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Infographic explaining SOLAS Chapter IV requirements for GMDSS distress alerting, sea areas, continuous radio watch and reserve power.

Bridge, Navigation & GMDSS

SOLAS Chapter IV: Radiocommunications and GMDSS Requirements

SOLAS Chapter IV establishes the international GMDSS framework for distress alerting, safety communications, radio watchkeeping, equipment carriage and emergency communications at sea.

Aug 7, 2026•4 min read