Which of the following frequencies is normally used for Distress and Safety communications?
Official USCG Answer & Rule Citation
Correct Answer: Option D — 2174.5 kHz
Frequency 2174.5 kHz is internationally allocated exclusively for narrow-band direct-printing (NBDP) telegraphy used in GMDSS distress and safety communications. Conversely, 490 kHz, 518 kHz, and 4209.5 kHz are designated for NAVTEX maritime safety information broadcasts.
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