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Witherby Seamanship

ISBN 9781856096676

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Foreword

This publication,
by Captain Eduardo O. Gilardoni
and Captain Juan P. Presedo,
covers many aspects
of ship handling in shallow waters.

It contains theoretical and practical information
for ships navigating in open water and in confined channels.
The publication relates specifically to vessels in shallow waters
because feedback from full-size vessels and ship models has consistently shown
that ship performance is much less efficient in shallow water than in deep water.
It is, in effect, a risk analysis that examines possibilities of ship accidents
and discusses methods of prevention.

I am pleased to see numerous references in this publication to my work on squat and interaction,
and particularly as it is applied to the practical aspects of navigation and ship handling.
The authors aimed to cover a gap in the existing texts relating to ship handling in shallow waters
and the differences that Masters may experience when compared with deep water conditions.
They have certainly succeeded in doing so.

I strongly recommend this publication for those ashore and on board ship
and as an introduction for maritime students.
The text, methods, diagrams and equations are easy to follow and understand.
Finally, if you are a student, good luck in your maritime studies.
If you are either sea going or shore based,
best wishes for continued success in your chosen career.
I hope that this book will be informative and of value to you.

Dr C B Barrass MSc FRINA
International Maritime Consultant

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Contents

v – Foreword

vii – About the Authors

ix – Author’s Note

xi – Introduction

xvii – Abbreviations

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001 – Chapter 1 – Shallow Waters

007 – Chapter 2 – Directional Stability

015 – Chapter 3 – A Ship Navigating in a Channel

067 – Chapter 4 – Squat

087 – Chapter 5 – Effect of Current, Tide and Wind

105 – Chapter 6 – The Ship Describing a Curved Path

123 – Chapter 7 – Thrusters

139 – Chapter 8 – Differences in Turning Moments for Different Ship Types

143 – Chapter 9 – Physical Position of the Ship Handler

151 – Chapter 10 – Factors Involved in Stopping a Moving Ship

167 – Chapter 11 – Use of the Anchor as a Ship Handling Tool

175 – Chapter 12 – Emergency Procedures in Ships

179 – Chapter 13 – Embarking and Disembarking Pilots

185 – Chapter 14 – Working Harbour Tugs

225 – Chapter 15 – Rudders and Special Propellers

237 – Chapter 16 – Twin Screw Ships

249 – Chapter 17 – Commercial and Legal Considerations for Masters in Charge of Vessels Moving in Restricted Waters

263 – Appendix A

271 – Appendix B

277 – Reflections of an Experienced Ship Pilot

281 – Bibliography

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