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Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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Preprints
https://doi.org/10.5194/nhess-2019-399
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/nhess-2019-399
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  28 Jan 2020

28 Jan 2020

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This preprint was under review for the journal NHESS but the revision was not accepted.

Identification of early warning criteria for rough sea ship navigation using high-resolution numerical wave simulation and shipboard measurements

Chen Chen1, Kenji Sasa1, and Takaaki Mizojiri2 Chen Chen et al.
  • 1Department of Maritime Sciences, Kobe University, Kobe, Japan 5-1-1, Fukae Minami Machi, Higashinada-Ku, Kobe, 658-0022 Japan
  • 2Imabari Shipbuilding Co. Ltd., Japan

Abstract. The analysis of ocean surface waves are essential to ensure a safe and economical navigation. Since 2010, different onboard observation data from a bulk carrier have been colledted for 6 years, including high-risk shipping regions in the Southern Hemisphere with strong ocean currents. For four rough sea cases, high-resolution numerical simulations of ocean waves, including the effect of wave-current interaction on ship navigation, have been performed using the WAVEWATCH III model. The simulations considered the ocean surface wind force from the widely used grid point value database NCEP-FNL and ERA-Interim. Aimed at providing practical suggestions for safe navigation by avoiding possible high-risk ocean regions as well as the construction of a more effective and efficient optimum ship routing system, the model results were validated based on onboard observations, followed by discussions on the responses of ship motion and navigation to wave states at different levels. Finally, identification of the early warning criteria, including various operational ocean parameters, is provided for ballast and loaded ships sailing in rough seas.

Chen Chen et al.

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Chen Chen et al.

Chen Chen et al.

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Short summary
To provide practical suggestions on avoiding high-risk ocean regions, an identification of early warning criteria has been made for an ocean-going cargo ship. High resolution numerical wave hindcasts as well as model validations against on-board observations have been done for four ballast and loaded rough sea navigation cases occurred in important shipping regions in the Southern Hemisphere. Responses of ship motion and navigation to various wave states are also discussed at different ranges.
To provide practical suggestions on avoiding high-risk ocean regions, an identification of early...
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