GMDSS: Element 7

1. A Must be transmitted in ascending order of propagation radius to alert nearby ships first.
2. B May be transmitted on the mandatory MF/HF DSC watch frequencies first, and then on the others.
3. C Either a) or b), depending on the manufacturer.
4. D May be transmitted in any order programmed by the GMDSSS operator.

Tip: press A-D to answer