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It places S-44 within the broader IHO standards framework and describes the historical evolution from the 1st edition published in 1968 through later editions. The contents organize survey scope by safety classification, positioning, bathymetry and bottom characteristics, water levels and flow, metadata, and specification tables, with annexes providing additional guidance for quality and grid-based bathymetry.",{"@graph":69,"@context":123},[70,84,106],{"@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":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/s-44-edition-6-adopted/273254/",{"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/s-44-edition-6-adopted/273254.png","ImageObject",300,407,{"name":92,"@type":93},"Connor ","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-21","2026-09-15",true,{"@type":102,"interactionType":103,"userInteractionCount":105},"InteractionCounter",{"@type":104},"ViewAction",13,{"@type":107,"mainEntity":108},"FAQPage",[109,115,119],{"name":110,"@type":111,"acceptedAnswer":112},"What is the purpose of IHO Publication S-44 for hydrographic surveys?","Question",{"text":113,"@type":114},"S-44 defines the standard applicable to hydrographic surveys, aiming to improve safety of navigation, hydrographic knowledge, and protection of the marine environment.","Answer",{"name":116,"@type":111,"acceptedAnswer":117},"When was the first edition of S-44 published, and how has it evolved?",{"text":118,"@type":114},"The 1st edition was published in January 1968. Four successive editions followed: 2nd (1982), 3rd (1987), 4th (1998), and 5th (2008).",{"name":120,"@type":111,"acceptedAnswer":121},"What main topics are covered across the chapters of this standard?",{"text":122,"@type":114},"The chapters cover safety classification, horizontal and vertical positioning, depth and bathymetry (including bottom nature), water levels and flow, surveys above the vertical datum, metadata, and tables/specification matrix, with annex guidance on quality management and grid considerations.","https://schema.org",{"og:url":83,"og:type":125,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":127,"canonical":83},"index,follow",{"doc_id":129,"site_id":62},273254,1789470420,{"code":4,"msg":5,"data":132},{"doc_id":129,"user_id":133,"nickname":92,"user_avatar":134,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":135,"file_id":136,"file_url":137,"file_type":138,"file_size":139,"view_count":105,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":31,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":130,"read_time":144,"preview_page_count":4},687207022233,"https://ap-avatar.wpscdn.com/davatar_155a257f0dc6eb9ab79c44ca47cae57d","S-44 Edition 6.2.0  \nInternational Hydrographic Organization Standards for Hydrographic Surveys  \nPublished by the  \nInternational Hydrographic Organization 4b quai Antoine 1er Principauté de Monaco Tel: (377) [93.10.81.00](93.10.81.00)  \nFax: (377) [93.10.81.40](93.10.81.40)[ ](93.10.81.40)[info@iho.int](info@iho.int)[ ](info@iho.int)[www.iho.int](www.iho.int)  \n\n| © Copyright International Hydrographic Organization 2024 |\n| --- |\n| This work is copyright. Apart from any use permitted in accordance with the Berne Convention for the Protection of Literary and Artistic Works (1886), and except in the circumstances described below, no part may be translated, reproduced by any process, adapted, communicated or commercially exploited without prior written permission from the International Hydrographic Organization (IHO) . Copyright in some of the material in this publication may be owned by another party and permission for the translation and/or reproduction of that material must be obtained from the owner. |\n| This document or partial material from this document may be translated, reproduced or distributed for general information, on no more than a cost recovery basis. Copies may not be sold or distributed for profit or gain without prior written agreement of the IHO and any other copyright holders. |\n| In the event that this document or partial material from this document is reproduced, translated or distributed under the terms described above, the following statements are to be included: |\n| “Material from IHO publication [reference to extract: Title, Edition] is reproduced with the permission of the Secretariat of the International Hydrographic Organization (IHO)(Permission No  / ) acting for the International Hydrographic Organization (IHO), which does not accept responsibility for the correctness of the material as reproduced: in case of doubt, the IHO’s authentic text shall prevail. The incorporation of material sourced from IHO shall not be construed as constituting an endorsement by IHO of this product.” |\n| “This [document/publication] is a translation of IHO [document/publication][name]. The IHO has not checked this translation and therefore takes no responsibility for its accuracy. In case of doubt the source version of [name] in [language] should be consulted.”\u003Cbr>The IHO Logo or other identifiers shall not be used in any derived product without prior written permission from the IHO. |\n\nCONTENTS  \nPREFACE ......................................................................................................................................... v  \n[INTRODUCTION](INTRODUCTION................................................................................................................................ vi)[................................................................................................................................ vi](INTRODUCTION................................................................................................................................ vi)  \n[GLOSSARY](GLOSSARY ...............................................................................................)[ ...............................................................................................](GLOSSARY ...............................................................................................)..................................... viii  \nCHAPTER 1 CLASSIFICATION OF SAFETY OF NAVIGATION SURVEYS............................................ 1  \nCHAPTER 2 HORIZONTAL AND VERTICAL POSITIONING ................................................................ 3  \nCHAPTER 3 DEPTH, BATHYMETRIC COVERAGE, FEATURES, AND NATURE OF THE BOTTOM ....... 5  \nCHAPTER 4 WATER LEVELS AND FLOW ......................................................................................... 11  \nCHAPTER 5 SURVEYS ABOVE THE VERTICAL DATUM .................................................................... 12  \nCHAPTER 6 METADATA...........................","cbCaivcIUNKj8KiS","https://ap.wps.com/l/cbCaivcIUNKj8KiS","pdf",996483,"English","# Preface\n## Historical development and purpose\n# Contents\n## Chapter 1 Classification of safety of navigation surveys\n## Chapter 2 Horizontal and vertical positioning\n## Chapter 3 Depth, bathymetric coverage, features, and nature of the bottom\n## Chapter 4 Water levels and flow\n## Chapter 5 Surveys above the vertical datum\n## Chapter 6 Metadata\n## Chapter 7 Tables and specification matrix\n## Annex A Specification matrix guidance\n## Annex B Guidelines for quality management\n## Annex C Guidance for a priori and a posteriori quality control\n## Annex D Gridded bathymetry considerations","[{\"question\":\"What is the purpose of IHO Publication S-44 for hydrographic surveys?\",\"answer\":\"S-44 defines the standard applicable to hydrographic surveys, aiming to improve safety of navigation, hydrographic knowledge, and protection of the marine environment.\"},{\"question\":\"When was the first edition of S-44 published, and how has it evolved?\",\"answer\":\"The 1st edition was published in January 1968. Four successive editions followed: 2nd (1982), 3rd (1987), 4th (1998), and 5th (2008).\"},{\"question\":\"What main topics are covered across the chapters of this standard?\",\"answer\":\"The chapters cover safety classification, horizontal and vertical positioning, depth and bathymetry (including bottom nature), water levels and flow, surveys above the vertical datum, metadata, and tables/specification matrix, with annex guidance on quality management and grid considerations.\"}]","S-44 - Edition 6 - adopted | PDF",126]