Subelement F: Maritime Safety Information (M.S.I.)— Topic :
Question 42F3
Element 7R (GMDSS-RO)Which of the following provides a unique automated system capable of addressing messages to predetermined groups of ships or all vessels in both fixed and variable geographic areas?
Explanation
Enhanced Group Call (EGC) is a unique automated system, part of the Inmarsat satellite network's SafetyNET and FleetNET services. EGC allows for the broadcast of Maritime Safety Information (MSI) to all vessels within fixed or variable user-defined geographic areas (SafetyNET) or to predetermined groups of ships (FleetNET). It operates via satellite, utilizing L-band frequencies, making it a crucial component of the Global Maritime Distress and Safety System (GMDSS) for targeted and efficient communication of urgent safety messages.
NAVTEX, while automated, broadcasts to all ships within pre-defined, fixed coastal areas and doesn't offer the flexibility of variable geographic areas or specific group addressing. NAVAREAs are simply designated oceanographic regions for coordinating navigational warnings, not a communication system itself. AFRTS is a broadcast service for military personnel, unrelated to maritime safety communication.
Related Questions
42F1 Over what system are Enhanced Group Calls transmitted?42F2 What is the purpose of the dedicated EGC receiver for A-1 area GMDSS Vessels?42F4 What system may be useful for messages, such as local storm warnings or a shore-to-ship Distress alert, for which it is inappropriate to alert all ships in the satellite coverage area?42F5 What services are available through Enhanced Group Calls?42F6 What messages originate from registered information providers anywhere in the world and are broadcast to the appropriate ocean region via a LES?