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The SART is a portable radar transceiver, primarily intended to deploy on survival craft. When it receives a 9 GHz (3cm) radar signal it switches-on its transmitter and radiates own special signal to attract attention on all ships in the vicinity. This is seen as a series of 12 dots on all radar screens within [...]
Archive for the ‘Communication’ Category
The Search and Rescue Transponder (SART) System
Posted by author on July 18th, 2008
Posted in Communication 
Tags: dots, marine radar, radar screens, radar signal, sar operations, sart, ships, survival craft, vicinity 
No Comments »EPIRBs: False Alert and Guard Receiver
Posted by author on July 18th, 2008
An EPIRB should be mounted in an exposed location so that it may float free of obstruction if a vessels sink. EPIRBs are normally visible from the bridge if an EPIRB is dislodge or falls into the sea and it may transmit its distress message without those onboard being aware that it has done so. [...]
Posted in Communication Tags: battery replacement, bridge, bulkhead, circumstances, distress message, distress situation, epirb, epirbs, flights, heavy burden, helicopters, long distance, maintenance checks, rcc, routine maintenance, sar organizations, ships, volunteers, wheelhouse, wing aircraft No Comments »The Emergency Position Indicating Radio Beacon (EPIRB) System
Posted by author on July 18th, 2008
EPIRB alerting via satellite is carried out through the cospass-sarsat network. The cospass-sarsat network provides full global coverage via a series of satellites in polar orbit supplemented by additional series in geostationary orbit. The polar orbiting satellites can determine the EPIRBs position by the Doppler method. This does not require position input at the EPIRB [...]
Posted in Communication Tags: doppler, earth, epirb, global coverage, gps, orbiting satellites, polar orbit, position input, satellite No Comments »The Maritime Safety Information (MSI) System
Posted by author on July 15th, 2008
MSI includes navigational and meteorological warnings, meteorological forecast and other urgent or safety-related messages of importance to all vessels at sea and may also include electronic chart correction data. Broadcast are by MF telex for local MSI and by Inmarsat-C or HF telex for long range MSI. Some countries have elected not to establish NAVTEX [...]
Posted in Communication Tags: electronic chart, inmarsat c, inmarsat cmsi, meteorological warnings, mf, msi, telex No Comments »The Satellite Communication System
Posted by author on July 15th, 2008
Inmarsat is the only provider of GMDSS maritime communication services by satellite, but other providers may offer such services in the future subject to authorization by IMO.
Inmarsat is a commercial enterprise and is currently the only provider of GMDSS maritime communication. Inmarsat also offer a full range of general communication and network solutions. The geographical [...]
