Gmdss : Element 7 - 307/600
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| Which of the following is the primary frequency that is used exclusively for NAVTEX broadcasts internationally? |
| A) 518 kHz |
| B) 2187.5 kHz |
| C) 4209.5 kHz |
| D) VHF channel 16 when the vessel is sailing in Sea Area A1, and 2187.5 kHz when in Sea Area A2. |
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