GMDSS: Element 7

1. A The vessel listens for "free signals" and calls the public correspondence station on the NBDP calling channel with the strongest marker signal.
2. B The vessel calls the public correspondence station on VHF Channel 16, and the two stations then switch to the working channel.
3. C Public Correspondence Stations operate NBDP only.
4. D The vessel calls and establishes voice contact with the public correspondence station on a channel that the station is known to monitor, and the two stations then proceed with their business.

Tip: press A-D to answer