GMDSS: Element 7

1. A Only when the original DSC call is not acknowledged, and no follow-on Distress traffic has been heard.
2. B Only by Inmarsat-C TELEX with Distress priority conveying the follow-on Distress traffic that has been heard.
3. C Only by Inmarsat-FBB voice or TELEX with Distress priority if no follow-on Distress traffic has been heard.
4. D Preferably by MF/HF voice or TELEX directly to the RCC conveying the follow-on Distress traffic that has been heard.

Tip: press A-D to answer