What are Factors taken into account during ship Building or Construction ?

• Displacement is made up of lightweight plus deadweight. The lightweight is the weight of vessel as built, including boiler water, lubricating oil, and cooling water system. Deadweight is the difference between the lightweight and loaded displacement, i.e. it is the weight of cargo plus weights of fuel, stores, water ballast, fresh water, crew and passengers, and baggage.

When carrying weight cargoes (e.g. ore) it is desirable to keep the lightweight as small as possible consistent with adequate strength. Since only cargo weight of the total deadweight is earning capital, other items should be kept to a minimum as long as the vessel fulfils its commitments.