Navigation in Shallow Waters  (eBook)

Published Date

July 2017

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Navigation in Shallow Waters (eBook)

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This publication is a guide to ship handling in shallow waters and the differences that may be experienced when compared with deep water conditions. It contains theoretical and practical information for ships navigating in open water and in confined channels.

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This publication is a guide to ship handling in shallow waters. Drawing on feedback from full-size vessels and ship models, it examines the specific challenges that are experienced in ship performance when navigating in restricted waters. It uses worked examples to analyse risks and to highlight best practice techniques.


About the Authors

Author’s Note




Chapter 1 – Shallow Waters


Chapter 2 – Directional Stability


Chapter 3 – A Ship Navigating in a Channel


Chapter 4 – Squat


Chapter 5 – Effect of Current, Tide and Wind


Chapter 6 – The Ship Describing a Curved Path


Chapter 7 – Thrusters


Chapter 8 – Differences in Turning Moments for Different Ship Types


Chapter 9 – Physical Position of the Ship Handler


Chapter 10 – Factors Involved in Stopping a Moving Ship


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


Chapter 12 – Emergency Procedures in Ships


Chapter 13 – Embarking and Disembarking Pilots


Chapter 14 – Working Harbour Tugs


Chapter 15 – Rudders and Special Propellers


Chapter 16 – Twin Screw Ships


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

Appendix A


Appendix B


Reflections of an Experienced Ship Pilot




This publication, by Captain Eduardo Gilardoni and Captain Juan 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


Witherbys titles are developed using scripts developed by technical experts that are peer reviewed within work groups. Typically, they seek to improve understanding of the regulations, recommendations and guidelines issued by Industry.

Witherbys staff have significant expertise in the fields of navigation and hazardous cargoes as well as in the presentation of complex subjects in a graphic and easy to understand manner.

Eduardo Gilardoni

Captain Eduardo Gilardoni is a Master Mariner with more than 30 years’ seagoing experience. He is a recognised expert and author on navigation in restricted waters and accident investigation. He lectures on ship handling and naval architecture at Escuela Nacional de Náutica Manuel Belgrano in Argentina and is a member of the examination board for Master Mariners, River Plate and Parana Pilots’ exams. He is a LR certified lead auditor for ISM/ISO and ISPS.

Juan P Presedo

Captain Juan P Presedo is a Master Mariner and holds an MBA in Oil and Gas (Robert Gordon University) and a BSc in Marine Transportation. He is a specialist in LNG marine operations and is a LR certified ISP 9001/14001/18001 lead auditor, with experience in accident investigation, ISM/ISO/ISPS/navigation audits and ship to shore/ship to ship compatibility studies. He is a fellow of the Institute of Chartered Shipbrokers, an associated fellow of the Nautical Institute and has written frequently for shipping magazines and specialised nautical publications.

Title: Navigation in Shallow Waters (eBook)
Product Code: WS1421EA
Published Date: July 2017

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