What is the channel spacing for MF-HF voice frequencies?
Official USCG Answer & Rule Citation
Correct Answer: Option D — 3 kHz
MF and HF voice channels are standardized with a 3 kHz bandwidth to accommodate Single Sideband (SSB) transmissions. This spacing ensures sufficient separation between adjacent channels to prevent interference while maintaining the necessary audio fidelity for clear voice communications as required by ITU Radio Regulations for maritime mobile services.
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