Subelement A: General Information and System Overview.— Topic :
Question 2A2
Element 7R (GMDSS-RO)What equipment utilizes satellite communications?
Explanation
Inmarsat-C is a component of the Global Maritime Distress and Safety System (GMDSS) that provides satellite-based data and messaging services for maritime safety and general communications. The "Inmarsat" name itself is an abbreviation for International Mobile Satellite Organization, directly indicating its reliance on a geostationary satellite constellation for global coverage.
Conversely, VHF-MF-HF refers to very high, medium, and high frequency bands, respectively, primarily used for terrestrial line-of-sight (VHF) or groundwave/skywave (MF/HF) communications, not inherently satellite. NAVTEX is a terrestrial broadcast system on MF and HF for navigational warnings. A SART (Search and Rescue Transponder) is a radar-based device that responds to X-band radar signals from ships or aircraft, aiding in location, rather than utilizing satellite communication.
Related Questions
29E6 The SART is required to have sufficient battery capacity to operate in the stand-by mode for what period of time?2A1 Which GMDSS system utilizes terrestrial radio techniques?2A3 What equipment is used in or near the survival craft?2A4 What equipment is programmed to initiate transmission of Distress alerts and calls to individual stations?2A5 What system provides accurate vessel position information to the GMDSS equipment?