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    Manufacturer: Witherbys

    Ship Stability OOW

    £25.00
    Reprint of the 2009 edition
    ISBN: 9781905331642
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    Author: Rhodes, Martin

    Published: August 2009

    Ship Stability OOW covers the syllabus requirements forming the underpinning ship stability knowledge required for certification to STCW 95 Officer of the Watch (OOW) level.

    Many students worry that they do not have the mathematical ability for ship stability calculations. This publication addresses this problem by covering the subject in the simplest way possible at a level appropriate for a learner studying either independently or at college. Worked examples and self-assessment questions are provided throughout with tutorial questions at the end of each section.

    CONTENTS:

    SECTION 1 INTRODUCTION

    SECTION 2 BASIC PRINCIPLES

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

    SECTION 3 FORM COEFFICIENTS

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

    SECTION 4 TONNES PER CENTIMETRE IMMERSION

    4.1 TPC Formula
    4.2 Factors affecting TPC
    4.3 Interpolation of hydrostatic data
    4.4 Load/Discharge problems
    Tutorial Questions


    SECTION 5 LOAD LINES

    5.1 Factors for consideration in assigning a freeboard
    5.2 Type A and Type B ships
    5.3 Load Line dimensions
    5.4 Fresh Water Allowance (FWA)
    5.5 Dock Water Allowance (DWA)
    5.6 Load Line Calculations
    Tutorial Questions


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

    6.1 Centre of Gravity
    6.2 Effect of shifting a weight already onboard
    6.3 Effect of loading a weight
    6.4 Effect of discharging a weight
    6.5 Multiple weight problems
    6.6 Centre of buoyancy (B)
    Tutorial Questions


    SECTION 7 TRANSVERSE STATICAL STABILITY

    7.1 Transverse Statical Stability
    7.2 Righting Lever (GZ)
    7.3 Moment of statical stability (Righting Moment)
    7.4 Initial Transverse Metacentre
    7.5 Metacentric Height (GM)
    7.6 Calculating the Righting Moment at small angles of heel tutorial questions


    SECTION 8 CONDITIONS OF STABILITY

    8.1 Stable Condition
    8.2 Neutral Condition
    8.3 Unstable condition and angle of loll
    Tutorial Questions


    SECTION 9 INTIAL TRANSVERSE METACENTRE

    9.1 Initial Transverse metacentre explained
    9.2 Calculating KM for a box shaped vessel
    9.3 Use of the metacentre diagram
    9.4 To determine the final KG required completing loading with a required GM
    9.5 Factors affecting KM
    Tutorial Questions


    SECTION 10 FREE SURFACE EFFECT

    10.1 Free surface effect and transverse statical stability
    10.2 To calculate the effect of free surface in a rectangular-shaped tank
    10.3 Free surface moments
    10.4 Representation of free surface data in ships tank sounding / ullage tables.
    10.5 Factors influencing free surface effect
    Tutorial Questions


    SECTION 11 CURVES OF STATICAL STABILITY (GZ CURVES)

    11.1 Calculating GZ Values
    11.2 Procedure for constructing a curve of statical stability
    11.3 Information available from a curve of statical stability
    11.4 Curves of statical stability for stiff and tender ships
    Tutorial Questions


    SECTION 12 LIST

    12.1 Calculating list caused by transverse shift of weight the basic list triangle
    12.2 Calculating list caused by transverse and vertical shift of weight ship initially upright
    12.3 Calculating the list due to a single weight being loaded or discharged
    12.4 Shifting a weight already onboard to bring a listed ship upright
    12.5 Multiple weight problems ship initially upright
    12.6 Multiple weight problems ship initially listed
    12.7 Loading weight about the centreline to complete upright
    12.8 List and free surface effect
    Tutorial Questions


    SECTION 13 CURVES OF STATICAL STABILITY FOR VARYING CONDITIONS OF STABILITY

    13.1 Curves of statical stability for a ship in a stable condition
    13.2 Curve of statical stability for a ship in a neutral condition of stability
    13.3 Curve of statical stability for a ship in a unstable condition
    13.4 Curve of statical stability for a ship that is listed
    13.5 Correcting an angle of loll
    Tutorial Questions


    SECTION 14 SUSPENDED WEIGHTS

    41.1 Effect on KG lifting a weight using ships gear
    14.2 Loading a weight using ships lifting gear
    14.3 To calculate the maximum permissible KG required prior to loading or discharging a weight to ensure that a certain list limit is not exceeded
    Tutorial Questions


