Ship Stability OOW

A clear, instructive guide to ship stability for anyone studying to become certified to Officer of the Watch (OOW) level, this text, with easy-to-follow worked examples and numerous self-assessment questions, is essential when studying for exams. This comprehensive title covers the ship stability knowledge required for certification to OOW level (STCW). Outlining the syllabus requirements of the current SQA examination and HNC level units required for this qualification, it is designed to cover the subject matter in a straightforward, easy-to-follow way.

About the Author

Martin Rhodes is a well-known lecturer on ship stability. His book is written in an accessible style, logically guiding students through the subject to support their understanding and exam preparation.

Table of Contents

SECTION 1 – INTRODUCTION

SECTION 2 – BASIC PRINCIPLES

• Density, Mass and Volume
• The Laws of Flotation
• Simple box-shaped vessel calculations
• Tutorial Questions

SECTION 3 – FORM COEFFICIENTS

• Coefficient of fineness of the water-plane area (Cw)
• Block Coefficient (Cb)
• Midships Coefficient (Cm)
• Longitudinal Prismatic Coefficient (Cp)
• Tutorial Questions

SECTION 4 – TONNES PER CENTIMETRE IMMERSION

• TPC Formula
• Factors affecting TPC
• Interpolation of hydrostatic data
• Load/Discharge problems
• Tutorial Questions

SECTION 5 – LOAD LINES

• Factors for consideration in assigning a freeboard
• Type ‘A’ and Type ‘B’ ships
• Load Line dimensions
• Fresh Water Allowance (FWA)
• Dock Water Allowance (DWA)
• Load Line Calculations
• Tutorial Questions

SECTION 6 – CENTRE OF GRAVITY (G) AND CENTRE OF BUOYANCY (B)

• Centre of Gravity
• Effects of shifting, loading, and discharging weights
• Multiple weight problems
• Centre of Buoyancy
• Tutorial Questions

SECTION 7 – TRANSVERSE STATICAL STABILITY

• Righting Lever (GZ) and Righting Moment
• Initial Transverse Metacentre
• Metacentric Height (GM)
• Calculating Righting Moment at small angles
• Tutorial Questions

SECTION 8 – CONDITIONS OF STABILITY

• Stable, Neutral, and Unstable Conditions
• Angle of Loll
• Tutorial Questions

SECTION 9 – INITIAL TRANSVERSE METACENTRE

• Calculating KM for a box-shaped vessel
• Metacentre Diagram
• Factors affecting KM
• Tutorial Questions

SECTION 10 – FREE SURFACE EFFECT

• Effects on stability and calculations
• Free Surface Moments
• Influencing Factors
• Tutorial Questions

SECTION 11 – CURVES OF STATICAL STABILITY (GZ CURVES)

• Constructing and interpreting GZ curves
• Curves for stiff and tender ships
• Tutorial Questions

SECTION 12 – LIST

• Calculating list due to weight shifts
• Correcting list conditions
• Multiple weight problems
• Effects of Free Surface
• Tutorial Questions

SECTION 13 – CURVES OF STATICAL STABILITY FOR VARYING CONDITIONS

• Stable, Neutral, and Unstable Conditions
• Correcting an Angle of Loll
• Tutorial Questions

SECTION 14 – SUSPENDED WEIGHTS

• Effects on KG and List
• Loading and Discharging Calculations
• Tutorial Questions

SECTION 15 – INTRODUCTION TO TRIM

• Draught Marks, Trim, and Change of Trim
• Moment to Change Trim by One Centimetre (MCTC)
• Longitudinal Centre of Flotation (LCF)
• Effects of Loading, Discharging, and Weight Shifts
• Tutorial Questions

SECTION 16 – TRIM USING HYDROSTATIC DATA

• True Mean Draught and Displacement
• Calculations using Hydrostatic Data
• LCB and LCG Considerations
• Tutorial Questions

SECTION 17 – INCLINING EXPERIMENT

• Calculating KG and Displacement
• Precautions for Accuracy
• Tutorial Questions

SECTION 18 – ASSESSING COMPLIANCE WITH IMO STABILITY CRITERIA

• Simpson’s Rules
• Intact Stability and Curve Areas
• Tutorial Questions

SECTION 19 – PRACTICAL SHIP LOADING PROBLEMS

• Loading Sheet Data
• Practical Load Problem
• Tutorial Questions