GMDSS: Element 7

1. A Some units transmit on the mandatory MF/HF DSC watch frequencies first, and then on the others.
2. B Some units transmit in ascending order of propagation radius to alert nearby ships or shore stations first.
3. C May be transmitted in any order programmed by the GMDSSS operator.
4. D Multi-frequency alerts work quite differently, depending on the manufacturer and require care and understanding of the feature.

Tip: press A-D to answer