GMDSS is primarily a system based on?

Correct Answer: Option 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.

The GMDSS architecture is designed to bridge the gap between a vessel in distress and the global SAR infrastructure. By linking shore-based Rescue Coordination Centers with nearby vessels through automated digital alerts, the system ensures that professional help is mobilized while local assets provide immediate, effective assistance.