GMDSS: Element 7

1. A To ensure that interference to proprietary communications is minimized.
2. B To ensure that only voice communications can be effected on the Distress frequency or channel.
3. C To ensure that a Distressed vessel will have a "window" twice each hour for transmitting routine messages.
4. D To ensure that interference on a particular frequency or channel for communications concerning emergency traffic is minimized.

Tip: press A-D to answer