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Registros recuperados: 4
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Field determination of the leeway of drifting objects ArchiMer
Allen, Arthur; Roth, Jens-christian; Maisondieu, Christophe; Breivik, Oyvind; Forest, Bertrand.
The leeway (windage) of five typical SAR/HAZMAT objects (person in water, mine, small sailboat, small open boat and a 20-ft container) and is studied. The method is applicable to objects smaller than 30m
Tipo: Text Palavras-chave: SAR; HAZMAT; Trajectory models; Leeway; Windage; Surface drift; Operational oceanography.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00254/36492/35036.pdf
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Wind-induced drift of objects at sea: The leeway field method ArchiMer
Breivik, Oyvind; Allen, Arthur A.; Maisondieu, Christophe; Roth, Jens Christian.
A method for conducting leeway field experiments to establish the drift properties of small objects (0.1-25 m) is described. The objective is to define a standardized and unambiguous procedure for condensing the drift properties down to a set of coefficients that may be incorporated into existing stochastic trajectory forecast models for drifting objects of concern to search and rescue operations and other activities involving vessels lost at sea such as containers with hazardous material. An operational definition of the slip or wind and wave-induced motion of a drifting object relative to the ambient current is proposed. This definition taken together with a strict adherence to a 10 m wind speed allows us to refer unambiguously to the leeway of a...
Tipo: Text Palavras-chave: Search and rescue; SAR; Leeway; Trajectory modelling; Surface currents; Drifting objects; Drifters; Ocean modeling.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00037/14814/12152.pdf
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Advances in Search and Rescue at Sea ArchiMer
Breivik, Oyvind; Allen, Arthur Addoms; Maisondieu, Christophe; Olagnon, Michel.
A topical collection on “Advances in Search and Rescue at Sea” has appeared in recent issues of Ocean Dynamics following the latest in a series of workshops on “Technologies for Search and Rescue and other Emergency Marine Operations” (2004, 2006, 2008 and 2011), hosted by IFREMER in Brest, France. Here we give a brief overview of the history of search and rescue at sea before we summarize the main results of the papers that have appeared in the topical collection.
Tipo: Text Palavras-chave: Search and rescue (SAR); Trajectory modeling; Stochastic Lagrangian ocean models; Lagrangian measurement methods; Ocean surface currents.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00102/21311/19567.pdf
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The leeway of shipping containers at different immersion levels ArchiMer
Breivik, Oyvind; Allen, Arthur A.; Maisondieu, Christophe; Roth, Jens-christian; Forest, Bertrand.
The leeway of 20-ft containers in typical distress conditions is established through field experiments in a Norwegian fjord and in open-ocean conditions off the coast of France with a wind speed ranging from calm to 14 m s(-1). The experimental setup is described in detail, and certain recommendations were given for experiments on objects of this size. The results are compared with the leeway of a scaled-down container before the full set of measured leeway characteristics are compared with a semianalytical model of immersed containers. Our results are broadly consistent with the semianalytical model, but the model is found to be sensitive to choice of drag coefficient and makes no estimate of the crosswind leeway of containers. We extend the results from...
Tipo: Text Palavras-chave: Search and rescue; Surface drift; Lagrangian field studies; Trajectory modeling; HAZMAT.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00079/19047/17219.pdf
Registros recuperados: 4
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