.5 kHz is the MF DSC distress and safety calling frequency; the associated MF radiotelephone distress frequency is 2182 kHz. (VHF DSC distress is Channel 70; NAVTEX is 518 kHz; 121.5 MHz is an aeronautical/EPIRB homing frequency.)
Authority: ITU Radio Regulations; GMDSS
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