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Publicações
Bessa Pacheco, M. e Guedes Soares, C. (2007), “Ship Weather Routing Based on Seakeeping Performance”, Advancements in Marine Structures, Guedes Soares, C. e Das, P.K. (Eds.), Taylor & Francis Group, London, UK, pp. 71-78
Ship weather routing is the process to efficiently avoid undesired sailing conditions, especially due to bad weather. Issues at stake are not only the ships and cargo safety, but also crew comfort. Some major factors to be considered in this process are: the minimum route distance between ports, the predicted sea state for the sailing period and the ships seakeeping performance. This paper presents a geographic information system (GIS) that determines the best sailing route, based on multicriteria raster grid analysis. The system is fed with data from a wave forecast model applied to the North Atlantic and calculates the ships performance for different wave significant height, period and relative wave direction to the ship’s route. Ship’s seakeeping performance in based on the roll, pitch and yaw responses. A case study is presented for a voyage between Lisbon and New York, during the month of November 2006, for a container ship sailing at 22 kts. The processing result is a geospatial cost-travelling matrix that is used to calculate the accumulated cost to sail to New York. Based on this matrix, the least cost path is then calculated and presented.
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