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Manual on Hydrography

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Manual on Hydrography INTERNATIONAL HYDROGRAPHIC ORGANIZATION MANUAL ON HYDROGRAPHY Publication C-13 1st Edition May 2005 (Corrections to February 2011) PUBLISHED BY THE INTERNATIONAL HYDROGRAPHIC BUREAU M O N A C O INTERNATIONAL HYDROGRAPHIC ORGANIZATION MANUAL ON HYDROGRAPHY Publication C-13 1st Edition May 2005 (Corrections to February 2011) Published by the International Hydrographic Bureau 4, Quai Antoine 1er B.P. 445 - MC 98011 MONACO Cedex Principauté de Monaco Telefax: (377) 93 10 81 40 E-mail: [email protected] Web: www.iho.int © Copyright International Hydrographic Organization [2010] 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 Bureau (IHB). 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. 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 IHB and any other copyright holders. 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: “Material from IHO publication *reference to extract: Title, Edition] is reproduced with the permission of the International Hydrographic Bureau (IHB) (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.” “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.” The IHO Logo or other identifiers shall not be used in any derived product without prior written permission from the IHB. i PREFACE The IHO Manual on Hydrography general objective is to provide knowledge on the concepts involved in hydrography as well as guidance to plan and execute hydrographic surveys. The Manual is considered to be a professional guide for hydrographic surveyors and a tool for teachers and students involved in hydrographic courses or programs. The preparation of this Manual started after the majority of IHO Member States (MS) responded in favour of proceeding with a project that could result in a Hydrographic Manual (1999). The IHB proposed then the establishment of a Working Group that met for the first time at the IHB premises, 20-22 June 2001, where the Table of Contents was agreed; Team Leaders were identified to deal with specific subjects, being responsible for the compilation of experts’ contributions, and a work program was defined. In 2004 a second meeting took place to review the result obtained and decide on a draft version of the Manual. After collecting comments from MS, the final version was prepared and the IHO Manual on Hydrography was published. The Manual is considered to be a worthy product that contributes to the mission of the IHO, whose objectives are: • The co-ordination of the activities of national hydrographic offices; • The greatest possible uniformity in nautical charts and documents; • The adoption of reliable and efficient methods of carrying out and exploiting hydrographic surveys; • The development of the sciences in the field of hydrography and the techniques employed in descriptive oceanography. It has to be acknowledged that several Hydrographic Offices (HO) have made great efforts in preparing and keeping up to date their version of a Hydrographic Manual, almost since their establishment, but the resources, both, in time and manpower required for this activity have precluded several HOs from continuing this practice, thus agreeing in the need to co-operate and co-ordinate the efforts for the preparation of an IHO Hydrographic Manual. A Manual that could be useful to everybody, containing specific aspects on hydrography and other matter only in general terms, as they are much more thoroughly covered in existing textbooks which refer to them in considerably greater detail. The content of this Manual is divided into seven chapters: • Chapter 1 refers to the principles of hydrographic surveying, including its specifications; • Chapter 2 refers to positioning; • Chapter 3 to refers to depth determination, including both the principles and techniques used; • Chapter 4 provides information on sea floor classification and object detection; • Chapter 5 refers in particular to water levels and flow; • Chapter 6 is devoted to topographic surveying applied to hydrography; • Chapter 7 provides, in a structured way, complete details on hydrographic practice; • Annexes with Acronyms, Bibliography and other relevant information. C-13 ii It is the IHB responsibility to keep this Manual up dated, following inputs from MS and other organisations who are encouraged to provide the IHB with relevant information in this regard. If needed, the IHB will request the advice of the FIG/IHO/ICA International Advisory Board on Standards of Competence for Hydrographic Surveyors and Nautical Cartographers, on the best way to include new material and/or organise the relevant chapter(s). The IHB will keep the digital version of this Manual on the IHO web page and will print hard copies on demand. With the assistance of readers and of Member States, the IHB will aim to maintain this publication on a regular basis.. The IHB is particularly grateful to Admiral Ritchie of the United Kingdom for his encouragement and support in writing the Introduction to this Manual. The IHB would like to thank the following principal authors for their efforts in preparing the final text, whilst acknowledging that they were ably assisted by many others who remain unnamed: Capt Muhammad ZAFARYAB (Pakistan), Cdr Lamberto LAMBERTI (Italy), Lt Antonio DI LIETO (Italy), Lt Cdr Paul LAWRENCE (UK), Lt Cdr Fernando ARTILHEIRO (Portugal), Lt Cdr Peter JOHNSON (Australia), Cdr Jerry MILLS (USA), Mr Stephen GILL (USA), Mr Federico MAYER (Argentina), Mr Hector SALGADO (Argentina), Lt Cdr Bob WILSON (UK) and Lt Cdr David WYATT (UK). __________ C-13 iii TABLE OF CONTENTS PREFACE .................................................................................................................................... i INTRODUCTION ................................................................................................................................. 1 Brief history of hydrography ................................................................................................................. 1 Importance of hydrography ..................................................................................................................... 2 Fields of competence associated with hydrography................................................................................ 3 CHAPTER 1 “PRINCIPLES OF HYDROGRAPHIC SURVEYING” ........................................... 7 1. Introduction .............................................................................................................................. 7 2. Hydrographic Surveying ......................................................................................................... 8 2.1 Survey Specifications ................................................................................................... 8 2.2 Survey Planning ............................................................................................................ 9 2.3 Data Gathering ............................................................................................................ 13 2.4 Data Processing ........................................................................................................... 13 2.5 Data Analysis .............................................................................................................. 15 2.6 Data Quality ................................................................................................................ 16 2.7 Data Quality - Presentation ......................................................................................... 17 2.7.1 Chart Reliability Diagrams ............................................................................ 17 2.7.2 Zone of Confidence (ZOC) ............................................................................ 17 2.8 Data Production .......................................................................................................... 21 2.9 Nautical Information System (NIS) ............................................................................ 22 2.9.1 Compilation Process ................................................................................... 24 2.9.2 Presentation ................................................................................................ 26 Annex A – Acronyums ...................................................................................................................
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