GMDSS: Element 7

1. A Safety communications by direct-printing telegraphy should be in the ARQ mode when communicating with the U.S. Coast Guard or other coast stations on channels that they normally guard.
2. B Distress communications other than directly to the Coast Guard or other coast stations on the channels that they normally guard, should be in the broadcast SSB mode.
3. C The ARQ mode may not be used subsequently to the FEC mode even when it is advantageous to do so.
4. D Distress communications other than directly to the Coast Guard or other coast stations on the channels that they normally guard, should be in the broadcast FEC or SSB mode.

Tip: press A-D to answer