ITUR Sg 8 Seminar The Global Maritime Distress

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 -70 s/-80 s to replace morse: Automatic, not manual New technology: digital modulation satellite systems

Fulfil 9 functional requirements wherever it is Alert shore and ships Communicate Be located Receive safety information

Sea areas A 1: VHF - Line of sight A 2: MF - Ground wave A 3: Inmarsat – GSO A 4: HF - Reflections

Radiosystems in the GMDSS VHF, MF and HF: DSC, voice, data Inmarsat: Voice, data, nav. info NAVTEX: Nav. Information COSPAS-SARSAT: EPIRBs

Digital Selective Calling (DSC) Call individual or groups of stations Distress, safety, routine calls Contains identity, position and other info 100/1200 b/s Time diversity

WRC-07 Agenda 1. 14: Review of the GMDSS Listening watch on ch. 16 Digitalisation of VHF (Appendix 18) Digitalisation of HF New data systems: HF internet

New systems in GMDSS? New satellite systems ? IMT-2000 ? Coverage Priority Pouting to RCC Globally implemented On-scene communications

GMDSS Not so fancy Not so modern Serves well, saves lives Simple, robust systems/equipment True global compatibility Still not fully implemented Changes are slow to implement