Description

Ship Stability Dokmar is a practical stability guide for seafarers designed to explain ship stability in a clear and approachable way. It helps readers understand why stability matters for the safety of the ship, the crew, and the environment, while making even detailed topics easier to follow.

Ship Stability Dokmar is a practical stability guide for seafarers created for readers who need a clearer understanding of how ship stability works in real operations. It explains stability principles in an accessible way while still covering the technical foundations needed to understand flotation, buoyancy, displacement, trim, list, and the movement of the centre of gravity.

This ship stability dokmar title covers a wide range of topics including transverse stability, draft and trim calculations, damage stability, stability while underway, heavy-weather guidance, drydocking, running aground, special ship types, and stability software. As a stability guide for seafarers, it supports both foundational learning and practical onboard understanding.

Why This Ship Stability Dokmar Is a Valuable Stability Guide for Seafarers

Stability is one of the core subjects behind safe ship operation, but it is often seen as more difficult than it needs to be. This ship stability dokmar guide is valuable because it explains complex ideas clearly, helping readers understand not only the theory but also the operational consequences of loading, free surface effects, trim, damage, wind, and motion at sea.

Because it is written as a stability guide for seafarers, it is useful for readers with little previous background as well as those who need a stronger practical understanding of calculations, regulations, and safe operating judgement. It is especially relevant for deck officers, cadets, and anyone involved in loading, voyage planning, or stability checks onboard.

Readers may also find useful Ship Stability Strength and Loading Principles, Second Edition, Ship Stability Mates/Masters – 1st Edition, Navigation for Masters – Fourth Edition Book, Bridge Procedures Guide – Sixth Edition Book, Ship Squat and Interaction, and Ship Manoeuvring Principles and Pilotage Book.

Who Should Read This Ship Stability Dokmar and Stability Guide for Seafarers?

This ship stability dokmar title is ideal for cadets, deck officers, Masters, and maritime students who need a practical stability guide for seafarers that explains stability clearly without losing technical depth.

Whether used for study, certificate preparation, or onboard reference, it provides a strong foundation for understanding the stability issues that affect safe loading and ship operation.

 

