Estabilidad Maritima

Ship Stability for Masters and Mates

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Ship Stability for Masters and Mates
Sixth edition – Consolidated 2006

Revised by Dr C.B. Barrass M.Sc C.Eng FRINA CNI

By Captain D.R. Derrett

AMSTERDAM BOSTON HEIDELBERG LONDON NEW YORK OXFORD PARIS SAN DIEGO SAN FRANCISCO SINGAPORE SYDNEY TOKYO

Butterworth-Heinemann An imprint of Elsevier Ltd LinacreHouse, Jordan Hill, Oxford OX2 8DP 30 Corporate Road, Burlington, MA 01803 First published by Stanford Maritime Ltd 1964 Third edition (metric) 1972 Reprinted 1973, 1975, 1977, 1979, 1982 Fourth edition 1984 Reprinted 1985 Fourth edition by Butterworth-Heinemann Ltd 1990 Reprinted 1990 (twice), 1991, 1993, 1997, 1998, 1999 Fifth edition 1999 Reprinted 2000 (twice), 2001, 2002, 2003, 2004 Sixthedition 2006 Copyright © 2006, Elsevier Ltd. All rights reserved No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means electronic, mechanical, photocopying, recording or otherwise without the prior written permission of the publisher Permission may be sought directly from Elsevier’s Science & Technology Rights Department in Oxford, UK:phone ( 44) (0) 1865 843830; fax ( 44) (0) 1865 853333; email: permissions@elsevier.com. Alternatively you can submit your request online by visiting the Elsevier web site at http://elsevier.com/locate/permissions, and selecting Obtaining permission to use Elsevier material Notice No responsibility is assumed by the publisher for any injury and/or damage to persons or property as a matter ofproducts liability, negligence or otherwise, or from any use or operation of any methods, products, instructions or ideas contained in the material herein. Because of rapid advances in the medical sciences, in particular, independent verification of diagnoses and drug dosages should be made British Library Cataloguing in Publication Data A catalogue record for this book is available from the BritishLibrary Library of Congress Cataloguing in Publication Data A catalogue record for this book is available from the Library of Congress ISBN 13: 987-0-7506-6784-5 ISBN 10: 0-7506-6784-2 For information on all Butterworth-Heinemann publications visit our web site at www.books.elsevier.com Typeset by Charon Tec Ltd, Chennai, India www.charontec.com Printed and bound in Great Britain

ContentsAcknowledgements ix Preface xi Introduction xiii

Part 1 Linking Ship Stability and Ship Motions 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Forces and moments 3 Centroids and the centre of gravity 11 Density and specific gravity 21 Laws of flotation 24 Group weights, water draft, air draft and density 34 Transverse statical stability 44 Effect of free surface of liquids onstability 51 TPC and displacement curves 56 Form coefficients 62 Simpson’s Rules for areas and centroids 69 Second moments of area – moments of inertia 94 Calculating KB, BM and metacentric diagrams 103 Final KG plus twenty reasons for a rise in G 118 Angle of list 124 Moments of statical stability 134 Trim or longitudinal stability 143 Stability and hydrostatic curves 172 Increase in draft due tolist 189 Water pressure 194 Combined list and trim 198 Calculating the effect of free surface of liquids (FSE) 202 Bilging and permeability 213 Dynamical stability 227 Effect of beam and freeboard on stability 233 Effects of side winds on stability 236

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Contents

26 Icing allowances plus effects on trim and stability 239 27 Type A, Type B and Type (B-60) vessels plus FL and PL curves (asgoverned by DfT regulations) 243 28 Load lines and freeboard marks 248 29 Timber ship freeboard marks 261 30 IMO Grain Rules for the safe carriage of grain in bulk 266 31 Angle of loll 276 32 True mean draft 281 33 The inclining experiment plus fluctuations in a ship’s lightweight 286 34 The calibration book plus soundings and ullages 293 35 Drydocking and grounding 301 36 Liquid pressure and...