Subelement F: Maritime Safety Information (M.S.I.)— Topic :
Question 40F5
Element 7R (GMDSS-RO)SafetyNETTM messages can be received by which of the following shipboard equipment?
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 While newer Inmarsat Fleet series terminals (like FleetBroadband, which superseded F77) do incorporate EGC reception, Inmarsat-C is the dedicated, universally recognized, and mandated GMDSS equipment for SafetyNET reception.
Related Questions
40F3 What system can provide an automated service in coastal waters where it may not be feasible to establish the NAVTEX service or where shipping density is too low to warrant its implementation?40F4 Aboard ship, SafetyNETTM messages can be received by which equipment/methods?40F6 Maritime Safety Information is promulgated via satellite through which system?41F1 SafetyNETTM promulgates what type of information?41F2 What kind(s) of broadcasts are not available through SafetyNETTM?