Contents Listing  

1. INTRODUCTION

1.1 Introduction 

1.1.1 Definition of stability 

1.1.2 Why define stability? Forces and moments 

1.1.3 Importance of stability 

1.1.4 Important factors for stability 

1.1.5 Who is responsible for stability? 

1.2. Vectors, forces (F, f ), moments (m) and units 

1.2.1 Explanation of terms 

1.2.2. Effect of a force 

1.2.3. Moments examples 

1.2.4 Forces and moments examples 

1.2.5 Volume 

1.2.6 Density (ρ) and specific weight (γ) 

1.3 Flotation 

1.3.1 Archimedes 

1.4 Displacement 

1.4.1 Establishing the displacement 

1.5 (Reserve) buoyancy 

1.6 Displacement of volume 

1.6.1 Dimensions 

1.7 Volumes and weights 

1.8 Hull forms (Lines plan) 

1.9 The shape of the ship 

1.9.1 Hull form coefficients 

1.10 Bonjean curves 

1.11 Positions of the ship 

1.12 Proportions 

1.13 General arrangement 

1.14 Plimsoll and deck line 

1.14.1 Loadlines 

1.14.2 Ships carrying timber deck cargo 

1.14.3 Dredgers 

1.14.4 International Convention on Load Lines 

1.15 Relationship between the observed draft and displacement 

1.15.1 Tons / cm 

1.16 Permanent marks on the ships’ shell plating 

1.17 Chart of zones and seasonal areas 

Exercises 

1.18 Reference points explained 

1.18.1 Point K 

1.18.2 Point B 

1.18.3 Point G 

1.18.4 Point M and N 

1.19 Calculation of the initial position of point M 

1.19.1 KM versus draft (T) 

1.20 Abbreviations used 

1.21 Form and weight stability 

1.21.1 Form stability 

1.21.2 Weight stability 

1.22 Relation between buoyancy and gravity 

1.22.1 Ship in equilibrium in calm water 

1.22.2 The ship on a sloping water surface. 

2. TRANSVERSE STABILITY

2.1 General 

2.1.1 Height of G above the keel 

2.2 Determination of G 

2.2.1 Conservation of momentum 

2.2.2 Final moment 

2.2.3 Movement of centre of gravity 

2.2.4 Horizontal movement of G 

2.2.5 Consequences of incorrect loading 

2.2.6 Stiff and tender ship 

2.3 Inclining experiment 

2.4 Oscillation test 

Exercises 

2.5 Curve of static stability 

2.5.2 The righting arm 

2.5.3 Determining the righting arm GZ 

2.5.4 The design of the curve 

2.5.5 Determining the area under the curve 

2.6 Stability regulations 

2.6.1 Stability regulations for all ships 

2.6.2 Examples of unacceptable stability curves 

2.6.3 Exceptions to stability criteria 

Exercises 

2.7 Comparison of ships’ forms 

2.8 KG max 

2.9 List 

2.9.1 Shifting of a weight 

2.9.2 Free surface correction 

Exercises 

2.9.3 Heavy lift 

2.9.4 Bulk cargo 

Exercises 

2.9.5 Effect of wind on the ship 

2.9.6 Effect of wind on stability 

2.9.7 Heel due to turning 

2.9.8 Summary 

2.10 Mathematical explanation of the stability curve 

2.10.1The wall sided formula 

3. DRAFT AND TRIM CALCULATIONS

3.1. Draft and trim calculations 

3.1.1 The waterline’s Centre Of Flotation (COF) 

3.1.2 Moment to change trim per unit 

3.2. Calculation of trim 

3.2.1 Determining trim difference with weights 

3.2.2 Determining trim difference of total ship 

3.2.3. Distribution of trim forward and aft 

3.3 Corrections to the draft readings 

3.4 Draft survey 

3.4.1 Reading the draft 

3.4.2 Correcting the draft 

3.4.3 Hogging, sagging and torsion 

3.4.4 Trim corrections (first + second trim corr.) 

3.5 Squat 

Exercises 

4. DAMAGE STABILITY

4.1. Introduction 

4.2. Evolving points regarding damage stability 

4.2.1 Floodable length 

4.2.2 Deterministic damage stability 

4.2.3 Probabilistic damage stability 

4.3. Calculation methods due to damage 

4.3.1 Constant displacement 

4.3.2 Loaded weight 

4.4. Determining damage stability 

4.4.1 Damage stability prognosis for the actual voyage 

4.4.2 Damage stability calculations 

5. STABILITY WHILE UNDERWAY

5.1 Introduction 

5.2 Dynamic stability while underway 

5.3 Loss of quasi-static stability 

5.4 Loss of dynamic stability 

5.4.1 Dynamic rolling with coupled ship motions 

5.4.2 Parametric rolling 

5.4.3 Resonant rolling 

5.4.4 Impact excitation 

5.5 Broaching 

5.5.1 Overtaking waves (low speed) 

5.5.2 Low frequency, large amplitude yaw motions 

5.5.3 Broaching caused by a single wave 

5.5.4 Surfing of the ship 

5.5.5 Surfing and bow diving 

5.5.6 Surf on the front slope of a steep wave 

5.5.7 Coupled pitch, roll and yaw instability at high speed 

5.5.8 Dynamic stability assessment 

5.6. Heavy-weather guidance 

6. DRYDOCKING / RUNNING AGROUND

6.1 Ship stability while docking 

6.2 Running aground 

7. SPECIAL TYPES OF SHIPS

7.1 Sailing vessels 

7.1.1 Stability of sailing vessels 

7.1.2 Stability in relation to hull form 

7.1.3 Damping effect of the sails 

7.1.4 Stability requirements 

7.1.5 Active stability 

7.2 Catamarans / swath 

7.2.1 Catamarans 

7.2.2 Swath 

7.3 Crane ships 

7.4 Fishing vessels 

7.5 Supply ships 

7.6 Dredging vessels 

7.6.1 The process and characteristics of stability 

7.7 Submersible pontoon 

7.8 Submarines 

8. STABILITY SOFTWARE

8.1 Introduction and history 

8.2 Arithmetic functions 

8.3 Tools within loading software 

8.3.1 Loading tools 

8.3.2 Loading assessment according to regulations 

8.4 Standards and requirements 

8.4.1 Hardware regulations 

8.5 Examples of loading software 

Questions:, general 

Exercises 

Index 

Abbreviations 

Credits: photographs and illustrations 

This ship stability dokmar title is a practical stability guide for seafarers who need to understand one of the most important foundations of safe ship operation. By combining clear explanation with real operational topics, it helps readers approach stability with more confidence, accuracy, and practical awareness.

Frequently Asked Questions

What is this ship stability dokmar book used for?

It is used as a stability guide for seafarers to explain practical ship stability, trim, loading, damage stability, and related operational topics.

Does this stability guide for seafarers cover trim and draft calculations?

Yes, this ship stability dokmar title includes draft and trim calculations, draft survey corrections, squat, and related practical topics.

Who should read this ship stability dokmar book?

It is suitable for cadets, deck officers, Masters, maritime students, and anyone involved in ship loading or stability understanding.

Does it include damage stability and heavy-weather guidance?

Yes, this stability guide for seafarers covers damage stability, stability while underway, parametric rolling, broaching, and heavy-weather guidance.

Is it suitable for readers without a strong stability background?

Yes, the book is presented in a clear and approachable way while still covering the subject in useful depth.