    SECTION 15 INTRODUCTION TO TRIM

    15.1 Terms relating to ship length
    15.2 Draught marks and reading the draught
    15.3 Trim
    15.4 Change of Trim
    15.5 Moment to change trim by one centimetre (MCTC)
    15.6 Formula for calculating MCTC
    15.7 Longitudinal centre of floatation (LCF or F)
    15.8 Calculating the final draughts when a weight is shifted
    15.9 The effect of loading and discharging weights
    15.10 Multiple weight problems
    15.11 Weight to shift to reduce the trim by a specific amount
    15.12 Weight to load to bring a ship to an even keel
    15.13Weight to transfer to reduce the deepest draught by a specific amount
    Tutorial Questions

    SECTION 16 TRIM USING HYDROSTATIC DATA

    16.1 True mean draught displacement when out of trim
    16.2 Calculating the true mean draught
    16.3 Trim calculations using hydrostatic data
    16.4 Trim by consideration of the relative positions of the LCB and LCG
    Tutorial Questions

    SECTION 17 INCLINING EXPERIMENT

    17.1 Calculating the KG as inclined
    17.2 Calculating the lightship KG and displacement
    17.3 Precautions to prior to conducting the experiment
    17.4 Precautions to ensure accuracy of the calculation
    Tutorial Questions

    SECTION 18 ASSESING COMPLIANCE OF A SHIPS LOADED CONDITION WITH IMO CRITERIA

    18.1 Simpsons First Rule
    18.2 Simpsons second Rule
    18.3 Intact stability the relevance of area under the curve of statical stability
    Tutorial Questions

    SECTION 19 PRACTICAL SHIP LOADING PROBLEMS

    19.1 Introduction to loading sheet data
    19.2 Practical Ship load problem
    Tutorial Questions

    Publication date: 15 Sep 2011
    Paperback

    Witherby Connect is the new online library solution for the maritime industry. Created by Witherbys’ in-house development team, Witherby Connect provides users with streamlined access to all major industry publications. 

    The browser-based hybrid software means that there is nothing to install and after publications are saved to the browser cache they can be accessed almost instantly both on and offline. This solution delivers more flexibility and security for those working at sea.

    Use on and offline: Witherby Connect provides flexible access. Publications can be viewed while connected to the internet and are downloaded to the browser’s cache for access offline, making it suitable for use even when internet access cannot be guaranteed.

    You can access Witherby Connect on any modern browser including: Google Chrome, Microsoft Edge, Mozilla Firefox and Apple Safari.

    Author: Rhodes, Martin

    Published: August 2009

    Ship Stability OOW covers the syllabus requirements forming the underpinning ship stability knowledge required for certification to STCW 95 Officer of the Watch (OOW) level.

    Many students worry that they do not have the mathematical ability for ship stability calculations. This publication addresses this problem by covering the subject in the simplest way possible at a level appropriate for a learner studying either independently or at college. Worked examples and self-assessment questions are provided throughout with tutorial questions at the end of each section.

    CONTENTS:

    SECTION 1 INTRODUCTION

    SECTION 2 BASIC PRINCIPLES

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

    SECTION 3 FORM COEFFICIENTS

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

    SECTION 4 TONNES PER CENTIMETRE IMMERSION

    4.1 TPC Formula
    4.2 Factors affecting TPC
    4.3 Interpolation of hydrostatic data
    4.4 Load/Discharge problems
    Tutorial Questions


    SECTION 5 LOAD LINES

    5.1 Factors for consideration in assigning a freeboard
    5.2 Type A and Type B ships
    5.3 Load Line dimensions
    5.4 Fresh Water Allowance (FWA)
    5.5 Dock Water Allowance (DWA)
    5.6 Load Line Calculations
    Tutorial Questions


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

    6.1 Centre of Gravity
    6.2 Effect of shifting a weight already onboard
    6.3 Effect of loading a weight
    6.4 Effect of discharging a weight
    6.5 Multiple weight problems
    6.6 Centre of buoyancy (B)
    Tutorial Questions


    SECTION 7 TRANSVERSE STATICAL STABILITY

    7.1 Transverse Statical Stability
    7.2 Righting Lever (GZ)
    7.3 Moment of statical stability (Righting Moment)
    7.4 Initial Transverse Metacentre
    7.5 Metacentric Height (GM)
    7.6 Calculating the Righting Moment at small angles of heel tutorial questions


