Functional Requirements G.M.D.S.S

Every vessel during at sea has to be capable of performing the nine radio-communication functions of the GMDSS, viz:

Transmission of ship-to-shore distress alerts by at least two separate and independent means, each using a different radio-communication service.

Reception of shore-to-ship distress alerts.

Transmission and reception of ship-to-ship distress alerts.

Transmission and reception of search and rescue co- ordinating communications.

Transmission and reception of on-scene communications.

Transmission and reception of signals for locating.

Transmission and reception of Maritime Safety Information (MSI).

Transmission and reception of general radio-telecommunications to and from shore-based radio systems or networks.

Transmission and Reception of bridge-to-bridge communications.

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