GMDSS: Element 7R

1. A Ship-to-ship Distress communications using MF or HF radiotelephony.
2. B VHF digital selective calling from ship to shore.
3. C Distress, Urgency and Safety communications carried out by the use of narrow-band direct printing telegraphy.
4. D The linking of search and rescue authorities ashore with shipping in the immediate vicinity of a ship in Distress or in need of assistance.

Tip: press A-D to answer