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Lecture 10 – Ship Weights - Coggle Diagram
Lecture 10 – Ship Weights
SFI system
(reserved)
Ship General
Hull
Equipment for Cargo
Ship Equipment
Equipment for Crew and Passengers
Machinery Main Components
Systems for Machinery Main Components
Ship Common Systems
(reserved)
Classification of systems
• MARAD- MARitime ADministration, used by the U.S.A. administration
• SWBS- Ship Work Breakdown Structure, used by the USA Navy.
• SFI– developed by the Ship Research Institute, from Norway
Weight – important terminology
Lightship weight ( ≈ a ships own weight)
Deadweight ( ≈ the weight of what a ship is carrying)
Displacement (= Lightship weight + Deadweight = Total ship weight)
Contract deadweight: As specified by the shipbuilding contract
Deadweight acceptance limit: Value below of which a shipyard has
to compensate the owner (€/ton)
Deadweight rejection limit: Value below of which the owner has
the right to reject the ship
Legal deadweight: Value resulting from agreed on design
modifications
Weight calculation process
Rough preliminary weight assessment
Preliminary calculations
Intermediate/ control calculation
Final / Official calculations
Post-calculation to study i.e. how the weight
changed during the building process
Statistical analysis → weight statistics for future
shipbuilding projects
Inclining experiment to validate the weight
calculations