    SECTION 8 CONDITIONS OF STABILITY

    8.1 Stable Condition
    8.2 Neutral Condition
    8.3 Unstable condition and angle of loll
    Tutorial Questions


    SECTION 9 INTIAL TRANSVERSE METACENTRE

    9.1 Initial Transverse metacentre explained
    9.2 Calculating KM for a box shaped vessel
    9.3 Use of the metacentre diagram
    9.4 To determine the final KG required completing loading with a required GM
    9.5 Factors affecting KM
    Tutorial Questions


    SECTION 10 FREE SURFACE EFFECT

    10.1 Free surface effect and transverse statical stability
    10.2 To calculate the effect of free surface in a rectangular-shaped tank
    10.3 Free surface moments
    10.4 Representation of free surface data in ships tank sounding / ullage tables.
    10.5 Factors influencing free surface effect
    Tutorial Questions


    SECTION 11 CURVES OF STATICAL STABILITY (GZ CURVES)

    11.1 Calculating GZ Values
    11.2 Procedure for constructing a curve of statical stability
    11.3 Information available from a curve of statical stability
    11.4 Curves of statical stability for stiff and tender ships
    Tutorial Questions


    SECTION 12 LIST

    12.1 Calculating list caused by transverse shift of weight the basic list triangle
    12.2 Calculating list caused by transverse and vertical shift of weight ship initially upright
    12.3 Calculating the list due to a single weight being loaded or discharged
    12.4 Shifting a weight already onboard to bring a listed ship upright
    12.5 Multiple weight problems ship initially upright
    12.6 Multiple weight problems ship initially listed
    12.7 Loading weight about the centreline to complete upright
    12.8 List and free surface effect
    Tutorial Questions


    SECTION 13 CURVES OF STATICAL STABILITY FOR VARYING CONDITIONS OF STABILITY

    13.1 Curves of statical stability for a ship in a stable condition
    13.2 Curve of statical stability for a ship in a neutral condition of stability
    13.3 Curve of statical stability for a ship in a unstable condition
    13.4 Curve of statical stability for a ship that is listed
    13.5 Correcting an angle of loll
    Tutorial Questions


    SECTION 14 SUSPENDED WEIGHTS

    41.1 Effect on KG lifting a weight using ships gear
    14.2 Loading a weight using ships lifting gear
    14.3 To calculate the maximum permissible KG required prior to loading or discharging a weight to ensure that a certain list limit is not exceeded
    Tutorial Questions


    SECTION 15 INTRODUCTION TO TRIM

    15.1 Terms relating to ship length
    15.2 Draught marks and reading the draught
    15.3 Trim
    15.4 Change of Trim
    15.5 Moment to change trim by one centimetre (MCTC)
    15.6 Formula for calculating MCTC
    15.7 Longitudinal centre of floatation (LCF or F)
    15.8 Calculating the final draughts when a weight is shifted
    15.9 The effect of loading and discharging weights
    15.10 Multiple weight problems
    15.11 Weight to shift to reduce the trim by a specific amount
    15.12 Weight to load to bring a ship to an even keel
    15.13Weight to transfer to reduce the deepest draught by a specific amount
    Tutorial Questions

    SECTION 16 TRIM USING HYDROSTATIC DATA

    16.1 True mean draught displacement when out of trim
    16.2 Calculating the true mean draught
    16.3 Trim calculations using hydrostatic data
    16.4 Trim by consideration of the relative positions of the LCB and LCG
    Tutorial Questions

    SECTION 17 INCLINING EXPERIMENT

    17.1 Calculating the KG as inclined
    17.2 Calculating the lightship KG and displacement
    17.3 Precautions to prior to conducting the experiment
    17.4 Precautions to ensure accuracy of the calculation
    Tutorial Questions

    SECTION 18 ASSESING COMPLIANCE OF A SHIPS LOADED CONDITION WITH IMO CRITERIA

    18.1 Simpsons First Rule
    18.2 Simpsons second Rule
    18.3 Intact stability the relevance of area under the curve of statical stability
    Tutorial Questions

    SECTION 19 PRACTICAL SHIP LOADING PROBLEMS

    19.1 Introduction to loading sheet data
    19.2 Practical Ship load problem
    Tutorial Questions

    Publication date: 15 Sep 2011
    Paperback

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