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It covers maritime safety information and SAR-related information, operational procedures, and administrative and technical matters such as carriage requirements, performance standards, polar operations, maintenance, radio personnel, station identities, and GMDSS frequencies. The manual also outlines search and rescue frameworks and includes related annexes referencing SOLAS and IMO/ITU instruments.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":30,"@type":76,"position":81},"https://docshare.wps.com/document/technology/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/global-maritime-distress-and-safety-system-eleventh-edition-2024-edition/661992/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/global-maritime-distress-and-safety-system-eleventh-edition-2024-edition/661992.png","ImageObject",300,407,{"name":92,"@type":93},"Grenda","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-30","2026-10-28",true,{"@type":102,"interactionType":103,"userInteractionCount":19},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What is the scope of the GMDSS manual’s guidance?","Question",{"text":112,"@type":113},"It covers the GMDSS’s basic concepts, communication systems and equipment, maritime safety information and SAR-related information, and operational procedures. It also includes other operational and administrative matters such as equipment carriage requirements, performance standards, maintenance, and frequencies used in the GMDSS.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"Which parts address communications and information services used in the GMDSS?",{"text":117,"@type":113},"Part 3 focuses on communications systems and equipment, including terrestrial and satellite-based communications. Part 4 focuses on maritime safety information and SAR-related information, including International NAVTEX service and other MSI-related topics.",{"name":119,"@type":110,"acceptedAnswer":120},"How does the manual handle search and rescue (SAR) topics?",{"text":121,"@type":113},"Part 7 provides the SAR framework, including general guidance, shore-based SAR communication network, and SAR procedures triggered by receiving distress alerts. 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replacement or substitutefor the ITU \"Manual for Use by the Maritime Mobile and MaritimeMobile-Satellite Services\"or any other publication required to becarried on board a ship by the Radio Regulations or any otherinternational convention.  \nFist published (as GMDSS Handbook)in 1992 by theINTERNATIONAL MARITIME ORGANIZATION4 Albert Embankment,London SE17SR,United Kingdomwww.imo.org  \nEleventh edition,2024  \nISBN:978-92-801-1770-7  \n\n| IMO PUBLICATION   |\n| --- |\n| Sales number:IJ970E   |\n\nCopyright CInternational Maritime Organization,2024  \nAll rights reserved.No part of this publication may be reproduced,stored in a retrieval system,or transmitted in anyform or by any means,without prior penmission in writing from theInternational Maritime Organization.  \nReproduction and/or translation rights may be available for this titleFor further details,please contact IMO Publishing at copyright@imo.org.  \nNote:ITUmaterials included in this publication have been reproduced,with the prior authorization of the publishers,from the ITUpublication Radio Regulations (2020 Edition).This publication can be ordereddirectly from the International Telecommunication Union,Sales and Marketing Division,Place des Nations,CH-1211 Geneva 20,Switzerland(www.itu.int/publications).  \nThis publication has been prepared from official documents of IMO,and every efforthas been made to eliminate errors and reproduce the original text(s)faithfully.Readersshould be aware that,in case of inconsistency,the official IMO text will prevail.Cover image(s)are for illustrative purposes and may not be technically accurate.  \nContents  \nForeword ……………………………………………………………………………………………………………………………………………………V  \nAbbreviations…………………………………………………………………………………………………………………………………………………vii  \nPart 1 Introduction………………………………………………………………………………………………………………………………1  \nPart 2 Basic concept of the GMDSS………………………………………………………………………………………………3  \n2.1 General…………………………………………………………………………………………………………………………………………………3  \n2.2 SOLAS chapter IV-Radiocommunications…………………………………………………………………………………4  \n2.3 Search and rescue………………………………………………………………………………………………………………………………4  \n2.4 Sea areas…………………………………………………………………………………………………………………………………4  \n2.5 Functional requirements for radiocommunications………………………………………………………………………5  \nPart 3 Communications systems and equipment used in the GMDSS………………………………9  \n3.1 Introduction…………………………………………………………………………………………………………………………………………9  \n3.2 Terrestrial communications………………………………………………………………………………………………………………9  \n3.3 Satellite-based communications…………………………………………………………………………………………………………15  \nPart 4 Maritime safety information and SAR-related information…………………………………………29  \n4.1 Introduction…………………………………………………………………………………………………………………………………………29  \n4.2 International NAVTEX service…………………………………………………………………………………………………………32  \n4.3 High frequency narrow-band direct printing…………………………………………………………………………………33  \n4.4 International enhanced group call service…………………………………………………………………………33  \n4.5 MSI-related documentation…………………………………………………………………………………………………………35  \nPart 5 Operational procedures for the GMDSS……………………………………………………………………………37  \nPart 6 Other operational and administrative matters………………………………………………………………41  \n6.1 GMDSS equipment carriage requirements……………………………………………………………………………………41  \n6.2 Equipment performance standards ……………………………………………………………………………………………………43  \n6.3 Operation in polar waters…………………………………………………………………………………………………………………44  \n6.4 Maintenance of equipment in the GMDSS………………………………………………………45  \n6.5 Radio personnel…………………………………………………………………………………………………………………………………45  \n6.6 Station identities…………………………………………………………………………………………………………………………………45  \n6.7 Frequencies used in the GMDSS……………………………………………………………………………………………………45  \n6.8 GMDSS Master Plan…………………………………………………………………………………………………………………45  \nPart 7 Search and rescue (SAR)…………………………………………………………………………………………………………47  \n7.1 General……………………………","cbCaiuqkWLweSTUQ","https://ap.wps.com/l/cbCaiuqkWLweSTUQ","pdf",15432436,494,"English","# Foreword\n# Abbreviations\n# Part 1 Introduction\n# Part 2 Basic concept of the GMDSS\n## General\n## SOLAS chapter IV-Radiocommunications\n## Search and rescue\n## Sea areas\n## Functional requirements for radiocommunications\n# Part 3 Communications systems and equipment used in the GMDSS\n## Introduction\n## Terrestrial communications\n## Satellite-based communications\n# Part 4 Maritime safety information and SAR-related information\n## Introduction\n## International NAVTEX service\n## High frequency narrow-band direct printing\n## International enhanced group call service\n## MSI-related documentation\n# Part 5 Operational procedures for the GMDSS\n# Part 6 Other operational and administrative matters\n## GMDSS equipment carriage requirements\n## Equipment performance standards\n## Operation in polar waters\n## Maintenance of equipment in the GMDSS\n## Radio personnel\n## Station identities\n## Frequencies used in the GMDSS\n## GMDSS Master Plan\n# Part 7 Search and rescue (SAR)\n## General\n## Shore-based SAR communication network\n## SAR procedures in response to the reception of distress alerts\n# Part 8 Non-GMDSS communications systems\n## Introduction\n## Automatic identification system\n## Ship security alert system\n## Long-range identification and tracking\n# Part 9 Ongoing work at IMO\n## Implementation of the BeiDou Message Service System\n## Interoperability and interconnectivity between recognized mobile satellite services\n## Revision of resolution A.1001(25)\n## Development of performance standards for NAVDAT\n## Introduction of VHF data exchange system\n## Further development of the e-navigation concept\n## Development of a goal-based instrument for maritime autonomous surface ships\n# Annex 1 GMDSS Master Plan\n# Annex 2 Regulations of the 1974 SOLAS Convention relevant to the GMDSS\n# Annex 3 IMO instruments relevant to the GMDSS\n# Annex 4 ITU instruments relevant to the GMDSS","[{\"question\":\"What is the scope of the GMDSS manual’s guidance?\",\"answer\":\"It covers the GMDSS’s basic concepts, communication systems and equipment, maritime safety information and SAR-related information, and operational procedures. It also includes other operational and administrative matters such as equipment carriage requirements, performance standards, maintenance, and frequencies used in the GMDSS.\"},{\"question\":\"Which parts address communications and information services used in the GMDSS?\",\"answer\":\"Part 3 focuses on communications systems and equipment, including terrestrial and satellite-based communications. Part 4 focuses on maritime safety information and SAR-related information, including International NAVTEX service and other MSI-related topics.\"},{\"question\":\"How does the manual handle search and rescue (SAR) topics?\",\"answer\":\"Part 7 provides the SAR framework, including general guidance, shore-based SAR communication network, and SAR procedures triggered by receiving distress alerts. It also supports related content through earlier GMDSS concept sections.\"}]","GLOBAL MARITIME DISTRESS AND SAFETY SYSTEM - Eleventh edition - 2024 edition | PDF",1245]