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2. Maritime Vsat - Wikipedia

   en.wikipedia.org/wiki/Maritime_Vsat

   Maritime VSAT is the use of satellite communication through a Very-small-aperture terminal (VSAT) on a moving ship at sea. Since a ship at sea moves with the water, the antenna needs to be stabilized with reference to the horizon and True north, so that the antenna is constantly pointing at the satellite it uses to transmit and receive signals.

3. International Mobile Satellite Organization - Wikipedia

   en.wikipedia.org/wiki/International_Mobile...

   International Mobile Satellite Organization (IMSO) is the oversight body of the satellite communications elements of the Global Maritime Distress and Safety System (GMDSS) established by the IMO designed to provide a worldwide system for automated emergency signal communication for ships at sea. IMSO ensures that the provision of maritime ...

4. Marisat - Wikipedia

   en.wikipedia.org/wiki/Marisat

   The satellites were designed to be identical, with three communications payloads on board; an ultrahigh frequency UHF (240 to 400 MHz) payload for the U.S. Navy, L-band (1.5 to 1.6 GHz) for ship communications via voice, telex, facsimile and high speed data, and C band (6/4 GHz) for communications to fixed shore stations.

5. Very-small-aperture terminal - Wikipedia

   en.wikipedia.org/wiki/Very-small-aperture_terminal

   The antenna part of a marine VSAT system must be stabilized with respect to the horizon and true north as the ship moves beneath it. Motors and sensors are used to keep the antenna pointed accurately at the satellite. This enables it to transmit to and receive from the satellite while minimising losses and interference with adjacent satellites.

6. Global Maritime Distress and Safety System - Wikipedia

   en.wikipedia.org/wiki/Global_Maritime_Distress...

   This new system, which the world's maritime nations are implementing, is based upon a combination of satellite and terrestrial radio services, and has changed international distress communications from being primarily ship-to-ship based to ship-to-shore (Rescue Coordination Center) based.

7. Maritime mobile-satellite service - Wikipedia

   en.wikipedia.org/wiki/Maritime_mobile-satellite...

   MMSS Inmarsat-3 satellite locations. Maritime mobile-satellite service (MMSS, or maritime mobile-satellite radiocommunication service) is – according to Article 1.29 of the International Telecommunication Union's Radio Regulations (RR) [1] – "A mobile-satellite service in which mobile earth stations are located on board ships; survival craft stations and emergency position-indicating ...