Satellite Communication
Related Terms |
RADIO OPERATOR
The officer who operates and controls the shipboard communication equipment.
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COMMUNICATION
The transfer of intelligence between points. If by wire, radio, or other electromagnetic means, it may be called tele- communication; if by radio, radiocommunication.
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CES
Coast Earth Station maritime name for an Inmarsat shore-based station linking ship earth stations with terrestrial communication networks
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SMCP
Standard Marine Communication Phrases an updated version of SMNV that includes phrases that have been developed to cover the most important safety-related fields of verbal communications
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SES
Ship Earth Station shipborne satellite communication station, used for exchanging messages with shore subscribers and ships
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PASSIVE SATELLITE
1. A satellite which contains power source to augment the output signal (i.e., reflected only) as contrasted with ACTIVE SATELLITE; a satellite which is a passive reflector. 2. As defined by the International Telecommunications Union (ITU), an earth satellite intended to transmit radio communication signals by reflection.
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RADIO SPECTRUM
The range of electromagnetic radiation useful for communication by radio (approximately 10 kilohertz to 300,000 megahertz).
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RADIO DIRECTION-FINDING STATION
As defined by the International Tele- communication Union (ITU), a radiodetermination station using radio direction finding.
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RADIONAVIGATION-SATELLITE SERVICE
As defined by the International Tele- communication Union (ITU) a radiodetermination-satellite service used for the same purposes as the radionavigation service; in certain cases this service includes transmission or retransmission of supplementary information necessary for the operation of radionavigation systems.
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SEA AREA
A defined area under the Global Maritime Distress and Safety System (GMDSS) which regulates certain safety and communication equipment necessary according to the area of the ship’s operations. Sea Area A-1 is within coverage of VHF coast radio stations (25-30 miles) providing digital selective calling. Sea Area A-2 is within range of the medium frequency coast radio stations (to approximately 300 miles). Sea Area A-3 is within the footprint of the geostationary INMARSA T communications satellites, covering the rest of the open seas except the poles. Sea Area A-4 covers the rest of the earth, chiefly the polar areas. The areas do not overlap.
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