CONTENTS 



CHAPTER 61— THE PREDICTION OF SHIP BEHAVIOR IN CONFINED WATERS— Con- 

 tinued 



61.16 Lack of Reliable Data on Power and Pro- 

 pulsion-Device Performance 411 



61 . 17 Data on Confined- Water Operation at Super- 

 critical Speeds 412 



61.18 Data on Offset Running Positions and 



Steering in a Channel 413 



61 . 19 Prediction of Ship Resistance in Canal Locks 413 



61.20 Unexplained Anamolies in Shallow and 



Restricted Water Performance 414 



61.21 Summary of Shallow- and Restricted- Water 



Effects 414 



61 . 22 Partial Bibliography on the Effects of Con- 

 fined Waters on Models and Ships ... 415 



CHAPTER 62— ESTIMATING THE ADDED MASS OF WATER AROUND A SHIP IN UN- 

 STEADY MOTION 



62.1 

 62.2 



62.4 



General 417 62.5 



Added-Liquid Masses for Some Geometric 



Shapes and for Selected Modes of Motion 419 62.6 

 Comparison of a Vibrating Ship with a 



Vibrating Geometric Shape 423 62.7 



The Change of Added Mass Near a Large 



Boundary 432 62.8 



Estimating the Added-Mass Coefficients of 



Vibrating Ships in Confined Waters . . . 433 

 Estimating the Added-Mass Coefficients for 



Vibrating Propulsion Devices 436 



Added-Mass Data for Water Surrounding 



Ship Skegs and Appendages 438 



Partial Bibliography on Added-Mass and 



Damping Effects 439 



PART 4— HYDRODYNAMICS APPLIED TO THE DESIGN OF A SHIP 



CHAPTER 63— BASIC FACTORS IN SHIP DESIGN 



63.1 Definition of Ship Design 442 63.5 



63.2 Application and Scope of Part 4 442 63.6 



63.3 General Assumptions as to Propelling 63.7 



Machinery 443 63.8 



63.4 The Fundamental Requirements for Every 



Ship 443 



Design as a Compromise 444 



The Essence of Design 444 



The Design Schedule for a Ship 444 



The Field for Future Improvements in De- 

 sign 444 



CHAPTER 64— FORMULATION OF THE DESIGN SPECIFICATIONS INVOLVING HYDRO- 

 DYNAMICS 



64.1 General 446 



64.2 The First Task of the Designer 446 



64.3 Statement of the Principal Design Require- 



ments 446 



64.4 Absolute Size as a Factor in Maneuvering 



Requirements 452 



64.5 Tabulation of the Secondary Requirements . 452 



CHAPTER 65— GENERAL PROBLEMS OF THE SHIP DESIGNER 



65.1 Interpretation of Ready-Made Design Re- 65.6 



quirements 454 



65 . 2 Departures from the Letter of the Specifiea- 65 . 7 



tions 454 65.8 



65 . 3 Design and Performance Allowances .... 454 65 . 9 



65 . 4 Basis for the Selection of Ship Dimensions . 457 



65 . 5 Determination of the General Hull Features 457 



Limits for Wavegoing Conditions to be En- 

 countered 458 



The Bracketing Design Technique . . . • . . 458 



Adherence to Design Details in Construction 459 

 Guaranteeing the Performance of a New Ship 



Design 459 



CHAPTER 66— STEPS IN THE PRELIMINARY DESIGN 



66 . 1 General Considerations 460 66 . 5 



66 . 2 Analysis of the Hydrodynamic Requirements 460 



66 . 3 Probable Variable- Weight Conditions . . . 463 



66.4 First Weight Estimate 463 66.6 



First Approximation to Principal Dimen- 

 sions; The Waterline Length and Fatness 

 Ratio 464 



The Longitudinal Prismatic Coefficient . . . 467 



