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chapter 1 introductions to the gmdss 1.1 basic knowledge of gmdss 1.2 sub-systems of gmdss 1.3 gmdss functions 1.4 gmdss requirements 1.5 availability of ship station equipmentchapter 2 terrestrial communication system 2.1 introduction 2.2 radiotelephone procedures 2.3 radiotelex(nbdp) 2.4 the digital selective calling(dsc) sub-systemchapter 3 inmarsat communication system 3.1 the introduction to inmarsat 3.2 inmarsat-c systems 3.3 inmarsat-m/b systems 3.4 inmarsat fleet f77 systems 3.5 inmarsat services 3.6 operational principles of the inmarsatchapter 4 promulgation of maritime safety information(msi) 4.1 definitions of msi 4.2 navtex service 4.3 inmarsat egc services 4.4 world-wide navigational warning services(wwnws) chapter 5 distress, urgency and safety communications 5.1 general introduction 5.2 distress services 5.3 urgency services 5.4 safety services 5.5 search and rescue radar transponder(sarts) 5.6 cospas-sarsat systemchapter 6 special services 6.1 ship reporting systems 6.2 search and rescue(sar) 6.3 psc inspection on gmdss 6.4 requirements of the radio logbookchapter 7 extracts from solas and itu regulations 7.1 solas chapter iv,c-ship requirements 7.2 itu-radio regulationsappendix