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MARINE DESIGN�(NA31002)

Ritwik Ghoshal

Spring 2026

Contact:

ritwik@naval.iitkgp.ac.in

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Syllabus (Design)

  • Design spiral,
  • Design Estimates & Geometric Design
  • Concept design
  • Objectives and constraints
  • Preliminary design
  • Hull form design and development
  • Optimal vessel design
  • Mooring Design

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Syllabus (Ship Economics)

  • SHIPPING'S ECONOMIC ENVIRONMENT
    • The Demand for Marine Transport, The Supply of Marine Transport, The Freight Markets, Operating Economics.
  • MAKING ENGINEERING ECONOMY CALCULATIONS
    • Introduction, The Basic Interest Relationships, Economic Criteria, Practical Cash Flows. Some Economic Complexities, A Complex Cash Flow Example, application
  • APPLICATION TO SHIP DESIGN
    • The General Approach, Comparison of Alternative Ship Designs, The Optimal Ship, The Wider Scene

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Resources

  • Design:
    • Ship Design for Efficiency and Economy by H. Schneekluth & Bertram
    • Practical Ship Design by D.G.M Watson

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  • Economics:
    • Engineering Economics and Ship Design by I.L. Buxton
    • Fundamentals of Ship Design Economics by Harry Benford

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  • Slides and Notes in Website
    • https://sites.google.com/site/ritwikghoshal/teaching

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Schedule

 

Period→

Day↓

1st

(8-8.55)

2nd

(9-9.55)

3rd

(10-10.55)

4th

(11-11.55)

5th

(12-12.55)

Lunch Break

6th

(2-2.55)

7th

(3-3.55)

8th

(4-4.55)

9th

(5-5.55)

 

Monday

 

 

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Tuesday

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Wednesday

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NA31002

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Thursday

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NA31002 

 

 

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Friday

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NA31002

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NA31002

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Marks distribution

  • Teacher’s Assessment: 40 %
    • Small Quizzes
    • Surprise tests
    • Submissions
    • Group Activities
  • Mid-Sem -30%
  • End-Sem - 30%

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  • Total – 40

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Preliminary Design Estimates & Geometric Design

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World Fleet

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Ship design Spiral

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Ship Design: Four Components

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Ship Design: Four Components

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Ship Design Algorithm

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Deadweight Carriers –Governing equations

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Parameter Estimation

  • The first estimates of parameters and coefficients is done:
    • from empirical formula available in published literature, or
    • from collection of recent data and statistical analysis, or
    • by extrapolating from a nearly similar ship
  • The selection of parameters affects shipbuilding cost considerably.
  • The order in which shipbuilding cost varies with main dimension generally is as follows:
    • Speed
    • Length
    • Breadth
    • Depth
    • Block Coefficient

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Primary Influence of Dimensions

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Preliminary Steel Weight Estimation

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Problem

  • For a basic and a design general cargo ship:

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  • Estimate the steel weight for the new design considering the main dimensions, block coefficient, scantling and sheer.