Functional Requirements of GMDSS ?

1. Transmitting ship-to-shore distress alert by at least two separate and independent means, each using different radio communication service.

2. Capable of receiving shore-to-ship distress alerts.

3. Transmitting and Receiving ship-to-ship distress alert.

4. Transmitting and Receiving search and rescue co-ordinating communication.

5. Capable of transmitting and receiving on scene communication.

6. Capable of transmitting and receiving signals for locating.

7. Transmitting and receiving of maritime safety information.

8. Transmitting and receiving general radio communication to and from shore-based radio system or networks.

9. Capable of transmitting and receiving bridge-to-bridge communications.