This study principally adopts the weather forecast data of WAVEWATCH III (WW3) model and Ocean Surface Currents Analysis – Real time (OSCAR) system as inputs of our weather routing system. For the sake of different purposes of routing problems, the proposed 3DMI (3-Dimensional Modified Isochrone) method considers two types of routing strategies, i.e. ETA (Estimated Time of Arrival) routing and FUEL (FUEL-saving) routing, with different constraints, such as land boundaries, significant wave heights, engine revolution speeds and roll responses. Eventually, it is demonstrated that the robustness of the proposed method seems to be a solution to multi-objective problems by adjusting the safety threshold for the trade-off of ship efficiency and economics.

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