Gmdss : Element 7 - 511/600
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| A multi-frequency MF/HF DSC Distress Alert: |
| A) Must be transmitted in ascending order of propagation radius to alert nearby ships first. |
| B) May be transmitted on the mandatory MF/HF DSC watch frequencies first, and then on the others. |
| C) Either a) or b), depending on the manufacturer. |
| D) May be transmitted in any order programmed by the GMDSSS operator. |
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