GMDSS: Element 7R

1. A Always goes out on the DSC frequency of Ch-70 to alert other stations.
2. B Must go out on Ch-16 and Ch-70 to indicate “MAYDAY” traffic will follow.
3. C Must go out on Ch-16 to alert the nearest vessels and coast stations of imminent “MAYDAY” traffic.
4. D May go out on Ch-70 or Ch-16 depending on the manufacturer.

Tip: press A-D to answer