With the recent decision by the International Maritime Organization (IMO) to reduce maritime Greenhouse gas emissions by at least 50% by 2050, designing and implementing cost-effective measures to reduce fuel consumption and emissions becomes core priority for naval architects, shipbuilders and owners. Although many vessels in recent years have been delivered with new bow types aimed at reducing additional power in a seaway, the tendency has been to fit these to existing designs and not looking at the full potential emission reduction possible by altering main dimensions and total fullness. In this study we demonstrate how simplified models and tools can be used in the early stage of the project to decide main dimensions and fulness with focus on reducing fuel consumption and cost in the seaway.

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