Which is the key part of the search and rescue system under GMDSS?

Correct Answer: Option A — COSPAS/SARSAT satellites

The COSPAS-SARSAT system is the international satellite-based search and rescue distress alerting system. It detects and locates signals from 406 MHz EPIRBs, relaying the distress information to Mission Control Centers and Rescue Coordination Centers globally, forming the backbone of GMDSS distress alerting.