ITU-R Sg.8 Seminar The Global Maritime Distress and Safety System (GMDSS)
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ITU-R Sg.8 Seminar The Global Maritime Distress and Safety System (GMDSS) Eirik Bliksrud Norwegian Post and Telecommunications Authority
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ITU-R Sg.8 Seminar The Global Maritime Distress and Safety System (GMDSS). Eirik Bliksrud Norwegian Post and Telecommunications Authority. The (Future) Global Maritime Distress and Safety System. Planned in the -70s/-80s to replace morse: Automatic, not manual - PowerPoint PPT Presentation
Transcript of ITU-R Sg.8 Seminar The Global Maritime Distress and Safety System (GMDSS)
ITU-R Sg.8 Seminar
The Global Maritime Distress and Safety System
(GMDSS)
Eirik BliksrudNorwegian Post and
Telecommunications Authority
The (Future) Global Maritime Distress and Safety System
Planned in the -70s/-80s to replace morse:
Automatic, not manual
New technology: digital modulationsatellite systems
Fulfil 9 functional requirements wherever it is
Alert shore and shipsCommunicateBe locatedReceive safety information
Sea areasA1: VHF - Line of sight
A2: MF - Ground wave
A3: Inmarsat – GSO
A4: HF - Reflections
Radiosystems in the GMDSSVHF, MF and HF: DSC, voice, dataInmarsat: Voice, data, nav.infoNAVTEX: Nav. InformationCOSPAS-SARSAT: EPIRBs
Digital Selective Calling (DSC)Call individual or groups of stationsDistress, safety, routine callsContains identity, position and other info
100/1200 b/s Time diversity
WRC-07Agenda 1.14: Review of the GMDSS
Listening watch on ch. 16Digitalisation of VHF (Appendix 18)
Digitalisation of HFNew data systems: HF internet
New systems in GMDSS?New satellite systems ?IMT-2000 ?
CoveragePriorityPouting to RCCGlobally implementedOn-scene communications
GMDSSNot so fancyNot so modern
Serves well, saves livesSimple, robust systems/equipmentTrue global compatibilityStill not fully implemented
Changes are slow to implement
