🔍 Key Concepts

• Maritime Safety Information (MSI) and how it is broadcast globally • Difference between satellite systems and radio telex/medium-range broadcast systems like NAVTEX • Which Inmarsat services are specifically designed for SafetyNET and EGC (Enhanced Group Call) messages

💭 Think About

• Look at which option is explicitly a satellite service designed for broadcasting safety information over wide ocean areas, not just coastal areas • Ask yourself: which system is associated with SafetyNET in the GMDSS structure? • Consider whether each choice is mainly used for ship reporting, coastal text broadcasts, or global safety message broadcasting

✅ Before You Answer

• Confirm which choices are actually satellite-based (Inmarsat services) versus MF/HF or VHF broadcast systems like NAVTEX • Identify which option is tied by name to SafetyNET, the recognized satellite MSI broadcast service in GMDSS • Eliminate any system whose primary function is voluntary ship reporting or ordinary voice/telephone/data services, not MSI broadcasting