GMDSS: Element 7

1. A Error correction for one-way TELEX broadcasts of weather or navigation information.
2. B Error Correction when 2 stations are in direct & phased telephone communications with each other.
3. C Error Correction when 2 stations are in direct & phased TELEX communications with each other.
4. D Error correction when 1 station sends a one-way TELEX to a single other station.

Tip: press A-D to answer