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MARINE DESIGN (NA31002)

Ritwik Ghoshal

Spring 2026

Contact:

ritwik@naval.iitkgp.ac.in

Lecture-4

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Deadweight Carrier & Capacity Carrier

Deadweight Carrier

Capacity Carrier

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Machinery Weight Estimation

  • Power/ Weight Ratio
  • Admiralty Coefficient

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Machinery Weight Estimation

  • Problem:
  • Basic Ship Data : Brake Power=5250kW Displacement=13500tonnes Service speed=16knots Total Machinery weight=680 tonnes.
  • Estimate the total machinery weight for a new design ship having displacement of 14100 tonnes and Service speed = 16.25 knots

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Basic Ship Method

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Basic Ship Method

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Canal restrictions

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Problem 1

b)

a)

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Cube root format

  • From information on ships already built and in service, the Naval Architect can decide upon the relationships of L/B and B/H for the new ship. Knowing these values he can have a good first attempt at the Main Dimensions for the new vessel. He can use the following formula: