Explanation: SafetyNET is the international satellite-based broadcast service for Maritime Safety Information (MSI) as part of the Global Maritime Distress and Safety System (GMDSS). **D) Inmarsat-C EGC receiver** is the correct answer. Inmarsat-C terminals are specifically designed and mandated under GMDSS to receive Enhanced Group Call (EGC) messages, which include SafetyNET broadcasts, via the Inmarsat satellite system. **A) NAVTEX** is incorrect because it is a terrestrial, medium-frequency (MF) narrow-band direct-printing service for MSI, operating independently of the satellite-based SafetyNET system. **B) MF and HF SITOR (NBDP)** are incorrect. These are terrestrial radioteletype services (Narrow-Band Direct-Printing telegraphy) primarily used for general correspondence or specific MSI in areas not covered by NAVTEX or SafetyNET, and cannot receive satellite broadcasts. **C) Inmarsat F77 EGC receiver** is generally incorrect in the context of the primary GMDSS receiver for SafetyNET. While newer Inmarsat Fleet series terminals (like FleetBroadband, which superseded F77) do incorporate EGC reception, Inmarsat-C is the dedicated, universally recognized, and mandated GMDSS equipment for SafetyNET reception.