Which of the following is the primary frequency that is used exclusively for NAVTEX broadcasts internationally?
Official USCG Answer & Rule Citation
Correct Answer: Option A — 518 kHz
The international frequency for NAVTEX broadcasts is 518 kHz. This frequency is reserved globally for the transmission of Maritime Safety Information (MSI) in English. While 490 kHz and 4209.5 kHz are also used for national or local language broadcasts, 518 kHz remains the primary international standard.
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